/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.check.absence.of.signed.integer.overflows true -i ../../../trunk/examples/svcomp/weaver/popl20-more-multiply-verify.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-27 01:26:02,037 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-27 01:26:02,108 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-08-27 01:26:02,117 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-27 01:26:02,118 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-27 01:26:02,152 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-27 01:26:02,153 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-27 01:26:02,158 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-27 01:26:02,158 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-27 01:26:02,159 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-27 01:26:02,159 INFO L153 SettingsManager]: * Use SBE=true [2023-08-27 01:26:02,160 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-27 01:26:02,160 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-27 01:26:02,160 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-27 01:26:02,160 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-27 01:26:02,161 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-27 01:26:02,161 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-27 01:26:02,161 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-27 01:26:02,162 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-27 01:26:02,162 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-27 01:26:02,162 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-27 01:26:02,166 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-27 01:26:02,166 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-27 01:26:02,167 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-27 01:26:02,170 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-27 01:26:02,170 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-27 01:26:02,170 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-27 01:26:02,171 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-27 01:26:02,171 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-27 01:26:02,171 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-27 01:26:02,171 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-27 01:26:02,172 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-27 01:26:02,172 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-27 01:26:02,172 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-27 01:26:02,172 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-27 01:26:02,173 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check absence of signed integer overflows -> true [2023-08-27 01:26:02,503 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-27 01:26:02,522 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-27 01:26:02,525 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-27 01:26:02,527 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-27 01:26:02,527 INFO L274 PluginConnector]: CDTParser initialized [2023-08-27 01:26:02,528 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-multiply-verify.wvr.c [2023-08-27 01:26:03,795 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-27 01:26:04,009 INFO L384 CDTParser]: Found 1 translation units. [2023-08-27 01:26:04,010 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-multiply-verify.wvr.c [2023-08-27 01:26:04,016 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/318c54cd9/bf592605ce714ae0b133f5bfaf56394c/FLAGaf03613d4 [2023-08-27 01:26:04,026 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/318c54cd9/bf592605ce714ae0b133f5bfaf56394c [2023-08-27 01:26:04,029 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-27 01:26:04,030 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-27 01:26:04,031 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-27 01:26:04,031 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-27 01:26:04,033 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-27 01:26:04,034 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 01:26:04" (1/1) ... [2023-08-27 01:26:04,034 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c7599aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:26:04, skipping insertion in model container [2023-08-27 01:26:04,035 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 01:26:04" (1/1) ... [2023-08-27 01:26:04,054 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-27 01:26:04,195 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-27 01:26:04,203 INFO L201 MainTranslator]: Completed pre-run [2023-08-27 01:26:04,236 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-27 01:26:04,243 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-27 01:26:04,244 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-27 01:26:04,249 INFO L206 MainTranslator]: Completed translation [2023-08-27 01:26:04,250 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:26:04 WrapperNode [2023-08-27 01:26:04,250 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-27 01:26:04,251 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-27 01:26:04,251 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-27 01:26:04,251 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-27 01:26:04,256 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:26:04" (1/1) ... [2023-08-27 01:26:04,263 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:26:04" (1/1) ... [2023-08-27 01:26:04,287 INFO L138 Inliner]: procedures = 26, calls = 51, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 205 [2023-08-27 01:26:04,287 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-27 01:26:04,288 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-27 01:26:04,288 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-27 01:26:04,288 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-27 01:26:04,296 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:26:04" (1/1) ... [2023-08-27 01:26:04,296 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:26:04" (1/1) ... [2023-08-27 01:26:04,307 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:26:04" (1/1) ... [2023-08-27 01:26:04,307 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:26:04" (1/1) ... [2023-08-27 01:26:04,314 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:26:04" (1/1) ... [2023-08-27 01:26:04,317 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:26:04" (1/1) ... [2023-08-27 01:26:04,319 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:26:04" (1/1) ... [2023-08-27 01:26:04,320 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:26:04" (1/1) ... [2023-08-27 01:26:04,322 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-27 01:26:04,323 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-27 01:26:04,323 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-27 01:26:04,323 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-27 01:26:04,324 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:26:04" (1/1) ... [2023-08-27 01:26:04,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-27 01:26:04,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:26:04,352 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-27 01:26:04,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-27 01:26:04,378 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-27 01:26:04,378 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-27 01:26:04,378 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-27 01:26:04,378 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-27 01:26:04,378 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-27 01:26:04,379 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-27 01:26:04,379 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-27 01:26:04,379 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-27 01:26:04,379 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-27 01:26:04,379 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-27 01:26:04,379 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-27 01:26:04,379 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-27 01:26:04,379 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-27 01:26:04,380 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-27 01:26:04,380 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-27 01:26:04,380 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-27 01:26:04,380 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-27 01:26:04,381 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-27 01:26:04,474 INFO L236 CfgBuilder]: Building ICFG [2023-08-27 01:26:04,476 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-27 01:26:04,770 INFO L277 CfgBuilder]: Performing block encoding [2023-08-27 01:26:04,948 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-27 01:26:04,948 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-27 01:26:04,950 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 01:26:04 BoogieIcfgContainer [2023-08-27 01:26:04,950 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-27 01:26:04,952 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-27 01:26:04,952 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-27 01:26:04,955 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-27 01:26:04,955 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.08 01:26:04" (1/3) ... [2023-08-27 01:26:04,956 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22bdf528 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 01:26:04, skipping insertion in model container [2023-08-27 01:26:04,956 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:26:04" (2/3) ... [2023-08-27 01:26:04,956 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22bdf528 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 01:26:04, skipping insertion in model container [2023-08-27 01:26:04,956 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 01:26:04" (3/3) ... [2023-08-27 01:26:04,957 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-multiply-verify.wvr.c [2023-08-27 01:26:04,972 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-27 01:26:04,972 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 13 error locations. [2023-08-27 01:26:04,973 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-27 01:26:05,084 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-27 01:26:05,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 170 places, 169 transitions, 362 flow [2023-08-27 01:26:05,218 INFO L124 PetriNetUnfolderBase]: 9/166 cut-off events. [2023-08-27 01:26:05,218 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-27 01:26:05,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 179 conditions, 166 events. 9/166 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 158 event pairs, 0 based on Foata normal form. 0/144 useless extension candidates. Maximal degree in co-relation 123. Up to 2 conditions per place. [2023-08-27 01:26:05,223 INFO L82 GeneralOperation]: Start removeDead. Operand has 170 places, 169 transitions, 362 flow [2023-08-27 01:26:05,231 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 156 places, 155 transitions, 328 flow [2023-08-27 01:26:05,235 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-27 01:26:05,250 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 156 places, 155 transitions, 328 flow [2023-08-27 01:26:05,254 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 156 places, 155 transitions, 328 flow [2023-08-27 01:26:05,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 156 places, 155 transitions, 328 flow [2023-08-27 01:26:05,305 INFO L124 PetriNetUnfolderBase]: 9/155 cut-off events. [2023-08-27 01:26:05,305 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-27 01:26:05,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 168 conditions, 155 events. 9/155 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 157 event pairs, 0 based on Foata normal form. 0/134 useless extension candidates. Maximal degree in co-relation 123. Up to 2 conditions per place. [2023-08-27 01:26:05,308 INFO L119 LiptonReduction]: Number of co-enabled transitions 2508 [2023-08-27 01:26:10,953 INFO L134 LiptonReduction]: Checked pairs total: 2877 [2023-08-27 01:26:10,954 INFO L136 LiptonReduction]: Total number of compositions: 149 [2023-08-27 01:26:10,973 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-27 01:26:10,985 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;@26ee3dd1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-27 01:26:10,985 INFO L358 AbstractCegarLoop]: Starting to check reachability of 26 error locations. [2023-08-27 01:26:10,987 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-27 01:26:10,987 INFO L124 PetriNetUnfolderBase]: 1/2 cut-off events. [2023-08-27 01:26:10,987 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-27 01:26:10,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:26:10,988 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-27 01:26:10,988 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-08-27 01:26:10,991 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:26:10,991 INFO L85 PathProgramCache]: Analyzing trace with hash 24616, now seen corresponding path program 1 times [2023-08-27 01:26:11,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:26:11,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160734245] [2023-08-27 01:26:11,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:26:11,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:26:11,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:26:11,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:26:11,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:26:11,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160734245] [2023-08-27 01:26:11,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160734245] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 01:26:11,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 01:26:11,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-27 01:26:11,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045174154] [2023-08-27 01:26:11,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 01:26:11,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 01:26:11,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:26:11,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 01:26:11,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 01:26:11,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 318 [2023-08-27 01:26:11,340 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 34 transitions, 86 flow. Second operand has 3 states, 3 states have (on average 137.66666666666666) internal successors, (413), 3 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 01:26:11,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:26:11,340 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 318 [2023-08-27 01:26:11,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:26:11,486 INFO L124 PetriNetUnfolderBase]: 523/780 cut-off events. [2023-08-27 01:26:11,486 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-27 01:26:11,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1633 conditions, 780 events. 523/780 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 2668 event pairs, 413 based on Foata normal form. 0/434 useless extension candidates. Maximal degree in co-relation 1320. Up to 780 conditions per place. [2023-08-27 01:26:11,493 INFO L140 encePairwiseOnDemand]: 308/318 looper letters, 28 selfloop transitions, 3 changer transitions 0/31 dead transitions. [2023-08-27 01:26:11,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 31 transitions, 142 flow [2023-08-27 01:26:11,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 01:26:11,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 01:26:11,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 449 transitions. [2023-08-27 01:26:11,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47064989517819705 [2023-08-27 01:26:11,506 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 449 transitions. [2023-08-27 01:26:11,507 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 449 transitions. [2023-08-27 01:26:11,508 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:26:11,510 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 449 transitions. [2023-08-27 01:26:11,513 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 149.66666666666666) internal successors, (449), 3 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:11,518 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 318.0) internal successors, (1272), 4 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:11,518 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 318.0) internal successors, (1272), 4 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:11,520 INFO L175 Difference]: Start difference. First operand has 41 places, 34 transitions, 86 flow. Second operand 3 states and 449 transitions. [2023-08-27 01:26:11,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 31 transitions, 142 flow [2023-08-27 01:26:11,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 31 transitions, 130 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-27 01:26:11,525 INFO L231 Difference]: Finished difference. Result has 33 places, 31 transitions, 85 flow [2023-08-27 01:26:11,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=85, PETRI_PLACES=33, PETRI_TRANSITIONS=31} [2023-08-27 01:26:11,529 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, -8 predicate places. [2023-08-27 01:26:11,529 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 31 transitions, 85 flow [2023-08-27 01:26:11,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 137.66666666666666) internal successors, (413), 3 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 01:26:11,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:26:11,530 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-27 01:26:11,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-27 01:26:11,530 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-08-27 01:26:11,530 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:26:11,531 INFO L85 PathProgramCache]: Analyzing trace with hash 764431, now seen corresponding path program 1 times [2023-08-27 01:26:11,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:26:11,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064952490] [2023-08-27 01:26:11,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:26:11,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:26:11,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:26:11,592 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:26:11,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:26:11,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064952490] [2023-08-27 01:26:11,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064952490] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:26:11,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694114176] [2023-08-27 01:26:11,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:26:11,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:26:11,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:26:11,596 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 01:26:11,634 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-27 01:26:11,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:26:11,723 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-27 01:26:11,727 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:26:11,774 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 01:26:11,774 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 01:26:11,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694114176] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 01:26:11,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 01:26:11,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 3 [2023-08-27 01:26:11,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724898416] [2023-08-27 01:26:11,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 01:26:11,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 01:26:11,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:26:11,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 01:26:11,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-27 01:26:11,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 318 [2023-08-27 01:26:11,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 31 transitions, 85 flow. Second operand has 4 states, 4 states have (on average 137.75) internal successors, (551), 4 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:11,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:26:11,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 318 [2023-08-27 01:26:11,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:26:11,914 INFO L124 PetriNetUnfolderBase]: 523/779 cut-off events. [2023-08-27 01:26:11,914 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-08-27 01:26:11,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1591 conditions, 779 events. 523/779 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 2657 event pairs, 413 based on Foata normal form. 0/434 useless extension candidates. Maximal degree in co-relation 1567. Up to 776 conditions per place. [2023-08-27 01:26:11,922 INFO L140 encePairwiseOnDemand]: 314/318 looper letters, 26 selfloop transitions, 4 changer transitions 0/30 dead transitions. [2023-08-27 01:26:11,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 30 transitions, 141 flow [2023-08-27 01:26:11,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 01:26:11,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 01:26:11,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 579 transitions. [2023-08-27 01:26:11,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.455188679245283 [2023-08-27 01:26:11,927 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 579 transitions. [2023-08-27 01:26:11,927 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 579 transitions. [2023-08-27 01:26:11,928 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:26:11,931 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 579 transitions. [2023-08-27 01:26:11,933 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 144.75) internal successors, (579), 4 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:11,936 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 318.0) internal successors, (1590), 5 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:11,941 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 318.0) internal successors, (1590), 5 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:11,942 INFO L175 Difference]: Start difference. First operand has 33 places, 31 transitions, 85 flow. Second operand 4 states and 579 transitions. [2023-08-27 01:26:11,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 30 transitions, 141 flow [2023-08-27 01:26:11,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 30 transitions, 136 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-27 01:26:11,943 INFO L231 Difference]: Finished difference. Result has 34 places, 30 transitions, 84 flow [2023-08-27 01:26:11,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=84, PETRI_PLACES=34, PETRI_TRANSITIONS=30} [2023-08-27 01:26:11,944 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, -7 predicate places. [2023-08-27 01:26:11,944 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 30 transitions, 84 flow [2023-08-27 01:26:11,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 137.75) internal successors, (551), 4 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:11,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:26:11,945 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-27 01:26:11,955 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-27 01:26:12,151 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 01:26:12,151 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-08-27 01:26:12,152 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:26:12,152 INFO L85 PathProgramCache]: Analyzing trace with hash 764441, now seen corresponding path program 1 times [2023-08-27 01:26:12,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:26:12,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518220465] [2023-08-27 01:26:12,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:26:12,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:26:12,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:26:12,209 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:26:12,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:26:12,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518220465] [2023-08-27 01:26:12,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518220465] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:26:12,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329876762] [2023-08-27 01:26:12,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:26:12,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:26:12,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:26:12,211 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 01:26:12,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-27 01:26:12,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:26:12,326 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-27 01:26:12,326 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:26:12,334 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:26:12,335 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:26:12,350 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:26:12,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329876762] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:26:12,350 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:26:12,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-08-27 01:26:12,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837155081] [2023-08-27 01:26:12,350 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:26:12,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-27 01:26:12,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:26:12,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-27 01:26:12,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-27 01:26:12,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 318 [2023-08-27 01:26:12,354 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 30 transitions, 84 flow. Second operand has 7 states, 7 states have (on average 138.14285714285714) internal successors, (967), 7 states have internal predecessors, (967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:12,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:26:12,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 318 [2023-08-27 01:26:12,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:26:12,487 INFO L124 PetriNetUnfolderBase]: 526/785 cut-off events. [2023-08-27 01:26:12,487 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-08-27 01:26:12,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1613 conditions, 785 events. 526/785 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 2681 event pairs, 413 based on Foata normal form. 0/442 useless extension candidates. Maximal degree in co-relation 1567. Up to 782 conditions per place. [2023-08-27 01:26:12,491 INFO L140 encePairwiseOnDemand]: 314/318 looper letters, 27 selfloop transitions, 9 changer transitions 0/36 dead transitions. [2023-08-27 01:26:12,492 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 36 transitions, 186 flow [2023-08-27 01:26:12,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-27 01:26:12,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-27 01:26:12,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 861 transitions. [2023-08-27 01:26:12,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45125786163522014 [2023-08-27 01:26:12,495 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 861 transitions. [2023-08-27 01:26:12,495 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 861 transitions. [2023-08-27 01:26:12,495 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:26:12,495 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 861 transitions. [2023-08-27 01:26:12,497 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 143.5) internal successors, (861), 6 states have internal predecessors, (861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:12,500 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 318.0) internal successors, (2226), 7 states have internal predecessors, (2226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:12,501 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 318.0) internal successors, (2226), 7 states have internal predecessors, (2226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:12,501 INFO L175 Difference]: Start difference. First operand has 34 places, 30 transitions, 84 flow. Second operand 6 states and 861 transitions. [2023-08-27 01:26:12,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 36 transitions, 186 flow [2023-08-27 01:26:12,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 36 transitions, 177 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-27 01:26:12,503 INFO L231 Difference]: Finished difference. Result has 40 places, 36 transitions, 142 flow [2023-08-27 01:26:12,503 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=142, PETRI_PLACES=40, PETRI_TRANSITIONS=36} [2023-08-27 01:26:12,503 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, -1 predicate places. [2023-08-27 01:26:12,503 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 36 transitions, 142 flow [2023-08-27 01:26:12,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 138.14285714285714) internal successors, (967), 7 states have internal predecessors, (967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:12,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:26:12,504 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-27 01:26:12,515 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-27 01:26:12,710 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 01:26:12,710 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-08-27 01:26:12,711 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:26:12,711 INFO L85 PathProgramCache]: Analyzing trace with hash 734336447, now seen corresponding path program 1 times [2023-08-27 01:26:12,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:26:12,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719391092] [2023-08-27 01:26:12,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:26:12,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:26:12,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:26:12,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:26:12,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:26:12,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719391092] [2023-08-27 01:26:12,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719391092] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 01:26:12,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 01:26:12,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 01:26:12,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914426991] [2023-08-27 01:26:12,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 01:26:12,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 01:26:12,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:26:12,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 01:26:12,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-27 01:26:12,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 318 [2023-08-27 01:26:12,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 36 transitions, 142 flow. Second operand has 4 states, 4 states have (on average 131.25) internal successors, (525), 4 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:12,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:26:12,812 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 318 [2023-08-27 01:26:12,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:26:12,964 INFO L124 PetriNetUnfolderBase]: 530/810 cut-off events. [2023-08-27 01:26:12,964 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2023-08-27 01:26:12,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1687 conditions, 810 events. 530/810 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 2877 event pairs, 366 based on Foata normal form. 0/504 useless extension candidates. Maximal degree in co-relation 1651. Up to 644 conditions per place. [2023-08-27 01:26:12,969 INFO L140 encePairwiseOnDemand]: 307/318 looper letters, 47 selfloop transitions, 4 changer transitions 0/51 dead transitions. [2023-08-27 01:26:12,969 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 51 transitions, 279 flow [2023-08-27 01:26:12,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 01:26:12,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 01:26:12,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 572 transitions. [2023-08-27 01:26:12,971 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.449685534591195 [2023-08-27 01:26:12,971 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 572 transitions. [2023-08-27 01:26:12,972 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 572 transitions. [2023-08-27 01:26:12,972 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:26:12,972 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 572 transitions. [2023-08-27 01:26:12,973 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 143.0) internal successors, (572), 4 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:12,975 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 318.0) internal successors, (1590), 5 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:12,976 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 318.0) internal successors, (1590), 5 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:12,976 INFO L175 Difference]: Start difference. First operand has 40 places, 36 transitions, 142 flow. Second operand 4 states and 572 transitions. [2023-08-27 01:26:12,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 51 transitions, 279 flow [2023-08-27 01:26:12,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 51 transitions, 258 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-08-27 01:26:12,980 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 152 flow [2023-08-27 01:26:12,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=121, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=152, PETRI_PLACES=44, PETRI_TRANSITIONS=37} [2023-08-27 01:26:12,985 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 3 predicate places. [2023-08-27 01:26:12,985 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 152 flow [2023-08-27 01:26:12,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 131.25) internal successors, (525), 4 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:12,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:26:12,987 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-27 01:26:12,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-27 01:26:12,987 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-08-27 01:26:12,987 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:26:12,987 INFO L85 PathProgramCache]: Analyzing trace with hash 1299653106, now seen corresponding path program 2 times [2023-08-27 01:26:12,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:26:12,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996886326] [2023-08-27 01:26:12,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:26:12,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:26:13,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:26:13,107 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:26:13,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:26:13,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996886326] [2023-08-27 01:26:13,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996886326] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:26:13,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027575087] [2023-08-27 01:26:13,108 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 01:26:13,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:26:13,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:26:13,109 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 01:26:13,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-27 01:26:13,190 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-27 01:26:13,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:26:13,191 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-27 01:26:13,192 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:26:13,205 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-27 01:26:13,206 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 01:26:13,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027575087] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 01:26:13,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 01:26:13,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [5] total 6 [2023-08-27 01:26:13,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419825369] [2023-08-27 01:26:13,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 01:26:13,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 01:26:13,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:26:13,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 01:26:13,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-08-27 01:26:13,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 318 [2023-08-27 01:26:13,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 152 flow. Second operand has 3 states, 3 states have (on average 139.0) internal successors, (417), 3 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:13,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:26:13,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 318 [2023-08-27 01:26:13,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:26:13,324 INFO L124 PetriNetUnfolderBase]: 530/809 cut-off events. [2023-08-27 01:26:13,325 INFO L125 PetriNetUnfolderBase]: For 179/179 co-relation queries the response was YES. [2023-08-27 01:26:13,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2075 conditions, 809 events. 530/809 cut-off events. For 179/179 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 2849 event pairs, 392 based on Foata normal form. 1/636 useless extension candidates. Maximal degree in co-relation 2048. Up to 809 conditions per place. [2023-08-27 01:26:13,329 INFO L140 encePairwiseOnDemand]: 316/318 looper letters, 35 selfloop transitions, 1 changer transitions 0/36 dead transitions. [2023-08-27 01:26:13,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 36 transitions, 214 flow [2023-08-27 01:26:13,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 01:26:13,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 01:26:13,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 442 transitions. [2023-08-27 01:26:13,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46331236897274636 [2023-08-27 01:26:13,331 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 442 transitions. [2023-08-27 01:26:13,331 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 442 transitions. [2023-08-27 01:26:13,331 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:26:13,332 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 442 transitions. [2023-08-27 01:26:13,333 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 147.33333333333334) internal successors, (442), 3 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:13,334 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 318.0) internal successors, (1272), 4 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:13,334 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 318.0) internal successors, (1272), 4 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:13,335 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 152 flow. Second operand 3 states and 442 transitions. [2023-08-27 01:26:13,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 36 transitions, 214 flow [2023-08-27 01:26:13,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 36 transitions, 195 flow, removed 2 selfloop flow, removed 5 redundant places. [2023-08-27 01:26:13,336 INFO L231 Difference]: Finished difference. Result has 40 places, 36 transitions, 125 flow [2023-08-27 01:26:13,336 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=123, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=125, PETRI_PLACES=40, PETRI_TRANSITIONS=36} [2023-08-27 01:26:13,337 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, -1 predicate places. [2023-08-27 01:26:13,337 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 36 transitions, 125 flow [2023-08-27 01:26:13,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 139.0) internal successors, (417), 3 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:13,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:26:13,338 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-27 01:26:13,348 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-27 01:26:13,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:26:13,543 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-08-27 01:26:13,544 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:26:13,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1299328632, now seen corresponding path program 1 times [2023-08-27 01:26:13,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:26:13,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810850457] [2023-08-27 01:26:13,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:26:13,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:26:13,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:26:13,646 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:26:13,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:26:13,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810850457] [2023-08-27 01:26:13,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810850457] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:26:13,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892493695] [2023-08-27 01:26:13,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:26:13,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:26:13,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:26:13,648 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 01:26:13,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-27 01:26:13,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:26:13,725 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-27 01:26:13,726 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:26:13,735 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 01:26:13,736 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 01:26:13,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892493695] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 01:26:13,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 01:26:13,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3] total 4 [2023-08-27 01:26:13,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301675579] [2023-08-27 01:26:13,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 01:26:13,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 01:26:13,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:26:13,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 01:26:13,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-27 01:26:13,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 318 [2023-08-27 01:26:13,738 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 36 transitions, 125 flow. Second operand has 3 states, 3 states have (on average 144.0) internal successors, (432), 3 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:13,738 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:26:13,738 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 318 [2023-08-27 01:26:13,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:26:13,790 INFO L124 PetriNetUnfolderBase]: 225/356 cut-off events. [2023-08-27 01:26:13,790 INFO L125 PetriNetUnfolderBase]: For 101/101 co-relation queries the response was YES. [2023-08-27 01:26:13,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 878 conditions, 356 events. 225/356 cut-off events. For 101/101 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 938 event pairs, 139 based on Foata normal form. 0/356 useless extension candidates. Maximal degree in co-relation 867. Up to 356 conditions per place. [2023-08-27 01:26:13,792 INFO L140 encePairwiseOnDemand]: 313/318 looper letters, 31 selfloop transitions, 1 changer transitions 0/32 dead transitions. [2023-08-27 01:26:13,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 32 transitions, 173 flow [2023-08-27 01:26:13,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 01:26:13,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 01:26:13,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 453 transitions. [2023-08-27 01:26:13,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4748427672955975 [2023-08-27 01:26:13,794 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 453 transitions. [2023-08-27 01:26:13,795 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 453 transitions. [2023-08-27 01:26:13,795 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:26:13,795 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 453 transitions. [2023-08-27 01:26:13,796 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 151.0) internal successors, (453), 3 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:13,797 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 318.0) internal successors, (1272), 4 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:13,798 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 318.0) internal successors, (1272), 4 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:13,798 INFO L175 Difference]: Start difference. First operand has 40 places, 36 transitions, 125 flow. Second operand 3 states and 453 transitions. [2023-08-27 01:26:13,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 32 transitions, 173 flow [2023-08-27 01:26:13,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 32 transitions, 172 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 01:26:13,799 INFO L231 Difference]: Finished difference. Result has 37 places, 32 transitions, 110 flow [2023-08-27 01:26:13,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=110, PETRI_PLACES=37, PETRI_TRANSITIONS=32} [2023-08-27 01:26:13,800 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, -4 predicate places. [2023-08-27 01:26:13,800 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 32 transitions, 110 flow [2023-08-27 01:26:13,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 144.0) internal successors, (432), 3 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:13,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:26:13,801 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:26:13,808 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-27 01:26:14,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:26:14,007 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-08-27 01:26:14,007 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:26:14,007 INFO L85 PathProgramCache]: Analyzing trace with hash -1903608878, now seen corresponding path program 1 times [2023-08-27 01:26:14,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:26:14,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140680569] [2023-08-27 01:26:14,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:26:14,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:26:14,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:26:14,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:26:14,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:26:14,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140680569] [2023-08-27 01:26:14,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140680569] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 01:26:14,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 01:26:14,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 01:26:14,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955180769] [2023-08-27 01:26:14,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 01:26:14,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 01:26:14,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:26:14,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 01:26:14,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-27 01:26:14,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 318 [2023-08-27 01:26:14,059 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 32 transitions, 110 flow. Second operand has 4 states, 4 states have (on average 137.0) internal successors, (548), 4 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:14,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:26:14,059 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 318 [2023-08-27 01:26:14,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:26:14,103 INFO L124 PetriNetUnfolderBase]: 172/277 cut-off events. [2023-08-27 01:26:14,103 INFO L125 PetriNetUnfolderBase]: For 98/98 co-relation queries the response was YES. [2023-08-27 01:26:14,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 661 conditions, 277 events. 172/277 cut-off events. For 98/98 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 684 event pairs, 108 based on Foata normal form. 34/311 useless extension candidates. Maximal degree in co-relation 649. Up to 277 conditions per place. [2023-08-27 01:26:14,104 INFO L140 encePairwiseOnDemand]: 316/318 looper letters, 28 selfloop transitions, 1 changer transitions 1/30 dead transitions. [2023-08-27 01:26:14,105 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 30 transitions, 160 flow [2023-08-27 01:26:14,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 01:26:14,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 01:26:14,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 428 transitions. [2023-08-27 01:26:14,106 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44863731656184486 [2023-08-27 01:26:14,106 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 428 transitions. [2023-08-27 01:26:14,106 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 428 transitions. [2023-08-27 01:26:14,107 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:26:14,107 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 428 transitions. [2023-08-27 01:26:14,108 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 142.66666666666666) internal successors, (428), 3 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:14,109 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 318.0) internal successors, (1272), 4 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:14,109 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 318.0) internal successors, (1272), 4 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:14,109 INFO L175 Difference]: Start difference. First operand has 37 places, 32 transitions, 110 flow. Second operand 3 states and 428 transitions. [2023-08-27 01:26:14,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 30 transitions, 160 flow [2023-08-27 01:26:14,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 30 transitions, 155 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-27 01:26:14,111 INFO L231 Difference]: Finished difference. Result has 35 places, 29 transitions, 91 flow [2023-08-27 01:26:14,111 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=95, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=91, PETRI_PLACES=35, PETRI_TRANSITIONS=29} [2023-08-27 01:26:14,111 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, -6 predicate places. [2023-08-27 01:26:14,111 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 29 transitions, 91 flow [2023-08-27 01:26:14,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 137.0) internal successors, (548), 4 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:14,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:26:14,112 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:26:14,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-27 01:26:14,112 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-08-27 01:26:14,112 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:26:14,113 INFO L85 PathProgramCache]: Analyzing trace with hash -1092209789, now seen corresponding path program 1 times [2023-08-27 01:26:14,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:26:14,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893607931] [2023-08-27 01:26:14,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:26:14,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:26:14,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:26:14,225 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:26:14,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:26:14,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893607931] [2023-08-27 01:26:14,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893607931] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:26:14,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877443837] [2023-08-27 01:26:14,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:26:14,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:26:14,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:26:14,227 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 01:26:14,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-27 01:26:14,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:26:14,369 INFO L262 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-27 01:26:14,371 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:26:14,439 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:26:14,439 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:26:14,515 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:26:14,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877443837] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:26:14,515 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:26:14,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 10 [2023-08-27 01:26:14,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698712645] [2023-08-27 01:26:14,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:26:14,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-27 01:26:14,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:26:14,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-27 01:26:14,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2023-08-27 01:26:14,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 318 [2023-08-27 01:26:14,522 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 29 transitions, 91 flow. Second operand has 11 states, 11 states have (on average 131.1818181818182) internal successors, (1443), 11 states have internal predecessors, (1443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:14,522 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:26:14,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 318 [2023-08-27 01:26:14,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:26:14,638 INFO L124 PetriNetUnfolderBase]: 205/332 cut-off events. [2023-08-27 01:26:14,638 INFO L125 PetriNetUnfolderBase]: For 69/69 co-relation queries the response was YES. [2023-08-27 01:26:14,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 790 conditions, 332 events. 205/332 cut-off events. For 69/69 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 922 event pairs, 108 based on Foata normal form. 30/362 useless extension candidates. Maximal degree in co-relation 779. Up to 221 conditions per place. [2023-08-27 01:26:14,640 INFO L140 encePairwiseOnDemand]: 312/318 looper letters, 25 selfloop transitions, 3 changer transitions 24/52 dead transitions. [2023-08-27 01:26:14,640 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 52 transitions, 251 flow [2023-08-27 01:26:14,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-27 01:26:14,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-27 01:26:14,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 820 transitions. [2023-08-27 01:26:14,642 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.429769392033543 [2023-08-27 01:26:14,643 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 820 transitions. [2023-08-27 01:26:14,643 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 820 transitions. [2023-08-27 01:26:14,643 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:26:14,643 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 820 transitions. [2023-08-27 01:26:14,645 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 136.66666666666666) internal successors, (820), 6 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:14,647 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 318.0) internal successors, (2226), 7 states have internal predecessors, (2226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:14,648 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 318.0) internal successors, (2226), 7 states have internal predecessors, (2226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:14,648 INFO L175 Difference]: Start difference. First operand has 35 places, 29 transitions, 91 flow. Second operand 6 states and 820 transitions. [2023-08-27 01:26:14,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 52 transitions, 251 flow [2023-08-27 01:26:14,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 52 transitions, 250 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 01:26:14,650 INFO L231 Difference]: Finished difference. Result has 40 places, 28 transitions, 103 flow [2023-08-27 01:26:14,650 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=103, PETRI_PLACES=40, PETRI_TRANSITIONS=28} [2023-08-27 01:26:14,653 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, -1 predicate places. [2023-08-27 01:26:14,653 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 28 transitions, 103 flow [2023-08-27 01:26:14,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 131.1818181818182) internal successors, (1443), 11 states have internal predecessors, (1443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:14,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:26:14,654 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:26:14,661 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 01:26:14,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:26:14,860 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-08-27 01:26:14,860 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:26:14,860 INFO L85 PathProgramCache]: Analyzing trace with hash -2081471006, now seen corresponding path program 2 times [2023-08-27 01:26:14,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:26:14,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398593680] [2023-08-27 01:26:14,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:26:14,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:26:15,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:26:16,383 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:26:16,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:26:16,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398593680] [2023-08-27 01:26:16,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398593680] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:26:16,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188395810] [2023-08-27 01:26:16,383 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 01:26:16,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:26:16,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:26:16,385 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 01:26:16,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-27 01:26:16,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-27 01:26:16,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:26:16,555 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 38 conjunts are in the unsatisfiable core [2023-08-27 01:26:16,558 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:26:16,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 01:26:16,711 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-08-27 01:26:16,830 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 01:26:16,830 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 01:26:16,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188395810] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 01:26:16,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 01:26:16,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 18 [2023-08-27 01:26:16,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044863355] [2023-08-27 01:26:16,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 01:26:16,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-27 01:26:16,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:26:16,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-27 01:26:16,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2023-08-27 01:26:16,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 318 [2023-08-27 01:26:16,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 28 transitions, 103 flow. Second operand has 10 states, 10 states have (on average 112.0) internal successors, (1120), 10 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:16,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:26:16,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 318 [2023-08-27 01:26:16,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:26:17,143 INFO L124 PetriNetUnfolderBase]: 171/292 cut-off events. [2023-08-27 01:26:17,143 INFO L125 PetriNetUnfolderBase]: For 405/405 co-relation queries the response was YES. [2023-08-27 01:26:17,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 876 conditions, 292 events. 171/292 cut-off events. For 405/405 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 858 event pairs, 32 based on Foata normal form. 25/317 useless extension candidates. Maximal degree in co-relation 862. Up to 137 conditions per place. [2023-08-27 01:26:17,145 INFO L140 encePairwiseOnDemand]: 307/318 looper letters, 54 selfloop transitions, 13 changer transitions 13/80 dead transitions. [2023-08-27 01:26:17,145 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 80 transitions, 424 flow [2023-08-27 01:26:17,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-27 01:26:17,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-27 01:26:17,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 959 transitions. [2023-08-27 01:26:17,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37696540880503143 [2023-08-27 01:26:17,148 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 959 transitions. [2023-08-27 01:26:17,148 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 959 transitions. [2023-08-27 01:26:17,149 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:26:17,149 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 959 transitions. [2023-08-27 01:26:17,151 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 119.875) internal successors, (959), 8 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:17,154 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 318.0) internal successors, (2862), 9 states have internal predecessors, (2862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:17,154 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 318.0) internal successors, (2862), 9 states have internal predecessors, (2862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:17,154 INFO L175 Difference]: Start difference. First operand has 40 places, 28 transitions, 103 flow. Second operand 8 states and 959 transitions. [2023-08-27 01:26:17,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 80 transitions, 424 flow [2023-08-27 01:26:17,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 80 transitions, 378 flow, removed 20 selfloop flow, removed 5 redundant places. [2023-08-27 01:26:17,157 INFO L231 Difference]: Finished difference. Result has 46 places, 40 transitions, 194 flow [2023-08-27 01:26:17,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=85, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=194, PETRI_PLACES=46, PETRI_TRANSITIONS=40} [2023-08-27 01:26:17,158 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 5 predicate places. [2023-08-27 01:26:17,158 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 40 transitions, 194 flow [2023-08-27 01:26:17,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 112.0) internal successors, (1120), 10 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:17,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:26:17,159 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:26:17,168 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-27 01:26:17,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:26:17,359 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-08-27 01:26:17,360 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:26:17,360 INFO L85 PathProgramCache]: Analyzing trace with hash 159448214, now seen corresponding path program 3 times [2023-08-27 01:26:17,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:26:17,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382630140] [2023-08-27 01:26:17,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:26:17,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:26:17,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:26:19,204 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:26:19,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:26:19,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382630140] [2023-08-27 01:26:19,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382630140] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:26:19,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609770978] [2023-08-27 01:26:19,205 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 01:26:19,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:26:19,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:26:19,206 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 01:26:19,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-27 01:26:19,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-08-27 01:26:19,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:26:19,371 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-27 01:26:19,373 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:26:19,567 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 01:26:19,567 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 01:26:19,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609770978] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 01:26:19,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 01:26:19,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 17 [2023-08-27 01:26:19,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075571775] [2023-08-27 01:26:19,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 01:26:19,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-27 01:26:19,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:26:19,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-27 01:26:19,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2023-08-27 01:26:19,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 318 [2023-08-27 01:26:19,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 40 transitions, 194 flow. Second operand has 8 states, 8 states have (on average 119.5) internal successors, (956), 8 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:19,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:26:19,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 318 [2023-08-27 01:26:19,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:26:19,857 INFO L124 PetriNetUnfolderBase]: 247/406 cut-off events. [2023-08-27 01:26:19,858 INFO L125 PetriNetUnfolderBase]: For 866/866 co-relation queries the response was YES. [2023-08-27 01:26:19,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1505 conditions, 406 events. 247/406 cut-off events. For 866/866 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1284 event pairs, 53 based on Foata normal form. 5/411 useless extension candidates. Maximal degree in co-relation 1491. Up to 215 conditions per place. [2023-08-27 01:26:19,860 INFO L140 encePairwiseOnDemand]: 308/318 looper letters, 56 selfloop transitions, 21 changer transitions 13/90 dead transitions. [2023-08-27 01:26:19,860 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 90 transitions, 581 flow [2023-08-27 01:26:19,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-27 01:26:19,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-27 01:26:19,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1010 transitions. [2023-08-27 01:26:19,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3970125786163522 [2023-08-27 01:26:19,864 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1010 transitions. [2023-08-27 01:26:19,864 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1010 transitions. [2023-08-27 01:26:19,865 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:26:19,865 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1010 transitions. [2023-08-27 01:26:19,867 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 126.25) internal successors, (1010), 8 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:19,870 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 318.0) internal successors, (2862), 9 states have internal predecessors, (2862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:19,871 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 318.0) internal successors, (2862), 9 states have internal predecessors, (2862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:19,871 INFO L175 Difference]: Start difference. First operand has 46 places, 40 transitions, 194 flow. Second operand 8 states and 1010 transitions. [2023-08-27 01:26:19,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 90 transitions, 581 flow [2023-08-27 01:26:19,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 90 transitions, 545 flow, removed 18 selfloop flow, removed 1 redundant places. [2023-08-27 01:26:19,876 INFO L231 Difference]: Finished difference. Result has 57 places, 57 transitions, 354 flow [2023-08-27 01:26:19,876 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=354, PETRI_PLACES=57, PETRI_TRANSITIONS=57} [2023-08-27 01:26:19,876 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 16 predicate places. [2023-08-27 01:26:19,877 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 57 transitions, 354 flow [2023-08-27 01:26:19,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 119.5) internal successors, (956), 8 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:19,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:26:19,877 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:26:19,891 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-27 01:26:20,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:26:20,089 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-08-27 01:26:20,089 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:26:20,089 INFO L85 PathProgramCache]: Analyzing trace with hash 1289788470, now seen corresponding path program 4 times [2023-08-27 01:26:20,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:26:20,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399175959] [2023-08-27 01:26:20,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:26:20,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:26:20,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:26:21,163 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:26:21,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:26:21,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399175959] [2023-08-27 01:26:21,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399175959] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:26:21,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455122558] [2023-08-27 01:26:21,164 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 01:26:21,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:26:21,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:26:21,165 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 01:26:21,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-27 01:26:21,288 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 01:26:21,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:26:21,290 INFO L262 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 42 conjunts are in the unsatisfiable core [2023-08-27 01:26:21,293 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:26:21,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 01:26:21,705 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 33 [2023-08-27 01:26:21,831 INFO L322 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2023-08-27 01:26:21,831 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 85 treesize of output 41 [2023-08-27 01:26:21,867 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:26:21,867 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:26:22,238 INFO L322 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-27 01:26:22,238 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 84 treesize of output 87 [2023-08-27 01:26:22,250 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:26:22,251 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 20 treesize of output 7 [2023-08-27 01:26:23,068 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:26:23,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455122558] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:26:23,069 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:26:23,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2023-08-27 01:26:23,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074613043] [2023-08-27 01:26:23,069 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:26:23,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-27 01:26:23,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:26:23,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-27 01:26:23,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=874, Unknown=1, NotChecked=0, Total=992 [2023-08-27 01:26:23,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 318 [2023-08-27 01:26:23,075 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 57 transitions, 354 flow. Second operand has 32 states, 32 states have (on average 98.96875) internal successors, (3167), 32 states have internal predecessors, (3167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:23,075 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:26:23,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 318 [2023-08-27 01:26:23,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:26:27,492 INFO L124 PetriNetUnfolderBase]: 599/1063 cut-off events. [2023-08-27 01:26:27,492 INFO L125 PetriNetUnfolderBase]: For 4253/4253 co-relation queries the response was YES. [2023-08-27 01:26:27,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4619 conditions, 1063 events. 599/1063 cut-off events. For 4253/4253 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 4996 event pairs, 119 based on Foata normal form. 1/1064 useless extension candidates. Maximal degree in co-relation 4594. Up to 391 conditions per place. [2023-08-27 01:26:27,501 INFO L140 encePairwiseOnDemand]: 306/318 looper letters, 203 selfloop transitions, 57 changer transitions 15/275 dead transitions. [2023-08-27 01:26:27,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 275 transitions, 1964 flow [2023-08-27 01:26:27,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-27 01:26:27,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-27 01:26:27,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2840 transitions. [2023-08-27 01:26:27,510 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33077102259492197 [2023-08-27 01:26:27,510 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2840 transitions. [2023-08-27 01:26:27,510 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2840 transitions. [2023-08-27 01:26:27,511 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:26:27,511 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2840 transitions. [2023-08-27 01:26:27,517 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 105.18518518518519) internal successors, (2840), 27 states have internal predecessors, (2840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:27,528 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 318.0) internal successors, (8904), 28 states have internal predecessors, (8904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:27,530 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 318.0) internal successors, (8904), 28 states have internal predecessors, (8904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:27,530 INFO L175 Difference]: Start difference. First operand has 57 places, 57 transitions, 354 flow. Second operand 27 states and 2840 transitions. [2023-08-27 01:26:27,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 275 transitions, 1964 flow [2023-08-27 01:26:27,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 275 transitions, 1894 flow, removed 35 selfloop flow, removed 1 redundant places. [2023-08-27 01:26:27,543 INFO L231 Difference]: Finished difference. Result has 92 places, 111 transitions, 1058 flow [2023-08-27 01:26:27,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=334, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=1058, PETRI_PLACES=92, PETRI_TRANSITIONS=111} [2023-08-27 01:26:27,543 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 51 predicate places. [2023-08-27 01:26:27,543 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 111 transitions, 1058 flow [2023-08-27 01:26:27,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 98.96875) internal successors, (3167), 32 states have internal predecessors, (3167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:27,545 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:26:27,545 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:26:27,573 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-08-27 01:26:27,750 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,SelfDestructingSolverStorable10 [2023-08-27 01:26:27,751 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-08-27 01:26:27,751 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:26:27,751 INFO L85 PathProgramCache]: Analyzing trace with hash 1850932440, now seen corresponding path program 5 times [2023-08-27 01:26:27,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:26:27,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432651919] [2023-08-27 01:26:27,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:26:27,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:26:27,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:26:29,349 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:26:29,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:26:29,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432651919] [2023-08-27 01:26:29,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432651919] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:26:29,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182490319] [2023-08-27 01:26:29,349 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-27 01:26:29,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:26:29,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:26:29,351 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 01:26:29,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-27 01:26:29,471 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 01:26:29,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:26:29,473 INFO L262 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 37 conjunts are in the unsatisfiable core [2023-08-27 01:26:29,475 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:26:29,842 INFO L322 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2023-08-27 01:26:29,842 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 85 treesize of output 41 [2023-08-27 01:26:29,871 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:26:29,871 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:26:30,081 INFO L322 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-27 01:26:30,081 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 57 treesize of output 60 [2023-08-27 01:26:30,815 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:26:30,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182490319] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:26:30,816 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:26:30,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 29 [2023-08-27 01:26:30,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821038741] [2023-08-27 01:26:30,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:26:30,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-08-27 01:26:30,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:26:30,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-08-27 01:26:30,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=809, Unknown=0, NotChecked=0, Total=930 [2023-08-27 01:26:30,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 318 [2023-08-27 01:26:30,823 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 111 transitions, 1058 flow. Second operand has 31 states, 31 states have (on average 93.03225806451613) internal successors, (2884), 31 states have internal predecessors, (2884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:30,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:26:30,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 318 [2023-08-27 01:26:30,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:26:36,722 INFO L124 PetriNetUnfolderBase]: 833/1567 cut-off events. [2023-08-27 01:26:36,723 INFO L125 PetriNetUnfolderBase]: For 14066/14066 co-relation queries the response was YES. [2023-08-27 01:26:36,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8552 conditions, 1567 events. 833/1567 cut-off events. For 14066/14066 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 8798 event pairs, 140 based on Foata normal form. 4/1571 useless extension candidates. Maximal degree in co-relation 8515. Up to 391 conditions per place. [2023-08-27 01:26:36,738 INFO L140 encePairwiseOnDemand]: 304/318 looper letters, 215 selfloop transitions, 107 changer transitions 53/375 dead transitions. [2023-08-27 01:26:36,738 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 375 transitions, 3431 flow [2023-08-27 01:26:36,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-08-27 01:26:36,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-08-27 01:26:36,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 3388 transitions. [2023-08-27 01:26:36,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3133555308916019 [2023-08-27 01:26:36,749 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 3388 transitions. [2023-08-27 01:26:36,749 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 3388 transitions. [2023-08-27 01:26:36,751 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:26:36,751 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 3388 transitions. [2023-08-27 01:26:36,758 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 99.6470588235294) internal successors, (3388), 34 states have internal predecessors, (3388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:36,774 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 318.0) internal successors, (11130), 35 states have internal predecessors, (11130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:36,776 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 318.0) internal successors, (11130), 35 states have internal predecessors, (11130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:36,776 INFO L175 Difference]: Start difference. First operand has 92 places, 111 transitions, 1058 flow. Second operand 34 states and 3388 transitions. [2023-08-27 01:26:36,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 375 transitions, 3431 flow [2023-08-27 01:26:36,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 375 transitions, 2992 flow, removed 216 selfloop flow, removed 5 redundant places. [2023-08-27 01:26:36,820 INFO L231 Difference]: Finished difference. Result has 139 places, 179 transitions, 1952 flow [2023-08-27 01:26:36,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=883, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=1952, PETRI_PLACES=139, PETRI_TRANSITIONS=179} [2023-08-27 01:26:36,820 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 98 predicate places. [2023-08-27 01:26:36,820 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 179 transitions, 1952 flow [2023-08-27 01:26:36,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 93.03225806451613) internal successors, (2884), 31 states have internal predecessors, (2884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:36,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:26:36,822 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:26:36,831 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-27 01:26:37,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:26:37,031 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-08-27 01:26:37,032 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:26:37,032 INFO L85 PathProgramCache]: Analyzing trace with hash -345065810, now seen corresponding path program 6 times [2023-08-27 01:26:37,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:26:37,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932477440] [2023-08-27 01:26:37,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:26:37,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:26:37,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:26:37,134 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 01:26:37,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:26:37,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932477440] [2023-08-27 01:26:37,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932477440] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 01:26:37,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 01:26:37,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-27 01:26:37,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657821399] [2023-08-27 01:26:37,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 01:26:37,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 01:26:37,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:26:37,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 01:26:37,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-27 01:26:37,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 318 [2023-08-27 01:26:37,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 179 transitions, 1952 flow. Second operand has 4 states, 4 states have (on average 140.0) internal successors, (560), 4 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 01:26:37,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:26:37,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 318 [2023-08-27 01:26:37,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:26:37,373 INFO L124 PetriNetUnfolderBase]: 634/1141 cut-off events. [2023-08-27 01:26:37,373 INFO L125 PetriNetUnfolderBase]: For 13594/13594 co-relation queries the response was YES. [2023-08-27 01:26:37,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6817 conditions, 1141 events. 634/1141 cut-off events. For 13594/13594 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 5585 event pairs, 123 based on Foata normal form. 64/1205 useless extension candidates. Maximal degree in co-relation 6760. Up to 514 conditions per place. [2023-08-27 01:26:37,387 INFO L140 encePairwiseOnDemand]: 314/318 looper letters, 119 selfloop transitions, 44 changer transitions 0/163 dead transitions. [2023-08-27 01:26:37,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 163 transitions, 2062 flow [2023-08-27 01:26:37,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 01:26:37,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 01:26:37,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 579 transitions. [2023-08-27 01:26:37,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.455188679245283 [2023-08-27 01:26:37,389 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 579 transitions. [2023-08-27 01:26:37,389 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 579 transitions. [2023-08-27 01:26:37,390 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:26:37,390 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 579 transitions. [2023-08-27 01:26:37,391 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 144.75) internal successors, (579), 4 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:37,392 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 318.0) internal successors, (1590), 5 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:37,393 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 318.0) internal successors, (1590), 5 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:37,393 INFO L175 Difference]: Start difference. First operand has 139 places, 179 transitions, 1952 flow. Second operand 4 states and 579 transitions. [2023-08-27 01:26:37,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 163 transitions, 2062 flow [2023-08-27 01:26:37,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 163 transitions, 1762 flow, removed 140 selfloop flow, removed 13 redundant places. [2023-08-27 01:26:37,438 INFO L231 Difference]: Finished difference. Result has 111 places, 148 transitions, 1487 flow [2023-08-27 01:26:37,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=1346, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1487, PETRI_PLACES=111, PETRI_TRANSITIONS=148} [2023-08-27 01:26:37,440 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 70 predicate places. [2023-08-27 01:26:37,440 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 148 transitions, 1487 flow [2023-08-27 01:26:37,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 140.0) internal successors, (560), 4 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 01:26:37,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:26:37,440 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:26:37,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-27 01:26:37,441 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-08-27 01:26:37,441 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:26:37,441 INFO L85 PathProgramCache]: Analyzing trace with hash 1868730978, now seen corresponding path program 7 times [2023-08-27 01:26:37,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:26:37,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953558255] [2023-08-27 01:26:37,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:26:37,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:26:37,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:26:38,607 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:26:38,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:26:38,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953558255] [2023-08-27 01:26:38,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953558255] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:26:38,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518373735] [2023-08-27 01:26:38,608 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-27 01:26:38,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:26:38,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:26:38,613 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 01:26:38,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-27 01:26:38,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:26:38,757 INFO L262 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 37 conjunts are in the unsatisfiable core [2023-08-27 01:26:38,758 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:26:39,081 INFO L322 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2023-08-27 01:26:39,081 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 85 treesize of output 41 [2023-08-27 01:26:39,120 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:26:39,120 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:26:39,377 INFO L322 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-27 01:26:39,378 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 55 treesize of output 58 [2023-08-27 01:26:39,887 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:26:39,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518373735] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:26:39,887 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:26:39,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 28 [2023-08-27 01:26:39,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181901829] [2023-08-27 01:26:39,888 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:26:39,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-27 01:26:39,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:26:39,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-27 01:26:39,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=757, Unknown=0, NotChecked=0, Total=870 [2023-08-27 01:26:39,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 318 [2023-08-27 01:26:39,895 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 148 transitions, 1487 flow. Second operand has 30 states, 30 states have (on average 103.1) internal successors, (3093), 30 states have internal predecessors, (3093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:39,895 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:26:39,895 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 318 [2023-08-27 01:26:39,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:26:42,015 INFO L124 PetriNetUnfolderBase]: 790/1526 cut-off events. [2023-08-27 01:26:42,015 INFO L125 PetriNetUnfolderBase]: For 10513/10513 co-relation queries the response was YES. [2023-08-27 01:26:42,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8207 conditions, 1526 events. 790/1526 cut-off events. For 10513/10513 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 8802 event pairs, 110 based on Foata normal form. 1/1527 useless extension candidates. Maximal degree in co-relation 8158. Up to 353 conditions per place. [2023-08-27 01:26:42,026 INFO L140 encePairwiseOnDemand]: 304/318 looper letters, 173 selfloop transitions, 122 changer transitions 13/308 dead transitions. [2023-08-27 01:26:42,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 308 transitions, 3112 flow [2023-08-27 01:26:42,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-27 01:26:42,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-27 01:26:42,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2401 transitions. [2023-08-27 01:26:42,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3431961120640366 [2023-08-27 01:26:42,031 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2401 transitions. [2023-08-27 01:26:42,031 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2401 transitions. [2023-08-27 01:26:42,032 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:26:42,032 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2401 transitions. [2023-08-27 01:26:42,036 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 109.13636363636364) internal successors, (2401), 22 states have internal predecessors, (2401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:42,042 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 318.0) internal successors, (7314), 23 states have internal predecessors, (7314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:42,043 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 318.0) internal successors, (7314), 23 states have internal predecessors, (7314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:42,043 INFO L175 Difference]: Start difference. First operand has 111 places, 148 transitions, 1487 flow. Second operand 22 states and 2401 transitions. [2023-08-27 01:26:42,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 308 transitions, 3112 flow [2023-08-27 01:26:42,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 308 transitions, 2994 flow, removed 15 selfloop flow, removed 5 redundant places. [2023-08-27 01:26:42,088 INFO L231 Difference]: Finished difference. Result has 134 places, 200 transitions, 2334 flow [2023-08-27 01:26:42,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=1407, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=2334, PETRI_PLACES=134, PETRI_TRANSITIONS=200} [2023-08-27 01:26:42,089 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 93 predicate places. [2023-08-27 01:26:42,089 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 200 transitions, 2334 flow [2023-08-27 01:26:42,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 103.1) internal successors, (3093), 30 states have internal predecessors, (3093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:42,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:26:42,090 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:26:42,096 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-27 01:26:42,296 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 01:26:42,296 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-08-27 01:26:42,296 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:26:42,296 INFO L85 PathProgramCache]: Analyzing trace with hash 1427038620, now seen corresponding path program 8 times [2023-08-27 01:26:42,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:26:42,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319345016] [2023-08-27 01:26:42,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:26:42,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:26:42,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:26:43,307 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:26:43,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:26:43,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319345016] [2023-08-27 01:26:43,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319345016] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:26:43,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646831270] [2023-08-27 01:26:43,308 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 01:26:43,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:26:43,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:26:43,309 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 01:26:43,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-27 01:26:43,493 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-27 01:26:43,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:26:43,494 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-27 01:26:43,496 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:26:43,640 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 01:26:43,641 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 01:26:43,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646831270] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 01:26:43,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 01:26:43,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 16 [2023-08-27 01:26:43,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267559249] [2023-08-27 01:26:43,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 01:26:43,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-27 01:26:43,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:26:43,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-27 01:26:43,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2023-08-27 01:26:43,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 318 [2023-08-27 01:26:43,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 200 transitions, 2334 flow. Second operand has 8 states, 8 states have (on average 119.5) internal successors, (956), 8 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:43,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:26:43,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 318 [2023-08-27 01:26:43,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:26:44,072 INFO L124 PetriNetUnfolderBase]: 818/1577 cut-off events. [2023-08-27 01:26:44,072 INFO L125 PetriNetUnfolderBase]: For 12274/12274 co-relation queries the response was YES. [2023-08-27 01:26:44,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9230 conditions, 1577 events. 818/1577 cut-off events. For 12274/12274 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 9052 event pairs, 154 based on Foata normal form. 2/1579 useless extension candidates. Maximal degree in co-relation 9177. Up to 1219 conditions per place. [2023-08-27 01:26:44,096 INFO L140 encePairwiseOnDemand]: 308/318 looper letters, 183 selfloop transitions, 48 changer transitions 14/245 dead transitions. [2023-08-27 01:26:44,096 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 245 transitions, 3126 flow [2023-08-27 01:26:44,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-27 01:26:44,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-27 01:26:44,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1008 transitions. [2023-08-27 01:26:44,098 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39622641509433965 [2023-08-27 01:26:44,098 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1008 transitions. [2023-08-27 01:26:44,098 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1008 transitions. [2023-08-27 01:26:44,099 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:26:44,099 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1008 transitions. [2023-08-27 01:26:44,100 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 126.0) internal successors, (1008), 8 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:44,103 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 318.0) internal successors, (2862), 9 states have internal predecessors, (2862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:44,104 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 318.0) internal successors, (2862), 9 states have internal predecessors, (2862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:44,104 INFO L175 Difference]: Start difference. First operand has 134 places, 200 transitions, 2334 flow. Second operand 8 states and 1008 transitions. [2023-08-27 01:26:44,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 245 transitions, 3126 flow [2023-08-27 01:26:44,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 245 transitions, 2932 flow, removed 89 selfloop flow, removed 5 redundant places. [2023-08-27 01:26:44,171 INFO L231 Difference]: Finished difference. Result has 138 places, 209 transitions, 2384 flow [2023-08-27 01:26:44,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=2152, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2384, PETRI_PLACES=138, PETRI_TRANSITIONS=209} [2023-08-27 01:26:44,171 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 97 predicate places. [2023-08-27 01:26:44,172 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 209 transitions, 2384 flow [2023-08-27 01:26:44,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 119.5) internal successors, (956), 8 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:44,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:26:44,172 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:26:44,181 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-27 01:26:44,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-27 01:26:44,379 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-08-27 01:26:44,379 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:26:44,379 INFO L85 PathProgramCache]: Analyzing trace with hash -1389186426, now seen corresponding path program 9 times [2023-08-27 01:26:44,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:26:44,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827234889] [2023-08-27 01:26:44,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:26:44,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:26:44,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:26:45,848 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:26:45,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:26:45,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827234889] [2023-08-27 01:26:45,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827234889] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:26:45,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910954186] [2023-08-27 01:26:45,848 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 01:26:45,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:26:45,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:26:45,850 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 01:26:45,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-27 01:26:46,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-08-27 01:26:46,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:26:46,048 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-27 01:26:46,049 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:26:46,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 01:26:46,181 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-08-27 01:26:46,300 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 01:26:46,300 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 01:26:46,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910954186] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 01:26:46,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 01:26:46,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11] total 19 [2023-08-27 01:26:46,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958489331] [2023-08-27 01:26:46,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 01:26:46,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-27 01:26:46,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:26:46,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-27 01:26:46,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2023-08-27 01:26:46,302 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 318 [2023-08-27 01:26:46,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 209 transitions, 2384 flow. Second operand has 10 states, 10 states have (on average 112.0) internal successors, (1120), 10 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:46,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:26:46,303 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 318 [2023-08-27 01:26:46,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:26:46,738 INFO L124 PetriNetUnfolderBase]: 840/1630 cut-off events. [2023-08-27 01:26:46,738 INFO L125 PetriNetUnfolderBase]: For 12198/12198 co-relation queries the response was YES. [2023-08-27 01:26:46,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9468 conditions, 1630 events. 840/1630 cut-off events. For 12198/12198 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 9579 event pairs, 150 based on Foata normal form. 2/1632 useless extension candidates. Maximal degree in co-relation 9413. Up to 1161 conditions per place. [2023-08-27 01:26:46,753 INFO L140 encePairwiseOnDemand]: 308/318 looper letters, 189 selfloop transitions, 50 changer transitions 16/255 dead transitions. [2023-08-27 01:26:46,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 255 transitions, 3230 flow [2023-08-27 01:26:46,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-27 01:26:46,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-27 01:26:46,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 947 transitions. [2023-08-27 01:26:46,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37224842767295596 [2023-08-27 01:26:46,755 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 947 transitions. [2023-08-27 01:26:46,755 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 947 transitions. [2023-08-27 01:26:46,755 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:26:46,755 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 947 transitions. [2023-08-27 01:26:46,757 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 118.375) internal successors, (947), 8 states have internal predecessors, (947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:46,759 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 318.0) internal successors, (2862), 9 states have internal predecessors, (2862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:46,759 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 318.0) internal successors, (2862), 9 states have internal predecessors, (2862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:46,760 INFO L175 Difference]: Start difference. First operand has 138 places, 209 transitions, 2384 flow. Second operand 8 states and 947 transitions. [2023-08-27 01:26:46,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 255 transitions, 3230 flow [2023-08-27 01:26:46,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 255 transitions, 3130 flow, removed 12 selfloop flow, removed 5 redundant places. [2023-08-27 01:26:46,809 INFO L231 Difference]: Finished difference. Result has 143 places, 216 transitions, 2515 flow [2023-08-27 01:26:46,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=2285, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2515, PETRI_PLACES=143, PETRI_TRANSITIONS=216} [2023-08-27 01:26:46,809 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 102 predicate places. [2023-08-27 01:26:46,810 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 216 transitions, 2515 flow [2023-08-27 01:26:46,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 112.0) internal successors, (1120), 10 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:46,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:26:46,810 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:26:46,815 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 01:26:47,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-27 01:26:47,012 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-08-27 01:26:47,012 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:26:47,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1444810058, now seen corresponding path program 10 times [2023-08-27 01:26:47,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:26:47,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500583235] [2023-08-27 01:26:47,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:26:47,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:26:47,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:26:47,929 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:26:47,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:26:47,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500583235] [2023-08-27 01:26:47,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500583235] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:26:47,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165241564] [2023-08-27 01:26:47,930 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 01:26:47,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:26:47,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:26:47,933 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 01:26:47,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-27 01:26:48,067 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 01:26:48,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:26:48,070 INFO L262 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-27 01:26:48,072 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:26:48,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 01:26:48,423 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 31 [2023-08-27 01:26:48,550 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:26:48,550 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:26:48,864 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:26:48,864 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 85 treesize of output 87 [2023-08-27 01:26:48,870 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:26:48,870 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 20 treesize of output 7 [2023-08-27 01:26:49,252 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:26:49,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165241564] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:26:49,253 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:26:49,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2023-08-27 01:26:49,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604227164] [2023-08-27 01:26:49,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:26:49,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-27 01:26:49,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:26:49,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-27 01:26:49,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=872, Unknown=1, NotChecked=0, Total=992 [2023-08-27 01:26:49,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 318 [2023-08-27 01:26:49,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 216 transitions, 2515 flow. Second operand has 32 states, 32 states have (on average 98.96875) internal successors, (3167), 32 states have internal predecessors, (3167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:49,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:26:49,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 318 [2023-08-27 01:26:49,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:26:51,852 INFO L124 PetriNetUnfolderBase]: 1081/2012 cut-off events. [2023-08-27 01:26:51,852 INFO L125 PetriNetUnfolderBase]: For 16630/16630 co-relation queries the response was YES. [2023-08-27 01:26:51,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12056 conditions, 2012 events. 1081/2012 cut-off events. For 16630/16630 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 11876 event pairs, 154 based on Foata normal form. 2/2014 useless extension candidates. Maximal degree in co-relation 11998. Up to 483 conditions per place. [2023-08-27 01:26:51,868 INFO L140 encePairwiseOnDemand]: 305/318 looper letters, 227 selfloop transitions, 124 changer transitions 36/387 dead transitions. [2023-08-27 01:26:51,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 387 transitions, 4437 flow [2023-08-27 01:26:51,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-08-27 01:26:51,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-08-27 01:26:51,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 3017 transitions. [2023-08-27 01:26:51,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3271524615050965 [2023-08-27 01:26:51,873 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 3017 transitions. [2023-08-27 01:26:51,873 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 3017 transitions. [2023-08-27 01:26:51,873 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:26:51,873 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 3017 transitions. [2023-08-27 01:26:51,877 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 104.03448275862068) internal successors, (3017), 29 states have internal predecessors, (3017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:51,885 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 318.0) internal successors, (9540), 30 states have internal predecessors, (9540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:51,885 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 318.0) internal successors, (9540), 30 states have internal predecessors, (9540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:51,886 INFO L175 Difference]: Start difference. First operand has 143 places, 216 transitions, 2515 flow. Second operand 29 states and 3017 transitions. [2023-08-27 01:26:51,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 387 transitions, 4437 flow [2023-08-27 01:26:51,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 387 transitions, 4274 flow, removed 36 selfloop flow, removed 4 redundant places. [2023-08-27 01:26:51,964 INFO L231 Difference]: Finished difference. Result has 177 places, 253 transitions, 3195 flow [2023-08-27 01:26:51,964 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=2410, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=3195, PETRI_PLACES=177, PETRI_TRANSITIONS=253} [2023-08-27 01:26:51,964 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 136 predicate places. [2023-08-27 01:26:51,965 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 253 transitions, 3195 flow [2023-08-27 01:26:51,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 98.96875) internal successors, (3167), 32 states have internal predecessors, (3167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:51,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:26:51,965 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:26:51,972 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-27 01:26:52,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-27 01:26:52,172 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-08-27 01:26:52,172 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:26:52,172 INFO L85 PathProgramCache]: Analyzing trace with hash -932914768, now seen corresponding path program 11 times [2023-08-27 01:26:52,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:26:52,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715820448] [2023-08-27 01:26:52,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:26:52,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:26:52,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:26:53,288 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:26:53,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:26:53,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715820448] [2023-08-27 01:26:53,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715820448] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:26:53,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135895324] [2023-08-27 01:26:53,289 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-27 01:26:53,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:26:53,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:26:53,293 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 01:26:53,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-27 01:26:53,425 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 01:26:53,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:26:53,427 INFO L262 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 42 conjunts are in the unsatisfiable core [2023-08-27 01:26:53,429 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:26:53,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 01:26:53,668 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-08-27 01:26:53,810 INFO L322 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2023-08-27 01:26:53,811 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 85 treesize of output 41 [2023-08-27 01:26:53,839 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:26:53,840 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:26:54,153 INFO L322 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-27 01:26:54,154 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 110 treesize of output 113 [2023-08-27 01:26:54,176 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:26:54,176 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 56 [2023-08-27 01:26:55,120 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:26:55,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135895324] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:26:55,120 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:26:55,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2023-08-27 01:26:55,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520235303] [2023-08-27 01:26:55,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:26:55,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-27 01:26:55,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:26:55,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-27 01:26:55,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=869, Unknown=1, NotChecked=0, Total=992 [2023-08-27 01:26:55,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 318 [2023-08-27 01:26:55,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 253 transitions, 3195 flow. Second operand has 32 states, 32 states have (on average 98.96875) internal successors, (3167), 32 states have internal predecessors, (3167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:55,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:26:55,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 318 [2023-08-27 01:26:55,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:26:57,684 INFO L124 PetriNetUnfolderBase]: 1136/2102 cut-off events. [2023-08-27 01:26:57,684 INFO L125 PetriNetUnfolderBase]: For 19861/19861 co-relation queries the response was YES. [2023-08-27 01:26:57,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13306 conditions, 2102 events. 1136/2102 cut-off events. For 19861/19861 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 12409 event pairs, 222 based on Foata normal form. 3/2105 useless extension candidates. Maximal degree in co-relation 13242. Up to 758 conditions per place. [2023-08-27 01:26:57,704 INFO L140 encePairwiseOnDemand]: 305/318 looper letters, 242 selfloop transitions, 98 changer transitions 22/362 dead transitions. [2023-08-27 01:26:57,704 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 362 transitions, 4570 flow [2023-08-27 01:26:57,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-27 01:26:57,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-27 01:26:57,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2006 transitions. [2023-08-27 01:26:57,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33200926845415424 [2023-08-27 01:26:57,707 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2006 transitions. [2023-08-27 01:26:57,707 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2006 transitions. [2023-08-27 01:26:57,708 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:26:57,708 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2006 transitions. [2023-08-27 01:26:57,710 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 105.57894736842105) internal successors, (2006), 19 states have internal predecessors, (2006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:57,714 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 318.0) internal successors, (6360), 20 states have internal predecessors, (6360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:57,715 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 318.0) internal successors, (6360), 20 states have internal predecessors, (6360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:57,715 INFO L175 Difference]: Start difference. First operand has 177 places, 253 transitions, 3195 flow. Second operand 19 states and 2006 transitions. [2023-08-27 01:26:57,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 362 transitions, 4570 flow [2023-08-27 01:26:57,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 362 transitions, 4403 flow, removed 66 selfloop flow, removed 13 redundant places. [2023-08-27 01:26:57,838 INFO L231 Difference]: Finished difference. Result has 181 places, 259 transitions, 3411 flow [2023-08-27 01:26:57,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=3044, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=3411, PETRI_PLACES=181, PETRI_TRANSITIONS=259} [2023-08-27 01:26:57,838 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 140 predicate places. [2023-08-27 01:26:57,839 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 259 transitions, 3411 flow [2023-08-27 01:26:57,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 98.96875) internal successors, (3167), 32 states have internal predecessors, (3167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:57,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:26:57,840 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:26:57,851 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-27 01:26:58,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:26:58,046 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-08-27 01:26:58,046 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:26:58,047 INFO L85 PathProgramCache]: Analyzing trace with hash 743332659, now seen corresponding path program 12 times [2023-08-27 01:26:58,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:26:58,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209866837] [2023-08-27 01:26:58,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:26:58,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:26:58,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:26:59,954 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:26:59,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:26:59,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209866837] [2023-08-27 01:26:59,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209866837] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:26:59,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559915780] [2023-08-27 01:26:59,955 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-27 01:26:59,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:26:59,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:26:59,956 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 01:26:59,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-27 01:27:00,106 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2023-08-27 01:27:00,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:27:00,108 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-27 01:27:00,110 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:27:00,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 01:27:00,296 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 34 [2023-08-27 01:27:00,372 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 01:27:00,372 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 01:27:00,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559915780] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 01:27:00,372 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 01:27:00,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12] total 20 [2023-08-27 01:27:00,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955641406] [2023-08-27 01:27:00,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 01:27:00,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-27 01:27:00,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:27:00,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-27 01:27:00,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2023-08-27 01:27:00,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 318 [2023-08-27 01:27:00,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 259 transitions, 3411 flow. Second operand has 10 states, 10 states have (on average 112.0) internal successors, (1120), 10 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:00,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:27:00,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 318 [2023-08-27 01:27:00,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:27:00,869 INFO L124 PetriNetUnfolderBase]: 1107/2022 cut-off events. [2023-08-27 01:27:00,869 INFO L125 PetriNetUnfolderBase]: For 21712/21712 co-relation queries the response was YES. [2023-08-27 01:27:00,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13360 conditions, 2022 events. 1107/2022 cut-off events. For 21712/21712 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 11636 event pairs, 145 based on Foata normal form. 1/2022 useless extension candidates. Maximal degree in co-relation 13294. Up to 1257 conditions per place. [2023-08-27 01:27:00,886 INFO L140 encePairwiseOnDemand]: 308/318 looper letters, 223 selfloop transitions, 67 changer transitions 16/306 dead transitions. [2023-08-27 01:27:00,886 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 306 transitions, 4371 flow [2023-08-27 01:27:00,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-27 01:27:00,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-27 01:27:00,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 955 transitions. [2023-08-27 01:27:00,898 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3753930817610063 [2023-08-27 01:27:00,898 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 955 transitions. [2023-08-27 01:27:00,898 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 955 transitions. [2023-08-27 01:27:00,899 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:27:00,899 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 955 transitions. [2023-08-27 01:27:00,900 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 119.375) internal successors, (955), 8 states have internal predecessors, (955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:00,902 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 318.0) internal successors, (2862), 9 states have internal predecessors, (2862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:00,902 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 318.0) internal successors, (2862), 9 states have internal predecessors, (2862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:00,902 INFO L175 Difference]: Start difference. First operand has 181 places, 259 transitions, 3411 flow. Second operand 8 states and 955 transitions. [2023-08-27 01:27:00,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 306 transitions, 4371 flow [2023-08-27 01:27:01,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 306 transitions, 4288 flow, removed 19 selfloop flow, removed 6 redundant places. [2023-08-27 01:27:01,013 INFO L231 Difference]: Finished difference. Result has 182 places, 256 transitions, 3438 flow [2023-08-27 01:27:01,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=3330, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3438, PETRI_PLACES=182, PETRI_TRANSITIONS=256} [2023-08-27 01:27:01,013 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 141 predicate places. [2023-08-27 01:27:01,013 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 256 transitions, 3438 flow [2023-08-27 01:27:01,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 112.0) internal successors, (1120), 10 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:01,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:27:01,014 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:27:01,023 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-27 01:27:01,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:27:01,220 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-08-27 01:27:01,220 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:27:01,220 INFO L85 PathProgramCache]: Analyzing trace with hash 221538223, now seen corresponding path program 1 times [2023-08-27 01:27:01,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:27:01,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661944721] [2023-08-27 01:27:01,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:27:01,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:27:01,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:27:01,340 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 01:27:01,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:27:01,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661944721] [2023-08-27 01:27:01,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661944721] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:27:01,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306299615] [2023-08-27 01:27:01,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:27:01,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:27:01,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:27:01,345 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 01:27:01,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-27 01:27:01,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:27:01,492 INFO L262 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-27 01:27:01,497 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:27:01,522 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 01:27:01,522 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:27:01,551 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 01:27:01,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306299615] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-27 01:27:01,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-27 01:27:01,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 6 [2023-08-27 01:27:01,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861231841] [2023-08-27 01:27:01,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 01:27:01,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 01:27:01,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:27:01,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 01:27:01,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-08-27 01:27:01,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 318 [2023-08-27 01:27:01,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 256 transitions, 3438 flow. Second operand has 4 states, 4 states have (on average 140.25) internal successors, (561), 4 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:01,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:27:01,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 318 [2023-08-27 01:27:01,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:27:01,937 INFO L124 PetriNetUnfolderBase]: 1183/2148 cut-off events. [2023-08-27 01:27:01,937 INFO L125 PetriNetUnfolderBase]: For 25822/25822 co-relation queries the response was YES. [2023-08-27 01:27:01,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14562 conditions, 2148 events. 1183/2148 cut-off events. For 25822/25822 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 12398 event pairs, 164 based on Foata normal form. 47/2194 useless extension candidates. Maximal degree in co-relation 14496. Up to 1517 conditions per place. [2023-08-27 01:27:01,957 INFO L140 encePairwiseOnDemand]: 314/318 looper letters, 263 selfloop transitions, 53 changer transitions 0/316 dead transitions. [2023-08-27 01:27:01,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 316 transitions, 4748 flow [2023-08-27 01:27:01,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 01:27:01,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 01:27:01,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 589 transitions. [2023-08-27 01:27:01,959 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4630503144654088 [2023-08-27 01:27:01,959 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 589 transitions. [2023-08-27 01:27:01,959 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 589 transitions. [2023-08-27 01:27:01,959 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:27:01,959 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 589 transitions. [2023-08-27 01:27:01,960 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 147.25) internal successors, (589), 4 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:01,961 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 318.0) internal successors, (1590), 5 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:01,961 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 318.0) internal successors, (1590), 5 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:01,961 INFO L175 Difference]: Start difference. First operand has 182 places, 256 transitions, 3438 flow. Second operand 4 states and 589 transitions. [2023-08-27 01:27:01,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 316 transitions, 4748 flow [2023-08-27 01:27:02,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 316 transitions, 4563 flow, removed 22 selfloop flow, removed 8 redundant places. [2023-08-27 01:27:02,136 INFO L231 Difference]: Finished difference. Result has 177 places, 268 transitions, 3672 flow [2023-08-27 01:27:02,137 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=3213, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=3672, PETRI_PLACES=177, PETRI_TRANSITIONS=268} [2023-08-27 01:27:02,137 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 136 predicate places. [2023-08-27 01:27:02,137 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 268 transitions, 3672 flow [2023-08-27 01:27:02,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 140.25) internal successors, (561), 4 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:02,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:27:02,138 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:27:02,144 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-27 01:27:02,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:27:02,344 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-08-27 01:27:02,345 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:27:02,345 INFO L85 PathProgramCache]: Analyzing trace with hash 1690646045, now seen corresponding path program 13 times [2023-08-27 01:27:02,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:27:02,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404327916] [2023-08-27 01:27:02,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:27:02,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:27:02,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:27:05,044 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:27:05,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:27:05,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404327916] [2023-08-27 01:27:05,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404327916] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:27:05,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956425142] [2023-08-27 01:27:05,045 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-27 01:27:05,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:27:05,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:27:05,046 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 01:27:05,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-27 01:27:05,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:27:05,177 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 35 conjunts are in the unsatisfiable core [2023-08-27 01:27:05,179 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:27:05,416 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 01:27:05,416 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:27:05,563 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:27:05,564 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 60 [2023-08-27 01:27:05,716 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 01:27:05,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956425142] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-27 01:27:05,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-27 01:27:05,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [12, 8] total 25 [2023-08-27 01:27:05,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066792241] [2023-08-27 01:27:05,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 01:27:05,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-27 01:27:05,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:27:05,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-27 01:27:05,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2023-08-27 01:27:05,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 318 [2023-08-27 01:27:05,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 268 transitions, 3672 flow. Second operand has 8 states, 8 states have (on average 119.5) internal successors, (956), 8 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:05,719 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:27:05,719 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 318 [2023-08-27 01:27:05,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:27:06,263 INFO L124 PetriNetUnfolderBase]: 1234/2253 cut-off events. [2023-08-27 01:27:06,263 INFO L125 PetriNetUnfolderBase]: For 28908/28908 co-relation queries the response was YES. [2023-08-27 01:27:06,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15645 conditions, 2253 events. 1234/2253 cut-off events. For 28908/28908 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 13310 event pairs, 162 based on Foata normal form. 1/2253 useless extension candidates. Maximal degree in co-relation 15582. Up to 1377 conditions per place. [2023-08-27 01:27:06,281 INFO L140 encePairwiseOnDemand]: 307/318 looper letters, 221 selfloop transitions, 91 changer transitions 13/325 dead transitions. [2023-08-27 01:27:06,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 325 transitions, 4848 flow [2023-08-27 01:27:06,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-27 01:27:06,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-27 01:27:06,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1012 transitions. [2023-08-27 01:27:06,286 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3977987421383648 [2023-08-27 01:27:06,286 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1012 transitions. [2023-08-27 01:27:06,287 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1012 transitions. [2023-08-27 01:27:06,287 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:27:06,287 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1012 transitions. [2023-08-27 01:27:06,288 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 126.5) internal successors, (1012), 8 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:06,290 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 318.0) internal successors, (2862), 9 states have internal predecessors, (2862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:06,290 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 318.0) internal successors, (2862), 9 states have internal predecessors, (2862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:06,290 INFO L175 Difference]: Start difference. First operand has 177 places, 268 transitions, 3672 flow. Second operand 8 states and 1012 transitions. [2023-08-27 01:27:06,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 325 transitions, 4848 flow [2023-08-27 01:27:06,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 325 transitions, 4804 flow, removed 22 selfloop flow, removed 0 redundant places. [2023-08-27 01:27:06,426 INFO L231 Difference]: Finished difference. Result has 189 places, 286 transitions, 4202 flow [2023-08-27 01:27:06,426 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=3646, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4202, PETRI_PLACES=189, PETRI_TRANSITIONS=286} [2023-08-27 01:27:06,427 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 148 predicate places. [2023-08-27 01:27:06,427 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 286 transitions, 4202 flow [2023-08-27 01:27:06,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 119.5) internal successors, (956), 8 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:06,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:27:06,427 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:27:06,433 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-27 01:27:06,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:27:06,633 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-08-27 01:27:06,633 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:27:06,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1344572633, now seen corresponding path program 14 times [2023-08-27 01:27:06,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:27:06,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047957231] [2023-08-27 01:27:06,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:27:06,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:27:06,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:27:08,976 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:27:08,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:27:08,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047957231] [2023-08-27 01:27:08,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047957231] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:27:08,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135207378] [2023-08-27 01:27:08,977 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 01:27:08,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:27:08,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:27:08,978 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 01:27:08,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-27 01:27:09,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-27 01:27:09,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:27:09,111 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 31 conjunts are in the unsatisfiable core [2023-08-27 01:27:09,113 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:27:09,270 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 01:27:09,270 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 01:27:09,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135207378] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 01:27:09,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 01:27:09,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [12] total 18 [2023-08-27 01:27:09,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301815228] [2023-08-27 01:27:09,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 01:27:09,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-27 01:27:09,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:27:09,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-27 01:27:09,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2023-08-27 01:27:09,271 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 318 [2023-08-27 01:27:09,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 286 transitions, 4202 flow. Second operand has 8 states, 8 states have (on average 119.5) internal successors, (956), 8 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:09,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:27:09,272 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 318 [2023-08-27 01:27:09,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:27:09,761 INFO L124 PetriNetUnfolderBase]: 1254/2293 cut-off events. [2023-08-27 01:27:09,761 INFO L125 PetriNetUnfolderBase]: For 30202/30202 co-relation queries the response was YES. [2023-08-27 01:27:09,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16589 conditions, 2293 events. 1254/2293 cut-off events. For 30202/30202 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 13578 event pairs, 213 based on Foata normal form. 1/2293 useless extension candidates. Maximal degree in co-relation 16519. Up to 1771 conditions per place. [2023-08-27 01:27:09,781 INFO L140 encePairwiseOnDemand]: 308/318 looper letters, 251 selfloop transitions, 69 changer transitions 13/333 dead transitions. [2023-08-27 01:27:09,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 333 transitions, 5311 flow [2023-08-27 01:27:09,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-27 01:27:09,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-27 01:27:09,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1010 transitions. [2023-08-27 01:27:09,784 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3970125786163522 [2023-08-27 01:27:09,784 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1010 transitions. [2023-08-27 01:27:09,784 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1010 transitions. [2023-08-27 01:27:09,785 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:27:09,785 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1010 transitions. [2023-08-27 01:27:09,786 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 126.25) internal successors, (1010), 8 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:09,787 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 318.0) internal successors, (2862), 9 states have internal predecessors, (2862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:09,787 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 318.0) internal successors, (2862), 9 states have internal predecessors, (2862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:09,787 INFO L175 Difference]: Start difference. First operand has 189 places, 286 transitions, 4202 flow. Second operand 8 states and 1010 transitions. [2023-08-27 01:27:09,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 333 transitions, 5311 flow [2023-08-27 01:27:09,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 333 transitions, 5162 flow, removed 18 selfloop flow, removed 4 redundant places. [2023-08-27 01:27:09,895 INFO L231 Difference]: Finished difference. Result has 194 places, 299 transitions, 4470 flow [2023-08-27 01:27:09,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=4064, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4470, PETRI_PLACES=194, PETRI_TRANSITIONS=299} [2023-08-27 01:27:09,896 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 153 predicate places. [2023-08-27 01:27:09,896 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 299 transitions, 4470 flow [2023-08-27 01:27:09,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 119.5) internal successors, (956), 8 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:09,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:27:09,896 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:27:09,902 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-08-27 01:27:10,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:27:10,097 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-08-27 01:27:10,097 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:27:10,097 INFO L85 PathProgramCache]: Analyzing trace with hash 178884249, now seen corresponding path program 15 times [2023-08-27 01:27:10,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:27:10,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446586549] [2023-08-27 01:27:10,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:27:10,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:27:10,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:27:13,112 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:27:13,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:27:13,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446586549] [2023-08-27 01:27:13,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446586549] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:27:13,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270678770] [2023-08-27 01:27:13,112 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 01:27:13,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:27:13,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:27:13,113 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 01:27:13,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-27 01:27:13,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-08-27 01:27:13,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:27:13,257 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-27 01:27:13,258 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:27:13,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 01:27:13,450 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 34 [2023-08-27 01:27:13,522 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 01:27:13,523 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 01:27:13,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270678770] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 01:27:13,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 01:27:13,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12] total 20 [2023-08-27 01:27:13,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74173248] [2023-08-27 01:27:13,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 01:27:13,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-27 01:27:13,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:27:13,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-27 01:27:13,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2023-08-27 01:27:13,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 318 [2023-08-27 01:27:13,525 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 299 transitions, 4470 flow. Second operand has 10 states, 10 states have (on average 112.0) internal successors, (1120), 10 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:13,525 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:27:13,525 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 318 [2023-08-27 01:27:13,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:27:14,130 INFO L124 PetriNetUnfolderBase]: 1277/2337 cut-off events. [2023-08-27 01:27:14,130 INFO L125 PetriNetUnfolderBase]: For 32119/32119 co-relation queries the response was YES. [2023-08-27 01:27:14,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17079 conditions, 2337 events. 1277/2337 cut-off events. For 32119/32119 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 13923 event pairs, 213 based on Foata normal form. 1/2337 useless extension candidates. Maximal degree in co-relation 17007. Up to 1760 conditions per place. [2023-08-27 01:27:14,146 INFO L140 encePairwiseOnDemand]: 309/318 looper letters, 258 selfloop transitions, 62 changer transitions 17/337 dead transitions. [2023-08-27 01:27:14,146 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 337 transitions, 5463 flow [2023-08-27 01:27:14,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-27 01:27:14,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-27 01:27:14,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 954 transitions. [2023-08-27 01:27:14,149 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2023-08-27 01:27:14,149 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 954 transitions. [2023-08-27 01:27:14,149 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 954 transitions. [2023-08-27 01:27:14,149 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:27:14,149 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 954 transitions. [2023-08-27 01:27:14,150 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 119.25) internal successors, (954), 8 states have internal predecessors, (954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:14,152 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 318.0) internal successors, (2862), 9 states have internal predecessors, (2862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:14,152 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 318.0) internal successors, (2862), 9 states have internal predecessors, (2862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:14,152 INFO L175 Difference]: Start difference. First operand has 194 places, 299 transitions, 4470 flow. Second operand 8 states and 954 transitions. [2023-08-27 01:27:14,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 337 transitions, 5463 flow [2023-08-27 01:27:14,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 337 transitions, 5301 flow, removed 26 selfloop flow, removed 5 redundant places. [2023-08-27 01:27:14,247 INFO L231 Difference]: Finished difference. Result has 198 places, 299 transitions, 4480 flow [2023-08-27 01:27:14,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=4318, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4480, PETRI_PLACES=198, PETRI_TRANSITIONS=299} [2023-08-27 01:27:14,248 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 157 predicate places. [2023-08-27 01:27:14,248 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 299 transitions, 4480 flow [2023-08-27 01:27:14,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 112.0) internal successors, (1120), 10 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:14,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:27:14,248 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:27:14,254 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-08-27 01:27:14,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:27:14,452 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-08-27 01:27:14,452 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:27:14,452 INFO L85 PathProgramCache]: Analyzing trace with hash 359634291, now seen corresponding path program 16 times [2023-08-27 01:27:14,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:27:14,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072794939] [2023-08-27 01:27:14,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:27:14,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:27:14,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:27:15,718 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:27:15,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:27:15,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072794939] [2023-08-27 01:27:15,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072794939] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:27:15,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737282026] [2023-08-27 01:27:15,718 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 01:27:15,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:27:15,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:27:15,720 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 01:27:15,722 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-27 01:27:15,840 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 01:27:15,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:27:15,841 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 40 conjunts are in the unsatisfiable core [2023-08-27 01:27:15,843 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:27:15,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 01:27:15,999 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-08-27 01:27:16,083 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 01:27:16,083 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:27:16,185 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1025 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1025) c_~queue~0.base))) (or (let ((.cse1 (* c_~start~0 4))) (= (mod (select .cse0 (+ .cse1 c_~queue~0.offset 4)) 4294967296) (mod (select .cse0 (+ .cse1 c_~queue~0.offset)) 4294967296))) (not (= (mod (select .cse0 (+ (* c_~end~0 4) c_~queue~0.offset)) 4294967296) (mod |c_thread1Thread1of1ForFork1_~x~0#1| 4294967296)))))) is different from false [2023-08-27 01:27:16,217 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:27:16,217 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 112 treesize of output 114 [2023-08-27 01:27:16,235 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:27:16,236 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 56 [2023-08-27 01:27:16,496 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 01:27:16,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737282026] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-27 01:27:16,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-27 01:27:16,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11, 10] total 29 [2023-08-27 01:27:16,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373955350] [2023-08-27 01:27:16,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 01:27:16,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-27 01:27:16,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:27:16,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-27 01:27:16,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=776, Unknown=1, NotChecked=56, Total=930 [2023-08-27 01:27:16,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 318 [2023-08-27 01:27:16,499 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 299 transitions, 4480 flow. Second operand has 10 states, 10 states have (on average 112.0) internal successors, (1120), 10 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:16,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:27:16,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 318 [2023-08-27 01:27:16,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:27:17,185 INFO L124 PetriNetUnfolderBase]: 1268/2326 cut-off events. [2023-08-27 01:27:17,186 INFO L125 PetriNetUnfolderBase]: For 31739/31739 co-relation queries the response was YES. [2023-08-27 01:27:17,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16983 conditions, 2326 events. 1268/2326 cut-off events. For 31739/31739 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 13939 event pairs, 177 based on Foata normal form. 1/2326 useless extension candidates. Maximal degree in co-relation 16909. Up to 1427 conditions per place. [2023-08-27 01:27:17,206 INFO L140 encePairwiseOnDemand]: 305/318 looper letters, 229 selfloop transitions, 100 changer transitions 16/345 dead transitions. [2023-08-27 01:27:17,206 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 345 transitions, 5561 flow [2023-08-27 01:27:17,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-27 01:27:17,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-27 01:27:17,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1071 transitions. [2023-08-27 01:27:17,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3742138364779874 [2023-08-27 01:27:17,208 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1071 transitions. [2023-08-27 01:27:17,208 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1071 transitions. [2023-08-27 01:27:17,208 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:27:17,208 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1071 transitions. [2023-08-27 01:27:17,209 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 119.0) internal successors, (1071), 9 states have internal predecessors, (1071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:17,210 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 318.0) internal successors, (3180), 10 states have internal predecessors, (3180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:17,210 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 318.0) internal successors, (3180), 10 states have internal predecessors, (3180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:17,211 INFO L175 Difference]: Start difference. First operand has 198 places, 299 transitions, 4480 flow. Second operand 9 states and 1071 transitions. [2023-08-27 01:27:17,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 345 transitions, 5561 flow [2023-08-27 01:27:17,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 345 transitions, 5423 flow, removed 15 selfloop flow, removed 7 redundant places. [2023-08-27 01:27:17,322 INFO L231 Difference]: Finished difference. Result has 200 places, 304 transitions, 4704 flow [2023-08-27 01:27:17,322 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=4355, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4704, PETRI_PLACES=200, PETRI_TRANSITIONS=304} [2023-08-27 01:27:17,323 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 159 predicate places. [2023-08-27 01:27:17,323 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 304 transitions, 4704 flow [2023-08-27 01:27:17,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 112.0) internal successors, (1120), 10 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:17,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:27:17,323 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:27:17,328 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-08-27 01:27:17,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-08-27 01:27:17,524 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-08-27 01:27:17,524 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:27:17,524 INFO L85 PathProgramCache]: Analyzing trace with hash -1747149829, now seen corresponding path program 17 times [2023-08-27 01:27:17,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:27:17,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101871767] [2023-08-27 01:27:17,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:27:17,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:27:17,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:27:18,917 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:27:18,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:27:18,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101871767] [2023-08-27 01:27:18,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101871767] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:27:18,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216978757] [2023-08-27 01:27:18,917 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-27 01:27:18,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:27:18,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:27:18,918 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 01:27:18,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-08-27 01:27:19,040 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-27 01:27:19,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:27:19,041 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 40 conjunts are in the unsatisfiable core [2023-08-27 01:27:19,042 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:27:19,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 01:27:19,270 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 34 [2023-08-27 01:27:19,338 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 01:27:19,338 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:27:19,537 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:27:19,537 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 87 treesize of output 89 [2023-08-27 01:27:19,541 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:27:19,541 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 20 treesize of output 7 [2023-08-27 01:27:19,750 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 01:27:19,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216978757] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-27 01:27:19,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-27 01:27:19,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12, 10] total 30 [2023-08-27 01:27:19,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581346488] [2023-08-27 01:27:19,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 01:27:19,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-27 01:27:19,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:27:19,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-27 01:27:19,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=892, Unknown=3, NotChecked=0, Total=992 [2023-08-27 01:27:19,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 318 [2023-08-27 01:27:19,753 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 304 transitions, 4704 flow. Second operand has 10 states, 10 states have (on average 112.0) internal successors, (1120), 10 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:19,753 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:27:19,753 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 318 [2023-08-27 01:27:19,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:27:20,486 INFO L124 PetriNetUnfolderBase]: 1261/2319 cut-off events. [2023-08-27 01:27:20,487 INFO L125 PetriNetUnfolderBase]: For 32406/32406 co-relation queries the response was YES. [2023-08-27 01:27:20,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17484 conditions, 2319 events. 1261/2319 cut-off events. For 32406/32406 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 13917 event pairs, 174 based on Foata normal form. 1/2319 useless extension candidates. Maximal degree in co-relation 17409. Up to 1433 conditions per place. [2023-08-27 01:27:20,506 INFO L140 encePairwiseOnDemand]: 307/318 looper letters, 233 selfloop transitions, 93 changer transitions 22/348 dead transitions. [2023-08-27 01:27:20,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 348 transitions, 5703 flow [2023-08-27 01:27:20,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-27 01:27:20,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-27 01:27:20,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1072 transitions. [2023-08-27 01:27:20,508 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3745632424877708 [2023-08-27 01:27:20,508 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1072 transitions. [2023-08-27 01:27:20,508 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1072 transitions. [2023-08-27 01:27:20,508 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:27:20,508 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1072 transitions. [2023-08-27 01:27:20,509 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 119.11111111111111) internal successors, (1072), 9 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:20,510 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 318.0) internal successors, (3180), 10 states have internal predecessors, (3180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:20,510 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 318.0) internal successors, (3180), 10 states have internal predecessors, (3180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:20,511 INFO L175 Difference]: Start difference. First operand has 200 places, 304 transitions, 4704 flow. Second operand 9 states and 1072 transitions. [2023-08-27 01:27:20,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 348 transitions, 5703 flow [2023-08-27 01:27:20,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 348 transitions, 5545 flow, removed 14 selfloop flow, removed 7 redundant places. [2023-08-27 01:27:20,626 INFO L231 Difference]: Finished difference. Result has 202 places, 301 transitions, 4689 flow [2023-08-27 01:27:20,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=4548, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4689, PETRI_PLACES=202, PETRI_TRANSITIONS=301} [2023-08-27 01:27:20,627 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 161 predicate places. [2023-08-27 01:27:20,627 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 301 transitions, 4689 flow [2023-08-27 01:27:20,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 112.0) internal successors, (1120), 10 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:20,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:27:20,627 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:27:20,632 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-08-27 01:27:20,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-08-27 01:27:20,828 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-08-27 01:27:20,828 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:27:20,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1534994211, now seen corresponding path program 18 times [2023-08-27 01:27:20,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:27:20,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538606531] [2023-08-27 01:27:20,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:27:20,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:27:20,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:27:22,823 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:27:22,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:27:22,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538606531] [2023-08-27 01:27:22,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538606531] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:27:22,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18951448] [2023-08-27 01:27:22,824 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-27 01:27:22,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:27:22,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:27:22,826 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 01:27:22,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-08-27 01:27:22,975 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2023-08-27 01:27:22,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:27:22,977 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-27 01:27:22,983 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:27:23,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 01:27:23,175 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 34 [2023-08-27 01:27:23,243 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 01:27:23,243 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 01:27:23,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18951448] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 01:27:23,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 01:27:23,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12] total 20 [2023-08-27 01:27:23,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243716568] [2023-08-27 01:27:23,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 01:27:23,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-27 01:27:23,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:27:23,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-27 01:27:23,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2023-08-27 01:27:23,245 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 318 [2023-08-27 01:27:23,246 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 301 transitions, 4689 flow. Second operand has 10 states, 10 states have (on average 112.0) internal successors, (1120), 10 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:23,246 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:27:23,246 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 318 [2023-08-27 01:27:23,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:27:23,827 INFO L124 PetriNetUnfolderBase]: 1263/2318 cut-off events. [2023-08-27 01:27:23,827 INFO L125 PetriNetUnfolderBase]: For 34100/34100 co-relation queries the response was YES. [2023-08-27 01:27:23,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17533 conditions, 2318 events. 1263/2318 cut-off events. For 34100/34100 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 13811 event pairs, 194 based on Foata normal form. 1/2318 useless extension candidates. Maximal degree in co-relation 17458. Up to 1720 conditions per place. [2023-08-27 01:27:23,847 INFO L140 encePairwiseOnDemand]: 309/318 looper letters, 250 selfloop transitions, 71 changer transitions 17/338 dead transitions. [2023-08-27 01:27:23,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 338 transitions, 5667 flow [2023-08-27 01:27:23,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-27 01:27:23,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-27 01:27:23,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 952 transitions. [2023-08-27 01:27:23,848 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3742138364779874 [2023-08-27 01:27:23,849 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 952 transitions. [2023-08-27 01:27:23,849 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 952 transitions. [2023-08-27 01:27:23,849 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:27:23,849 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 952 transitions. [2023-08-27 01:27:23,850 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 119.0) internal successors, (952), 8 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:23,852 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 318.0) internal successors, (2862), 9 states have internal predecessors, (2862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:23,852 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 318.0) internal successors, (2862), 9 states have internal predecessors, (2862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:23,852 INFO L175 Difference]: Start difference. First operand has 202 places, 301 transitions, 4689 flow. Second operand 8 states and 952 transitions. [2023-08-27 01:27:23,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 338 transitions, 5667 flow [2023-08-27 01:27:23,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 338 transitions, 5463 flow, removed 9 selfloop flow, removed 8 redundant places. [2023-08-27 01:27:23,976 INFO L231 Difference]: Finished difference. Result has 200 places, 299 transitions, 4644 flow [2023-08-27 01:27:23,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=4495, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4644, PETRI_PLACES=200, PETRI_TRANSITIONS=299} [2023-08-27 01:27:23,977 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 159 predicate places. [2023-08-27 01:27:23,977 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 299 transitions, 4644 flow [2023-08-27 01:27:23,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 112.0) internal successors, (1120), 10 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:23,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:27:23,977 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:27:23,982 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-08-27 01:27:24,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-08-27 01:27:24,178 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-08-27 01:27:24,178 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:27:24,178 INFO L85 PathProgramCache]: Analyzing trace with hash 391039867, now seen corresponding path program 19 times [2023-08-27 01:27:24,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:27:24,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333835340] [2023-08-27 01:27:24,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:27:24,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:27:24,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:27:25,770 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:27:25,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:27:25,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333835340] [2023-08-27 01:27:25,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333835340] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:27:25,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712386361] [2023-08-27 01:27:25,771 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-27 01:27:25,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:27:25,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:27:25,772 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 01:27:25,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-08-27 01:27:25,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:27:25,899 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 38 conjunts are in the unsatisfiable core [2023-08-27 01:27:25,901 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:27:26,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 01:27:26,091 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 34 [2023-08-27 01:27:26,157 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 01:27:26,157 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:27:26,228 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1184 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1184) c_~queue~0.base)) (.cse1 (* c_~start~0 4))) (= (mod (select .cse0 (+ .cse1 c_~queue~0.offset)) 4294967296) (mod (select .cse0 (+ .cse1 c_~queue~0.offset 4)) 4294967296)))) is different from false [2023-08-27 01:27:26,309 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:27:26,310 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 87 treesize of output 89 [2023-08-27 01:27:26,314 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:27:26,315 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 20 treesize of output 7 [2023-08-27 01:27:26,599 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 01:27:26,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712386361] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-27 01:27:26,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-27 01:27:26,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12, 9] total 29 [2023-08-27 01:27:26,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063945022] [2023-08-27 01:27:26,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 01:27:26,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-27 01:27:26,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:27:26,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-27 01:27:26,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=780, Unknown=1, NotChecked=56, Total=930 [2023-08-27 01:27:26,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 318 [2023-08-27 01:27:26,601 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 299 transitions, 4644 flow. Second operand has 10 states, 10 states have (on average 112.0) internal successors, (1120), 10 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:26,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:27:26,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 318 [2023-08-27 01:27:26,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:27:27,400 INFO L124 PetriNetUnfolderBase]: 1277/2346 cut-off events. [2023-08-27 01:27:27,400 INFO L125 PetriNetUnfolderBase]: For 33884/33884 co-relation queries the response was YES. [2023-08-27 01:27:27,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17664 conditions, 2346 events. 1277/2346 cut-off events. For 33884/33884 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 14063 event pairs, 208 based on Foata normal form. 1/2346 useless extension candidates. Maximal degree in co-relation 17589. Up to 1612 conditions per place. [2023-08-27 01:27:27,423 INFO L140 encePairwiseOnDemand]: 303/318 looper letters, 235 selfloop transitions, 96 changer transitions 23/354 dead transitions. [2023-08-27 01:27:27,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 354 transitions, 5783 flow [2023-08-27 01:27:27,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-27 01:27:27,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-27 01:27:27,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1070 transitions. [2023-08-27 01:27:27,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37386443046820406 [2023-08-27 01:27:27,424 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1070 transitions. [2023-08-27 01:27:27,424 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1070 transitions. [2023-08-27 01:27:27,424 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:27:27,424 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1070 transitions. [2023-08-27 01:27:27,425 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 118.88888888888889) internal successors, (1070), 9 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:27,427 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 318.0) internal successors, (3180), 10 states have internal predecessors, (3180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:27,427 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 318.0) internal successors, (3180), 10 states have internal predecessors, (3180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:27,427 INFO L175 Difference]: Start difference. First operand has 200 places, 299 transitions, 4644 flow. Second operand 9 states and 1070 transitions. [2023-08-27 01:27:27,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 354 transitions, 5783 flow [2023-08-27 01:27:27,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 354 transitions, 5600 flow, removed 16 selfloop flow, removed 8 redundant places. [2023-08-27 01:27:27,548 INFO L231 Difference]: Finished difference. Result has 201 places, 303 transitions, 4786 flow [2023-08-27 01:27:27,548 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=4473, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4786, PETRI_PLACES=201, PETRI_TRANSITIONS=303} [2023-08-27 01:27:27,548 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 160 predicate places. [2023-08-27 01:27:27,548 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 303 transitions, 4786 flow [2023-08-27 01:27:27,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 112.0) internal successors, (1120), 10 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:27,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:27:27,549 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:27:27,556 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-08-27 01:27:27,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:27:27,749 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-08-27 01:27:27,750 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:27:27,750 INFO L85 PathProgramCache]: Analyzing trace with hash 1201869101, now seen corresponding path program 20 times [2023-08-27 01:27:27,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:27:27,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682622792] [2023-08-27 01:27:27,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:27:27,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:27:27,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:27:29,575 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:27:29,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:27:29,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682622792] [2023-08-27 01:27:29,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682622792] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:27:29,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497217367] [2023-08-27 01:27:29,576 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 01:27:29,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:27:29,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:27:29,578 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 01:27:29,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-08-27 01:27:29,721 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-27 01:27:29,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:27:29,722 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 38 conjunts are in the unsatisfiable core [2023-08-27 01:27:29,724 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:27:29,729 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2023-08-27 01:27:29,852 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-08-27 01:27:29,947 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 01:27:29,947 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 01:27:29,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497217367] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 01:27:29,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 01:27:29,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12] total 20 [2023-08-27 01:27:29,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5708210] [2023-08-27 01:27:29,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 01:27:29,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-27 01:27:29,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:27:29,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-27 01:27:29,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2023-08-27 01:27:29,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 318 [2023-08-27 01:27:29,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 303 transitions, 4786 flow. Second operand has 10 states, 10 states have (on average 112.0) internal successors, (1120), 10 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:29,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:27:29,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 318 [2023-08-27 01:27:29,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:27:30,508 INFO L124 PetriNetUnfolderBase]: 1266/2323 cut-off events. [2023-08-27 01:27:30,508 INFO L125 PetriNetUnfolderBase]: For 34870/34870 co-relation queries the response was YES. [2023-08-27 01:27:30,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18206 conditions, 2323 events. 1266/2323 cut-off events. For 34870/34870 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 13897 event pairs, 197 based on Foata normal form. 1/2323 useless extension candidates. Maximal degree in co-relation 18131. Up to 1572 conditions per place. [2023-08-27 01:27:30,529 INFO L140 encePairwiseOnDemand]: 309/318 looper letters, 243 selfloop transitions, 80 changer transitions 14/337 dead transitions. [2023-08-27 01:27:30,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 337 transitions, 5768 flow [2023-08-27 01:27:30,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-27 01:27:30,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-27 01:27:30,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 952 transitions. [2023-08-27 01:27:30,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3742138364779874 [2023-08-27 01:27:30,530 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 952 transitions. [2023-08-27 01:27:30,530 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 952 transitions. [2023-08-27 01:27:30,531 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:27:30,531 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 952 transitions. [2023-08-27 01:27:30,532 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 119.0) internal successors, (952), 8 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:30,533 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 318.0) internal successors, (2862), 9 states have internal predecessors, (2862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:30,533 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 318.0) internal successors, (2862), 9 states have internal predecessors, (2862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:30,533 INFO L175 Difference]: Start difference. First operand has 201 places, 303 transitions, 4786 flow. Second operand 8 states and 952 transitions. [2023-08-27 01:27:30,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 337 transitions, 5768 flow [2023-08-27 01:27:30,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 337 transitions, 5545 flow, removed 43 selfloop flow, removed 8 redundant places. [2023-08-27 01:27:30,652 INFO L231 Difference]: Finished difference. Result has 199 places, 304 transitions, 4840 flow [2023-08-27 01:27:30,652 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=4611, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4840, PETRI_PLACES=199, PETRI_TRANSITIONS=304} [2023-08-27 01:27:30,652 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 158 predicate places. [2023-08-27 01:27:30,653 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 304 transitions, 4840 flow [2023-08-27 01:27:30,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 112.0) internal successors, (1120), 10 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:30,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:27:30,653 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:27:30,659 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-08-27 01:27:30,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-08-27 01:27:30,859 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-08-27 01:27:30,859 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:27:30,859 INFO L85 PathProgramCache]: Analyzing trace with hash 1878896729, now seen corresponding path program 21 times [2023-08-27 01:27:30,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:27:30,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142777088] [2023-08-27 01:27:30,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:27:30,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:27:30,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:27:33,544 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:27:33,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:27:33,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142777088] [2023-08-27 01:27:33,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142777088] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:27:33,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418335648] [2023-08-27 01:27:33,545 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 01:27:33,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:27:33,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:27:33,546 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 01:27:33,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-08-27 01:27:33,692 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-08-27 01:27:33,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:27:33,694 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 36 conjunts are in the unsatisfiable core [2023-08-27 01:27:33,695 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:27:33,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 01:27:33,834 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 21 treesize of output 23 [2023-08-27 01:27:33,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 01:27:33,875 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 21 treesize of output 23 [2023-08-27 01:27:34,017 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 01:27:34,017 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 01:27:34,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418335648] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 01:27:34,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 01:27:34,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11] total 20 [2023-08-27 01:27:34,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20544888] [2023-08-27 01:27:34,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 01:27:34,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-27 01:27:34,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:27:34,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-27 01:27:34,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=413, Unknown=0, NotChecked=0, Total=462 [2023-08-27 01:27:34,019 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 318 [2023-08-27 01:27:34,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 304 transitions, 4840 flow. Second operand has 11 states, 11 states have (on average 108.81818181818181) internal successors, (1197), 11 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:34,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:27:34,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 318 [2023-08-27 01:27:34,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:27:34,608 INFO L124 PetriNetUnfolderBase]: 1272/2335 cut-off events. [2023-08-27 01:27:34,609 INFO L125 PetriNetUnfolderBase]: For 34404/34404 co-relation queries the response was YES. [2023-08-27 01:27:34,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17720 conditions, 2335 events. 1272/2335 cut-off events. For 34404/34404 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 14067 event pairs, 163 based on Foata normal form. 1/2335 useless extension candidates. Maximal degree in co-relation 17646. Up to 1403 conditions per place. [2023-08-27 01:27:34,626 INFO L140 encePairwiseOnDemand]: 308/318 looper letters, 256 selfloop transitions, 78 changer transitions 13/347 dead transitions. [2023-08-27 01:27:34,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 347 transitions, 5875 flow [2023-08-27 01:27:34,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-27 01:27:34,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-27 01:27:34,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 931 transitions. [2023-08-27 01:27:34,627 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36595911949685533 [2023-08-27 01:27:34,627 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 931 transitions. [2023-08-27 01:27:34,627 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 931 transitions. [2023-08-27 01:27:34,627 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:27:34,627 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 931 transitions. [2023-08-27 01:27:34,629 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 116.375) internal successors, (931), 8 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 01:27:34,630 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 318.0) internal successors, (2862), 9 states have internal predecessors, (2862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:34,630 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 318.0) internal successors, (2862), 9 states have internal predecessors, (2862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:34,630 INFO L175 Difference]: Start difference. First operand has 199 places, 304 transitions, 4840 flow. Second operand 8 states and 931 transitions. [2023-08-27 01:27:34,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 347 transitions, 5875 flow [2023-08-27 01:27:34,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 347 transitions, 5771 flow, removed 7 selfloop flow, removed 5 redundant places. [2023-08-27 01:27:34,746 INFO L231 Difference]: Finished difference. Result has 201 places, 307 transitions, 4942 flow [2023-08-27 01:27:34,746 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=4738, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4942, PETRI_PLACES=201, PETRI_TRANSITIONS=307} [2023-08-27 01:27:34,747 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 160 predicate places. [2023-08-27 01:27:34,747 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 307 transitions, 4942 flow [2023-08-27 01:27:34,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 108.81818181818181) internal successors, (1197), 11 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:34,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:27:34,748 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:27:34,756 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-08-27 01:27:34,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-08-27 01:27:34,954 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-08-27 01:27:34,954 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:27:34,954 INFO L85 PathProgramCache]: Analyzing trace with hash -29123595, now seen corresponding path program 22 times [2023-08-27 01:27:34,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:27:34,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86494235] [2023-08-27 01:27:34,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:27:34,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:27:34,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:27:36,530 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:27:36,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:27:36,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86494235] [2023-08-27 01:27:36,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86494235] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:27:36,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281964493] [2023-08-27 01:27:36,530 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 01:27:36,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:27:36,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:27:36,532 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 01:27:36,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-08-27 01:27:36,676 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 01:27:36,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:27:36,678 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 42 conjunts are in the unsatisfiable core [2023-08-27 01:27:36,679 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:27:36,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 01:27:36,846 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 21 treesize of output 23 [2023-08-27 01:27:36,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 01:27:36,955 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 34 [2023-08-27 01:27:37,024 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 01:27:37,025 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:27:37,349 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:27:37,350 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 168 treesize of output 170 [2023-08-27 01:27:37,379 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 71 [2023-08-27 01:27:37,401 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:27:37,401 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 71 treesize of output 69 [2023-08-27 01:27:37,823 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 01:27:37,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281964493] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-27 01:27:37,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-27 01:27:37,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [12, 11] total 32 [2023-08-27 01:27:37,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904728399] [2023-08-27 01:27:37,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 01:27:37,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-27 01:27:37,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:27:37,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-27 01:27:37,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1007, Unknown=10, NotChecked=0, Total=1122 [2023-08-27 01:27:37,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 318 [2023-08-27 01:27:37,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 307 transitions, 4942 flow. Second operand has 11 states, 11 states have (on average 108.81818181818181) internal successors, (1197), 11 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:37,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:27:37,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 318 [2023-08-27 01:27:37,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:27:38,939 INFO L124 PetriNetUnfolderBase]: 1271/2341 cut-off events. [2023-08-27 01:27:38,939 INFO L125 PetriNetUnfolderBase]: For 36425/36425 co-relation queries the response was YES. [2023-08-27 01:27:38,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17934 conditions, 2341 events. 1271/2341 cut-off events. For 36425/36425 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 14109 event pairs, 201 based on Foata normal form. 1/2341 useless extension candidates. Maximal degree in co-relation 17860. Up to 1392 conditions per place. [2023-08-27 01:27:38,958 INFO L140 encePairwiseOnDemand]: 307/318 looper letters, 234 selfloop transitions, 117 changer transitions 16/367 dead transitions. [2023-08-27 01:27:38,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 367 transitions, 6233 flow [2023-08-27 01:27:38,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-27 01:27:38,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-27 01:27:38,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1372 transitions. [2023-08-27 01:27:38,960 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35953878406708595 [2023-08-27 01:27:38,960 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1372 transitions. [2023-08-27 01:27:38,960 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1372 transitions. [2023-08-27 01:27:38,960 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:27:38,960 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1372 transitions. [2023-08-27 01:27:38,961 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 114.33333333333333) internal successors, (1372), 12 states have internal predecessors, (1372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:38,964 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 318.0) internal successors, (4134), 13 states have internal predecessors, (4134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:38,964 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 318.0) internal successors, (4134), 13 states have internal predecessors, (4134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:38,964 INFO L175 Difference]: Start difference. First operand has 201 places, 307 transitions, 4942 flow. Second operand 12 states and 1372 transitions. [2023-08-27 01:27:38,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 367 transitions, 6233 flow [2023-08-27 01:27:39,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 367 transitions, 6145 flow, removed 29 selfloop flow, removed 2 redundant places. [2023-08-27 01:27:39,126 INFO L231 Difference]: Finished difference. Result has 215 places, 316 transitions, 5338 flow [2023-08-27 01:27:39,126 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=4876, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5338, PETRI_PLACES=215, PETRI_TRANSITIONS=316} [2023-08-27 01:27:39,127 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 174 predicate places. [2023-08-27 01:27:39,127 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 316 transitions, 5338 flow [2023-08-27 01:27:39,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 108.81818181818181) internal successors, (1197), 11 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:39,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:27:39,127 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:27:39,132 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-08-27 01:27:39,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:27:39,328 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-08-27 01:27:39,328 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:27:39,328 INFO L85 PathProgramCache]: Analyzing trace with hash -1302702590, now seen corresponding path program 1 times [2023-08-27 01:27:39,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:27:39,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642347460] [2023-08-27 01:27:39,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:27:39,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:27:39,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:27:39,384 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 01:27:39,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:27:39,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642347460] [2023-08-27 01:27:39,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642347460] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 01:27:39,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 01:27:39,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-27 01:27:39,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960974762] [2023-08-27 01:27:39,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 01:27:39,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-27 01:27:39,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:27:39,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-27 01:27:39,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-27 01:27:39,386 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 318 [2023-08-27 01:27:39,386 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 316 transitions, 5338 flow. Second operand has 5 states, 5 states have (on average 135.2) internal successors, (676), 5 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:39,386 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:27:39,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 318 [2023-08-27 01:27:39,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:27:39,845 INFO L124 PetriNetUnfolderBase]: 1259/2306 cut-off events. [2023-08-27 01:27:39,846 INFO L125 PetriNetUnfolderBase]: For 37438/37438 co-relation queries the response was YES. [2023-08-27 01:27:39,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18343 conditions, 2306 events. 1259/2306 cut-off events. For 37438/37438 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 13786 event pairs, 104 based on Foata normal form. 66/2371 useless extension candidates. Maximal degree in co-relation 18262. Up to 1553 conditions per place. [2023-08-27 01:27:39,865 INFO L140 encePairwiseOnDemand]: 312/318 looper letters, 261 selfloop transitions, 104 changer transitions 0/365 dead transitions. [2023-08-27 01:27:39,865 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 365 transitions, 6637 flow [2023-08-27 01:27:39,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-27 01:27:39,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-27 01:27:39,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 850 transitions. [2023-08-27 01:27:39,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44549266247379454 [2023-08-27 01:27:39,866 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 850 transitions. [2023-08-27 01:27:39,867 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 850 transitions. [2023-08-27 01:27:39,867 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:27:39,867 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 850 transitions. [2023-08-27 01:27:39,867 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 141.66666666666666) internal successors, (850), 6 states have internal predecessors, (850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:39,868 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 318.0) internal successors, (2226), 7 states have internal predecessors, (2226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:39,869 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 318.0) internal successors, (2226), 7 states have internal predecessors, (2226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:39,869 INFO L175 Difference]: Start difference. First operand has 215 places, 316 transitions, 5338 flow. Second operand 6 states and 850 transitions. [2023-08-27 01:27:39,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 365 transitions, 6637 flow [2023-08-27 01:27:39,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 365 transitions, 6400 flow, removed 49 selfloop flow, removed 7 redundant places. [2023-08-27 01:27:40,002 INFO L231 Difference]: Finished difference. Result has 210 places, 312 transitions, 5444 flow [2023-08-27 01:27:40,002 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=4993, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5444, PETRI_PLACES=210, PETRI_TRANSITIONS=312} [2023-08-27 01:27:40,002 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 169 predicate places. [2023-08-27 01:27:40,002 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 312 transitions, 5444 flow [2023-08-27 01:27:40,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 135.2) internal successors, (676), 5 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:40,003 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:27:40,003 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:27:40,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2023-08-27 01:27:40,003 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-08-27 01:27:40,003 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:27:40,003 INFO L85 PathProgramCache]: Analyzing trace with hash 1316327696, now seen corresponding path program 2 times [2023-08-27 01:27:40,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:27:40,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993937178] [2023-08-27 01:27:40,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:27:40,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:27:40,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:27:40,070 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 01:27:40,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:27:40,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993937178] [2023-08-27 01:27:40,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993937178] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 01:27:40,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 01:27:40,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-27 01:27:40,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162209620] [2023-08-27 01:27:40,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 01:27:40,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-27 01:27:40,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:27:40,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-27 01:27:40,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-27 01:27:40,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 318 [2023-08-27 01:27:40,073 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 312 transitions, 5444 flow. Second operand has 5 states, 5 states have (on average 135.2) internal successors, (676), 5 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:40,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:27:40,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 318 [2023-08-27 01:27:40,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:27:40,458 INFO L124 PetriNetUnfolderBase]: 1007/1947 cut-off events. [2023-08-27 01:27:40,458 INFO L125 PetriNetUnfolderBase]: For 37246/37246 co-relation queries the response was YES. [2023-08-27 01:27:40,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15803 conditions, 1947 events. 1007/1947 cut-off events. For 37246/37246 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 11930 event pairs, 217 based on Foata normal form. 130/2076 useless extension candidates. Maximal degree in co-relation 15731. Up to 1232 conditions per place. [2023-08-27 01:27:40,474 INFO L140 encePairwiseOnDemand]: 313/318 looper letters, 208 selfloop transitions, 48 changer transitions 40/296 dead transitions. [2023-08-27 01:27:40,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 296 transitions, 5410 flow [2023-08-27 01:27:40,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-27 01:27:40,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-27 01:27:40,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 708 transitions. [2023-08-27 01:27:40,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44528301886792454 [2023-08-27 01:27:40,476 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 708 transitions. [2023-08-27 01:27:40,476 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 708 transitions. [2023-08-27 01:27:40,476 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:27:40,476 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 708 transitions. [2023-08-27 01:27:40,477 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 141.6) internal successors, (708), 5 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:40,478 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 318.0) internal successors, (1908), 6 states have internal predecessors, (1908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:40,478 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 318.0) internal successors, (1908), 6 states have internal predecessors, (1908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:40,478 INFO L175 Difference]: Start difference. First operand has 210 places, 312 transitions, 5444 flow. Second operand 5 states and 708 transitions. [2023-08-27 01:27:40,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 296 transitions, 5410 flow [2023-08-27 01:27:40,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 296 transitions, 5124 flow, removed 41 selfloop flow, removed 13 redundant places. [2023-08-27 01:27:40,594 INFO L231 Difference]: Finished difference. Result has 200 places, 238 transitions, 3868 flow [2023-08-27 01:27:40,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=4313, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3868, PETRI_PLACES=200, PETRI_TRANSITIONS=238} [2023-08-27 01:27:40,595 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 159 predicate places. [2023-08-27 01:27:40,595 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 238 transitions, 3868 flow [2023-08-27 01:27:40,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 135.2) internal successors, (676), 5 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:40,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:27:40,595 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:27:40,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2023-08-27 01:27:40,595 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-08-27 01:27:40,596 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:27:40,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1892633678, now seen corresponding path program 3 times [2023-08-27 01:27:40,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:27:40,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83376996] [2023-08-27 01:27:40,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:27:40,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:27:40,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:27:40,666 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 01:27:40,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:27:40,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83376996] [2023-08-27 01:27:40,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83376996] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 01:27:40,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 01:27:40,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-27 01:27:40,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133557627] [2023-08-27 01:27:40,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 01:27:40,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-27 01:27:40,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:27:40,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-27 01:27:40,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-27 01:27:40,668 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 318 [2023-08-27 01:27:40,669 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 238 transitions, 3868 flow. Second operand has 5 states, 5 states have (on average 135.2) internal successors, (676), 5 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:40,669 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:27:40,669 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 318 [2023-08-27 01:27:40,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:27:41,052 INFO L124 PetriNetUnfolderBase]: 921/1668 cut-off events. [2023-08-27 01:27:41,052 INFO L125 PetriNetUnfolderBase]: For 28755/28755 co-relation queries the response was YES. [2023-08-27 01:27:41,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13786 conditions, 1668 events. 921/1668 cut-off events. For 28755/28755 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 9108 event pairs, 206 based on Foata normal form. 26/1693 useless extension candidates. Maximal degree in co-relation 13722. Up to 1331 conditions per place. [2023-08-27 01:27:41,070 INFO L140 encePairwiseOnDemand]: 312/318 looper letters, 184 selfloop transitions, 58 changer transitions 6/248 dead transitions. [2023-08-27 01:27:41,070 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 248 transitions, 4386 flow [2023-08-27 01:27:41,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-27 01:27:41,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-27 01:27:41,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 700 transitions. [2023-08-27 01:27:41,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44025157232704404 [2023-08-27 01:27:41,071 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 700 transitions. [2023-08-27 01:27:41,071 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 700 transitions. [2023-08-27 01:27:41,072 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:27:41,072 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 700 transitions. [2023-08-27 01:27:41,073 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 140.0) internal successors, (700), 5 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:41,074 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 318.0) internal successors, (1908), 6 states have internal predecessors, (1908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:41,074 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 318.0) internal successors, (1908), 6 states have internal predecessors, (1908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:41,074 INFO L175 Difference]: Start difference. First operand has 200 places, 238 transitions, 3868 flow. Second operand 5 states and 700 transitions. [2023-08-27 01:27:41,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 248 transitions, 4386 flow [2023-08-27 01:27:41,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 248 transitions, 4183 flow, removed 43 selfloop flow, removed 11 redundant places. [2023-08-27 01:27:41,160 INFO L231 Difference]: Finished difference. Result has 183 places, 222 transitions, 3512 flow [2023-08-27 01:27:41,160 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=3421, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3512, PETRI_PLACES=183, PETRI_TRANSITIONS=222} [2023-08-27 01:27:41,160 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 142 predicate places. [2023-08-27 01:27:41,160 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 222 transitions, 3512 flow [2023-08-27 01:27:41,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 135.2) internal successors, (676), 5 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:41,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:27:41,161 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:27:41,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2023-08-27 01:27:41,161 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-08-27 01:27:41,161 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:27:41,161 INFO L85 PathProgramCache]: Analyzing trace with hash -1855555475, now seen corresponding path program 2 times [2023-08-27 01:27:41,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:27:41,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186860872] [2023-08-27 01:27:41,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:27:41,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:27:41,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:27:41,234 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 01:27:41,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:27:41,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186860872] [2023-08-27 01:27:41,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186860872] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 01:27:41,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 01:27:41,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-27 01:27:41,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665915173] [2023-08-27 01:27:41,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 01:27:41,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-27 01:27:41,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:27:41,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-27 01:27:41,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-27 01:27:41,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 318 [2023-08-27 01:27:41,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 222 transitions, 3512 flow. Second operand has 5 states, 5 states have (on average 135.2) internal successors, (676), 5 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:41,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:27:41,237 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 318 [2023-08-27 01:27:41,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:27:41,547 INFO L124 PetriNetUnfolderBase]: 830/1496 cut-off events. [2023-08-27 01:27:41,547 INFO L125 PetriNetUnfolderBase]: For 22247/22247 co-relation queries the response was YES. [2023-08-27 01:27:41,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11847 conditions, 1496 events. 830/1496 cut-off events. For 22247/22247 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 7892 event pairs, 182 based on Foata normal form. 24/1519 useless extension candidates. Maximal degree in co-relation 11789. Up to 1159 conditions per place. [2023-08-27 01:27:41,563 INFO L140 encePairwiseOnDemand]: 312/318 looper letters, 159 selfloop transitions, 45 changer transitions 10/214 dead transitions. [2023-08-27 01:27:41,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 214 transitions, 3675 flow [2023-08-27 01:27:41,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-27 01:27:41,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-27 01:27:41,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 697 transitions. [2023-08-27 01:27:41,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43836477987421385 [2023-08-27 01:27:41,565 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 697 transitions. [2023-08-27 01:27:41,565 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 697 transitions. [2023-08-27 01:27:41,565 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:27:41,565 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 697 transitions. [2023-08-27 01:27:41,566 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 139.4) internal successors, (697), 5 states have internal predecessors, (697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:41,567 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 318.0) internal successors, (1908), 6 states have internal predecessors, (1908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:41,567 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 318.0) internal successors, (1908), 6 states have internal predecessors, (1908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:41,567 INFO L175 Difference]: Start difference. First operand has 183 places, 222 transitions, 3512 flow. Second operand 5 states and 697 transitions. [2023-08-27 01:27:41,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 214 transitions, 3675 flow [2023-08-27 01:27:41,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 214 transitions, 3452 flow, removed 31 selfloop flow, removed 9 redundant places. [2023-08-27 01:27:41,641 INFO L231 Difference]: Finished difference. Result has 171 places, 193 transitions, 2841 flow [2023-08-27 01:27:41,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=2919, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2841, PETRI_PLACES=171, PETRI_TRANSITIONS=193} [2023-08-27 01:27:41,641 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 130 predicate places. [2023-08-27 01:27:41,642 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 193 transitions, 2841 flow [2023-08-27 01:27:41,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 135.2) internal successors, (676), 5 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:41,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:27:41,642 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:27:41,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2023-08-27 01:27:41,642 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-08-27 01:27:41,642 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:27:41,643 INFO L85 PathProgramCache]: Analyzing trace with hash 640273047, now seen corresponding path program 3 times [2023-08-27 01:27:41,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:27:41,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896724557] [2023-08-27 01:27:41,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:27:41,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:27:41,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:27:41,708 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 01:27:41,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:27:41,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896724557] [2023-08-27 01:27:41,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896724557] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 01:27:41,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 01:27:41,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-27 01:27:41,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937855762] [2023-08-27 01:27:41,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 01:27:41,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-27 01:27:41,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:27:41,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-27 01:27:41,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-27 01:27:41,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 318 [2023-08-27 01:27:41,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 193 transitions, 2841 flow. Second operand has 5 states, 5 states have (on average 135.2) internal successors, (676), 5 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:41,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:27:41,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 318 [2023-08-27 01:27:41,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:27:41,952 INFO L124 PetriNetUnfolderBase]: 796/1431 cut-off events. [2023-08-27 01:27:41,952 INFO L125 PetriNetUnfolderBase]: For 18689/18689 co-relation queries the response was YES. [2023-08-27 01:27:41,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10786 conditions, 1431 events. 796/1431 cut-off events. For 18689/18689 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 7415 event pairs, 189 based on Foata normal form. 18/1448 useless extension candidates. Maximal degree in co-relation 10733. Up to 1144 conditions per place. [2023-08-27 01:27:41,963 INFO L140 encePairwiseOnDemand]: 313/318 looper letters, 148 selfloop transitions, 46 changer transitions 8/202 dead transitions. [2023-08-27 01:27:41,963 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 202 transitions, 3234 flow [2023-08-27 01:27:41,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-27 01:27:41,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-27 01:27:41,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 697 transitions. [2023-08-27 01:27:41,964 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43836477987421385 [2023-08-27 01:27:41,964 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 697 transitions. [2023-08-27 01:27:41,964 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 697 transitions. [2023-08-27 01:27:41,964 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:27:41,964 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 697 transitions. [2023-08-27 01:27:41,965 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 139.4) internal successors, (697), 5 states have internal predecessors, (697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:41,965 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 318.0) internal successors, (1908), 6 states have internal predecessors, (1908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:41,966 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 318.0) internal successors, (1908), 6 states have internal predecessors, (1908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:41,966 INFO L175 Difference]: Start difference. First operand has 171 places, 193 transitions, 2841 flow. Second operand 5 states and 697 transitions. [2023-08-27 01:27:41,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 202 transitions, 3234 flow [2023-08-27 01:27:42,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 202 transitions, 3045 flow, removed 29 selfloop flow, removed 10 redundant places. [2023-08-27 01:27:42,008 INFO L231 Difference]: Finished difference. Result has 160 places, 180 transitions, 2516 flow [2023-08-27 01:27:42,008 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=2542, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2516, PETRI_PLACES=160, PETRI_TRANSITIONS=180} [2023-08-27 01:27:42,009 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 119 predicate places. [2023-08-27 01:27:42,009 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 180 transitions, 2516 flow [2023-08-27 01:27:42,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 135.2) internal successors, (676), 5 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:42,009 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:27:42,009 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:27:42,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2023-08-27 01:27:42,009 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-08-27 01:27:42,010 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:27:42,010 INFO L85 PathProgramCache]: Analyzing trace with hash -679613291, now seen corresponding path program 4 times [2023-08-27 01:27:42,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:27:42,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207202348] [2023-08-27 01:27:42,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:27:42,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:27:42,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:27:42,092 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 01:27:42,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:27:42,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207202348] [2023-08-27 01:27:42,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207202348] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 01:27:42,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 01:27:42,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-27 01:27:42,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736801261] [2023-08-27 01:27:42,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 01:27:42,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-27 01:27:42,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:27:42,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-27 01:27:42,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-27 01:27:42,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 318 [2023-08-27 01:27:42,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 180 transitions, 2516 flow. Second operand has 5 states, 5 states have (on average 135.2) internal successors, (676), 5 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:42,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:27:42,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 318 [2023-08-27 01:27:42,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:27:42,411 INFO L124 PetriNetUnfolderBase]: 727/1288 cut-off events. [2023-08-27 01:27:42,411 INFO L125 PetriNetUnfolderBase]: For 14882/14882 co-relation queries the response was YES. [2023-08-27 01:27:42,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9135 conditions, 1288 events. 727/1288 cut-off events. For 14882/14882 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 6345 event pairs, 161 based on Foata normal form. 18/1305 useless extension candidates. Maximal degree in co-relation 9088. Up to 940 conditions per place. [2023-08-27 01:27:42,425 INFO L140 encePairwiseOnDemand]: 312/318 looper letters, 135 selfloop transitions, 42 changer transitions 13/190 dead transitions. [2023-08-27 01:27:42,425 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 190 transitions, 2817 flow [2023-08-27 01:27:42,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-27 01:27:42,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-27 01:27:42,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 703 transitions. [2023-08-27 01:27:42,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4421383647798742 [2023-08-27 01:27:42,427 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 703 transitions. [2023-08-27 01:27:42,427 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 703 transitions. [2023-08-27 01:27:42,427 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:27:42,427 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 703 transitions. [2023-08-27 01:27:42,427 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 140.6) internal successors, (703), 5 states have internal predecessors, (703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:42,428 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 318.0) internal successors, (1908), 6 states have internal predecessors, (1908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:42,429 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 318.0) internal successors, (1908), 6 states have internal predecessors, (1908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:42,429 INFO L175 Difference]: Start difference. First operand has 160 places, 180 transitions, 2516 flow. Second operand 5 states and 703 transitions. [2023-08-27 01:27:42,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 190 transitions, 2817 flow [2023-08-27 01:27:42,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 190 transitions, 2679 flow, removed 12 selfloop flow, removed 7 redundant places. [2023-08-27 01:27:42,469 INFO L231 Difference]: Finished difference. Result has 150 places, 157 transitions, 2107 flow [2023-08-27 01:27:42,469 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=2178, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2107, PETRI_PLACES=150, PETRI_TRANSITIONS=157} [2023-08-27 01:27:42,469 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 109 predicate places. [2023-08-27 01:27:42,469 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 157 transitions, 2107 flow [2023-08-27 01:27:42,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 135.2) internal successors, (676), 5 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:42,469 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:27:42,470 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:27:42,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2023-08-27 01:27:42,470 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-08-27 01:27:42,470 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:27:42,470 INFO L85 PathProgramCache]: Analyzing trace with hash -1333139025, now seen corresponding path program 1 times [2023-08-27 01:27:42,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:27:42,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910475133] [2023-08-27 01:27:42,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:27:42,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:27:42,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:27:43,848 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:27:43,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:27:43,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910475133] [2023-08-27 01:27:43,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910475133] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:27:43,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980112340] [2023-08-27 01:27:43,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:27:43,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:27:43,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:27:43,851 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 01:27:43,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-08-27 01:27:43,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:27:43,994 INFO L262 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 42 conjunts are in the unsatisfiable core [2023-08-27 01:27:43,995 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:27:44,281 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:27:44,281 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:27:44,443 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:27:44,443 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 60 [2023-08-27 01:27:44,964 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:27:44,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980112340] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:27:44,965 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:27:44,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 35 [2023-08-27 01:27:44,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841359058] [2023-08-27 01:27:44,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:27:44,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-08-27 01:27:44,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:27:44,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-08-27 01:27:44,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1160, Unknown=0, NotChecked=0, Total=1332 [2023-08-27 01:27:44,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 318 [2023-08-27 01:27:44,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 157 transitions, 2107 flow. Second operand has 37 states, 37 states have (on average 90.86486486486487) internal successors, (3362), 37 states have internal predecessors, (3362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:44,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:27:44,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 318 [2023-08-27 01:27:44,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:27:48,047 INFO L124 PetriNetUnfolderBase]: 1119/1847 cut-off events. [2023-08-27 01:27:48,048 INFO L125 PetriNetUnfolderBase]: For 21751/21751 co-relation queries the response was YES. [2023-08-27 01:27:48,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13059 conditions, 1847 events. 1119/1847 cut-off events. For 21751/21751 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 8973 event pairs, 107 based on Foata normal form. 3/1849 useless extension candidates. Maximal degree in co-relation 13013. Up to 353 conditions per place. [2023-08-27 01:27:48,059 INFO L140 encePairwiseOnDemand]: 305/318 looper letters, 202 selfloop transitions, 124 changer transitions 47/373 dead transitions. [2023-08-27 01:27:48,059 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 373 transitions, 4737 flow [2023-08-27 01:27:48,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-08-27 01:27:48,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-08-27 01:27:48,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 3092 transitions. [2023-08-27 01:27:48,063 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3038522012578616 [2023-08-27 01:27:48,063 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 3092 transitions. [2023-08-27 01:27:48,063 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 3092 transitions. [2023-08-27 01:27:48,064 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:27:48,064 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 3092 transitions. [2023-08-27 01:27:48,066 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 96.625) internal successors, (3092), 32 states have internal predecessors, (3092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:48,072 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 318.0) internal successors, (10494), 33 states have internal predecessors, (10494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:48,073 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 318.0) internal successors, (10494), 33 states have internal predecessors, (10494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:48,073 INFO L175 Difference]: Start difference. First operand has 150 places, 157 transitions, 2107 flow. Second operand 32 states and 3092 transitions. [2023-08-27 01:27:48,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 373 transitions, 4737 flow [2023-08-27 01:27:48,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 373 transitions, 4582 flow, removed 15 selfloop flow, removed 9 redundant places. [2023-08-27 01:27:48,127 INFO L231 Difference]: Finished difference. Result has 183 places, 226 transitions, 3496 flow [2023-08-27 01:27:48,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=1986, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=3496, PETRI_PLACES=183, PETRI_TRANSITIONS=226} [2023-08-27 01:27:48,128 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 142 predicate places. [2023-08-27 01:27:48,128 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 226 transitions, 3496 flow [2023-08-27 01:27:48,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 90.86486486486487) internal successors, (3362), 37 states have internal predecessors, (3362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:48,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:27:48,128 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:27:48,134 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-08-27 01:27:48,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-08-27 01:27:48,329 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-08-27 01:27:48,329 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:27:48,329 INFO L85 PathProgramCache]: Analyzing trace with hash -162497967, now seen corresponding path program 2 times [2023-08-27 01:27:48,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:27:48,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451064382] [2023-08-27 01:27:48,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:27:48,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:27:48,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:27:49,473 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:27:49,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:27:49,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451064382] [2023-08-27 01:27:49,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451064382] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:27:49,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372274293] [2023-08-27 01:27:49,473 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 01:27:49,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:27:49,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:27:49,474 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 01:27:49,476 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-08-27 01:27:49,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 01:27:49,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:27:49,641 INFO L262 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 53 conjunts are in the unsatisfiable core [2023-08-27 01:27:49,643 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:27:49,715 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-27 01:27:49,759 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-27 01:27:49,800 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-27 01:27:49,835 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-27 01:27:50,171 INFO L322 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2023-08-27 01:27:50,171 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 38 [2023-08-27 01:27:50,203 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:27:50,204 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:27:55,244 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:27:55,244 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 133 treesize of output 97 [2023-08-27 01:27:55,298 INFO L322 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-27 01:27:55,298 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 956 treesize of output 926 [2023-08-27 01:27:55,366 INFO L322 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-27 01:27:55,367 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 435 treesize of output 421 [2023-08-27 01:27:55,440 INFO L322 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-27 01:27:55,440 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 385 treesize of output 321 [2023-08-27 01:27:55,513 INFO L322 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-27 01:27:55,514 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 222 treesize of output 233 [2023-08-27 01:27:57,598 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:27:57,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372274293] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:27:57,598 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:27:57,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 38 [2023-08-27 01:27:57,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968326612] [2023-08-27 01:27:57,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:27:57,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-08-27 01:27:57,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:27:57,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-08-27 01:27:57,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1367, Unknown=8, NotChecked=0, Total=1560 [2023-08-27 01:27:57,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 318 [2023-08-27 01:27:57,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 226 transitions, 3496 flow. Second operand has 40 states, 40 states have (on average 90.725) internal successors, (3629), 40 states have internal predecessors, (3629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:57,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:27:57,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 318 [2023-08-27 01:27:57,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:28:01,891 INFO L124 PetriNetUnfolderBase]: 1274/2157 cut-off events. [2023-08-27 01:28:01,891 INFO L125 PetriNetUnfolderBase]: For 29759/29759 co-relation queries the response was YES. [2023-08-27 01:28:01,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16383 conditions, 2157 events. 1274/2157 cut-off events. For 29759/29759 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 11302 event pairs, 268 based on Foata normal form. 1/2157 useless extension candidates. Maximal degree in co-relation 16324. Up to 1005 conditions per place. [2023-08-27 01:28:01,943 INFO L140 encePairwiseOnDemand]: 307/318 looper letters, 273 selfloop transitions, 69 changer transitions 17/359 dead transitions. [2023-08-27 01:28:01,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 359 transitions, 5282 flow [2023-08-27 01:28:01,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-27 01:28:01,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-27 01:28:01,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1836 transitions. [2023-08-27 01:28:01,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3038728897715988 [2023-08-27 01:28:01,946 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1836 transitions. [2023-08-27 01:28:01,946 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1836 transitions. [2023-08-27 01:28:01,946 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:28:01,946 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1836 transitions. [2023-08-27 01:28:01,948 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 96.63157894736842) internal successors, (1836), 19 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:28:01,951 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 318.0) internal successors, (6360), 20 states have internal predecessors, (6360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:28:01,951 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 318.0) internal successors, (6360), 20 states have internal predecessors, (6360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:28:01,951 INFO L175 Difference]: Start difference. First operand has 183 places, 226 transitions, 3496 flow. Second operand 19 states and 1836 transitions. [2023-08-27 01:28:01,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 359 transitions, 5282 flow [2023-08-27 01:28:02,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 359 transitions, 4704 flow, removed 175 selfloop flow, removed 17 redundant places. [2023-08-27 01:28:02,018 INFO L231 Difference]: Finished difference. Result has 186 places, 251 transitions, 3566 flow [2023-08-27 01:28:02,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=2944, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=3566, PETRI_PLACES=186, PETRI_TRANSITIONS=251} [2023-08-27 01:28:02,018 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 145 predicate places. [2023-08-27 01:28:02,019 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 251 transitions, 3566 flow [2023-08-27 01:28:02,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 90.725) internal successors, (3629), 40 states have internal predecessors, (3629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:28:02,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:28:02,019 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:28:02,024 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-08-27 01:28:02,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:28:02,220 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-08-27 01:28:02,220 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:28:02,220 INFO L85 PathProgramCache]: Analyzing trace with hash 929727437, now seen corresponding path program 3 times [2023-08-27 01:28:02,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:28:02,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264572903] [2023-08-27 01:28:02,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:28:02,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:28:02,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:28:03,308 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:28:03,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:28:03,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264572903] [2023-08-27 01:28:03,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264572903] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:28:03,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581223071] [2023-08-27 01:28:03,308 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 01:28:03,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:28:03,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:28:03,310 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 01:28:03,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-08-27 01:28:03,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-27 01:28:03,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:28:03,507 INFO L262 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 55 conjunts are in the unsatisfiable core [2023-08-27 01:28:03,509 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:28:03,598 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-27 01:28:03,636 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-27 01:28:03,671 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-27 01:28:03,703 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-27 01:28:03,932 INFO L322 Elim1Store]: treesize reduction 16, result has 15.8 percent of original size [2023-08-27 01:28:03,933 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 82 treesize of output 35 [2023-08-27 01:28:03,961 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:28:03,962 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:28:05,137 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:28:05,138 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 133 treesize of output 97 [2023-08-27 01:28:05,208 INFO L322 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-27 01:28:05,209 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 1932 treesize of output 1836 [2023-08-27 01:28:05,224 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 01:28:05,264 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:28:05,264 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 321 treesize of output 307 [2023-08-27 01:28:05,280 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 01:28:05,316 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:28:05,316 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 271 treesize of output 282 [2023-08-27 01:28:05,414 INFO L322 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-27 01:28:05,414 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 297 treesize of output 233 [2023-08-27 01:28:08,469 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:28:08,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581223071] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:28:08,470 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:28:08,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 37 [2023-08-27 01:28:08,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826367356] [2023-08-27 01:28:08,470 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:28:08,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-08-27 01:28:08,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:28:08,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-08-27 01:28:08,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1286, Unknown=6, NotChecked=0, Total=1482 [2023-08-27 01:28:08,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 318 [2023-08-27 01:28:08,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 251 transitions, 3566 flow. Second operand has 39 states, 39 states have (on average 90.61538461538461) internal successors, (3534), 39 states have internal predecessors, (3534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:28:08,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:28:08,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 318 [2023-08-27 01:28:08,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:28:18,308 WARN L234 SmtUtils]: Spent 5.16s on a formula simplification. DAG size of input: 159 DAG size of output: 146 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 01:28:22,556 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 01:28:24,573 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 01:28:26,607 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 01:28:28,635 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 01:28:30,766 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 01:28:34,428 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 01:28:40,145 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 01:28:42,195 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 01:28:48,038 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 01:28:50,065 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 01:28:52,136 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 01:28:54,161 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 01:28:57,164 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 01:28:59,187 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 01:29:01,213 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 01:29:03,231 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 01:29:05,248 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 01:29:15,836 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 01:29:19,566 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 01:29:26,777 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 01:29:28,817 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 01:29:30,473 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 01:29:36,621 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 01:29:46,193 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 01:29:48,666 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 01:29:50,754 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 01:30:00,965 WARN L234 SmtUtils]: Spent 9.42s on a formula simplification. DAG size of input: 164 DAG size of output: 146 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 01:30:11,041 WARN L234 SmtUtils]: Spent 6.83s on a formula simplification. DAG size of input: 135 DAG size of output: 114 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 01:30:13,200 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 01:30:16,588 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 01:30:18,673 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 01:30:21,075 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 01:30:26,000 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 01:30:28,035 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 01:30:30,062 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 01:30:32,086 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 01:30:34,116 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 01:30:36,431 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 01:30:38,583 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 01:30:40,618 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 01:30:42,644 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 01:30:44,662 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 01:30:46,686 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 01:30:49,003 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 01:30:52,279 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 01:30:54,303 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 01:30:56,355 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 01:30:58,560 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 01:31:02,766 INFO L124 PetriNetUnfolderBase]: 1467/2576 cut-off events. [2023-08-27 01:31:02,766 INFO L125 PetriNetUnfolderBase]: For 28611/28611 co-relation queries the response was YES. [2023-08-27 01:31:02,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18009 conditions, 2576 events. 1467/2576 cut-off events. For 28611/28611 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 14662 event pairs, 290 based on Foata normal form. 2/2577 useless extension candidates. Maximal degree in co-relation 17949. Up to 1005 conditions per place. [2023-08-27 01:31:02,784 INFO L140 encePairwiseOnDemand]: 304/318 looper letters, 285 selfloop transitions, 167 changer transitions 26/478 dead transitions. [2023-08-27 01:31:02,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 478 transitions, 6287 flow [2023-08-27 01:31:02,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-08-27 01:31:02,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-08-27 01:31:02,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 3746 transitions. [2023-08-27 01:31:02,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3020480567650379 [2023-08-27 01:31:02,789 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 3746 transitions. [2023-08-27 01:31:02,789 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 3746 transitions. [2023-08-27 01:31:02,790 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:31:02,790 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 3746 transitions. [2023-08-27 01:31:02,793 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 96.05128205128206) internal successors, (3746), 39 states have internal predecessors, (3746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:31:02,799 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 318.0) internal successors, (12720), 40 states have internal predecessors, (12720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:31:02,799 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 318.0) internal successors, (12720), 40 states have internal predecessors, (12720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:31:02,799 INFO L175 Difference]: Start difference. First operand has 186 places, 251 transitions, 3566 flow. Second operand 39 states and 3746 transitions. [2023-08-27 01:31:02,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 478 transitions, 6287 flow [2023-08-27 01:31:02,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 478 transitions, 6111 flow, removed 57 selfloop flow, removed 10 redundant places. [2023-08-27 01:31:02,881 INFO L231 Difference]: Finished difference. Result has 224 places, 324 transitions, 5035 flow [2023-08-27 01:31:02,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=3485, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=5035, PETRI_PLACES=224, PETRI_TRANSITIONS=324} [2023-08-27 01:31:02,882 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 183 predicate places. [2023-08-27 01:31:02,882 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 324 transitions, 5035 flow [2023-08-27 01:31:02,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 90.61538461538461) internal successors, (3534), 39 states have internal predecessors, (3534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:31:02,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:31:02,883 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:31:02,893 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-08-27 01:31:03,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-08-27 01:31:03,089 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-08-27 01:31:03,089 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:31:03,089 INFO L85 PathProgramCache]: Analyzing trace with hash -225945093, now seen corresponding path program 4 times [2023-08-27 01:31:03,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:31:03,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886921607] [2023-08-27 01:31:03,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:31:03,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:31:03,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:31:07,805 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:31:07,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:31:07,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886921607] [2023-08-27 01:31:07,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886921607] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:31:07,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800477485] [2023-08-27 01:31:07,806 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 01:31:07,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:31:07,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:31:07,813 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 01:31:07,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-08-27 01:31:07,974 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 01:31:07,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:31:07,976 INFO L262 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 39 conjunts are in the unsatisfiable core [2023-08-27 01:31:07,977 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:31:10,822 INFO L322 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2023-08-27 01:31:10,823 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 38 [2023-08-27 01:31:11,065 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:31:11,065 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:31:12,850 INFO L322 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-27 01:31:12,850 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 59 treesize of output 62 [2023-08-27 01:31:18,043 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:31:18,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800477485] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:31:18,043 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:31:18,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 34 [2023-08-27 01:31:18,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831452779] [2023-08-27 01:31:18,043 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:31:18,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-08-27 01:31:18,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:31:18,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-08-27 01:31:18,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1099, Unknown=0, NotChecked=0, Total=1260 [2023-08-27 01:31:18,046 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 318 [2023-08-27 01:31:18,048 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 324 transitions, 5035 flow. Second operand has 36 states, 36 states have (on average 100.91666666666667) internal successors, (3633), 36 states have internal predecessors, (3633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:31:18,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:31:18,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 318 [2023-08-27 01:31:18,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:31:40,183 INFO L124 PetriNetUnfolderBase]: 1498/2688 cut-off events. [2023-08-27 01:31:40,183 INFO L125 PetriNetUnfolderBase]: For 34404/34404 co-relation queries the response was YES. [2023-08-27 01:31:40,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19776 conditions, 2688 events. 1498/2688 cut-off events. For 34404/34404 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 15786 event pairs, 302 based on Foata normal form. 1/2688 useless extension candidates. Maximal degree in co-relation 19706. Up to 1005 conditions per place. [2023-08-27 01:31:40,205 INFO L140 encePairwiseOnDemand]: 305/318 looper letters, 312 selfloop transitions, 155 changer transitions 13/480 dead transitions. [2023-08-27 01:31:40,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 480 transitions, 7127 flow [2023-08-27 01:31:40,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-27 01:31:40,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-27 01:31:40,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 2668 transitions. [2023-08-27 01:31:40,208 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3355974842767296 [2023-08-27 01:31:40,208 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 2668 transitions. [2023-08-27 01:31:40,208 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 2668 transitions. [2023-08-27 01:31:40,208 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:31:40,208 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 2668 transitions. [2023-08-27 01:31:40,210 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 106.72) internal successors, (2668), 25 states have internal predecessors, (2668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:31:40,214 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 318.0) internal successors, (8268), 26 states have internal predecessors, (8268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:31:40,215 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 318.0) internal successors, (8268), 26 states have internal predecessors, (8268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:31:40,215 INFO L175 Difference]: Start difference. First operand has 224 places, 324 transitions, 5035 flow. Second operand 25 states and 2668 transitions. [2023-08-27 01:31:40,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 480 transitions, 7127 flow [2023-08-27 01:31:40,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 480 transitions, 6900 flow, removed 90 selfloop flow, removed 11 redundant places. [2023-08-27 01:31:40,340 INFO L231 Difference]: Finished difference. Result has 244 places, 345 transitions, 5691 flow [2023-08-27 01:31:40,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=4886, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=5691, PETRI_PLACES=244, PETRI_TRANSITIONS=345} [2023-08-27 01:31:40,341 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 203 predicate places. [2023-08-27 01:31:40,341 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 345 transitions, 5691 flow [2023-08-27 01:31:40,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 100.91666666666667) internal successors, (3633), 36 states have internal predecessors, (3633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:31:40,342 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:31:40,342 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:31:40,347 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2023-08-27 01:31:40,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-08-27 01:31:40,547 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-08-27 01:31:40,547 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:31:40,547 INFO L85 PathProgramCache]: Analyzing trace with hash -533597785, now seen corresponding path program 5 times [2023-08-27 01:31:40,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:31:40,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496461979] [2023-08-27 01:31:40,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:31:40,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:31:40,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:31:45,250 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:31:45,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:31:45,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496461979] [2023-08-27 01:31:45,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496461979] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:31:45,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456536141] [2023-08-27 01:31:45,251 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-27 01:31:45,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:31:45,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:31:45,252 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 01:31:45,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-08-27 01:31:45,405 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 01:31:45,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:31:45,407 INFO L262 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 44 conjunts are in the unsatisfiable core [2023-08-27 01:31:45,408 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:31:47,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 01:31:47,562 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 22 treesize of output 24 [2023-08-27 01:31:48,874 INFO L322 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2023-08-27 01:31:48,874 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 38 [2023-08-27 01:31:49,130 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:31:49,130 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:31:53,633 INFO L322 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-27 01:31:53,633 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 114 treesize of output 117 [2023-08-27 01:31:53,746 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:31:53,747 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 60 [2023-08-27 01:31:59,765 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:31:59,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456536141] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:31:59,765 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:31:59,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 36 [2023-08-27 01:31:59,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924578986] [2023-08-27 01:31:59,766 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:31:59,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-08-27 01:31:59,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:31:59,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-08-27 01:31:59,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1250, Unknown=1, NotChecked=0, Total=1406 [2023-08-27 01:31:59,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 318 [2023-08-27 01:31:59,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 345 transitions, 5691 flow. Second operand has 38 states, 38 states have (on average 96.8157894736842) internal successors, (3679), 38 states have internal predecessors, (3679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:31:59,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:31:59,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 318 [2023-08-27 01:31:59,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:32:25,275 INFO L124 PetriNetUnfolderBase]: 1519/2740 cut-off events. [2023-08-27 01:32:25,275 INFO L125 PetriNetUnfolderBase]: For 40250/40250 co-relation queries the response was YES. [2023-08-27 01:32:25,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20741 conditions, 2740 events. 1519/2740 cut-off events. For 40250/40250 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 16288 event pairs, 318 based on Foata normal form. 2/2741 useless extension candidates. Maximal degree in co-relation 20664. Up to 1005 conditions per place. [2023-08-27 01:32:25,300 INFO L140 encePairwiseOnDemand]: 306/318 looper letters, 321 selfloop transitions, 118 changer transitions 18/457 dead transitions. [2023-08-27 01:32:25,300 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 457 transitions, 7354 flow [2023-08-27 01:32:25,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-27 01:32:25,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-27 01:32:25,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2251 transitions. [2023-08-27 01:32:25,302 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3217552887364208 [2023-08-27 01:32:25,302 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2251 transitions. [2023-08-27 01:32:25,302 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2251 transitions. [2023-08-27 01:32:25,302 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:32:25,303 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2251 transitions. [2023-08-27 01:32:25,304 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 102.31818181818181) internal successors, (2251), 22 states have internal predecessors, (2251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:32:25,308 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 318.0) internal successors, (7314), 23 states have internal predecessors, (7314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:32:25,309 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 318.0) internal successors, (7314), 23 states have internal predecessors, (7314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:32:25,309 INFO L175 Difference]: Start difference. First operand has 244 places, 345 transitions, 5691 flow. Second operand 22 states and 2251 transitions. [2023-08-27 01:32:25,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 457 transitions, 7354 flow [2023-08-27 01:32:25,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 457 transitions, 7250 flow, removed 20 selfloop flow, removed 10 redundant places. [2023-08-27 01:32:25,480 INFO L231 Difference]: Finished difference. Result has 257 places, 345 transitions, 5851 flow [2023-08-27 01:32:25,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=5593, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=5851, PETRI_PLACES=257, PETRI_TRANSITIONS=345} [2023-08-27 01:32:25,481 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 216 predicate places. [2023-08-27 01:32:25,481 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 345 transitions, 5851 flow [2023-08-27 01:32:25,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 96.8157894736842) internal successors, (3679), 38 states have internal predecessors, (3679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:32:25,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:32:25,481 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:32:25,486 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-08-27 01:32:25,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:32:25,682 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-08-27 01:32:25,682 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:32:25,682 INFO L85 PathProgramCache]: Analyzing trace with hash 1394727311, now seen corresponding path program 6 times [2023-08-27 01:32:25,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:32:25,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840811999] [2023-08-27 01:32:25,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:32:25,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:32:25,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:32:29,744 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:32:29,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:32:29,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840811999] [2023-08-27 01:32:29,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840811999] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:32:29,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405426981] [2023-08-27 01:32:29,744 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-27 01:32:29,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:32:29,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:32:29,745 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 01:32:29,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-08-27 01:32:29,940 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-27 01:32:29,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:32:29,942 INFO L262 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 63 conjunts are in the unsatisfiable core [2023-08-27 01:32:29,943 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:32:30,558 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-27 01:32:30,902 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-27 01:32:31,215 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-27 01:32:33,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 01:32:33,332 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 26 treesize of output 26 [2023-08-27 01:32:33,830 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 01:32:33,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 01:32:33,850 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:32:33,850 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 78 treesize of output 35 [2023-08-27 01:32:34,117 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:32:34,117 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:32:39,029 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:32:39,029 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 127 treesize of output 91 [2023-08-27 01:32:39,416 INFO L322 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-27 01:32:39,417 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 592 treesize of output 578 [2023-08-27 01:32:39,840 INFO L322 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-27 01:32:39,840 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 315 treesize of output 301 [2023-08-27 01:32:39,894 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 01:32:40,112 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:32:40,112 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 176 treesize of output 187 [2023-08-27 01:32:40,145 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:32:40,145 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 178 treesize of output 126 [2023-08-27 01:32:44,467 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:32:44,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405426981] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:32:44,468 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:32:44,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 38 [2023-08-27 01:32:44,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526211563] [2023-08-27 01:32:44,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:32:44,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-08-27 01:32:44,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:32:44,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-08-27 01:32:44,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1367, Unknown=9, NotChecked=0, Total=1560 [2023-08-27 01:32:44,471 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 318 [2023-08-27 01:32:44,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 345 transitions, 5851 flow. Second operand has 40 states, 40 states have (on average 90.725) internal successors, (3629), 40 states have internal predecessors, (3629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:32:44,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:32:44,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 318 [2023-08-27 01:32:44,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:33:17,224 INFO L124 PetriNetUnfolderBase]: 1558/2914 cut-off events. [2023-08-27 01:33:17,224 INFO L125 PetriNetUnfolderBase]: For 43155/43155 co-relation queries the response was YES. [2023-08-27 01:33:17,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22095 conditions, 2914 events. 1558/2914 cut-off events. For 43155/43155 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 18352 event pairs, 344 based on Foata normal form. 6/2919 useless extension candidates. Maximal degree in co-relation 22016. Up to 1004 conditions per place. [2023-08-27 01:33:17,251 INFO L140 encePairwiseOnDemand]: 306/318 looper letters, 360 selfloop transitions, 134 changer transitions 36/530 dead transitions. [2023-08-27 01:33:17,251 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 530 transitions, 8115 flow [2023-08-27 01:33:17,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-08-27 01:33:17,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-08-27 01:33:17,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 3563 transitions. [2023-08-27 01:33:17,255 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30282168961414246 [2023-08-27 01:33:17,255 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 3563 transitions. [2023-08-27 01:33:17,255 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 3563 transitions. [2023-08-27 01:33:17,256 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:33:17,256 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 3563 transitions. [2023-08-27 01:33:17,259 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 96.29729729729729) internal successors, (3563), 37 states have internal predecessors, (3563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:33:17,266 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 318.0) internal successors, (12084), 38 states have internal predecessors, (12084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:33:17,267 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 318.0) internal successors, (12084), 38 states have internal predecessors, (12084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:33:17,267 INFO L175 Difference]: Start difference. First operand has 257 places, 345 transitions, 5851 flow. Second operand 37 states and 3563 transitions. [2023-08-27 01:33:17,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 530 transitions, 8115 flow [2023-08-27 01:33:17,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 530 transitions, 7965 flow, removed 20 selfloop flow, removed 16 redundant places. [2023-08-27 01:33:17,480 INFO L231 Difference]: Finished difference. Result has 281 places, 349 transitions, 6073 flow [2023-08-27 01:33:17,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=5724, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=6073, PETRI_PLACES=281, PETRI_TRANSITIONS=349} [2023-08-27 01:33:17,480 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 240 predicate places. [2023-08-27 01:33:17,480 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 349 transitions, 6073 flow [2023-08-27 01:33:17,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 90.725) internal successors, (3629), 40 states have internal predecessors, (3629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:33:17,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:33:17,481 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:33:17,487 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-08-27 01:33:17,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:33:17,682 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-08-27 01:33:17,682 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:33:17,682 INFO L85 PathProgramCache]: Analyzing trace with hash 1451771089, now seen corresponding path program 7 times [2023-08-27 01:33:17,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:33:17,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890620679] [2023-08-27 01:33:17,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:33:17,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:33:17,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:33:23,210 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:33:23,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:33:23,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890620679] [2023-08-27 01:33:23,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890620679] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:33:23,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119956385] [2023-08-27 01:33:23,211 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-27 01:33:23,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:33:23,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:33:23,212 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 01:33:23,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-08-27 01:33:23,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:33:23,371 INFO L262 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 45 conjunts are in the unsatisfiable core [2023-08-27 01:33:23,372 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:33:26,474 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:33:26,474 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:33:27,676 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:33:27,677 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 60 [2023-08-27 01:33:32,797 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:33:32,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119956385] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:33:32,798 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:33:32,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 33 [2023-08-27 01:33:32,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137764987] [2023-08-27 01:33:32,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:33:32,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-08-27 01:33:32,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:33:32,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-08-27 01:33:32,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1016, Unknown=0, NotChecked=0, Total=1190 [2023-08-27 01:33:32,800 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 318 [2023-08-27 01:33:32,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 349 transitions, 6073 flow. Second operand has 35 states, 35 states have (on average 100.97142857142858) internal successors, (3534), 35 states have internal predecessors, (3534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:33:32,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:33:32,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 318 [2023-08-27 01:33:32,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:33:52,594 INFO L124 PetriNetUnfolderBase]: 1870/3321 cut-off events. [2023-08-27 01:33:52,594 INFO L125 PetriNetUnfolderBase]: For 55338/55338 co-relation queries the response was YES. [2023-08-27 01:33:52,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26525 conditions, 3321 events. 1870/3321 cut-off events. For 55338/55338 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 20139 event pairs, 306 based on Foata normal form. 3/3323 useless extension candidates. Maximal degree in co-relation 26442. Up to 689 conditions per place. [2023-08-27 01:33:52,624 INFO L140 encePairwiseOnDemand]: 305/318 looper letters, 292 selfloop transitions, 235 changer transitions 39/566 dead transitions. [2023-08-27 01:33:52,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 566 transitions, 9470 flow [2023-08-27 01:33:52,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-08-27 01:33:52,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-08-27 01:33:52,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 3106 transitions. [2023-08-27 01:33:52,627 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33680329646497503 [2023-08-27 01:33:52,627 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 3106 transitions. [2023-08-27 01:33:52,627 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 3106 transitions. [2023-08-27 01:33:52,628 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:33:52,628 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 3106 transitions. [2023-08-27 01:33:52,630 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 107.10344827586206) internal successors, (3106), 29 states have internal predecessors, (3106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:33:52,634 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 318.0) internal successors, (9540), 30 states have internal predecessors, (9540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:33:52,635 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 318.0) internal successors, (9540), 30 states have internal predecessors, (9540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:33:52,635 INFO L175 Difference]: Start difference. First operand has 281 places, 349 transitions, 6073 flow. Second operand 29 states and 3106 transitions. [2023-08-27 01:33:52,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 566 transitions, 9470 flow [2023-08-27 01:33:52,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 566 transitions, 9225 flow, removed 40 selfloop flow, removed 20 redundant places. [2023-08-27 01:33:52,848 INFO L231 Difference]: Finished difference. Result has 292 places, 429 transitions, 8053 flow [2023-08-27 01:33:52,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=5875, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=8053, PETRI_PLACES=292, PETRI_TRANSITIONS=429} [2023-08-27 01:33:52,849 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 251 predicate places. [2023-08-27 01:33:52,849 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 429 transitions, 8053 flow [2023-08-27 01:33:52,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 100.97142857142858) internal successors, (3534), 35 states have internal predecessors, (3534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:33:52,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:33:52,850 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:33:52,854 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-08-27 01:33:53,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2023-08-27 01:33:53,050 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-08-27 01:33:53,051 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:33:53,051 INFO L85 PathProgramCache]: Analyzing trace with hash 1531732463, now seen corresponding path program 8 times [2023-08-27 01:33:53,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:33:53,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242056421] [2023-08-27 01:33:53,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:33:53,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:33:53,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:33:58,239 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:33:58,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:33:58,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242056421] [2023-08-27 01:33:58,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242056421] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:33:58,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482288457] [2023-08-27 01:33:58,239 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 01:33:58,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:33:58,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:33:58,240 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 01:33:58,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-08-27 01:33:58,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 01:33:58,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:33:58,411 INFO L262 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 45 conjunts are in the unsatisfiable core [2023-08-27 01:33:58,412 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:34:01,445 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:34:01,445 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:34:02,390 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:34:02,390 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 60 [2023-08-27 01:34:06,340 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 01:34:06,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482288457] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:34:06,341 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:34:06,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 32 [2023-08-27 01:34:06,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518735] [2023-08-27 01:34:06,341 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:34:06,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-08-27 01:34:06,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:34:06,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-08-27 01:34:06,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=948, Unknown=0, NotChecked=0, Total=1122 [2023-08-27 01:34:06,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 318 [2023-08-27 01:34:06,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 429 transitions, 8053 flow. Second operand has 34 states, 34 states have (on average 100.8529411764706) internal successors, (3429), 34 states have internal predecessors, (3429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:34:06,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:34:06,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 318 [2023-08-27 01:34:06,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:34:33,790 INFO L124 PetriNetUnfolderBase]: 1918/3435 cut-off events. [2023-08-27 01:34:33,790 INFO L125 PetriNetUnfolderBase]: For 63610/63610 co-relation queries the response was YES. [2023-08-27 01:34:33,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28632 conditions, 3435 events. 1918/3435 cut-off events. For 63610/63610 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 21366 event pairs, 209 based on Foata normal form. 3/3437 useless extension candidates. Maximal degree in co-relation 28547. Up to 626 conditions per place. [2023-08-27 01:34:33,841 INFO L140 encePairwiseOnDemand]: 304/318 looper letters, 264 selfloop transitions, 287 changer transitions 33/584 dead transitions. [2023-08-27 01:34:33,841 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 584 transitions, 10375 flow [2023-08-27 01:34:33,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-08-27 01:34:33,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-08-27 01:34:33,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 3620 transitions. [2023-08-27 01:34:33,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3348131705512394 [2023-08-27 01:34:33,846 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 3620 transitions. [2023-08-27 01:34:33,846 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 3620 transitions. [2023-08-27 01:34:33,846 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:34:33,846 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 3620 transitions. [2023-08-27 01:34:33,850 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 106.47058823529412) internal successors, (3620), 34 states have internal predecessors, (3620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:34:33,856 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 318.0) internal successors, (11130), 35 states have internal predecessors, (11130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:34:33,857 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 318.0) internal successors, (11130), 35 states have internal predecessors, (11130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:34:33,858 INFO L175 Difference]: Start difference. First operand has 292 places, 429 transitions, 8053 flow. Second operand 34 states and 3620 transitions. [2023-08-27 01:34:33,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 584 transitions, 10375 flow [2023-08-27 01:34:34,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 584 transitions, 9990 flow, removed 144 selfloop flow, removed 10 redundant places. [2023-08-27 01:34:34,214 INFO L231 Difference]: Finished difference. Result has 322 places, 454 transitions, 9029 flow [2023-08-27 01:34:34,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=7686, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=262, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=9029, PETRI_PLACES=322, PETRI_TRANSITIONS=454} [2023-08-27 01:34:34,214 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 281 predicate places. [2023-08-27 01:34:34,214 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 454 transitions, 9029 flow [2023-08-27 01:34:34,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 100.8529411764706) internal successors, (3429), 34 states have internal predecessors, (3429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:34:34,215 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:34:34,215 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:34:34,220 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-08-27 01:34:34,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:34:34,416 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-08-27 01:34:34,416 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:34:34,416 INFO L85 PathProgramCache]: Analyzing trace with hash 461272859, now seen corresponding path program 9 times [2023-08-27 01:34:34,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:34:34,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618618475] [2023-08-27 01:34:34,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:34:34,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:34:34,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:34:39,391 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:34:39,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:34:39,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618618475] [2023-08-27 01:34:39,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618618475] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:34:39,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558096039] [2023-08-27 01:34:39,391 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 01:34:39,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:34:39,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:34:39,392 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 01:34:39,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-08-27 01:34:39,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-27 01:34:39,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:34:39,609 INFO L262 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 35 conjunts are in the unsatisfiable core [2023-08-27 01:34:39,610 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:34:41,719 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 01:34:41,720 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:34:42,770 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:34:42,770 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 60 treesize of output 62 [2023-08-27 01:34:44,812 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 01:34:44,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558096039] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:34:44,812 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:34:44,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 8] total 26 [2023-08-27 01:34:44,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201571028] [2023-08-27 01:34:44,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:34:44,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-27 01:34:44,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:34:44,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-27 01:34:44,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=675, Unknown=0, NotChecked=0, Total=756 [2023-08-27 01:34:44,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 318 [2023-08-27 01:34:44,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 454 transitions, 9029 flow. Second operand has 28 states, 28 states have (on average 100.92857142857143) internal successors, (2826), 28 states have internal predecessors, (2826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:34:44,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:34:44,815 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 318 [2023-08-27 01:34:44,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:35:00,101 INFO L124 PetriNetUnfolderBase]: 1972/3552 cut-off events. [2023-08-27 01:35:00,101 INFO L125 PetriNetUnfolderBase]: For 74919/74919 co-relation queries the response was YES. [2023-08-27 01:35:00,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30250 conditions, 3552 events. 1972/3552 cut-off events. For 74919/74919 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 22335 event pairs, 320 based on Foata normal form. 3/3550 useless extension candidates. Maximal degree in co-relation 30158. Up to 951 conditions per place. [2023-08-27 01:35:00,140 INFO L140 encePairwiseOnDemand]: 305/318 looper letters, 320 selfloop transitions, 254 changer transitions 26/600 dead transitions. [2023-08-27 01:35:00,141 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 600 transitions, 11433 flow [2023-08-27 01:35:00,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-08-27 01:35:00,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-08-27 01:35:00,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 3498 transitions. [2023-08-27 01:35:00,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2023-08-27 01:35:00,144 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 3498 transitions. [2023-08-27 01:35:00,144 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 3498 transitions. [2023-08-27 01:35:00,144 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:35:00,144 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 3498 transitions. [2023-08-27 01:35:00,154 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 106.0) internal successors, (3498), 33 states have internal predecessors, (3498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:35:00,159 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 318.0) internal successors, (10812), 34 states have internal predecessors, (10812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:35:00,159 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 318.0) internal successors, (10812), 34 states have internal predecessors, (10812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:35:00,159 INFO L175 Difference]: Start difference. First operand has 322 places, 454 transitions, 9029 flow. Second operand 33 states and 3498 transitions. [2023-08-27 01:35:00,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 600 transitions, 11433 flow [2023-08-27 01:35:00,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 600 transitions, 11102 flow, removed 31 selfloop flow, removed 21 redundant places. [2023-08-27 01:35:00,574 INFO L231 Difference]: Finished difference. Result has 340 places, 487 transitions, 10040 flow [2023-08-27 01:35:00,575 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=8704, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=224, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=10040, PETRI_PLACES=340, PETRI_TRANSITIONS=487} [2023-08-27 01:35:00,575 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 299 predicate places. [2023-08-27 01:35:00,575 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 487 transitions, 10040 flow [2023-08-27 01:35:00,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 100.92857142857143) internal successors, (2826), 28 states have internal predecessors, (2826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:35:00,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:35:00,576 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:35:00,584 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-08-27 01:35:00,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2023-08-27 01:35:00,784 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-08-27 01:35:00,784 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:35:00,784 INFO L85 PathProgramCache]: Analyzing trace with hash -732693643, now seen corresponding path program 10 times [2023-08-27 01:35:00,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:35:00,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675255302] [2023-08-27 01:35:00,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:35:00,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:35:00,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:35:04,792 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:35:04,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:35:04,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675255302] [2023-08-27 01:35:04,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675255302] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:35:04,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396210337] [2023-08-27 01:35:04,792 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 01:35:04,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:35:04,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:35:04,793 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 01:35:04,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-08-27 01:35:04,956 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 01:35:04,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:35:04,957 INFO L262 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 42 conjunts are in the unsatisfiable core [2023-08-27 01:35:04,958 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:35:06,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 01:35:06,858 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 23 treesize of output 25 [2023-08-27 01:35:07,666 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 01:35:07,667 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:35:08,360 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1989 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1989) c_~queue~0.base))) (or (let ((.cse1 (* c_~start~0 4))) (= (mod (select .cse0 (+ .cse1 c_~queue~0.offset)) 4294967296) (mod (select .cse0 (+ .cse1 c_~queue~0.offset 4)) 4294967296))) (not (= (mod |c_thread2Thread1of1ForFork2_~x~1#1| 4294967296) (mod (select .cse0 (+ (* c_~end~0 4) c_~queue~0.offset)) 4294967296)))))) is different from false [2023-08-27 01:35:08,576 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:35:08,577 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 112 treesize of output 114 [2023-08-27 01:35:08,704 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:35:08,704 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 56 [2023-08-27 01:35:11,814 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 01:35:11,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396210337] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:35:11,815 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:35:11,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 9] total 31 [2023-08-27 01:35:11,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90511305] [2023-08-27 01:35:11,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:35:11,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-27 01:35:11,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:35:11,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-27 01:35:11,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=893, Unknown=1, NotChecked=60, Total=1056 [2023-08-27 01:35:11,817 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 318 [2023-08-27 01:35:11,818 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 487 transitions, 10040 flow. Second operand has 33 states, 33 states have (on average 97.03030303030303) internal successors, (3202), 33 states have internal predecessors, (3202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:35:11,818 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:35:11,818 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 318 [2023-08-27 01:35:11,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:35:29,170 INFO L124 PetriNetUnfolderBase]: 1996/3612 cut-off events. [2023-08-27 01:35:29,171 INFO L125 PetriNetUnfolderBase]: For 80468/80468 co-relation queries the response was YES. [2023-08-27 01:35:29,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31771 conditions, 3612 events. 1996/3612 cut-off events. For 80468/80468 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 22949 event pairs, 412 based on Foata normal form. 3/3610 useless extension candidates. Maximal degree in co-relation 31672. Up to 1970 conditions per place. [2023-08-27 01:35:29,213 INFO L140 encePairwiseOnDemand]: 306/318 looper letters, 381 selfloop transitions, 165 changer transitions 30/576 dead transitions. [2023-08-27 01:35:29,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 576 transitions, 11768 flow [2023-08-27 01:35:29,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-27 01:35:29,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-27 01:35:29,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 2553 transitions. [2023-08-27 01:35:29,215 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3211320754716981 [2023-08-27 01:35:29,215 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 2553 transitions. [2023-08-27 01:35:29,215 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 2553 transitions. [2023-08-27 01:35:29,215 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:35:29,215 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 2553 transitions. [2023-08-27 01:35:29,217 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 102.12) internal successors, (2553), 25 states have internal predecessors, (2553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:35:29,294 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 318.0) internal successors, (8268), 26 states have internal predecessors, (8268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:35:29,294 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 318.0) internal successors, (8268), 26 states have internal predecessors, (8268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:35:29,294 INFO L175 Difference]: Start difference. First operand has 340 places, 487 transitions, 10040 flow. Second operand 25 states and 2553 transitions. [2023-08-27 01:35:29,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 576 transitions, 11768 flow [2023-08-27 01:35:29,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 576 transitions, 11453 flow, removed 78 selfloop flow, removed 16 redundant places. [2023-08-27 01:35:29,681 INFO L231 Difference]: Finished difference. Result has 352 places, 490 transitions, 10234 flow [2023-08-27 01:35:29,681 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=9747, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=487, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=10234, PETRI_PLACES=352, PETRI_TRANSITIONS=490} [2023-08-27 01:35:29,682 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 311 predicate places. [2023-08-27 01:35:29,682 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 490 transitions, 10234 flow [2023-08-27 01:35:29,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 97.03030303030303) internal successors, (3202), 33 states have internal predecessors, (3202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:35:29,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:35:29,682 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:35:29,690 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-08-27 01:35:29,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:35:29,888 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-08-27 01:35:29,888 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:35:29,888 INFO L85 PathProgramCache]: Analyzing trace with hash 572870543, now seen corresponding path program 11 times [2023-08-27 01:35:29,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:35:29,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924931140] [2023-08-27 01:35:29,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:35:29,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:35:29,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:35:34,186 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:35:34,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:35:34,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924931140] [2023-08-27 01:35:34,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924931140] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:35:34,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883444342] [2023-08-27 01:35:34,186 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-27 01:35:34,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:35:34,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:35:34,187 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 01:35:34,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-08-27 01:35:34,354 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 01:35:34,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:35:34,355 INFO L262 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 50 conjunts are in the unsatisfiable core [2023-08-27 01:35:34,357 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:35:36,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 01:35:36,930 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-08-27 01:35:37,960 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:35:37,961 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 104 treesize of output 56 [2023-08-27 01:35:38,212 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:35:38,213 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:35:39,965 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:35:39,966 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 116 treesize of output 118 [2023-08-27 01:35:40,082 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:35:40,083 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 62 treesize of output 60 [2023-08-27 01:35:43,662 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:35:43,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883444342] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:35:43,662 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:35:43,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 35 [2023-08-27 01:35:43,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689953195] [2023-08-27 01:35:43,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:35:43,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-08-27 01:35:43,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:35:43,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-08-27 01:35:43,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1153, Unknown=1, NotChecked=0, Total=1332 [2023-08-27 01:35:43,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 318 [2023-08-27 01:35:43,667 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 490 transitions, 10234 flow. Second operand has 37 states, 37 states have (on average 90.64864864864865) internal successors, (3354), 37 states have internal predecessors, (3354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:35:43,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:35:43,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 318 [2023-08-27 01:35:43,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:36:15,268 INFO L124 PetriNetUnfolderBase]: 2078/3827 cut-off events. [2023-08-27 01:36:15,269 INFO L125 PetriNetUnfolderBase]: For 87476/87476 co-relation queries the response was YES. [2023-08-27 01:36:15,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33813 conditions, 3827 events. 2078/3827 cut-off events. For 87476/87476 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 25115 event pairs, 398 based on Foata normal form. 7/3829 useless extension candidates. Maximal degree in co-relation 33709. Up to 869 conditions per place. [2023-08-27 01:36:15,315 INFO L140 encePairwiseOnDemand]: 305/318 looper letters, 424 selfloop transitions, 197 changer transitions 58/679 dead transitions. [2023-08-27 01:36:15,315 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 679 transitions, 13206 flow [2023-08-27 01:36:15,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-08-27 01:36:15,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-08-27 01:36:15,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 3441 transitions. [2023-08-27 01:36:15,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30057651991614254 [2023-08-27 01:36:15,318 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 3441 transitions. [2023-08-27 01:36:15,318 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 3441 transitions. [2023-08-27 01:36:15,318 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:36:15,318 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 3441 transitions. [2023-08-27 01:36:15,321 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 95.58333333333333) internal successors, (3441), 36 states have internal predecessors, (3441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:36:15,403 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 318.0) internal successors, (11766), 37 states have internal predecessors, (11766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:36:15,404 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 318.0) internal successors, (11766), 37 states have internal predecessors, (11766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:36:15,404 INFO L175 Difference]: Start difference. First operand has 352 places, 490 transitions, 10234 flow. Second operand 36 states and 3441 transitions. [2023-08-27 01:36:15,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 679 transitions, 13206 flow [2023-08-27 01:36:15,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 679 transitions, 12854 flow, removed 24 selfloop flow, removed 23 redundant places. [2023-08-27 01:36:15,818 INFO L231 Difference]: Finished difference. Result has 380 places, 527 transitions, 10918 flow [2023-08-27 01:36:15,818 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=9945, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=10918, PETRI_PLACES=380, PETRI_TRANSITIONS=527} [2023-08-27 01:36:15,819 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 339 predicate places. [2023-08-27 01:36:15,819 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 527 transitions, 10918 flow [2023-08-27 01:36:15,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 90.64864864864865) internal successors, (3354), 37 states have internal predecessors, (3354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:36:15,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:36:15,819 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:36:15,826 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2023-08-27 01:36:16,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2023-08-27 01:36:16,025 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-08-27 01:36:16,025 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:36:16,025 INFO L85 PathProgramCache]: Analyzing trace with hash 1869062859, now seen corresponding path program 12 times [2023-08-27 01:36:16,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:36:16,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875900873] [2023-08-27 01:36:16,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:36:16,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:36:16,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:36:19,919 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:36:19,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:36:19,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875900873] [2023-08-27 01:36:19,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875900873] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:36:19,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734183458] [2023-08-27 01:36:19,919 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-27 01:36:19,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:36:19,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:36:19,925 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 01:36:19,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-08-27 01:36:20,126 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-27 01:36:20,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:36:20,128 INFO L262 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 55 conjunts are in the unsatisfiable core [2023-08-27 01:36:20,129 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:36:20,699 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-27 01:36:20,946 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-27 01:36:21,236 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-27 01:36:23,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 01:36:23,164 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 31 [2023-08-27 01:36:23,759 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:36:23,760 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:36:28,883 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:36:28,883 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 130 treesize of output 94 [2023-08-27 01:36:29,187 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:36:29,188 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 4156 treesize of output 3886 [2023-08-27 01:36:29,510 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:36:29,510 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 212 treesize of output 222 [2023-08-27 01:36:29,749 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:36:29,750 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 186 treesize of output 170 [2023-08-27 01:36:31,885 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:36:31,885 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 110 treesize of output 58 [2023-08-27 01:36:32,690 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:36:32,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734183458] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:36:32,690 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:36:32,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 38 [2023-08-27 01:36:32,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141820272] [2023-08-27 01:36:32,691 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:36:32,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-08-27 01:36:32,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:36:32,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-08-27 01:36:32,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1379, Unknown=5, NotChecked=0, Total=1560 [2023-08-27 01:36:32,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 318 [2023-08-27 01:36:32,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 527 transitions, 10918 flow. Second operand has 40 states, 40 states have (on average 90.725) internal successors, (3629), 40 states have internal predecessors, (3629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:36:32,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:36:32,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 318 [2023-08-27 01:36:32,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:37:02,680 WARN L234 SmtUtils]: Spent 7.87s on a formula simplification. DAG size of input: 105 DAG size of output: 105 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 01:37:04,765 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 01:37:20,635 WARN L234 SmtUtils]: Spent 7.95s on a formula simplification. DAG size of input: 111 DAG size of output: 111 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 01:37:27,903 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 01:37:51,038 INFO L124 PetriNetUnfolderBase]: 2512/4366 cut-off events. [2023-08-27 01:37:51,039 INFO L125 PetriNetUnfolderBase]: For 115242/115242 co-relation queries the response was YES. [2023-08-27 01:37:51,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40533 conditions, 4366 events. 2512/4366 cut-off events. For 115242/115242 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 27534 event pairs, 308 based on Foata normal form. 3/4361 useless extension candidates. Maximal degree in co-relation 40415. Up to 1384 conditions per place. [2023-08-27 01:37:51,093 INFO L140 encePairwiseOnDemand]: 303/318 looper letters, 549 selfloop transitions, 372 changer transitions 51/972 dead transitions. [2023-08-27 01:37:51,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 426 places, 972 transitions, 19152 flow [2023-08-27 01:37:51,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2023-08-27 01:37:51,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2023-08-27 01:37:51,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 5220 transitions. [2023-08-27 01:37:51,097 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29845626072041165 [2023-08-27 01:37:51,097 INFO L72 ComplementDD]: Start complementDD. Operand 55 states and 5220 transitions. [2023-08-27 01:37:51,097 INFO L73 IsDeterministic]: Start isDeterministic. Operand 55 states and 5220 transitions. [2023-08-27 01:37:51,097 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:37:51,098 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 55 states and 5220 transitions. [2023-08-27 01:37:51,101 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 56 states, 55 states have (on average 94.9090909090909) internal successors, (5220), 55 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 01:37:51,110 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 56 states, 56 states have (on average 318.0) internal successors, (17808), 56 states have internal predecessors, (17808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:37:51,111 INFO L81 ComplementDD]: Finished complementDD. Result has 56 states, 56 states have (on average 318.0) internal successors, (17808), 56 states have internal predecessors, (17808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:37:51,111 INFO L175 Difference]: Start difference. First operand has 380 places, 527 transitions, 10918 flow. Second operand 55 states and 5220 transitions. [2023-08-27 01:37:51,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 426 places, 972 transitions, 19152 flow [2023-08-27 01:37:51,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 972 transitions, 18818 flow, removed 47 selfloop flow, removed 22 redundant places. [2023-08-27 01:37:51,794 INFO L231 Difference]: Finished difference. Result has 431 places, 695 transitions, 15687 flow [2023-08-27 01:37:51,794 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=10622, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=527, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=229, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=55, PETRI_FLOW=15687, PETRI_PLACES=431, PETRI_TRANSITIONS=695} [2023-08-27 01:37:51,795 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 390 predicate places. [2023-08-27 01:37:51,795 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 695 transitions, 15687 flow [2023-08-27 01:37:51,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 90.725) internal successors, (3629), 40 states have internal predecessors, (3629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:37:51,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:37:51,796 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:37:51,801 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2023-08-27 01:37:51,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2023-08-27 01:37:51,996 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-08-27 01:37:51,997 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:37:51,997 INFO L85 PathProgramCache]: Analyzing trace with hash -658507077, now seen corresponding path program 13 times [2023-08-27 01:37:51,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:37:51,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994267622] [2023-08-27 01:37:51,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:37:51,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:37:52,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:37:56,371 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:37:56,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:37:56,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994267622] [2023-08-27 01:37:56,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994267622] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:37:56,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572815789] [2023-08-27 01:37:56,371 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-27 01:37:56,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:37:56,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:37:56,372 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 01:37:56,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-08-27 01:37:56,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:37:56,545 INFO L262 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 45 conjunts are in the unsatisfiable core [2023-08-27 01:37:56,546 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:37:59,756 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:37:59,756 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:38:00,867 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:38:00,867 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 60 [2023-08-27 01:38:04,028 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:38:04,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572815789] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:38:04,028 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:38:04,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 34 [2023-08-27 01:38:04,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377630154] [2023-08-27 01:38:04,029 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:38:04,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-08-27 01:38:04,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:38:04,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-08-27 01:38:04,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1077, Unknown=0, NotChecked=0, Total=1260 [2023-08-27 01:38:04,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 318 [2023-08-27 01:38:04,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 695 transitions, 15687 flow. Second operand has 36 states, 36 states have (on average 100.91666666666667) internal successors, (3633), 36 states have internal predecessors, (3633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:38:04,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:38:04,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 318 [2023-08-27 01:38:04,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:38:35,472 INFO L124 PetriNetUnfolderBase]: 3166/5249 cut-off events. [2023-08-27 01:38:35,472 INFO L125 PetriNetUnfolderBase]: For 147900/147900 co-relation queries the response was YES. [2023-08-27 01:38:35,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51910 conditions, 5249 events. 3166/5249 cut-off events. For 147900/147900 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 31965 event pairs, 286 based on Foata normal form. 3/5243 useless extension candidates. Maximal degree in co-relation 51772. Up to 980 conditions per place. [2023-08-27 01:38:35,541 INFO L140 encePairwiseOnDemand]: 304/318 looper letters, 408 selfloop transitions, 607 changer transitions 34/1049 dead transitions. [2023-08-27 01:38:35,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 463 places, 1049 transitions, 23273 flow [2023-08-27 01:38:35,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-08-27 01:38:35,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2023-08-27 01:38:35,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 4462 transitions. [2023-08-27 01:38:35,544 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33408206049715483 [2023-08-27 01:38:35,544 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 4462 transitions. [2023-08-27 01:38:35,544 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 4462 transitions. [2023-08-27 01:38:35,545 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:38:35,545 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 4462 transitions. [2023-08-27 01:38:35,547 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 106.23809523809524) internal successors, (4462), 42 states have internal predecessors, (4462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:38:35,552 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 318.0) internal successors, (13674), 43 states have internal predecessors, (13674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:38:35,553 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 318.0) internal successors, (13674), 43 states have internal predecessors, (13674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:38:35,553 INFO L175 Difference]: Start difference. First operand has 431 places, 695 transitions, 15687 flow. Second operand 42 states and 4462 transitions. [2023-08-27 01:38:35,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 463 places, 1049 transitions, 23273 flow [2023-08-27 01:38:36,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 1049 transitions, 22438 flow, removed 379 selfloop flow, removed 22 redundant places. [2023-08-27 01:38:36,809 INFO L231 Difference]: Finished difference. Result has 460 places, 863 transitions, 21150 flow [2023-08-27 01:38:36,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=15229, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=695, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=441, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=21150, PETRI_PLACES=460, PETRI_TRANSITIONS=863} [2023-08-27 01:38:36,810 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 419 predicate places. [2023-08-27 01:38:36,810 INFO L495 AbstractCegarLoop]: Abstraction has has 460 places, 863 transitions, 21150 flow [2023-08-27 01:38:36,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 100.91666666666667) internal successors, (3633), 36 states have internal predecessors, (3633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:38:36,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:38:36,810 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:38:36,817 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2023-08-27 01:38:37,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2023-08-27 01:38:37,012 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-08-27 01:38:37,013 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:38:37,013 INFO L85 PathProgramCache]: Analyzing trace with hash -404112007, now seen corresponding path program 14 times [2023-08-27 01:38:37,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:38:37,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144386194] [2023-08-27 01:38:37,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:38:37,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:38:37,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:38:42,138 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:38:42,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:38:42,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144386194] [2023-08-27 01:38:42,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144386194] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:38:42,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543979155] [2023-08-27 01:38:42,138 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 01:38:42,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:38:42,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:38:42,141 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 01:38:42,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-08-27 01:38:42,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 01:38:42,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:38:42,327 INFO L262 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 35 conjunts are in the unsatisfiable core [2023-08-27 01:38:42,328 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:38:44,245 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 01:38:44,246 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:38:45,185 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:38:45,185 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 60 treesize of output 62 [2023-08-27 01:38:47,400 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 01:38:47,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543979155] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:38:47,400 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:38:47,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 8] total 26 [2023-08-27 01:38:47,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388186369] [2023-08-27 01:38:47,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:38:47,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-27 01:38:47,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:38:47,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-27 01:38:47,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2023-08-27 01:38:47,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 318 [2023-08-27 01:38:47,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 460 places, 863 transitions, 21150 flow. Second operand has 28 states, 28 states have (on average 100.92857142857143) internal successors, (2826), 28 states have internal predecessors, (2826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:38:47,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:38:47,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 318 [2023-08-27 01:38:47,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:39:07,139 INFO L124 PetriNetUnfolderBase]: 3191/5309 cut-off events. [2023-08-27 01:39:07,139 INFO L125 PetriNetUnfolderBase]: For 163788/163788 co-relation queries the response was YES. [2023-08-27 01:39:07,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54676 conditions, 5309 events. 3191/5309 cut-off events. For 163788/163788 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 32626 event pairs, 297 based on Foata normal form. 2/5302 useless extension candidates. Maximal degree in co-relation 54528. Up to 938 conditions per place. [2023-08-27 01:39:07,213 INFO L140 encePairwiseOnDemand]: 304/318 looper letters, 436 selfloop transitions, 557 changer transitions 26/1019 dead transitions. [2023-08-27 01:39:07,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 485 places, 1019 transitions, 24674 flow [2023-08-27 01:39:07,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-27 01:39:07,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-27 01:39:07,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 2985 transitions. [2023-08-27 01:39:07,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33524258760107817 [2023-08-27 01:39:07,216 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 2985 transitions. [2023-08-27 01:39:07,216 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 2985 transitions. [2023-08-27 01:39:07,216 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:39:07,216 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 2985 transitions. [2023-08-27 01:39:07,218 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 106.60714285714286) internal successors, (2985), 28 states have internal predecessors, (2985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:39:07,222 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 318.0) internal successors, (9222), 29 states have internal predecessors, (9222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:39:07,222 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 318.0) internal successors, (9222), 29 states have internal predecessors, (9222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:39:07,222 INFO L175 Difference]: Start difference. First operand has 460 places, 863 transitions, 21150 flow. Second operand 28 states and 2985 transitions. [2023-08-27 01:39:07,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 485 places, 1019 transitions, 24674 flow [2023-08-27 01:39:08,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 463 places, 1019 transitions, 23776 flow, removed 143 selfloop flow, removed 22 redundant places. [2023-08-27 01:39:08,601 INFO L231 Difference]: Finished difference. Result has 470 places, 887 transitions, 22250 flow [2023-08-27 01:39:08,602 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=20266, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=863, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=535, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=22250, PETRI_PLACES=470, PETRI_TRANSITIONS=887} [2023-08-27 01:39:08,602 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 429 predicate places. [2023-08-27 01:39:08,602 INFO L495 AbstractCegarLoop]: Abstraction has has 470 places, 887 transitions, 22250 flow [2023-08-27 01:39:08,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 100.92857142857143) internal successors, (2826), 28 states have internal predecessors, (2826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:39:08,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:39:08,603 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:39:08,608 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2023-08-27 01:39:08,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2023-08-27 01:39:08,803 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-08-27 01:39:08,804 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:39:08,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1604288025, now seen corresponding path program 15 times [2023-08-27 01:39:08,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:39:08,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618703675] [2023-08-27 01:39:08,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:39:08,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:39:08,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:39:13,707 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:39:13,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:39:13,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618703675] [2023-08-27 01:39:13,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618703675] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:39:13,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783704548] [2023-08-27 01:39:13,708 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 01:39:13,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:39:13,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:39:13,709 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 01:39:13,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-08-27 01:39:13,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-27 01:39:13,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:39:13,915 INFO L262 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 33 conjunts are in the unsatisfiable core [2023-08-27 01:39:13,916 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:39:15,583 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 01:39:15,583 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:39:16,292 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:39:16,292 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 60 [2023-08-27 01:39:24,075 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 01:39:24,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783704548] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:39:24,076 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:39:24,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 8] total 27 [2023-08-27 01:39:24,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247741669] [2023-08-27 01:39:24,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:39:24,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-27 01:39:24,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:39:24,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-27 01:39:24,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=726, Unknown=0, NotChecked=0, Total=812 [2023-08-27 01:39:24,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 318 [2023-08-27 01:39:24,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 470 places, 887 transitions, 22250 flow. Second operand has 29 states, 29 states have (on average 90.86206896551724) internal successors, (2635), 29 states have internal predecessors, (2635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:39:24,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:39:24,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 318 [2023-08-27 01:39:24,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Received shutdown request... [2023-08-27 01:39:31,564 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-27 01:39:31,570 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-27 01:39:31,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-27 01:39:31,573 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (25 of 26 remaining) [2023-08-27 01:39:31,580 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2023-08-27 01:39:31,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:39:31,774 WARN L619 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (29states, 89/318 universal loopers) in iteration 51,while PetriNetUnfolder was constructing finite prefix that currently has 1096 conditions, 111 events (42/110 cut-off events. For 4089/4089 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 579 event pairs, 14 based on Foata normal form. 0/160 useless extension candidates. Maximal degree in co-relation 948. Up to 52 conditions per place.). [2023-08-27 01:39:31,775 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (24 of 26 remaining) [2023-08-27 01:39:31,775 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (23 of 26 remaining) [2023-08-27 01:39:31,775 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (22 of 26 remaining) [2023-08-27 01:39:31,775 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (21 of 26 remaining) [2023-08-27 01:39:31,775 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (20 of 26 remaining) [2023-08-27 01:39:31,776 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (19 of 26 remaining) [2023-08-27 01:39:31,776 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (18 of 26 remaining) [2023-08-27 01:39:31,776 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (17 of 26 remaining) [2023-08-27 01:39:31,776 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (16 of 26 remaining) [2023-08-27 01:39:31,776 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err5ASSERT_VIOLATIONINTEGER_OVERFLOW (15 of 26 remaining) [2023-08-27 01:39:31,776 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (14 of 26 remaining) [2023-08-27 01:39:31,776 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (13 of 26 remaining) [2023-08-27 01:39:31,776 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (12 of 26 remaining) [2023-08-27 01:39:31,776 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (11 of 26 remaining) [2023-08-27 01:39:31,776 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (10 of 26 remaining) [2023-08-27 01:39:31,776 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (9 of 26 remaining) [2023-08-27 01:39:31,776 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (8 of 26 remaining) [2023-08-27 01:39:31,776 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (7 of 26 remaining) [2023-08-27 01:39:31,777 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (6 of 26 remaining) [2023-08-27 01:39:31,777 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (5 of 26 remaining) [2023-08-27 01:39:31,777 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (4 of 26 remaining) [2023-08-27 01:39:31,777 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (3 of 26 remaining) [2023-08-27 01:39:31,777 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (2 of 26 remaining) [2023-08-27 01:39:31,777 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 26 remaining) [2023-08-27 01:39:31,777 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err5ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 26 remaining) [2023-08-27 01:39:31,777 INFO L445 BasicCegarLoop]: Path program histogram: [22, 15, 4, 3, 2, 1, 1, 1, 1, 1] [2023-08-27 01:39:31,780 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-27 01:39:31,780 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-27 01:39:31,782 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.08 01:39:31 BasicIcfg [2023-08-27 01:39:31,782 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-27 01:39:31,783 INFO L158 Benchmark]: Toolchain (without parser) took 807752.84ms. Allocated memory was 339.7MB in the beginning and 1.1GB in the end (delta: 767.6MB). Free memory was 298.9MB in the beginning and 376.8MB in the end (delta: -77.8MB). Peak memory consumption was 690.8MB. Max. memory is 16.0GB. [2023-08-27 01:39:31,783 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 339.7MB. Free memory was 317.7MB in the beginning and 317.6MB in the end (delta: 157.4kB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-27 01:39:31,783 INFO L158 Benchmark]: CACSL2BoogieTranslator took 218.85ms. Allocated memory is still 339.7MB. Free memory was 298.9MB in the beginning and 286.3MB in the end (delta: 12.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2023-08-27 01:39:31,783 INFO L158 Benchmark]: Boogie Procedure Inliner took 37.06ms. Allocated memory is still 339.7MB. Free memory was 286.3MB in the beginning and 284.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-27 01:39:31,783 INFO L158 Benchmark]: Boogie Preprocessor took 34.17ms. Allocated memory is still 339.7MB. Free memory was 284.2MB in the beginning and 283.2MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-27 01:39:31,783 INFO L158 Benchmark]: RCFGBuilder took 627.35ms. Allocated memory is still 339.7MB. Free memory was 283.2MB in the beginning and 245.4MB in the end (delta: 37.7MB). Peak memory consumption was 37.7MB. Max. memory is 16.0GB. [2023-08-27 01:39:31,784 INFO L158 Benchmark]: TraceAbstraction took 806830.40ms. Allocated memory was 339.7MB in the beginning and 1.1GB in the end (delta: 767.6MB). Free memory was 244.4MB in the beginning and 376.8MB in the end (delta: -132.4MB). Peak memory consumption was 638.3MB. Max. memory is 16.0GB. [2023-08-27 01:39:31,784 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 339.7MB. Free memory was 317.7MB in the beginning and 317.6MB in the end (delta: 157.4kB). There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 218.85ms. Allocated memory is still 339.7MB. Free memory was 298.9MB in the beginning and 286.3MB in the end (delta: 12.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 37.06ms. Allocated memory is still 339.7MB. Free memory was 286.3MB in the beginning and 284.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 34.17ms. Allocated memory is still 339.7MB. Free memory was 284.2MB in the beginning and 283.2MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 627.35ms. Allocated memory is still 339.7MB. Free memory was 283.2MB in the beginning and 245.4MB in the end (delta: 37.7MB). Peak memory consumption was 37.7MB. Max. memory is 16.0GB. * TraceAbstraction took 806830.40ms. Allocated memory was 339.7MB in the beginning and 1.1GB in the end (delta: 767.6MB). Free memory was 244.4MB in the beginning and 376.8MB in the end (delta: -132.4MB). Peak memory consumption was 638.3MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 5.7s, 156 PlacesBefore, 41 PlacesAfterwards, 155 TransitionsBefore, 34 TransitionsAfterwards, 2508 CoEnabledTransitionPairs, 8 FixpointIterations, 83 TrivialSequentialCompositions, 44 ConcurrentSequentialCompositions, 12 TrivialYvCompositions, 4 ConcurrentYvCompositions, 6 ChoiceCompositions, 149 TotalNumberOfCompositions, 2877 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 2334, independent: 2294, independent conditional: 0, independent unconditional: 2294, dependent: 40, dependent conditional: 0, dependent unconditional: 40, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1266, independent: 1254, independent conditional: 0, independent unconditional: 1254, dependent: 12, dependent conditional: 0, dependent unconditional: 12, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 2334, independent: 1040, independent conditional: 0, independent unconditional: 1040, dependent: 28, dependent conditional: 0, dependent unconditional: 28, unknown: 1266, unknown conditional: 0, unknown unconditional: 1266] , Statistics on independence cache: Total cache size (in pairs): 77, Positive cache size: 73, Positive conditional cache size: 0, Positive unconditional cache size: 73, Negative cache size: 4, Negative conditional cache size: 0, Negative unconditional cache size: 4, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 21]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (29states, 89/318 universal loopers) in iteration 51,while PetriNetUnfolder was constructing finite prefix that currently has 1096 conditions, 111 events (42/110 cut-off events. For 4089/4089 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 579 event pairs, 14 based on Foata normal form. 0/160 useless extension candidates. Maximal degree in co-relation 948. Up to 52 conditions per place.). - TimeoutResultAtElement [Line: 59]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (29states, 89/318 universal loopers) in iteration 51,while PetriNetUnfolder was constructing finite prefix that currently has 1096 conditions, 111 events (42/110 cut-off events. For 4089/4089 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 579 event pairs, 14 based on Foata normal form. 0/160 useless extension candidates. Maximal degree in co-relation 948. Up to 52 conditions per place.). - TimeoutResultAtElement [Line: 59]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (29states, 89/318 universal loopers) in iteration 51,while PetriNetUnfolder was constructing finite prefix that currently has 1096 conditions, 111 events (42/110 cut-off events. For 4089/4089 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 579 event pairs, 14 based on Foata normal form. 0/160 useless extension candidates. Maximal degree in co-relation 948. Up to 52 conditions per place.). - TimeoutResultAtElement [Line: 75]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (29states, 89/318 universal loopers) in iteration 51,while PetriNetUnfolder was constructing finite prefix that currently has 1096 conditions, 111 events (42/110 cut-off events. For 4089/4089 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 579 event pairs, 14 based on Foata normal form. 0/160 useless extension candidates. Maximal degree in co-relation 948. Up to 52 conditions per place.). - TimeoutResultAtElement [Line: 75]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (29states, 89/318 universal loopers) in iteration 51,while PetriNetUnfolder was constructing finite prefix that currently has 1096 conditions, 111 events (42/110 cut-off events. For 4089/4089 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 579 event pairs, 14 based on Foata normal form. 0/160 useless extension candidates. Maximal degree in co-relation 948. Up to 52 conditions per place.). - TimeoutResultAtElement [Line: 83]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (29states, 89/318 universal loopers) in iteration 51,while PetriNetUnfolder was constructing finite prefix that currently has 1096 conditions, 111 events (42/110 cut-off events. For 4089/4089 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 579 event pairs, 14 based on Foata normal form. 0/160 useless extension candidates. Maximal degree in co-relation 948. Up to 52 conditions per place.). - TimeoutResultAtElement [Line: 83]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (29states, 89/318 universal loopers) in iteration 51,while PetriNetUnfolder was constructing finite prefix that currently has 1096 conditions, 111 events (42/110 cut-off events. For 4089/4089 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 579 event pairs, 14 based on Foata normal form. 0/160 useless extension candidates. Maximal degree in co-relation 948. Up to 52 conditions per place.). - TimeoutResultAtElement [Line: 84]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (29states, 89/318 universal loopers) in iteration 51,while PetriNetUnfolder was constructing finite prefix that currently has 1096 conditions, 111 events (42/110 cut-off events. For 4089/4089 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 579 event pairs, 14 based on Foata normal form. 0/160 useless extension candidates. Maximal degree in co-relation 948. Up to 52 conditions per place.). - TimeoutResultAtElement [Line: 84]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (29states, 89/318 universal loopers) in iteration 51,while PetriNetUnfolder was constructing finite prefix that currently has 1096 conditions, 111 events (42/110 cut-off events. For 4089/4089 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 579 event pairs, 14 based on Foata normal form. 0/160 useless extension candidates. Maximal degree in co-relation 948. Up to 52 conditions per place.). - TimeoutResultAtElement [Line: 86]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (29states, 89/318 universal loopers) in iteration 51,while PetriNetUnfolder was constructing finite prefix that currently has 1096 conditions, 111 events (42/110 cut-off events. For 4089/4089 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 579 event pairs, 14 based on Foata normal form. 0/160 useless extension candidates. Maximal degree in co-relation 948. Up to 52 conditions per place.). - TimeoutResultAtElement [Line: 86]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (29states, 89/318 universal loopers) in iteration 51,while PetriNetUnfolder was constructing finite prefix that currently has 1096 conditions, 111 events (42/110 cut-off events. For 4089/4089 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 579 event pairs, 14 based on Foata normal form. 0/160 useless extension candidates. Maximal degree in co-relation 948. Up to 52 conditions per place.). - TimeoutResultAtElement [Line: 120]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (29states, 89/318 universal loopers) in iteration 51,while PetriNetUnfolder was constructing finite prefix that currently has 1096 conditions, 111 events (42/110 cut-off events. For 4089/4089 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 579 event pairs, 14 based on Foata normal form. 0/160 useless extension candidates. Maximal degree in co-relation 948. Up to 52 conditions per place.). - TimeoutResultAtElement [Line: 120]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (29states, 89/318 universal loopers) in iteration 51,while PetriNetUnfolder was constructing finite prefix that currently has 1096 conditions, 111 events (42/110 cut-off events. For 4089/4089 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 579 event pairs, 14 based on Foata normal form. 0/160 useless extension candidates. Maximal degree in co-relation 948. Up to 52 conditions per place.). - TimeoutResultAtElement [Line: 102]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (29states, 89/318 universal loopers) in iteration 51,while PetriNetUnfolder was constructing finite prefix that currently has 1096 conditions, 111 events (42/110 cut-off events. For 4089/4089 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 579 event pairs, 14 based on Foata normal form. 0/160 useless extension candidates. Maximal degree in co-relation 948. Up to 52 conditions per place.). - TimeoutResultAtElement [Line: 103]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (29states, 89/318 universal loopers) in iteration 51,while PetriNetUnfolder was constructing finite prefix that currently has 1096 conditions, 111 events (42/110 cut-off events. For 4089/4089 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 579 event pairs, 14 based on Foata normal form. 0/160 useless extension candidates. Maximal degree in co-relation 948. Up to 52 conditions per place.). - TimeoutResultAtElement [Line: 104]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (29states, 89/318 universal loopers) in iteration 51,while PetriNetUnfolder was constructing finite prefix that currently has 1096 conditions, 111 events (42/110 cut-off events. For 4089/4089 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 579 event pairs, 14 based on Foata normal form. 0/160 useless extension candidates. Maximal degree in co-relation 948. Up to 52 conditions per place.). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 209 locations, 26 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 806.7s, OverallIterations: 51, TraceHistogramMax: 4, PathProgramHistogramMax: 22, EmptinessCheckTime: 0.0s, AutomataDifference: 550.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 5.8s, HoareTripleCheckerStatistics: 195 mSolverCounterUnknown, 8188 SdHoareTripleChecker+Valid, 237.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 8188 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 230.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 329 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 1494 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 35878 IncrementalHoareTripleChecker+Invalid, 37896 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1494 mSolverCounterUnsat, 0 mSDtfsCounter, 35878 mSolverCounterSat, 0.4s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2374 GetRequests, 791 SyntacticMatches, 14 SemanticMatches, 1569 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 16363 ImplicationChecksByTransitivity, 403.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22250occurred in iteration=50, InterpolantAutomatonStates: 785, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.6s SsaConstructionTime, 3.3s SatisfiabilityAnalysisTime, 233.4s InterpolantComputationTime, 1840 NumberOfCodeBlocks, 1810 NumberOfCodeBlocksAsserted, 115 NumberOfCheckSat, 2325 ConstructedInterpolants, 109 QuantifiedInterpolants, 77059 SizeOfPredicates, 659 NumberOfNonLiveVariables, 9707 ConjunctsInSsa, 1444 ConjunctsInUnsatCore, 120 InterpolantComputations, 29 PerfectInterpolantSequences, 153/525 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown