/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.pointer.base.address.is.valid.at.dereference ASSERTandASSUME --cacsl2boogietranslator.pointer.to.allocated.memory.at.dereference ASSERTandASSUME --cacsl2boogietranslator.check.array.bounds.for.arrays.that.are.off.heap ASSERTandASSUME --cacsl2boogietranslator.check.if.freed.pointer.was.valid true --cacsl2boogietranslator.adapt.memory.model.on.pointer.casts.if.necessary true -i ../../../trunk/examples/svcomp/weaver/clever.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 13:09:02,847 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 13:09:02,965 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 [2023-08-26 13:09:02,968 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 13:09:02,968 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 13:09:02,992 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 13:09:02,992 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 13:09:02,992 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 13:09:02,993 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 13:09:02,997 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 13:09:02,997 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 13:09:02,997 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 13:09:02,997 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 13:09:02,998 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 13:09:02,998 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 13:09:02,998 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 13:09:02,998 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 13:09:02,998 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 13:09:02,998 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 13:09:02,999 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 13:09:02,999 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 13:09:02,999 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 13:09:03,000 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 13:09:03,000 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 13:09:03,000 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 13:09:03,000 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 13:09:03,000 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 13:09:03,001 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 13:09:03,001 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 13:09:03,001 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 13:09:03,002 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 13:09:03,002 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 13:09:03,002 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 13:09:03,002 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 13:09:03,002 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 13:09:03,002 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 13:09:03,218 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 13:09:03,234 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 13:09:03,236 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 13:09:03,237 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 13:09:03,238 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 13:09:03,239 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/clever.wvr.c [2023-08-26 13:09:04,224 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 13:09:04,427 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 13:09:04,428 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/clever.wvr.c [2023-08-26 13:09:04,432 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0bb9d9793/0605a7329d2245989ca61034f1971528/FLAG95733cb6a [2023-08-26 13:09:04,440 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0bb9d9793/0605a7329d2245989ca61034f1971528 [2023-08-26 13:09:04,442 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 13:09:04,442 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 13:09:04,443 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 13:09:04,443 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 13:09:04,445 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 13:09:04,445 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 01:09:04" (1/1) ... [2023-08-26 13:09:04,446 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5875c9bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:09:04, skipping insertion in model container [2023-08-26 13:09:04,446 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 01:09:04" (1/1) ... [2023-08-26 13:09:04,458 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 13:09:04,577 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 13:09:04,586 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 13:09:04,609 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 13:09:04,621 INFO L206 MainTranslator]: Completed translation [2023-08-26 13:09:04,621 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:09:04 WrapperNode [2023-08-26 13:09:04,621 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 13:09:04,622 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 13:09:04,622 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 13:09:04,622 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 13:09:04,626 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:09:04" (1/1) ... [2023-08-26 13:09:04,636 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:09:04" (1/1) ... [2023-08-26 13:09:04,653 INFO L138 Inliner]: procedures = 19, calls = 22, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 87 [2023-08-26 13:09:04,654 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 13:09:04,655 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 13:09:04,655 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 13:09:04,655 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 13:09:04,660 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:09:04" (1/1) ... [2023-08-26 13:09:04,660 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:09:04" (1/1) ... [2023-08-26 13:09:04,663 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:09:04" (1/1) ... [2023-08-26 13:09:04,663 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:09:04" (1/1) ... [2023-08-26 13:09:04,675 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:09:04" (1/1) ... [2023-08-26 13:09:04,679 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:09:04" (1/1) ... [2023-08-26 13:09:04,680 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:09:04" (1/1) ... [2023-08-26 13:09:04,680 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:09:04" (1/1) ... [2023-08-26 13:09:04,681 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 13:09:04,682 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 13:09:04,682 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 13:09:04,682 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 13:09:04,683 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:09:04" (1/1) ... [2023-08-26 13:09:04,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 13:09:04,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:09:04,720 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) [2023-08-26 13:09:04,750 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 [2023-08-26 13:09:04,763 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 13:09:04,763 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-26 13:09:04,764 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-26 13:09:04,764 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-26 13:09:04,764 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-26 13:09:04,764 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 13:09:04,764 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 13:09:04,765 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 13:09:04,765 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 13:09:04,765 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 13:09:04,765 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-26 13:09:04,765 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 13:09:04,766 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-26 13:09:04,844 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 13:09:04,847 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 13:09:05,049 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 13:09:05,059 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 13:09:05,059 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-26 13:09:05,061 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 01:09:05 BoogieIcfgContainer [2023-08-26 13:09:05,061 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 13:09:05,062 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 13:09:05,062 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 13:09:05,064 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 13:09:05,064 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 01:09:04" (1/3) ... [2023-08-26 13:09:05,065 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69bc3382 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 01:09:05, skipping insertion in model container [2023-08-26 13:09:05,065 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:09:04" (2/3) ... [2023-08-26 13:09:05,065 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69bc3382 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 01:09:05, skipping insertion in model container [2023-08-26 13:09:05,065 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 01:09:05" (3/3) ... [2023-08-26 13:09:05,066 INFO L112 eAbstractionObserver]: Analyzing ICFG clever.wvr.c [2023-08-26 13:09:05,076 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 13:09:05,076 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 9 error locations. [2023-08-26 13:09:05,076 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 13:09:05,133 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-26 13:09:05,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 126 places, 128 transitions, 272 flow [2023-08-26 13:09:05,218 INFO L124 PetriNetUnfolderBase]: 9/126 cut-off events. [2023-08-26 13:09:05,219 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 13:09:05,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135 conditions, 126 events. 9/126 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 110 event pairs, 0 based on Foata normal form. 0/108 useless extension candidates. Maximal degree in co-relation 89. Up to 2 conditions per place. [2023-08-26 13:09:05,223 INFO L82 GeneralOperation]: Start removeDead. Operand has 126 places, 128 transitions, 272 flow [2023-08-26 13:09:05,226 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 115 places, 117 transitions, 246 flow [2023-08-26 13:09:05,228 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 13:09:05,237 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 115 places, 117 transitions, 246 flow [2023-08-26 13:09:05,239 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 115 places, 117 transitions, 246 flow [2023-08-26 13:09:05,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 115 places, 117 transitions, 246 flow [2023-08-26 13:09:05,270 INFO L124 PetriNetUnfolderBase]: 9/117 cut-off events. [2023-08-26 13:09:05,270 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 13:09:05,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126 conditions, 117 events. 9/117 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 108 event pairs, 0 based on Foata normal form. 0/100 useless extension candidates. Maximal degree in co-relation 89. Up to 2 conditions per place. [2023-08-26 13:09:05,272 INFO L119 LiptonReduction]: Number of co-enabled transitions 972 [2023-08-26 13:09:08,249 INFO L134 LiptonReduction]: Checked pairs total: 991 [2023-08-26 13:09:08,249 INFO L136 LiptonReduction]: Total number of compositions: 120 [2023-08-26 13:09:08,263 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 13:09:08,269 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;@4fbc2991, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 13:09:08,269 INFO L358 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2023-08-26 13:09:08,272 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 13:09:08,272 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2023-08-26 13:09:08,272 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 13:09:08,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:09:08,273 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-26 13:09:08,273 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:09:08,276 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:09:08,276 INFO L85 PathProgramCache]: Analyzing trace with hash 473, now seen corresponding path program 1 times [2023-08-26 13:09:08,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:09:08,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571400808] [2023-08-26 13:09:08,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:09:08,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:09:08,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:09:08,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:09:08,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:09:08,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571400808] [2023-08-26 13:09:08,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571400808] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:09:08,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:09:08,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-26 13:09:08,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905345140] [2023-08-26 13:09:08,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:09:08,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 13:09:08,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:09:08,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 13:09:08,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 13:09:08,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 248 [2023-08-26 13:09:08,399 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 23 transitions, 58 flow. Second operand has 2 states, 2 states have (on average 117.5) internal successors, (235), 2 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:09:08,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:09:08,399 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 248 [2023-08-26 13:09:08,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:09:08,435 INFO L124 PetriNetUnfolderBase]: 75/122 cut-off events. [2023-08-26 13:09:08,435 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-26 13:09:08,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 259 conditions, 122 events. 75/122 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 258 event pairs, 35 based on Foata normal form. 0/60 useless extension candidates. Maximal degree in co-relation 210. Up to 123 conditions per place. [2023-08-26 13:09:08,436 INFO L140 encePairwiseOnDemand]: 246/248 looper letters, 21 selfloop transitions, 0 changer transitions 0/21 dead transitions. [2023-08-26 13:09:08,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 21 transitions, 96 flow [2023-08-26 13:09:08,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 13:09:08,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 13:09:08,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 257 transitions. [2023-08-26 13:09:08,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5181451612903226 [2023-08-26 13:09:08,445 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 257 transitions. [2023-08-26 13:09:08,445 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 257 transitions. [2023-08-26 13:09:08,446 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:09:08,448 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 257 transitions. [2023-08-26 13:09:08,450 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 128.5) internal successors, (257), 2 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:09:08,454 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 248.0) internal successors, (744), 3 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:09:08,454 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 248.0) internal successors, (744), 3 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:09:08,455 INFO L175 Difference]: Start difference. First operand has 27 places, 23 transitions, 58 flow. Second operand 2 states and 257 transitions. [2023-08-26 13:09:08,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 21 transitions, 96 flow [2023-08-26 13:09:08,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 21 transitions, 88 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-26 13:09:08,458 INFO L231 Difference]: Finished difference. Result has 22 places, 21 transitions, 46 flow [2023-08-26 13:09:08,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=46, PETRI_PLACES=22, PETRI_TRANSITIONS=21} [2023-08-26 13:09:08,461 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, -5 predicate places. [2023-08-26 13:09:08,461 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 21 transitions, 46 flow [2023-08-26 13:09:08,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 117.5) internal successors, (235), 2 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:09:08,462 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:09:08,462 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 13:09:08,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 13:09:08,462 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:09:08,462 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:09:08,463 INFO L85 PathProgramCache]: Analyzing trace with hash 465912, now seen corresponding path program 1 times [2023-08-26 13:09:08,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:09:08,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229832946] [2023-08-26 13:09:08,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:09:08,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:09:08,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:09:08,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:09:08,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:09:08,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229832946] [2023-08-26 13:09:08,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229832946] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:09:08,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:09:08,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 13:09:08,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523748913] [2023-08-26 13:09:08,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:09:08,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 13:09:08,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:09:08,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 13:09:08,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 13:09:08,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 248 [2023-08-26 13:09:08,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 21 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 99.0) internal successors, (297), 3 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:09:08,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:09:08,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 248 [2023-08-26 13:09:08,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:09:08,597 INFO L124 PetriNetUnfolderBase]: 69/111 cut-off events. [2023-08-26 13:09:08,597 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 13:09:08,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 229 conditions, 111 events. 69/111 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 225 event pairs, 32 based on Foata normal form. 0/57 useless extension candidates. Maximal degree in co-relation 226. Up to 111 conditions per place. [2023-08-26 13:09:08,599 INFO L140 encePairwiseOnDemand]: 245/248 looper letters, 18 selfloop transitions, 1 changer transitions 0/19 dead transitions. [2023-08-26 13:09:08,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 19 transitions, 80 flow [2023-08-26 13:09:08,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 13:09:08,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 13:09:08,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 315 transitions. [2023-08-26 13:09:08,604 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42338709677419356 [2023-08-26 13:09:08,605 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 315 transitions. [2023-08-26 13:09:08,605 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 315 transitions. [2023-08-26 13:09:08,605 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:09:08,605 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 315 transitions. [2023-08-26 13:09:08,607 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 105.0) internal successors, (315), 3 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:09:08,612 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 248.0) internal successors, (992), 4 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:09:08,612 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 248.0) internal successors, (992), 4 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:09:08,612 INFO L175 Difference]: Start difference. First operand has 22 places, 21 transitions, 46 flow. Second operand 3 states and 315 transitions. [2023-08-26 13:09:08,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 19 transitions, 80 flow [2023-08-26 13:09:08,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 19 transitions, 80 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 13:09:08,614 INFO L231 Difference]: Finished difference. Result has 22 places, 19 transitions, 44 flow [2023-08-26 13:09:08,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=44, PETRI_PLACES=22, PETRI_TRANSITIONS=19} [2023-08-26 13:09:08,614 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, -5 predicate places. [2023-08-26 13:09:08,614 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 19 transitions, 44 flow [2023-08-26 13:09:08,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 99.0) internal successors, (297), 3 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:09:08,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:09:08,616 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 13:09:08,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 13:09:08,618 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:09:08,618 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:09:08,618 INFO L85 PathProgramCache]: Analyzing trace with hash 465910, now seen corresponding path program 1 times [2023-08-26 13:09:08,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:09:08,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856466453] [2023-08-26 13:09:08,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:09:08,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:09:08,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:09:08,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:09:08,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:09:08,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856466453] [2023-08-26 13:09:08,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856466453] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:09:08,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:09:08,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 13:09:08,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556913442] [2023-08-26 13:09:08,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:09:08,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 13:09:08,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:09:08,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 13:09:08,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 13:09:08,785 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 248 [2023-08-26 13:09:08,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 19 transitions, 44 flow. Second operand has 3 states, 3 states have (on average 101.0) internal successors, (303), 3 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:09:08,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:09:08,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 248 [2023-08-26 13:09:08,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:09:08,816 INFO L124 PetriNetUnfolderBase]: 63/100 cut-off events. [2023-08-26 13:09:08,817 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 13:09:08,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 209 conditions, 100 events. 63/100 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 197 event pairs, 29 based on Foata normal form. 0/54 useless extension candidates. Maximal degree in co-relation 205. Up to 100 conditions per place. [2023-08-26 13:09:08,817 INFO L140 encePairwiseOnDemand]: 245/248 looper letters, 16 selfloop transitions, 1 changer transitions 0/17 dead transitions. [2023-08-26 13:09:08,817 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 17 transitions, 74 flow [2023-08-26 13:09:08,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 13:09:08,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 13:09:08,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 319 transitions. [2023-08-26 13:09:08,819 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42876344086021506 [2023-08-26 13:09:08,819 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 319 transitions. [2023-08-26 13:09:08,819 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 319 transitions. [2023-08-26 13:09:08,819 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:09:08,819 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 319 transitions. [2023-08-26 13:09:08,820 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 106.33333333333333) internal successors, (319), 3 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:09:08,822 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 248.0) internal successors, (992), 4 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:09:08,822 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 248.0) internal successors, (992), 4 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:09:08,822 INFO L175 Difference]: Start difference. First operand has 22 places, 19 transitions, 44 flow. Second operand 3 states and 319 transitions. [2023-08-26 13:09:08,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 17 transitions, 74 flow [2023-08-26 13:09:08,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 17 transitions, 73 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 13:09:08,823 INFO L231 Difference]: Finished difference. Result has 21 places, 17 transitions, 41 flow [2023-08-26 13:09:08,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=39, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=41, PETRI_PLACES=21, PETRI_TRANSITIONS=17} [2023-08-26 13:09:08,824 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, -6 predicate places. [2023-08-26 13:09:08,824 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 17 transitions, 41 flow [2023-08-26 13:09:08,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 101.0) internal successors, (303), 3 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:09:08,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:09:08,824 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 13:09:08,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 13:09:08,827 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:09:08,827 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:09:08,827 INFO L85 PathProgramCache]: Analyzing trace with hash 447750795, now seen corresponding path program 1 times [2023-08-26 13:09:08,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:09:08,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274998586] [2023-08-26 13:09:08,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:09:08,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:09:08,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:09:08,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:09:08,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:09:08,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274998586] [2023-08-26 13:09:08,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274998586] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:09:08,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:09:08,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 13:09:08,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760668537] [2023-08-26 13:09:08,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:09:08,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 13:09:08,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:09:08,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 13:09:08,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 13:09:08,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 248 [2023-08-26 13:09:08,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 41 flow. Second operand has 4 states, 4 states have (on average 97.25) internal successors, (389), 4 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:09:08,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:09:08,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 248 [2023-08-26 13:09:08,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:09:08,971 INFO L124 PetriNetUnfolderBase]: 49/80 cut-off events. [2023-08-26 13:09:08,971 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 13:09:08,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 170 conditions, 80 events. 49/80 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 138 event pairs, 22 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 166. Up to 80 conditions per place. [2023-08-26 13:09:08,972 INFO L140 encePairwiseOnDemand]: 246/248 looper letters, 15 selfloop transitions, 1 changer transitions 0/16 dead transitions. [2023-08-26 13:09:08,972 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 16 transitions, 71 flow [2023-08-26 13:09:08,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 13:09:08,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 13:09:08,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 305 transitions. [2023-08-26 13:09:08,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4099462365591398 [2023-08-26 13:09:08,973 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 305 transitions. [2023-08-26 13:09:08,973 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 305 transitions. [2023-08-26 13:09:08,973 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:09:08,973 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 305 transitions. [2023-08-26 13:09:08,974 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 101.66666666666667) internal successors, (305), 3 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:09:08,975 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 248.0) internal successors, (992), 4 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:09:08,975 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 248.0) internal successors, (992), 4 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:09:08,976 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 41 flow. Second operand 3 states and 305 transitions. [2023-08-26 13:09:08,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 16 transitions, 71 flow [2023-08-26 13:09:08,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 16 transitions, 70 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 13:09:08,976 INFO L231 Difference]: Finished difference. Result has 21 places, 16 transitions, 40 flow [2023-08-26 13:09:08,976 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=40, PETRI_PLACES=21, PETRI_TRANSITIONS=16} [2023-08-26 13:09:08,977 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, -6 predicate places. [2023-08-26 13:09:08,977 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 16 transitions, 40 flow [2023-08-26 13:09:08,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 97.25) internal successors, (389), 4 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:09:08,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:09:08,977 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 13:09:08,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 13:09:08,977 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:09:08,978 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:09:08,978 INFO L85 PathProgramCache]: Analyzing trace with hash 447750794, now seen corresponding path program 1 times [2023-08-26 13:09:08,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:09:08,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815318823] [2023-08-26 13:09:08,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:09:08,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:09:08,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:09:09,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:09:09,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:09:09,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815318823] [2023-08-26 13:09:09,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815318823] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:09:09,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:09:09,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 13:09:09,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656547330] [2023-08-26 13:09:09,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:09:09,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 13:09:09,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:09:09,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 13:09:09,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 13:09:09,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 248 [2023-08-26 13:09:09,017 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 16 transitions, 40 flow. Second operand has 4 states, 4 states have (on average 96.25) internal successors, (385), 4 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:09:09,017 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:09:09,017 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 248 [2023-08-26 13:09:09,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:09:09,033 INFO L124 PetriNetUnfolderBase]: 35/60 cut-off events. [2023-08-26 13:09:09,033 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 13:09:09,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131 conditions, 60 events. 35/60 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 85 event pairs, 15 based on Foata normal form. 0/40 useless extension candidates. Maximal degree in co-relation 127. Up to 60 conditions per place. [2023-08-26 13:09:09,034 INFO L140 encePairwiseOnDemand]: 246/248 looper letters, 14 selfloop transitions, 1 changer transitions 0/15 dead transitions. [2023-08-26 13:09:09,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 15 transitions, 68 flow [2023-08-26 13:09:09,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 13:09:09,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 13:09:09,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 301 transitions. [2023-08-26 13:09:09,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40456989247311825 [2023-08-26 13:09:09,035 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 301 transitions. [2023-08-26 13:09:09,035 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 301 transitions. [2023-08-26 13:09:09,035 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:09:09,035 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 301 transitions. [2023-08-26 13:09:09,036 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 100.33333333333333) internal successors, (301), 3 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:09:09,037 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 248.0) internal successors, (992), 4 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:09:09,037 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 248.0) internal successors, (992), 4 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:09:09,037 INFO L175 Difference]: Start difference. First operand has 21 places, 16 transitions, 40 flow. Second operand 3 states and 301 transitions. [2023-08-26 13:09:09,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 15 transitions, 68 flow [2023-08-26 13:09:09,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 15 transitions, 67 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 13:09:09,038 INFO L231 Difference]: Finished difference. Result has 21 places, 15 transitions, 39 flow [2023-08-26 13:09:09,038 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=37, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=39, PETRI_PLACES=21, PETRI_TRANSITIONS=15} [2023-08-26 13:09:09,038 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, -6 predicate places. [2023-08-26 13:09:09,038 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 15 transitions, 39 flow [2023-08-26 13:09:09,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 96.25) internal successors, (385), 4 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:09:09,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:09:09,039 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:09:09,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 13:09:09,039 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:09:09,039 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:09:09,039 INFO L85 PathProgramCache]: Analyzing trace with hash -1812774620, now seen corresponding path program 1 times [2023-08-26 13:09:09,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:09:09,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479793490] [2023-08-26 13:09:09,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:09:09,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:09:09,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:09:09,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:09:09,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:09:09,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479793490] [2023-08-26 13:09:09,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479793490] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:09:09,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:09:09,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 13:09:09,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732325327] [2023-08-26 13:09:09,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:09:09,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 13:09:09,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:09:09,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 13:09:09,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 13:09:09,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 248 [2023-08-26 13:09:09,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 15 transitions, 39 flow. Second operand has 4 states, 4 states have (on average 103.75) internal successors, (415), 4 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:09:09,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:09:09,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 248 [2023-08-26 13:09:09,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:09:09,193 INFO L124 PetriNetUnfolderBase]: 69/117 cut-off events. [2023-08-26 13:09:09,193 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 13:09:09,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 249 conditions, 117 events. 69/117 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 282 event pairs, 15 based on Foata normal form. 1/78 useless extension candidates. Maximal degree in co-relation 245. Up to 73 conditions per place. [2023-08-26 13:09:09,194 INFO L140 encePairwiseOnDemand]: 244/248 looper letters, 23 selfloop transitions, 3 changer transitions 1/27 dead transitions. [2023-08-26 13:09:09,194 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 27 transitions, 120 flow [2023-08-26 13:09:09,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 13:09:09,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 13:09:09,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 331 transitions. [2023-08-26 13:09:09,195 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44489247311827956 [2023-08-26 13:09:09,195 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 331 transitions. [2023-08-26 13:09:09,195 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 331 transitions. [2023-08-26 13:09:09,195 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:09:09,195 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 331 transitions. [2023-08-26 13:09:09,196 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 110.33333333333333) internal successors, (331), 3 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:09:09,197 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 248.0) internal successors, (992), 4 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:09:09,197 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 248.0) internal successors, (992), 4 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:09:09,197 INFO L175 Difference]: Start difference. First operand has 21 places, 15 transitions, 39 flow. Second operand 3 states and 331 transitions. [2023-08-26 13:09:09,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 27 transitions, 120 flow [2023-08-26 13:09:09,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 27 transitions, 119 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 13:09:09,198 INFO L231 Difference]: Finished difference. Result has 23 places, 17 transitions, 57 flow [2023-08-26 13:09:09,198 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=57, PETRI_PLACES=23, PETRI_TRANSITIONS=17} [2023-08-26 13:09:09,198 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, -4 predicate places. [2023-08-26 13:09:09,198 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 17 transitions, 57 flow [2023-08-26 13:09:09,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 103.75) internal successors, (415), 4 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:09:09,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:09:09,199 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:09:09,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 13:09:09,199 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:09:09,199 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:09:09,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1547196692, now seen corresponding path program 1 times [2023-08-26 13:09:09,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:09:09,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350787469] [2023-08-26 13:09:09,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:09:09,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:09:09,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:09:09,230 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:09:09,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:09:09,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350787469] [2023-08-26 13:09:09,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350787469] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:09:09,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:09:09,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 13:09:09,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142003755] [2023-08-26 13:09:09,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:09:09,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 13:09:09,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:09:09,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 13:09:09,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 13:09:09,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 248 [2023-08-26 13:09:09,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 17 transitions, 57 flow. Second operand has 4 states, 4 states have (on average 105.0) internal successors, (420), 4 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:09:09,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:09:09,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 248 [2023-08-26 13:09:09,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:09:09,282 INFO L124 PetriNetUnfolderBase]: 125/216 cut-off events. [2023-08-26 13:09:09,282 INFO L125 PetriNetUnfolderBase]: For 45/45 co-relation queries the response was YES. [2023-08-26 13:09:09,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 527 conditions, 216 events. 125/216 cut-off events. For 45/45 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 677 event pairs, 11 based on Foata normal form. 8/202 useless extension candidates. Maximal degree in co-relation 522. Up to 79 conditions per place. [2023-08-26 13:09:09,283 INFO L140 encePairwiseOnDemand]: 242/248 looper letters, 40 selfloop transitions, 7 changer transitions 2/49 dead transitions. [2023-08-26 13:09:09,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 49 transitions, 246 flow [2023-08-26 13:09:09,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 13:09:09,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 13:09:09,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 554 transitions. [2023-08-26 13:09:09,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4467741935483871 [2023-08-26 13:09:09,285 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 554 transitions. [2023-08-26 13:09:09,285 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 554 transitions. [2023-08-26 13:09:09,285 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:09:09,285 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 554 transitions. [2023-08-26 13:09:09,286 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 110.8) internal successors, (554), 5 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:09:09,287 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 248.0) internal successors, (1488), 6 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:09:09,287 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 248.0) internal successors, (1488), 6 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:09:09,287 INFO L175 Difference]: Start difference. First operand has 23 places, 17 transitions, 57 flow. Second operand 5 states and 554 transitions. [2023-08-26 13:09:09,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 49 transitions, 246 flow [2023-08-26 13:09:09,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 49 transitions, 239 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 13:09:09,289 INFO L231 Difference]: Finished difference. Result has 29 places, 23 transitions, 105 flow [2023-08-26 13:09:09,289 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=105, PETRI_PLACES=29, PETRI_TRANSITIONS=23} [2023-08-26 13:09:09,289 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 2 predicate places. [2023-08-26 13:09:09,289 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 23 transitions, 105 flow [2023-08-26 13:09:09,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 105.0) internal successors, (420), 4 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:09:09,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:09:09,289 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:09:09,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 13:09:09,290 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:09:09,290 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:09:09,290 INFO L85 PathProgramCache]: Analyzing trace with hash -296484170, now seen corresponding path program 2 times [2023-08-26 13:09:09,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:09:09,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348116062] [2023-08-26 13:09:09,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:09:09,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:09:09,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:09:09,325 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:09:09,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:09:09,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348116062] [2023-08-26 13:09:09,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348116062] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:09:09,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:09:09,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 13:09:09,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015429005] [2023-08-26 13:09:09,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:09:09,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 13:09:09,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:09:09,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 13:09:09,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 13:09:09,327 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 248 [2023-08-26 13:09:09,327 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 23 transitions, 105 flow. Second operand has 4 states, 4 states have (on average 105.0) internal successors, (420), 4 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:09:09,327 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:09:09,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 248 [2023-08-26 13:09:09,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:09:09,379 INFO L124 PetriNetUnfolderBase]: 125/210 cut-off events. [2023-08-26 13:09:09,379 INFO L125 PetriNetUnfolderBase]: For 170/170 co-relation queries the response was YES. [2023-08-26 13:09:09,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 662 conditions, 210 events. 125/210 cut-off events. For 170/170 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 632 event pairs, 17 based on Foata normal form. 4/214 useless extension candidates. Maximal degree in co-relation 654. Up to 92 conditions per place. [2023-08-26 13:09:09,381 INFO L140 encePairwiseOnDemand]: 242/248 looper letters, 32 selfloop transitions, 11 changer transitions 6/49 dead transitions. [2023-08-26 13:09:09,381 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 49 transitions, 305 flow [2023-08-26 13:09:09,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 13:09:09,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 13:09:09,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 549 transitions. [2023-08-26 13:09:09,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.442741935483871 [2023-08-26 13:09:09,382 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 549 transitions. [2023-08-26 13:09:09,383 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 549 transitions. [2023-08-26 13:09:09,383 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:09:09,383 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 549 transitions. [2023-08-26 13:09:09,384 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 109.8) internal successors, (549), 5 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:09:09,385 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 248.0) internal successors, (1488), 6 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:09:09,385 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 248.0) internal successors, (1488), 6 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:09:09,385 INFO L175 Difference]: Start difference. First operand has 29 places, 23 transitions, 105 flow. Second operand 5 states and 549 transitions. [2023-08-26 13:09:09,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 49 transitions, 305 flow [2023-08-26 13:09:09,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 49 transitions, 305 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 13:09:09,390 INFO L231 Difference]: Finished difference. Result has 36 places, 27 transitions, 170 flow [2023-08-26 13:09:09,390 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=170, PETRI_PLACES=36, PETRI_TRANSITIONS=27} [2023-08-26 13:09:09,392 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 9 predicate places. [2023-08-26 13:09:09,392 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 27 transitions, 170 flow [2023-08-26 13:09:09,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 105.0) internal successors, (420), 4 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:09:09,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:09:09,392 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:09:09,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-26 13:09:09,393 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:09:09,396 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:09:09,396 INFO L85 PathProgramCache]: Analyzing trace with hash -329297151, now seen corresponding path program 1 times [2023-08-26 13:09:09,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:09:09,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250013083] [2023-08-26 13:09:09,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:09:09,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:09:09,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:09:09,465 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 13:09:09,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:09:09,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250013083] [2023-08-26 13:09:09,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250013083] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:09:09,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457169638] [2023-08-26 13:09:09,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:09:09,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:09:09,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:09:09,468 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) [2023-08-26 13:09:09,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-26 13:09:09,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:09:09,568 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-26 13:09:09,571 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:09:09,652 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 13:09:09,652 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:09:09,677 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 13:09:09,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457169638] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:09:09,677 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:09:09,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-08-26 13:09:09,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23629143] [2023-08-26 13:09:09,677 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:09:09,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 13:09:09,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:09:09,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 13:09:09,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-26 13:09:09,679 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 248 [2023-08-26 13:09:09,679 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 27 transitions, 170 flow. Second operand has 6 states, 6 states have (on average 106.0) internal successors, (636), 6 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:09:09,679 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:09:09,679 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 248 [2023-08-26 13:09:09,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:09:09,739 INFO L124 PetriNetUnfolderBase]: 131/230 cut-off events. [2023-08-26 13:09:09,739 INFO L125 PetriNetUnfolderBase]: For 345/345 co-relation queries the response was YES. [2023-08-26 13:09:09,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 873 conditions, 230 events. 131/230 cut-off events. For 345/345 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 733 event pairs, 2 based on Foata normal form. 20/250 useless extension candidates. Maximal degree in co-relation 861. Up to 96 conditions per place. [2023-08-26 13:09:09,740 INFO L140 encePairwiseOnDemand]: 243/248 looper letters, 43 selfloop transitions, 9 changer transitions 4/56 dead transitions. [2023-08-26 13:09:09,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 56 transitions, 419 flow [2023-08-26 13:09:09,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 13:09:09,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 13:09:09,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 553 transitions. [2023-08-26 13:09:09,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4459677419354839 [2023-08-26 13:09:09,741 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 553 transitions. [2023-08-26 13:09:09,742 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 553 transitions. [2023-08-26 13:09:09,742 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:09:09,742 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 553 transitions. [2023-08-26 13:09:09,743 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 110.6) internal successors, (553), 5 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:09:09,744 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 248.0) internal successors, (1488), 6 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:09:09,744 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 248.0) internal successors, (1488), 6 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:09:09,744 INFO L175 Difference]: Start difference. First operand has 36 places, 27 transitions, 170 flow. Second operand 5 states and 553 transitions. [2023-08-26 13:09:09,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 56 transitions, 419 flow [2023-08-26 13:09:09,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 56 transitions, 413 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-08-26 13:09:09,746 INFO L231 Difference]: Finished difference. Result has 42 places, 32 transitions, 242 flow [2023-08-26 13:09:09,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=242, PETRI_PLACES=42, PETRI_TRANSITIONS=32} [2023-08-26 13:09:09,747 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 15 predicate places. [2023-08-26 13:09:09,747 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 32 transitions, 242 flow [2023-08-26 13:09:09,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 106.0) internal successors, (636), 6 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:09:09,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:09:09,747 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:09:09,754 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-26 13:09:09,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:09:09,952 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:09:09,952 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:09:09,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1186717249, now seen corresponding path program 2 times [2023-08-26 13:09:09,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:09:09,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500501237] [2023-08-26 13:09:09,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:09:09,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:09:09,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:09:09,999 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 13:09:09,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:09:09,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500501237] [2023-08-26 13:09:09,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500501237] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:09:09,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:09:09,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 13:09:09,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420325302] [2023-08-26 13:09:09,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:09:10,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 13:09:10,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:09:10,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 13:09:10,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 13:09:10,001 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 248 [2023-08-26 13:09:10,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 242 flow. Second operand has 4 states, 4 states have (on average 105.5) internal successors, (422), 4 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:09:10,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:09:10,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 248 [2023-08-26 13:09:10,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:09:10,047 INFO L124 PetriNetUnfolderBase]: 119/205 cut-off events. [2023-08-26 13:09:10,047 INFO L125 PetriNetUnfolderBase]: For 493/493 co-relation queries the response was YES. [2023-08-26 13:09:10,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 863 conditions, 205 events. 119/205 cut-off events. For 493/493 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 578 event pairs, 26 based on Foata normal form. 2/207 useless extension candidates. Maximal degree in co-relation 848. Up to 68 conditions per place. [2023-08-26 13:09:10,049 INFO L140 encePairwiseOnDemand]: 243/248 looper letters, 41 selfloop transitions, 9 changer transitions 2/52 dead transitions. [2023-08-26 13:09:10,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 52 transitions, 448 flow [2023-08-26 13:09:10,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 13:09:10,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 13:09:10,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 546 transitions. [2023-08-26 13:09:10,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4403225806451613 [2023-08-26 13:09:10,050 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 546 transitions. [2023-08-26 13:09:10,050 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 546 transitions. [2023-08-26 13:09:10,050 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:09:10,050 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 546 transitions. [2023-08-26 13:09:10,051 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 109.2) internal successors, (546), 5 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:09:10,052 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 248.0) internal successors, (1488), 6 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:09:10,053 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 248.0) internal successors, (1488), 6 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:09:10,053 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 242 flow. Second operand 5 states and 546 transitions. [2023-08-26 13:09:10,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 52 transitions, 448 flow [2023-08-26 13:09:10,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 52 transitions, 430 flow, removed 6 selfloop flow, removed 2 redundant places. [2023-08-26 13:09:10,055 INFO L231 Difference]: Finished difference. Result has 47 places, 35 transitions, 284 flow [2023-08-26 13:09:10,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=213, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=284, PETRI_PLACES=47, PETRI_TRANSITIONS=35} [2023-08-26 13:09:10,056 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 20 predicate places. [2023-08-26 13:09:10,056 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 35 transitions, 284 flow [2023-08-26 13:09:10,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 105.5) internal successors, (422), 4 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:09:10,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:09:10,056 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:09:10,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-26 13:09:10,056 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:09:10,056 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:09:10,056 INFO L85 PathProgramCache]: Analyzing trace with hash 298623701, now seen corresponding path program 1 times [2023-08-26 13:09:10,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:09:10,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771333301] [2023-08-26 13:09:10,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:09:10,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:09:10,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:09:10,288 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:09:10,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:09:10,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771333301] [2023-08-26 13:09:10,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771333301] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:09:10,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936108486] [2023-08-26 13:09:10,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:09:10,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:09:10,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:09:10,290 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) [2023-08-26 13:09:10,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-26 13:09:10,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:09:10,355 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-26 13:09:10,356 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:09:10,482 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:09:10,482 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:09:10,593 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:09:10,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936108486] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:09:10,593 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:09:10,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 12 [2023-08-26 13:09:10,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664192053] [2023-08-26 13:09:10,594 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:09:10,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-26 13:09:10,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:09:10,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-26 13:09:10,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2023-08-26 13:09:10,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 248 [2023-08-26 13:09:10,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 35 transitions, 284 flow. Second operand has 14 states, 14 states have (on average 87.64285714285714) internal successors, (1227), 14 states have internal predecessors, (1227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:09:10,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:09:10,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 248 [2023-08-26 13:09:10,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:09:10,847 INFO L124 PetriNetUnfolderBase]: 252/433 cut-off events. [2023-08-26 13:09:10,847 INFO L125 PetriNetUnfolderBase]: For 1201/1201 co-relation queries the response was YES. [2023-08-26 13:09:10,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1945 conditions, 433 events. 252/433 cut-off events. For 1201/1201 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1625 event pairs, 18 based on Foata normal form. 14/447 useless extension candidates. Maximal degree in co-relation 1927. Up to 180 conditions per place. [2023-08-26 13:09:10,850 INFO L140 encePairwiseOnDemand]: 242/248 looper letters, 67 selfloop transitions, 21 changer transitions 21/109 dead transitions. [2023-08-26 13:09:10,850 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 109 transitions, 999 flow [2023-08-26 13:09:10,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-26 13:09:10,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-26 13:09:10,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 839 transitions. [2023-08-26 13:09:10,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37589605734767023 [2023-08-26 13:09:10,852 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 839 transitions. [2023-08-26 13:09:10,852 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 839 transitions. [2023-08-26 13:09:10,852 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:09:10,852 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 839 transitions. [2023-08-26 13:09:10,854 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 93.22222222222223) internal successors, (839), 9 states have internal predecessors, (839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:09:10,856 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 248.0) internal successors, (2480), 10 states have internal predecessors, (2480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:09:10,856 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 248.0) internal successors, (2480), 10 states have internal predecessors, (2480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:09:10,856 INFO L175 Difference]: Start difference. First operand has 47 places, 35 transitions, 284 flow. Second operand 9 states and 839 transitions. [2023-08-26 13:09:10,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 109 transitions, 999 flow [2023-08-26 13:09:10,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 109 transitions, 968 flow, removed 12 selfloop flow, removed 1 redundant places. [2023-08-26 13:09:10,860 INFO L231 Difference]: Finished difference. Result has 60 places, 49 transitions, 483 flow [2023-08-26 13:09:10,860 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=483, PETRI_PLACES=60, PETRI_TRANSITIONS=49} [2023-08-26 13:09:10,861 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 33 predicate places. [2023-08-26 13:09:10,861 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 49 transitions, 483 flow [2023-08-26 13:09:10,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 87.64285714285714) internal successors, (1227), 14 states have internal predecessors, (1227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:09:10,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:09:10,861 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:09:10,868 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-26 13:09:11,066 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,SelfDestructingSolverStorable10 [2023-08-26 13:09:11,066 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:09:11,066 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:09:11,066 INFO L85 PathProgramCache]: Analyzing trace with hash 1062984209, now seen corresponding path program 2 times [2023-08-26 13:09:11,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:09:11,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191118275] [2023-08-26 13:09:11,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:09:11,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:09:11,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:09:11,421 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:09:11,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:09:11,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191118275] [2023-08-26 13:09:11,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191118275] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:09:11,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861768229] [2023-08-26 13:09:11,422 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 13:09:11,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:09:11,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:09:11,423 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) [2023-08-26 13:09:11,425 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-26 13:09:11,496 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 13:09:11,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:09:11,497 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-26 13:09:11,498 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:09:11,638 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:09:11,638 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:09:13,761 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:09:13,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861768229] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:09:13,762 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:09:13,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 12 [2023-08-26 13:09:13,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632687506] [2023-08-26 13:09:13,762 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:09:13,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-26 13:09:13,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:09:13,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-26 13:09:13,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=133, Unknown=1, NotChecked=0, Total=182 [2023-08-26 13:09:13,764 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 248 [2023-08-26 13:09:13,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 49 transitions, 483 flow. Second operand has 14 states, 14 states have (on average 87.64285714285714) internal successors, (1227), 14 states have internal predecessors, (1227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:09:13,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:09:13,765 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 248 [2023-08-26 13:09:13,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:09:14,624 INFO L124 PetriNetUnfolderBase]: 728/1252 cut-off events. [2023-08-26 13:09:14,624 INFO L125 PetriNetUnfolderBase]: For 4283/4283 co-relation queries the response was YES. [2023-08-26 13:09:14,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5862 conditions, 1252 events. 728/1252 cut-off events. For 4283/4283 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 6154 event pairs, 56 based on Foata normal form. 8/1260 useless extension candidates. Maximal degree in co-relation 5838. Up to 369 conditions per place. [2023-08-26 13:09:14,633 INFO L140 encePairwiseOnDemand]: 242/248 looper letters, 161 selfloop transitions, 95 changer transitions 12/268 dead transitions. [2023-08-26 13:09:14,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 268 transitions, 2613 flow [2023-08-26 13:09:14,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-26 13:09:14,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-26 13:09:14,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1784 transitions. [2023-08-26 13:09:14,637 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37860780984719866 [2023-08-26 13:09:14,637 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1784 transitions. [2023-08-26 13:09:14,637 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1784 transitions. [2023-08-26 13:09:14,638 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:09:14,638 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1784 transitions. [2023-08-26 13:09:14,640 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 93.89473684210526) internal successors, (1784), 19 states have internal predecessors, (1784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:09:14,644 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 248.0) internal successors, (4960), 20 states have internal predecessors, (4960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:09:14,645 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 248.0) internal successors, (4960), 20 states have internal predecessors, (4960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:09:14,645 INFO L175 Difference]: Start difference. First operand has 60 places, 49 transitions, 483 flow. Second operand 19 states and 1784 transitions. [2023-08-26 13:09:14,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 268 transitions, 2613 flow [2023-08-26 13:09:14,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 268 transitions, 2478 flow, removed 64 selfloop flow, removed 3 redundant places. [2023-08-26 13:09:14,656 INFO L231 Difference]: Finished difference. Result has 86 places, 143 transitions, 1639 flow [2023-08-26 13:09:14,656 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=432, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1639, PETRI_PLACES=86, PETRI_TRANSITIONS=143} [2023-08-26 13:09:14,657 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 59 predicate places. [2023-08-26 13:09:14,657 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 143 transitions, 1639 flow [2023-08-26 13:09:14,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 87.64285714285714) internal successors, (1227), 14 states have internal predecessors, (1227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:09:14,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:09:14,657 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:09:14,667 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-26 13:09:14,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:09:14,862 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:09:14,863 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:09:14,863 INFO L85 PathProgramCache]: Analyzing trace with hash -1112391621, now seen corresponding path program 3 times [2023-08-26 13:09:14,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:09:14,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398874338] [2023-08-26 13:09:14,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:09:14,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:09:14,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:09:15,182 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:09:15,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:09:15,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398874338] [2023-08-26 13:09:15,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398874338] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:09:15,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683383444] [2023-08-26 13:09:15,183 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-26 13:09:15,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:09:15,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:09:15,198 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) [2023-08-26 13:09:15,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-26 13:09:15,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-26 13:09:15,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:09:15,287 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-26 13:09:15,288 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:09:15,427 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:09:15,428 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:09:15,564 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:09:15,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683383444] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:09:15,564 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:09:15,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 12 [2023-08-26 13:09:15,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689091090] [2023-08-26 13:09:15,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:09:15,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-26 13:09:15,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:09:15,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-26 13:09:15,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2023-08-26 13:09:15,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 248 [2023-08-26 13:09:15,567 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 143 transitions, 1639 flow. Second operand has 14 states, 14 states have (on average 87.64285714285714) internal successors, (1227), 14 states have internal predecessors, (1227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:09:15,567 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:09:15,567 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 248 [2023-08-26 13:09:15,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:09:17,724 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-26 13:09:18,584 INFO L124 PetriNetUnfolderBase]: 2265/3902 cut-off events. [2023-08-26 13:09:18,584 INFO L125 PetriNetUnfolderBase]: For 19954/19954 co-relation queries the response was YES. [2023-08-26 13:09:18,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20735 conditions, 3902 events. 2265/3902 cut-off events. For 19954/19954 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 24235 event pairs, 192 based on Foata normal form. 11/3913 useless extension candidates. Maximal degree in co-relation 20699. Up to 1039 conditions per place. [2023-08-26 13:09:18,611 INFO L140 encePairwiseOnDemand]: 242/248 looper letters, 249 selfloop transitions, 283 changer transitions 14/546 dead transitions. [2023-08-26 13:09:18,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 546 transitions, 6967 flow [2023-08-26 13:09:18,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-26 13:09:18,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-26 13:09:18,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1406 transitions. [2023-08-26 13:09:18,614 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3779569892473118 [2023-08-26 13:09:18,614 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1406 transitions. [2023-08-26 13:09:18,615 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1406 transitions. [2023-08-26 13:09:18,615 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:09:18,615 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1406 transitions. [2023-08-26 13:09:18,617 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 93.73333333333333) internal successors, (1406), 15 states have internal predecessors, (1406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:09:18,620 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 248.0) internal successors, (3968), 16 states have internal predecessors, (3968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:09:18,621 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 248.0) internal successors, (3968), 16 states have internal predecessors, (3968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:09:18,621 INFO L175 Difference]: Start difference. First operand has 86 places, 143 transitions, 1639 flow. Second operand 15 states and 1406 transitions. [2023-08-26 13:09:18,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 546 transitions, 6967 flow [2023-08-26 13:09:18,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 546 transitions, 6495 flow, removed 233 selfloop flow, removed 2 redundant places. [2023-08-26 13:09:18,691 INFO L231 Difference]: Finished difference. Result has 107 places, 387 transitions, 5298 flow [2023-08-26 13:09:18,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=1499, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=5298, PETRI_PLACES=107, PETRI_TRANSITIONS=387} [2023-08-26 13:09:18,692 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 80 predicate places. [2023-08-26 13:09:18,693 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 387 transitions, 5298 flow [2023-08-26 13:09:18,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 87.64285714285714) internal successors, (1227), 14 states have internal predecessors, (1227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:09:18,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:09:18,693 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:09:18,717 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-26 13:09:18,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:09:18,898 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:09:18,898 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:09:18,898 INFO L85 PathProgramCache]: Analyzing trace with hash 392954559, now seen corresponding path program 1 times [2023-08-26 13:09:18,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:09:18,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861962980] [2023-08-26 13:09:18,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:09:18,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:09:18,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:09:18,954 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 13:09:18,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:09:18,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861962980] [2023-08-26 13:09:18,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861962980] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:09:18,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212664293] [2023-08-26 13:09:18,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:09:18,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:09:18,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:09:18,974 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) [2023-08-26 13:09:18,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-26 13:09:19,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:09:19,024 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-26 13:09:19,025 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:09:19,085 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 13:09:19,085 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:09:19,108 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 13:09:19,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212664293] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:09:19,109 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:09:19,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2023-08-26 13:09:19,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873820243] [2023-08-26 13:09:19,109 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:09:19,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-26 13:09:19,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:09:19,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-26 13:09:19,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2023-08-26 13:09:19,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 248 [2023-08-26 13:09:19,112 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 387 transitions, 5298 flow. Second operand has 10 states, 10 states have (on average 104.9) internal successors, (1049), 10 states have internal predecessors, (1049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:09:19,112 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:09:19,112 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 248 [2023-08-26 13:09:19,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:09:20,051 INFO L124 PetriNetUnfolderBase]: 3515/6235 cut-off events. [2023-08-26 13:09:20,051 INFO L125 PetriNetUnfolderBase]: For 48128/48128 co-relation queries the response was YES. [2023-08-26 13:09:20,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36334 conditions, 6235 events. 3515/6235 cut-off events. For 48128/48128 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 44249 event pairs, 53 based on Foata normal form. 124/6359 useless extension candidates. Maximal degree in co-relation 36288. Up to 1623 conditions per place. [2023-08-26 13:09:20,108 INFO L140 encePairwiseOnDemand]: 242/248 looper letters, 630 selfloop transitions, 225 changer transitions 1/856 dead transitions. [2023-08-26 13:09:20,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 856 transitions, 12592 flow [2023-08-26 13:09:20,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-26 13:09:20,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-26 13:09:20,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1313 transitions. [2023-08-26 13:09:20,113 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4411962365591398 [2023-08-26 13:09:20,113 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1313 transitions. [2023-08-26 13:09:20,113 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1313 transitions. [2023-08-26 13:09:20,114 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:09:20,114 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1313 transitions. [2023-08-26 13:09:20,116 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 109.41666666666667) internal successors, (1313), 12 states have internal predecessors, (1313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:09:20,119 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 248.0) internal successors, (3224), 13 states have internal predecessors, (3224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:09:20,120 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 248.0) internal successors, (3224), 13 states have internal predecessors, (3224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:09:20,120 INFO L175 Difference]: Start difference. First operand has 107 places, 387 transitions, 5298 flow. Second operand 12 states and 1313 transitions. [2023-08-26 13:09:20,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 856 transitions, 12592 flow [2023-08-26 13:09:20,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 856 transitions, 12189 flow, removed 186 selfloop flow, removed 5 redundant places. [2023-08-26 13:09:20,255 INFO L231 Difference]: Finished difference. Result has 121 places, 539 transitions, 8388 flow [2023-08-26 13:09:20,255 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=5091, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8388, PETRI_PLACES=121, PETRI_TRANSITIONS=539} [2023-08-26 13:09:20,256 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 94 predicate places. [2023-08-26 13:09:20,256 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 539 transitions, 8388 flow [2023-08-26 13:09:20,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 104.9) internal successors, (1049), 10 states have internal predecessors, (1049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:09:20,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:09:20,256 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:09:20,261 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-26 13:09:20,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-26 13:09:20,462 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:09:20,463 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:09:20,463 INFO L85 PathProgramCache]: Analyzing trace with hash -525945127, now seen corresponding path program 2 times [2023-08-26 13:09:20,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:09:20,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532096856] [2023-08-26 13:09:20,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:09:20,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:09:20,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:09:20,709 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:09:20,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:09:20,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532096856] [2023-08-26 13:09:20,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532096856] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:09:20,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257360972] [2023-08-26 13:09:20,710 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 13:09:20,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:09:20,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:09:20,711 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 13:09:20,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-26 13:09:20,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 13:09:20,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:09:20,848 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-26 13:09:20,849 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:09:21,054 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:09:21,054 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:09:25,646 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:09:25,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257360972] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:09:25,646 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:09:25,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 5] total 16 [2023-08-26 13:09:25,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473061457] [2023-08-26 13:09:25,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:09:25,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-26 13:09:25,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:09:25,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-26 13:09:25,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=243, Unknown=2, NotChecked=0, Total=306 [2023-08-26 13:09:25,648 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 248 [2023-08-26 13:09:25,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 539 transitions, 8388 flow. Second operand has 18 states, 18 states have (on average 94.5) internal successors, (1701), 18 states have internal predecessors, (1701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:09:25,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:09:25,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 248 [2023-08-26 13:09:25,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:09:29,030 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.99s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-26 13:09:39,093 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-26 13:09:47,201 INFO L124 PetriNetUnfolderBase]: 4723/8399 cut-off events. [2023-08-26 13:09:47,201 INFO L125 PetriNetUnfolderBase]: For 88725/88725 co-relation queries the response was YES. [2023-08-26 13:09:47,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54881 conditions, 8399 events. 4723/8399 cut-off events. For 88725/88725 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 60433 event pairs, 446 based on Foata normal form. 29/8428 useless extension candidates. Maximal degree in co-relation 54827. Up to 5969 conditions per place. [2023-08-26 13:09:47,314 INFO L140 encePairwiseOnDemand]: 242/248 looper letters, 664 selfloop transitions, 220 changer transitions 24/908 dead transitions. [2023-08-26 13:09:47,315 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 908 transitions, 15528 flow [2023-08-26 13:09:47,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-26 13:09:47,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-26 13:09:47,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1610 transitions. [2023-08-26 13:09:47,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4057459677419355 [2023-08-26 13:09:47,319 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1610 transitions. [2023-08-26 13:09:47,319 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1610 transitions. [2023-08-26 13:09:47,320 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:09:47,320 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1610 transitions. [2023-08-26 13:09:47,323 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 100.625) internal successors, (1610), 16 states have internal predecessors, (1610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:09:47,327 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 248.0) internal successors, (4216), 17 states have internal predecessors, (4216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:09:47,328 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 248.0) internal successors, (4216), 17 states have internal predecessors, (4216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:09:47,328 INFO L175 Difference]: Start difference. First operand has 121 places, 539 transitions, 8388 flow. Second operand 16 states and 1610 transitions. [2023-08-26 13:09:47,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 908 transitions, 15528 flow [2023-08-26 13:09:47,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 908 transitions, 14750 flow, removed 378 selfloop flow, removed 3 redundant places. [2023-08-26 13:09:47,748 INFO L231 Difference]: Finished difference. Result has 141 places, 705 transitions, 11496 flow [2023-08-26 13:09:47,748 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=7896, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=539, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=11496, PETRI_PLACES=141, PETRI_TRANSITIONS=705} [2023-08-26 13:09:47,748 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 114 predicate places. [2023-08-26 13:09:47,748 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 705 transitions, 11496 flow [2023-08-26 13:09:47,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 94.5) internal successors, (1701), 18 states have internal predecessors, (1701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:09:47,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:09:47,749 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:09:47,772 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-08-26 13:09:47,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-26 13:09:47,953 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:09:47,953 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:09:47,953 INFO L85 PathProgramCache]: Analyzing trace with hash -1930546461, now seen corresponding path program 3 times [2023-08-26 13:09:47,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:09:47,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894416834] [2023-08-26 13:09:47,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:09:47,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:09:47,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:09:48,027 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 13:09:48,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:09:48,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894416834] [2023-08-26 13:09:48,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894416834] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:09:48,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161126287] [2023-08-26 13:09:48,028 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-26 13:09:48,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:09:48,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:09:48,029 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) [2023-08-26 13:09:48,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-26 13:09:48,132 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-26 13:09:48,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:09:48,132 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-26 13:09:48,134 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:09:48,182 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 13:09:48,182 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:09:48,201 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 13:09:48,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161126287] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:09:48,202 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:09:48,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 8 [2023-08-26 13:09:48,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598430464] [2023-08-26 13:09:48,202 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:09:48,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-26 13:09:48,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:09:48,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-26 13:09:48,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-08-26 13:09:48,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 248 [2023-08-26 13:09:48,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 705 transitions, 11496 flow. Second operand has 9 states, 9 states have (on average 105.11111111111111) internal successors, (946), 9 states have internal predecessors, (946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:09:48,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:09:48,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 248 [2023-08-26 13:09:48,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:09:50,254 INFO L124 PetriNetUnfolderBase]: 5218/9720 cut-off events. [2023-08-26 13:09:50,254 INFO L125 PetriNetUnfolderBase]: For 110491/110491 co-relation queries the response was YES. [2023-08-26 13:09:50,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64953 conditions, 9720 events. 5218/9720 cut-off events. For 110491/110491 co-relation queries the response was YES. Maximal size of possible extension queue 568. Compared 75799 event pairs, 602 based on Foata normal form. 36/9756 useless extension candidates. Maximal degree in co-relation 64892. Up to 3856 conditions per place. [2023-08-26 13:09:50,343 INFO L140 encePairwiseOnDemand]: 242/248 looper letters, 641 selfloop transitions, 537 changer transitions 6/1184 dead transitions. [2023-08-26 13:09:50,343 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 1184 transitions, 21125 flow [2023-08-26 13:09:50,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-26 13:09:50,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-26 13:09:50,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1521 transitions. [2023-08-26 13:09:50,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43807603686635943 [2023-08-26 13:09:50,345 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1521 transitions. [2023-08-26 13:09:50,345 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1521 transitions. [2023-08-26 13:09:50,346 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:09:50,346 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1521 transitions. [2023-08-26 13:09:50,348 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 108.64285714285714) internal successors, (1521), 14 states have internal predecessors, (1521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:09:50,351 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 248.0) internal successors, (3720), 15 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:09:50,351 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 248.0) internal successors, (3720), 15 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:09:50,351 INFO L175 Difference]: Start difference. First operand has 141 places, 705 transitions, 11496 flow. Second operand 14 states and 1521 transitions. [2023-08-26 13:09:50,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 1184 transitions, 21125 flow [2023-08-26 13:09:50,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 1184 transitions, 20398 flow, removed 355 selfloop flow, removed 7 redundant places. [2023-08-26 13:09:51,005 INFO L231 Difference]: Finished difference. Result has 151 places, 886 transitions, 15964 flow [2023-08-26 13:09:51,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=11095, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=705, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=362, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=15964, PETRI_PLACES=151, PETRI_TRANSITIONS=886} [2023-08-26 13:09:51,006 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 124 predicate places. [2023-08-26 13:09:51,006 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 886 transitions, 15964 flow [2023-08-26 13:09:51,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 105.11111111111111) internal successors, (946), 9 states have internal predecessors, (946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:09:51,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:09:51,007 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:09:51,028 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-26 13:09:51,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:09:51,211 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:09:51,213 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:09:51,213 INFO L85 PathProgramCache]: Analyzing trace with hash -276168687, now seen corresponding path program 4 times [2023-08-26 13:09:51,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:09:51,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202599159] [2023-08-26 13:09:51,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:09:51,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:09:51,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:09:51,544 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:09:51,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:09:51,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202599159] [2023-08-26 13:09:51,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202599159] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:09:51,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823882833] [2023-08-26 13:09:51,545 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-26 13:09:51,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:09:51,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:09:51,546 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) [2023-08-26 13:09:51,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-26 13:09:51,697 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-26 13:09:51,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:09:51,698 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-26 13:09:51,699 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:09:51,915 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:09:51,915 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:09:52,228 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:09:52,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823882833] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:09:52,228 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:09:52,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2023-08-26 13:09:52,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728548328] [2023-08-26 13:09:52,229 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:09:52,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-26 13:09:52,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:09:52,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-26 13:09:52,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2023-08-26 13:09:52,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 248 [2023-08-26 13:09:52,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 886 transitions, 15964 flow. Second operand has 19 states, 19 states have (on average 94.26315789473684) internal successors, (1791), 19 states have internal predecessors, (1791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:09:52,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:09:52,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 248 [2023-08-26 13:09:52,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:10:02,995 INFO L124 PetriNetUnfolderBase]: 6460/12061 cut-off events. [2023-08-26 13:10:02,996 INFO L125 PetriNetUnfolderBase]: For 166779/166779 co-relation queries the response was YES. [2023-08-26 13:10:03,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86610 conditions, 12061 events. 6460/12061 cut-off events. For 166779/166779 co-relation queries the response was YES. Maximal size of possible extension queue 708. Compared 98117 event pairs, 662 based on Foata normal form. 33/12094 useless extension candidates. Maximal degree in co-relation 86547. Up to 5816 conditions per place. [2023-08-26 13:10:03,084 INFO L140 encePairwiseOnDemand]: 242/248 looper letters, 575 selfloop transitions, 843 changer transitions 21/1439 dead transitions. [2023-08-26 13:10:03,084 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 1439 transitions, 28112 flow [2023-08-26 13:10:03,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-08-26 13:10:03,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-08-26 13:10:03,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 3082 transitions. [2023-08-26 13:10:03,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40088449531737774 [2023-08-26 13:10:03,088 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 3082 transitions. [2023-08-26 13:10:03,088 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 3082 transitions. [2023-08-26 13:10:03,088 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:10:03,088 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 3082 transitions. [2023-08-26 13:10:03,092 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 99.41935483870968) internal successors, (3082), 31 states have internal predecessors, (3082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:03,097 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 248.0) internal successors, (7936), 32 states have internal predecessors, (7936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:03,097 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 248.0) internal successors, (7936), 32 states have internal predecessors, (7936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:03,097 INFO L175 Difference]: Start difference. First operand has 151 places, 886 transitions, 15964 flow. Second operand 31 states and 3082 transitions. [2023-08-26 13:10:03,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 1439 transitions, 28112 flow [2023-08-26 13:10:04,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 1439 transitions, 27555 flow, removed 251 selfloop flow, removed 6 redundant places. [2023-08-26 13:10:04,476 INFO L231 Difference]: Finished difference. Result has 185 places, 1261 transitions, 26794 flow [2023-08-26 13:10:04,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=15411, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=870, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=494, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=26794, PETRI_PLACES=185, PETRI_TRANSITIONS=1261} [2023-08-26 13:10:04,477 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 158 predicate places. [2023-08-26 13:10:04,477 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 1261 transitions, 26794 flow [2023-08-26 13:10:04,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 94.26315789473684) internal successors, (1791), 19 states have internal predecessors, (1791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:04,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:10:04,478 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:10:04,486 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-26 13:10:04,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-26 13:10:04,684 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:10:04,685 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:10:04,685 INFO L85 PathProgramCache]: Analyzing trace with hash -622664071, now seen corresponding path program 5 times [2023-08-26 13:10:04,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:10:04,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920939645] [2023-08-26 13:10:04,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:10:04,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:10:04,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:10:05,038 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:10:05,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:10:05,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920939645] [2023-08-26 13:10:05,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920939645] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:10:05,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109321610] [2023-08-26 13:10:05,039 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-26 13:10:05,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:10:05,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:10:05,047 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) [2023-08-26 13:10:05,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-26 13:10:05,241 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-26 13:10:05,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:10:05,243 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-26 13:10:05,244 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:10:05,476 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:10:05,476 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:10:05,839 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:10:05,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109321610] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:10:05,839 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:10:05,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 18 [2023-08-26 13:10:05,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998145908] [2023-08-26 13:10:05,840 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:10:05,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-26 13:10:05,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:10:05,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-26 13:10:05,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2023-08-26 13:10:05,843 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 248 [2023-08-26 13:10:05,844 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 1261 transitions, 26794 flow. Second operand has 20 states, 20 states have (on average 87.15) internal successors, (1743), 20 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:05,844 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:10:05,844 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 248 [2023-08-26 13:10:05,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:10:15,300 INFO L124 PetriNetUnfolderBase]: 7259/13369 cut-off events. [2023-08-26 13:10:15,301 INFO L125 PetriNetUnfolderBase]: For 221913/221913 co-relation queries the response was YES. [2023-08-26 13:10:15,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104406 conditions, 13369 events. 7259/13369 cut-off events. For 221913/221913 co-relation queries the response was YES. Maximal size of possible extension queue 788. Compared 109057 event pairs, 744 based on Foata normal form. 14/13383 useless extension candidates. Maximal degree in co-relation 104336. Up to 4851 conditions per place. [2023-08-26 13:10:15,447 INFO L140 encePairwiseOnDemand]: 242/248 looper letters, 495 selfloop transitions, 1120 changer transitions 13/1628 dead transitions. [2023-08-26 13:10:15,447 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 1628 transitions, 36915 flow [2023-08-26 13:10:15,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-26 13:10:15,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-26 13:10:15,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2199 transitions. [2023-08-26 13:10:15,451 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3694556451612903 [2023-08-26 13:10:15,451 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2199 transitions. [2023-08-26 13:10:15,451 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2199 transitions. [2023-08-26 13:10:15,451 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:10:15,451 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2199 transitions. [2023-08-26 13:10:15,454 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 91.625) internal successors, (2199), 24 states have internal predecessors, (2199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:15,458 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 248.0) internal successors, (6200), 25 states have internal predecessors, (6200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:15,459 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 248.0) internal successors, (6200), 25 states have internal predecessors, (6200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:15,459 INFO L175 Difference]: Start difference. First operand has 185 places, 1261 transitions, 26794 flow. Second operand 24 states and 2199 transitions. [2023-08-26 13:10:15,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 1628 transitions, 36915 flow [2023-08-26 13:10:17,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 1628 transitions, 35509 flow, removed 686 selfloop flow, removed 9 redundant places. [2023-08-26 13:10:17,623 INFO L231 Difference]: Finished difference. Result has 206 places, 1483 transitions, 34108 flow [2023-08-26 13:10:17,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=25544, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=918, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=34108, PETRI_PLACES=206, PETRI_TRANSITIONS=1483} [2023-08-26 13:10:17,624 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 179 predicate places. [2023-08-26 13:10:17,624 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 1483 transitions, 34108 flow [2023-08-26 13:10:17,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 87.15) internal successors, (1743), 20 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:17,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:10:17,625 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:10:17,629 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-08-26 13:10:17,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-26 13:10:17,829 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:10:17,830 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:10:17,830 INFO L85 PathProgramCache]: Analyzing trace with hash -61551611, now seen corresponding path program 6 times [2023-08-26 13:10:17,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:10:17,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929025531] [2023-08-26 13:10:17,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:10:17,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:10:17,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:10:17,899 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:10:17,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:10:17,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929025531] [2023-08-26 13:10:17,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929025531] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:10:17,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183484150] [2023-08-26 13:10:17,899 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-26 13:10:17,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:10:17,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:10:17,913 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) [2023-08-26 13:10:17,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-26 13:10:18,061 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-26 13:10:18,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:10:18,062 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-26 13:10:18,063 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:10:18,120 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:10:18,120 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:10:18,144 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:10:18,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183484150] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:10:18,144 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:10:18,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2023-08-26 13:10:18,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967593066] [2023-08-26 13:10:18,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:10:18,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-26 13:10:18,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:10:18,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-26 13:10:18,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2023-08-26 13:10:18,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 248 [2023-08-26 13:10:18,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 1483 transitions, 34108 flow. Second operand has 10 states, 10 states have (on average 104.8) internal successors, (1048), 10 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:18,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:10:18,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 248 [2023-08-26 13:10:18,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:10:23,760 INFO L124 PetriNetUnfolderBase]: 8665/15681 cut-off events. [2023-08-26 13:10:23,761 INFO L125 PetriNetUnfolderBase]: For 287843/287843 co-relation queries the response was YES. [2023-08-26 13:10:23,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130940 conditions, 15681 events. 8665/15681 cut-off events. For 287843/287843 co-relation queries the response was YES. Maximal size of possible extension queue 997. Compared 129201 event pairs, 790 based on Foata normal form. 272/15953 useless extension candidates. Maximal degree in co-relation 130862. Up to 6263 conditions per place. [2023-08-26 13:10:23,899 INFO L140 encePairwiseOnDemand]: 242/248 looper letters, 1160 selfloop transitions, 1118 changer transitions 0/2278 dead transitions. [2023-08-26 13:10:23,899 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 2278 transitions, 53917 flow [2023-08-26 13:10:23,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-26 13:10:23,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-26 13:10:23,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1524 transitions. [2023-08-26 13:10:23,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43894009216589863 [2023-08-26 13:10:23,917 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1524 transitions. [2023-08-26 13:10:23,917 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1524 transitions. [2023-08-26 13:10:23,918 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:10:23,918 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1524 transitions. [2023-08-26 13:10:23,919 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 108.85714285714286) internal successors, (1524), 14 states have internal predecessors, (1524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:23,921 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 248.0) internal successors, (3720), 15 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:23,922 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 248.0) internal successors, (3720), 15 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:23,922 INFO L175 Difference]: Start difference. First operand has 206 places, 1483 transitions, 34108 flow. Second operand 14 states and 1524 transitions. [2023-08-26 13:10:23,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 2278 transitions, 53917 flow [2023-08-26 13:10:28,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 2278 transitions, 52021 flow, removed 934 selfloop flow, removed 7 redundant places. [2023-08-26 13:10:28,054 INFO L231 Difference]: Finished difference. Result has 220 places, 1818 transitions, 45353 flow [2023-08-26 13:10:28,056 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=32655, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1481, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=800, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=580, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=45353, PETRI_PLACES=220, PETRI_TRANSITIONS=1818} [2023-08-26 13:10:28,056 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 193 predicate places. [2023-08-26 13:10:28,056 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 1818 transitions, 45353 flow [2023-08-26 13:10:28,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 104.8) internal successors, (1048), 10 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:28,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:10:28,056 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:10:28,061 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-08-26 13:10:28,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:10:28,261 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:10:28,261 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:10:28,261 INFO L85 PathProgramCache]: Analyzing trace with hash 817688773, now seen corresponding path program 7 times [2023-08-26 13:10:28,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:10:28,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303224268] [2023-08-26 13:10:28,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:10:28,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:10:28,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:10:28,332 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 13:10:28,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:10:28,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303224268] [2023-08-26 13:10:28,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303224268] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:10:28,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210479320] [2023-08-26 13:10:28,333 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-26 13:10:28,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:10:28,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:10:28,334 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) [2023-08-26 13:10:28,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-26 13:10:28,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:10:28,411 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-26 13:10:28,412 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:10:28,476 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:10:28,476 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:10:28,499 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 13:10:28,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210479320] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:10:28,499 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:10:28,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 8 [2023-08-26 13:10:28,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443768494] [2023-08-26 13:10:28,499 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:10:28,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-26 13:10:28,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:10:28,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-26 13:10:28,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-08-26 13:10:28,502 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 248 [2023-08-26 13:10:28,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 1818 transitions, 45353 flow. Second operand has 9 states, 9 states have (on average 105.22222222222223) internal successors, (947), 9 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) [2023-08-26 13:10:28,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:10:28,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 248 [2023-08-26 13:10:28,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:10:36,059 INFO L124 PetriNetUnfolderBase]: 9118/16423 cut-off events. [2023-08-26 13:10:36,060 INFO L125 PetriNetUnfolderBase]: For 378490/378490 co-relation queries the response was YES. [2023-08-26 13:10:36,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 149478 conditions, 16423 events. 9118/16423 cut-off events. For 378490/378490 co-relation queries the response was YES. Maximal size of possible extension queue 1068. Compared 135610 event pairs, 96 based on Foata normal form. 136/16559 useless extension candidates. Maximal degree in co-relation 149393. Up to 4617 conditions per place. [2023-08-26 13:10:36,217 INFO L140 encePairwiseOnDemand]: 242/248 looper letters, 1724 selfloop transitions, 841 changer transitions 0/2565 dead transitions. [2023-08-26 13:10:36,217 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 2565 transitions, 61724 flow [2023-08-26 13:10:36,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-26 13:10:36,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-26 13:10:36,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1626 transitions. [2023-08-26 13:10:36,226 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43709677419354837 [2023-08-26 13:10:36,226 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1626 transitions. [2023-08-26 13:10:36,226 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1626 transitions. [2023-08-26 13:10:36,227 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:10:36,227 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1626 transitions. [2023-08-26 13:10:36,241 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 108.4) internal successors, (1626), 15 states have internal predecessors, (1626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:36,244 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 248.0) internal successors, (3968), 16 states have internal predecessors, (3968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:36,244 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 248.0) internal successors, (3968), 16 states have internal predecessors, (3968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:36,244 INFO L175 Difference]: Start difference. First operand has 220 places, 1818 transitions, 45353 flow. Second operand 15 states and 1626 transitions. [2023-08-26 13:10:36,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 2565 transitions, 61724 flow [2023-08-26 13:10:41,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 2565 transitions, 61247 flow, removed 231 selfloop flow, removed 2 redundant places. [2023-08-26 13:10:41,704 INFO L231 Difference]: Finished difference. Result has 236 places, 1924 transitions, 50523 flow [2023-08-26 13:10:41,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=44120, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1788, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=717, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1065, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=50523, PETRI_PLACES=236, PETRI_TRANSITIONS=1924} [2023-08-26 13:10:41,705 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 209 predicate places. [2023-08-26 13:10:41,705 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 1924 transitions, 50523 flow [2023-08-26 13:10:41,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 105.22222222222223) internal successors, (947), 9 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) [2023-08-26 13:10:41,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:10:41,706 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:10:41,727 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-26 13:10:41,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:10:41,910 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:10:41,910 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:10:41,911 INFO L85 PathProgramCache]: Analyzing trace with hash 1716714601, now seen corresponding path program 8 times [2023-08-26 13:10:41,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:10:41,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665328664] [2023-08-26 13:10:41,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:10:41,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:10:41,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:10:42,217 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:10:42,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:10:42,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665328664] [2023-08-26 13:10:42,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665328664] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:10:42,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105464623] [2023-08-26 13:10:42,218 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 13:10:42,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:10:42,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:10:42,229 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) [2023-08-26 13:10:42,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-26 13:10:42,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 13:10:42,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:10:42,392 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-26 13:10:42,393 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:10:42,614 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:10:42,614 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:10:43,044 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 13:10:43,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105464623] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:10:43,045 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:10:43,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 5] total 16 [2023-08-26 13:10:43,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880429544] [2023-08-26 13:10:43,045 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:10:43,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-26 13:10:43,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:10:43,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-26 13:10:43,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2023-08-26 13:10:43,047 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 248 [2023-08-26 13:10:43,048 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 1924 transitions, 50523 flow. Second operand has 18 states, 18 states have (on average 94.38888888888889) internal successors, (1699), 18 states have internal predecessors, (1699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:43,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:10:43,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 248 [2023-08-26 13:10:43,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:10:55,336 INFO L124 PetriNetUnfolderBase]: 10278/18462 cut-off events. [2023-08-26 13:10:55,336 INFO L125 PetriNetUnfolderBase]: For 487698/487698 co-relation queries the response was YES. [2023-08-26 13:10:55,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 178109 conditions, 18462 events. 10278/18462 cut-off events. For 487698/487698 co-relation queries the response was YES. Maximal size of possible extension queue 1245. Compared 155307 event pairs, 828 based on Foata normal form. 20/18482 useless extension candidates. Maximal degree in co-relation 178020. Up to 9153 conditions per place. [2023-08-26 13:10:55,816 INFO L140 encePairwiseOnDemand]: 242/248 looper letters, 816 selfloop transitions, 1580 changer transitions 24/2420 dead transitions. [2023-08-26 13:10:55,816 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 2420 transitions, 67739 flow [2023-08-26 13:10:55,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-26 13:10:55,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-26 13:10:55,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 2470 transitions. [2023-08-26 13:10:55,818 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39838709677419354 [2023-08-26 13:10:55,818 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 2470 transitions. [2023-08-26 13:10:55,818 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 2470 transitions. [2023-08-26 13:10:55,819 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:10:55,819 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 2470 transitions. [2023-08-26 13:10:55,821 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 98.8) internal successors, (2470), 25 states have internal predecessors, (2470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:55,824 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 248.0) internal successors, (6448), 26 states have internal predecessors, (6448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:55,825 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 248.0) internal successors, (6448), 26 states have internal predecessors, (6448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:55,825 INFO L175 Difference]: Start difference. First operand has 236 places, 1924 transitions, 50523 flow. Second operand 25 states and 2470 transitions. [2023-08-26 13:10:55,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 2420 transitions, 67739 flow [2023-08-26 13:11:03,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 2420 transitions, 66750 flow, removed 152 selfloop flow, removed 4 redundant places. [2023-08-26 13:11:03,454 INFO L231 Difference]: Finished difference. Result has 267 places, 2274 transitions, 66483 flow [2023-08-26 13:11:03,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=49884, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1924, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1256, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=595, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=66483, PETRI_PLACES=267, PETRI_TRANSITIONS=2274} [2023-08-26 13:11:03,455 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 240 predicate places. [2023-08-26 13:11:03,455 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 2274 transitions, 66483 flow [2023-08-26 13:11:03,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 94.38888888888889) internal successors, (1699), 18 states have internal predecessors, (1699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:03,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:11:03,455 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:11:03,460 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-08-26 13:11:03,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-08-26 13:11:03,662 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:11:03,662 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:11:03,662 INFO L85 PathProgramCache]: Analyzing trace with hash 1203429627, now seen corresponding path program 9 times [2023-08-26 13:11:03,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:11:03,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461663100] [2023-08-26 13:11:03,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:11:03,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:11:03,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:11:03,961 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:11:03,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:11:03,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461663100] [2023-08-26 13:11:03,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461663100] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:11:03,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2147132299] [2023-08-26 13:11:03,962 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-26 13:11:03,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:11:03,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:11:03,977 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) [2023-08-26 13:11:03,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-26 13:11:04,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-26 13:11:04,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:11:04,052 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-26 13:11:04,053 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:11:04,257 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:11:04,258 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:11:04,465 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:11:04,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2147132299] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:11:04,465 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:11:04,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2023-08-26 13:11:04,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131672326] [2023-08-26 13:11:04,465 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:11:04,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-26 13:11:04,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:11:04,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-26 13:11:04,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2023-08-26 13:11:04,467 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 248 [2023-08-26 13:11:04,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 2274 transitions, 66483 flow. Second operand has 19 states, 19 states have (on average 94.26315789473684) internal successors, (1791), 19 states have internal predecessors, (1791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:04,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:11:04,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 248 [2023-08-26 13:11:04,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:11:22,172 INFO L124 PetriNetUnfolderBase]: 14284/25760 cut-off events. [2023-08-26 13:11:22,172 INFO L125 PetriNetUnfolderBase]: For 796073/796073 co-relation queries the response was YES. [2023-08-26 13:11:22,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 265322 conditions, 25760 events. 14284/25760 cut-off events. For 796073/796073 co-relation queries the response was YES. Maximal size of possible extension queue 1661. Compared 228589 event pairs, 1307 based on Foata normal form. 43/25803 useless extension candidates. Maximal degree in co-relation 265224. Up to 9856 conditions per place. [2023-08-26 13:11:22,470 INFO L140 encePairwiseOnDemand]: 242/248 looper letters, 1037 selfloop transitions, 2442 changer transitions 33/3512 dead transitions. [2023-08-26 13:11:22,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 3512 transitions, 109653 flow [2023-08-26 13:11:22,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-08-26 13:11:22,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-08-26 13:11:22,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 3355 transitions. [2023-08-26 13:11:22,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3978889943074004 [2023-08-26 13:11:22,473 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 3355 transitions. [2023-08-26 13:11:22,473 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 3355 transitions. [2023-08-26 13:11:22,474 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:11:22,474 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 3355 transitions. [2023-08-26 13:11:22,476 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 98.67647058823529) internal successors, (3355), 34 states have internal predecessors, (3355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:22,480 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 248.0) internal successors, (8680), 35 states have internal predecessors, (8680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:22,481 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 248.0) internal successors, (8680), 35 states have internal predecessors, (8680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:22,481 INFO L175 Difference]: Start difference. First operand has 267 places, 2274 transitions, 66483 flow. Second operand 34 states and 3355 transitions. [2023-08-26 13:11:22,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 3512 transitions, 109653 flow [2023-08-26 13:11:38,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 3512 transitions, 105913 flow, removed 1743 selfloop flow, removed 4 redundant places. [2023-08-26 13:11:38,406 INFO L231 Difference]: Finished difference. Result has 308 places, 3228 transitions, 103214 flow [2023-08-26 13:11:38,407 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=64214, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1552, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=602, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=103214, PETRI_PLACES=308, PETRI_TRANSITIONS=3228} [2023-08-26 13:11:38,407 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 281 predicate places. [2023-08-26 13:11:38,408 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 3228 transitions, 103214 flow [2023-08-26 13:11:38,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 94.26315789473684) internal successors, (1791), 19 states have internal predecessors, (1791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:38,408 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:11:38,408 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:11:38,414 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-26 13:11:38,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-08-26 13:11:38,612 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:11:38,612 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:11:38,612 INFO L85 PathProgramCache]: Analyzing trace with hash 633219860, now seen corresponding path program 10 times [2023-08-26 13:11:38,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:11:38,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425317902] [2023-08-26 13:11:38,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:11:38,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:11:38,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:11:38,658 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-26 13:11:38,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:11:38,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425317902] [2023-08-26 13:11:38,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425317902] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:11:38,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274106014] [2023-08-26 13:11:38,658 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-26 13:11:38,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:11:38,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:11:38,659 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) [2023-08-26 13:11:38,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-26 13:11:38,711 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-26 13:11:38,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:11:38,711 INFO L262 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-26 13:11:38,712 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:11:38,730 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-26 13:11:38,730 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:11:38,747 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-26 13:11:38,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274106014] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:11:38,747 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:11:38,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-08-26 13:11:38,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019855493] [2023-08-26 13:11:38,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:11:38,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-26 13:11:38,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:11:38,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-26 13:11:38,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-08-26 13:11:38,749 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 248 [2023-08-26 13:11:38,749 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 3228 transitions, 103214 flow. Second operand has 8 states, 8 states have (on average 109.25) internal successors, (874), 8 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:38,749 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:11:38,749 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 248 [2023-08-26 13:11:38,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:11:54,337 INFO L124 PetriNetUnfolderBase]: 10963/19697 cut-off events. [2023-08-26 13:11:54,352 INFO L125 PetriNetUnfolderBase]: For 734074/734074 co-relation queries the response was YES. [2023-08-26 13:11:54,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 203191 conditions, 19697 events. 10963/19697 cut-off events. For 734074/734074 co-relation queries the response was YES. Maximal size of possible extension queue 1372. Compared 169275 event pairs, 880 based on Foata normal form. 1152/20849 useless extension candidates. Maximal degree in co-relation 203081. Up to 11561 conditions per place. [2023-08-26 13:11:54,586 INFO L140 encePairwiseOnDemand]: 245/248 looper letters, 1983 selfloop transitions, 623 changer transitions 2/2608 dead transitions. [2023-08-26 13:11:54,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 2608 transitions, 86077 flow [2023-08-26 13:11:54,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 13:11:54,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 13:11:54,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 571 transitions. [2023-08-26 13:11:54,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46048387096774196 [2023-08-26 13:11:54,587 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 571 transitions. [2023-08-26 13:11:54,587 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 571 transitions. [2023-08-26 13:11:54,588 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:11:54,588 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 571 transitions. [2023-08-26 13:11:54,588 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 114.2) internal successors, (571), 5 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:54,589 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 248.0) internal successors, (1488), 6 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:54,589 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 248.0) internal successors, (1488), 6 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:54,589 INFO L175 Difference]: Start difference. First operand has 308 places, 3228 transitions, 103214 flow. Second operand 5 states and 571 transitions. [2023-08-26 13:11:54,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 2608 transitions, 86077 flow [2023-08-26 13:12:06,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 2608 transitions, 79366 flow, removed 2100 selfloop flow, removed 10 redundant places. [2023-08-26 13:12:06,456 INFO L231 Difference]: Finished difference. Result has 301 places, 2387 transitions, 71544 flow [2023-08-26 13:12:06,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=64627, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=493, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1650, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=71544, PETRI_PLACES=301, PETRI_TRANSITIONS=2387} [2023-08-26 13:12:06,458 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 274 predicate places. [2023-08-26 13:12:06,458 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 2387 transitions, 71544 flow [2023-08-26 13:12:06,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 109.25) internal successors, (874), 8 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:12:06,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:12:06,458 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:12:06,462 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-08-26 13:12:06,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:12:06,662 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:12:06,662 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:12:06,662 INFO L85 PathProgramCache]: Analyzing trace with hash 434216482, now seen corresponding path program 11 times [2023-08-26 13:12:06,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:12:06,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902137511] [2023-08-26 13:12:06,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:12:06,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:12:06,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:12:06,698 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-26 13:12:06,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:12:06,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902137511] [2023-08-26 13:12:06,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902137511] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:12:06,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098320548] [2023-08-26 13:12:06,699 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-26 13:12:06,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:12:06,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:12:06,700 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) [2023-08-26 13:12:06,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-26 13:12:06,758 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-26 13:12:06,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:12:06,758 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-26 13:12:06,760 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:12:06,825 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-26 13:12:06,825 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:12:06,852 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-26 13:12:06,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098320548] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:12:06,852 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:12:06,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2023-08-26 13:12:06,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828648503] [2023-08-26 13:12:06,852 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:12:06,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-26 13:12:06,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:12:06,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-26 13:12:06,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2023-08-26 13:12:06,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 248 [2023-08-26 13:12:06,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 2387 transitions, 71544 flow. Second operand has 10 states, 10 states have (on average 105.4) internal successors, (1054), 10 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:12:06,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:12:06,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 248 [2023-08-26 13:12:06,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:12:18,434 INFO L124 PetriNetUnfolderBase]: 11178/20092 cut-off events. [2023-08-26 13:12:18,435 INFO L125 PetriNetUnfolderBase]: For 631681/631681 co-relation queries the response was YES. [2023-08-26 13:12:18,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 204013 conditions, 20092 events. 11178/20092 cut-off events. For 631681/631681 co-relation queries the response was YES. Maximal size of possible extension queue 1406. Compared 173207 event pairs, 1190 based on Foata normal form. 224/20316 useless extension candidates. Maximal degree in co-relation 203903. Up to 18978 conditions per place. [2023-08-26 13:12:18,659 INFO L140 encePairwiseOnDemand]: 242/248 looper letters, 2386 selfloop transitions, 172 changer transitions 0/2558 dead transitions. [2023-08-26 13:12:18,659 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 2558 transitions, 80379 flow [2023-08-26 13:12:18,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-26 13:12:18,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-26 13:12:18,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1428 transitions. [2023-08-26 13:12:18,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44292803970223327 [2023-08-26 13:12:18,660 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1428 transitions. [2023-08-26 13:12:18,660 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1428 transitions. [2023-08-26 13:12:18,661 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:12:18,661 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1428 transitions. [2023-08-26 13:12:18,662 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 109.84615384615384) internal successors, (1428), 13 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:12:18,663 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 248.0) internal successors, (3472), 14 states have internal predecessors, (3472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:12:18,664 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 248.0) internal successors, (3472), 14 states have internal predecessors, (3472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:12:18,664 INFO L175 Difference]: Start difference. First operand has 301 places, 2387 transitions, 71544 flow. Second operand 13 states and 1428 transitions. [2023-08-26 13:12:18,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 2558 transitions, 80379 flow [2023-08-26 13:12:27,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 2558 transitions, 80083 flow, removed 148 selfloop flow, removed 0 redundant places. [2023-08-26 13:12:27,898 INFO L231 Difference]: Finished difference. Result has 320 places, 2449 transitions, 73772 flow [2023-08-26 13:12:27,899 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=70710, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=73772, PETRI_PLACES=320, PETRI_TRANSITIONS=2449} [2023-08-26 13:12:27,900 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 293 predicate places. [2023-08-26 13:12:27,900 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 2449 transitions, 73772 flow [2023-08-26 13:12:27,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 105.4) internal successors, (1054), 10 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:12:27,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:12:27,900 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:12:27,906 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-08-26 13:12:28,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:12:28,104 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:12:28,104 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:12:28,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1164004510, now seen corresponding path program 12 times [2023-08-26 13:12:28,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:12:28,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303568860] [2023-08-26 13:12:28,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:12:28,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:12:28,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:12:28,150 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-26 13:12:28,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:12:28,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303568860] [2023-08-26 13:12:28,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303568860] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:12:28,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787438459] [2023-08-26 13:12:28,150 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-26 13:12:28,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:12:28,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:12:28,151 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) [2023-08-26 13:12:28,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-26 13:12:28,228 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-26 13:12:28,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:12:28,229 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-26 13:12:28,229 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:12:28,265 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-26 13:12:28,265 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:12:28,286 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-26 13:12:28,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787438459] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:12:28,286 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:12:28,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 8 [2023-08-26 13:12:28,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160789903] [2023-08-26 13:12:28,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:12:28,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-26 13:12:28,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:12:28,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-26 13:12:28,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-08-26 13:12:28,288 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 248 [2023-08-26 13:12:28,288 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 2449 transitions, 73772 flow. Second operand has 9 states, 9 states have (on average 105.33333333333333) internal successors, (948), 9 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:12:28,288 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:12:28,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 248 [2023-08-26 13:12:28,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:12:40,399 INFO L124 PetriNetUnfolderBase]: 11149/19996 cut-off events. [2023-08-26 13:12:40,399 INFO L125 PetriNetUnfolderBase]: For 715936/715936 co-relation queries the response was YES. [2023-08-26 13:12:40,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 213150 conditions, 19996 events. 11149/19996 cut-off events. For 715936/715936 co-relation queries the response was YES. Maximal size of possible extension queue 1396. Compared 172175 event pairs, 420 based on Foata normal form. 18/20014 useless extension candidates. Maximal degree in co-relation 213032. Up to 13270 conditions per place. [2023-08-26 13:12:40,638 INFO L140 encePairwiseOnDemand]: 242/248 looper letters, 2320 selfloop transitions, 253 changer transitions 8/2581 dead transitions. [2023-08-26 13:12:40,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 2581 transitions, 80976 flow [2023-08-26 13:12:40,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-26 13:12:40,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-26 13:12:40,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1621 transitions. [2023-08-26 13:12:40,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.435752688172043 [2023-08-26 13:12:40,640 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1621 transitions. [2023-08-26 13:12:40,640 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1621 transitions. [2023-08-26 13:12:40,640 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:12:40,640 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1621 transitions. [2023-08-26 13:12:40,641 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 108.06666666666666) internal successors, (1621), 15 states have internal predecessors, (1621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:12:40,643 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 248.0) internal successors, (3968), 16 states have internal predecessors, (3968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:12:40,643 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 248.0) internal successors, (3968), 16 states have internal predecessors, (3968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:12:40,643 INFO L175 Difference]: Start difference. First operand has 320 places, 2449 transitions, 73772 flow. Second operand 15 states and 1621 transitions. [2023-08-26 13:12:40,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 2581 transitions, 80976 flow [2023-08-26 13:12:51,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 2581 transitions, 80010 flow, removed 419 selfloop flow, removed 6 redundant places. [2023-08-26 13:12:51,631 INFO L231 Difference]: Finished difference. Result has 331 places, 2452 transitions, 73173 flow [2023-08-26 13:12:51,633 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=71973, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2428, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=230, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=73173, PETRI_PLACES=331, PETRI_TRANSITIONS=2452} [2023-08-26 13:12:51,633 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 304 predicate places. [2023-08-26 13:12:51,633 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 2452 transitions, 73173 flow [2023-08-26 13:12:51,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 105.33333333333333) internal successors, (948), 9 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:12:51,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:12:51,634 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:12:51,638 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-26 13:12:51,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-08-26 13:12:51,837 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:12:51,838 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:12:51,838 INFO L85 PathProgramCache]: Analyzing trace with hash -12508625, now seen corresponding path program 13 times [2023-08-26 13:12:51,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:12:51,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667128119] [2023-08-26 13:12:51,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:12:51,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:12:51,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:12:52,155 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:12:52,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:12:52,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667128119] [2023-08-26 13:12:52,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667128119] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:12:52,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984541506] [2023-08-26 13:12:52,155 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-26 13:12:52,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:12:52,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:12:52,156 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) [2023-08-26 13:12:52,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-26 13:12:52,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:12:52,315 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-26 13:12:52,316 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:12:52,617 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:12:52,617 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:12:53,016 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:12:53,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984541506] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:12:53,017 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:12:53,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 23 [2023-08-26 13:12:53,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33102321] [2023-08-26 13:12:53,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:12:53,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-26 13:12:53,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:12:53,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-26 13:12:53,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2023-08-26 13:12:53,019 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 248 [2023-08-26 13:12:53,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 2452 transitions, 73173 flow. Second operand has 25 states, 25 states have (on average 93.96) internal successors, (2349), 25 states have internal predecessors, (2349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:12:53,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:12:53,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 248 [2023-08-26 13:12:53,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:13:15,263 INFO L124 PetriNetUnfolderBase]: 12457/22113 cut-off events. [2023-08-26 13:13:15,264 INFO L125 PetriNetUnfolderBase]: For 828428/828428 co-relation queries the response was YES. [2023-08-26 13:13:15,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 239774 conditions, 22113 events. 12457/22113 cut-off events. For 828428/828428 co-relation queries the response was YES. Maximal size of possible extension queue 1510. Compared 189871 event pairs, 970 based on Foata normal form. 11/22124 useless extension candidates. Maximal degree in co-relation 239654. Up to 9363 conditions per place. [2023-08-26 13:13:15,760 INFO L140 encePairwiseOnDemand]: 242/248 looper letters, 908 selfloop transitions, 2116 changer transitions 30/3054 dead transitions. [2023-08-26 13:13:15,760 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 3054 transitions, 94492 flow [2023-08-26 13:13:15,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-08-26 13:13:15,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-08-26 13:13:15,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 4303 transitions. [2023-08-26 13:13:15,778 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39433651026392963 [2023-08-26 13:13:15,778 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 4303 transitions. [2023-08-26 13:13:15,778 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 4303 transitions. [2023-08-26 13:13:15,779 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:13:15,779 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 4303 transitions. [2023-08-26 13:13:15,782 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 97.79545454545455) internal successors, (4303), 44 states have internal predecessors, (4303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:13:15,787 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 248.0) internal successors, (11160), 45 states have internal predecessors, (11160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:13:15,788 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 248.0) internal successors, (11160), 45 states have internal predecessors, (11160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:13:15,788 INFO L175 Difference]: Start difference. First operand has 331 places, 2452 transitions, 73173 flow. Second operand 44 states and 4303 transitions. [2023-08-26 13:13:15,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 3054 transitions, 94492 flow [2023-08-26 13:13:28,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 3054 transitions, 93737 flow, removed 312 selfloop flow, removed 5 redundant places. [2023-08-26 13:13:28,814 INFO L231 Difference]: Finished difference. Result has 381 places, 2829 transitions, 90409 flow [2023-08-26 13:13:28,816 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=72688, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1768, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=639, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=90409, PETRI_PLACES=381, PETRI_TRANSITIONS=2829} [2023-08-26 13:13:28,816 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 354 predicate places. [2023-08-26 13:13:28,816 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 2829 transitions, 90409 flow [2023-08-26 13:13:28,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 93.96) internal successors, (2349), 25 states have internal predecessors, (2349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:13:28,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:13:28,817 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:13:28,821 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-26 13:13:29,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-08-26 13:13:29,021 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:13:29,021 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:13:29,021 INFO L85 PathProgramCache]: Analyzing trace with hash 2118270254, now seen corresponding path program 14 times [2023-08-26 13:13:29,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:13:29,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151273877] [2023-08-26 13:13:29,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:13:29,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:13:29,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:13:29,057 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-26 13:13:29,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:13:29,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151273877] [2023-08-26 13:13:29,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151273877] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:13:29,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889905502] [2023-08-26 13:13:29,057 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 13:13:29,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:13:29,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:13:29,058 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) [2023-08-26 13:13:29,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-26 13:13:29,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 13:13:29,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:13:29,135 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-26 13:13:29,136 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:13:29,182 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 13:13:29,182 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:13:29,202 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-26 13:13:29,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889905502] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:13:29,202 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:13:29,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 8 [2023-08-26 13:13:29,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146712502] [2023-08-26 13:13:29,202 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:13:29,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-26 13:13:29,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:13:29,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-26 13:13:29,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-08-26 13:13:29,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 248 [2023-08-26 13:13:29,204 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 2829 transitions, 90409 flow. Second operand has 9 states, 9 states have (on average 105.22222222222223) internal successors, (947), 9 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) [2023-08-26 13:13:29,204 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:13:29,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 248 [2023-08-26 13:13:29,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:13:49,786 INFO L124 PetriNetUnfolderBase]: 15227/27542 cut-off events. [2023-08-26 13:13:49,787 INFO L125 PetriNetUnfolderBase]: For 1155542/1155542 co-relation queries the response was YES. [2023-08-26 13:13:50,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 306542 conditions, 27542 events. 15227/27542 cut-off events. For 1155542/1155542 co-relation queries the response was YES. Maximal size of possible extension queue 1845. Compared 249999 event pairs, 538 based on Foata normal form. 350/27892 useless extension candidates. Maximal degree in co-relation 306411. Up to 10224 conditions per place. [2023-08-26 13:13:50,485 INFO L140 encePairwiseOnDemand]: 242/248 looper letters, 2618 selfloop transitions, 1146 changer transitions 43/3807 dead transitions. [2023-08-26 13:13:50,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 3807 transitions, 123376 flow [2023-08-26 13:13:50,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-26 13:13:50,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-26 13:13:50,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1312 transitions. [2023-08-26 13:13:50,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44086021505376344 [2023-08-26 13:13:50,487 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1312 transitions. [2023-08-26 13:13:50,487 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1312 transitions. [2023-08-26 13:13:50,505 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:13:50,505 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1312 transitions. [2023-08-26 13:13:50,507 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 109.33333333333333) internal successors, (1312), 12 states have internal predecessors, (1312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:13:50,508 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 248.0) internal successors, (3224), 13 states have internal predecessors, (3224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:13:50,508 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 248.0) internal successors, (3224), 13 states have internal predecessors, (3224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:13:50,508 INFO L175 Difference]: Start difference. First operand has 381 places, 2829 transitions, 90409 flow. Second operand 12 states and 1312 transitions. [2023-08-26 13:13:50,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 3807 transitions, 123376 flow [2023-08-26 13:14:13,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 3807 transitions, 119978 flow, removed 1667 selfloop flow, removed 13 redundant places. [2023-08-26 13:14:13,367 INFO L231 Difference]: Finished difference. Result has 386 places, 3128 transitions, 100381 flow [2023-08-26 13:14:13,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=85291, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2768, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=789, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1706, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=100381, PETRI_PLACES=386, PETRI_TRANSITIONS=3128} [2023-08-26 13:14:13,369 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 359 predicate places. [2023-08-26 13:14:13,369 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 3128 transitions, 100381 flow [2023-08-26 13:14:13,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 105.22222222222223) internal successors, (947), 9 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) [2023-08-26 13:14:13,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:14:13,370 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:14:13,389 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-08-26 13:14:13,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-08-26 13:14:13,570 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:14:13,570 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:14:13,571 INFO L85 PathProgramCache]: Analyzing trace with hash 1157202780, now seen corresponding path program 15 times [2023-08-26 13:14:13,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:14:13,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233787930] [2023-08-26 13:14:13,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:14:13,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:14:13,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:14:13,611 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 13:14:13,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:14:13,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233787930] [2023-08-26 13:14:13,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233787930] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:14:13,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750522736] [2023-08-26 13:14:13,612 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-26 13:14:13,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:14:13,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:14:13,613 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) [2023-08-26 13:14:13,614 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-26 13:14:13,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-26 13:14:13,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:14:13,679 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-26 13:14:13,679 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:14:13,725 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 13:14:13,725 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:14:13,742 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 13:14:13,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750522736] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:14:13,742 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:14:13,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2023-08-26 13:14:13,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989669542] [2023-08-26 13:14:13,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:14:13,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-26 13:14:13,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:14:13,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-26 13:14:13,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2023-08-26 13:14:13,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 248 [2023-08-26 13:14:13,744 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 3128 transitions, 100381 flow. Second operand has 10 states, 10 states have (on average 104.9) internal successors, (1049), 10 states have internal predecessors, (1049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:14:13,744 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:14:13,744 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 248 [2023-08-26 13:14:13,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:14:35,093 INFO L124 PetriNetUnfolderBase]: 14483/25976 cut-off events. [2023-08-26 13:14:35,093 INFO L125 PetriNetUnfolderBase]: For 1210285/1210285 co-relation queries the response was YES. [2023-08-26 13:14:35,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 298834 conditions, 25976 events. 14483/25976 cut-off events. For 1210285/1210285 co-relation queries the response was YES. Maximal size of possible extension queue 1704. Compared 231579 event pairs, 564 based on Foata normal form. 188/26164 useless extension candidates. Maximal degree in co-relation 298697. Up to 10224 conditions per place. [2023-08-26 13:14:35,937 INFO L140 encePairwiseOnDemand]: 242/248 looper letters, 2460 selfloop transitions, 1011 changer transitions 121/3592 dead transitions. [2023-08-26 13:14:35,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 3592 transitions, 114168 flow [2023-08-26 13:14:35,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-26 13:14:35,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-26 13:14:35,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1305 transitions. [2023-08-26 13:14:35,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43850806451612906 [2023-08-26 13:14:35,939 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1305 transitions. [2023-08-26 13:14:35,939 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1305 transitions. [2023-08-26 13:14:35,939 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:14:35,939 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1305 transitions. [2023-08-26 13:14:35,940 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 108.75) internal successors, (1305), 12 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:14:35,942 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 248.0) internal successors, (3224), 13 states have internal predecessors, (3224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:14:35,942 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 248.0) internal successors, (3224), 13 states have internal predecessors, (3224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:14:35,942 INFO L175 Difference]: Start difference. First operand has 386 places, 3128 transitions, 100381 flow. Second operand 12 states and 1305 transitions. [2023-08-26 13:14:35,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 3592 transitions, 114168 flow [2023-08-26 13:14:59,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 3592 transitions, 112632 flow, removed 588 selfloop flow, removed 5 redundant places. [2023-08-26 13:14:59,906 INFO L231 Difference]: Finished difference. Result has 396 places, 2899 transitions, 93101 flow [2023-08-26 13:14:59,907 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=93816, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3002, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1002, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1992, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=93101, PETRI_PLACES=396, PETRI_TRANSITIONS=2899} [2023-08-26 13:14:59,907 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 369 predicate places. [2023-08-26 13:14:59,908 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 2899 transitions, 93101 flow [2023-08-26 13:14:59,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 104.9) internal successors, (1049), 10 states have internal predecessors, (1049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:14:59,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:14:59,957 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:14:59,961 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-08-26 13:15:00,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:15:00,158 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:15:00,158 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:15:00,158 INFO L85 PathProgramCache]: Analyzing trace with hash -1673813480, now seen corresponding path program 16 times [2023-08-26 13:15:00,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:15:00,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092844834] [2023-08-26 13:15:00,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:15:00,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:15:00,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:15:00,190 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 13:15:00,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:15:00,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092844834] [2023-08-26 13:15:00,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092844834] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:15:00,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008935173] [2023-08-26 13:15:00,191 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-26 13:15:00,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:15:00,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:15:00,192 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) [2023-08-26 13:15:00,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-26 13:15:00,261 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-26 13:15:00,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:15:00,262 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-26 13:15:00,263 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:15:00,312 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:15:00,312 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:15:00,331 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 13:15:00,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008935173] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:15:00,331 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:15:00,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 8 [2023-08-26 13:15:00,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802723340] [2023-08-26 13:15:00,331 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:15:00,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-26 13:15:00,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:15:00,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-26 13:15:00,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-08-26 13:15:00,332 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 248 [2023-08-26 13:15:00,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 2899 transitions, 93101 flow. Second operand has 9 states, 9 states have (on average 105.33333333333333) internal successors, (948), 9 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:15:00,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:15:00,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 248 [2023-08-26 13:15:00,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:15:17,716 INFO L124 PetriNetUnfolderBase]: 13387/23848 cut-off events. [2023-08-26 13:15:17,716 INFO L125 PetriNetUnfolderBase]: For 1140127/1140127 co-relation queries the response was YES. [2023-08-26 13:15:17,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 277595 conditions, 23848 events. 13387/23848 cut-off events. For 1140127/1140127 co-relation queries the response was YES. Maximal size of possible extension queue 1544. Compared 206791 event pairs, 1012 based on Foata normal form. 722/24570 useless extension candidates. Maximal degree in co-relation 277454. Up to 14580 conditions per place. [2023-08-26 13:15:18,207 INFO L140 encePairwiseOnDemand]: 243/248 looper letters, 2137 selfloop transitions, 1132 changer transitions 0/3269 dead transitions. [2023-08-26 13:15:18,208 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 3269 transitions, 108676 flow [2023-08-26 13:15:18,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-26 13:15:18,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-26 13:15:18,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1206 transitions. [2023-08-26 13:15:18,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44208211143695014 [2023-08-26 13:15:18,209 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1206 transitions. [2023-08-26 13:15:18,209 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1206 transitions. [2023-08-26 13:15:18,209 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:15:18,209 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1206 transitions. [2023-08-26 13:15:18,210 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 109.63636363636364) internal successors, (1206), 11 states have internal predecessors, (1206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:15:18,211 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 248.0) internal successors, (2976), 12 states have internal predecessors, (2976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:15:18,212 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 248.0) internal successors, (2976), 12 states have internal predecessors, (2976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:15:18,212 INFO L175 Difference]: Start difference. First operand has 396 places, 2899 transitions, 93101 flow. Second operand 11 states and 1206 transitions. [2023-08-26 13:15:18,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 3269 transitions, 108676 flow [2023-08-26 13:15:39,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 3269 transitions, 106010 flow, removed 731 selfloop flow, removed 7 redundant places. [2023-08-26 13:15:39,332 INFO L231 Difference]: Finished difference. Result has 402 places, 2948 transitions, 96307 flow [2023-08-26 13:15:39,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=89437, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2866, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1053, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1762, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=96307, PETRI_PLACES=402, PETRI_TRANSITIONS=2948} [2023-08-26 13:15:39,334 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 375 predicate places. [2023-08-26 13:15:39,334 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 2948 transitions, 96307 flow [2023-08-26 13:15:39,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 105.33333333333333) internal successors, (948), 9 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:15:39,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:15:39,334 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:15:39,344 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-08-26 13:15:39,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-08-26 13:15:39,538 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:15:39,539 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:15:39,539 INFO L85 PathProgramCache]: Analyzing trace with hash -1114776146, now seen corresponding path program 17 times [2023-08-26 13:15:39,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:15:39,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358509719] [2023-08-26 13:15:39,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:15:39,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:15:39,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:15:39,610 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 13:15:39,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:15:39,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358509719] [2023-08-26 13:15:39,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358509719] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:15:39,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:15:39,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 13:15:39,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951979145] [2023-08-26 13:15:39,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:15:39,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 13:15:39,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:15:39,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 13:15:39,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-26 13:15:39,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 248 [2023-08-26 13:15:39,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 2948 transitions, 96307 flow. Second operand has 5 states, 5 states have (on average 109.6) internal successors, (548), 5 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) [2023-08-26 13:15:39,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:15:39,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 248 [2023-08-26 13:15:39,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:15:51,810 INFO L124 PetriNetUnfolderBase]: 8467/15591 cut-off events. [2023-08-26 13:15:51,810 INFO L125 PetriNetUnfolderBase]: For 702390/702390 co-relation queries the response was YES. [2023-08-26 13:15:51,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 184276 conditions, 15591 events. 8467/15591 cut-off events. For 702390/702390 co-relation queries the response was YES. Maximal size of possible extension queue 986. Compared 132167 event pairs, 1898 based on Foata normal form. 810/16401 useless extension candidates. Maximal degree in co-relation 184134. Up to 8187 conditions per place. [2023-08-26 13:15:52,010 INFO L140 encePairwiseOnDemand]: 245/248 looper letters, 1675 selfloop transitions, 346 changer transitions 352/2373 dead transitions. [2023-08-26 13:15:52,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 2373 transitions, 82205 flow [2023-08-26 13:15:52,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 13:15:52,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 13:15:52,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 457 transitions. [2023-08-26 13:15:52,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46068548387096775 [2023-08-26 13:15:52,011 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 457 transitions. [2023-08-26 13:15:52,011 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 457 transitions. [2023-08-26 13:15:52,012 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:15:52,012 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 457 transitions. [2023-08-26 13:15:52,012 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 114.25) internal successors, (457), 4 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:15:52,013 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 248.0) internal successors, (1240), 5 states have internal predecessors, (1240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:15:52,013 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 248.0) internal successors, (1240), 5 states have internal predecessors, (1240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:15:52,013 INFO L175 Difference]: Start difference. First operand has 402 places, 2948 transitions, 96307 flow. Second operand 4 states and 457 transitions. [2023-08-26 13:15:52,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 2373 transitions, 82205 flow [2023-08-26 13:16:02,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 2373 transitions, 80181 flow, removed 848 selfloop flow, removed 14 redundant places. [2023-08-26 13:16:02,575 INFO L231 Difference]: Finished difference. Result has 387 places, 1882 transitions, 59556 flow [2023-08-26 13:16:02,576 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=69950, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=344, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1843, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=59556, PETRI_PLACES=387, PETRI_TRANSITIONS=1882} [2023-08-26 13:16:02,576 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 360 predicate places. [2023-08-26 13:16:02,576 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 1882 transitions, 59556 flow [2023-08-26 13:16:02,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 109.6) internal successors, (548), 5 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) [2023-08-26 13:16:02,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:16:02,577 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:16:02,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2023-08-26 13:16:02,577 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:16:02,577 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:16:02,577 INFO L85 PathProgramCache]: Analyzing trace with hash -1785432374, now seen corresponding path program 4 times [2023-08-26 13:16:02,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:16:02,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566467046] [2023-08-26 13:16:02,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:16:02,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:16:02,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:16:02,640 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:16:02,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:16:02,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566467046] [2023-08-26 13:16:02,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566467046] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:16:02,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885046183] [2023-08-26 13:16:02,640 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-26 13:16:02,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:16:02,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:16:02,658 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) [2023-08-26 13:16:02,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-08-26 13:16:02,718 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-26 13:16:02,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:16:02,718 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-26 13:16:02,719 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:16:02,770 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:16:02,770 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:16:02,807 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 13:16:02,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885046183] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:16:02,807 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:16:02,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5] total 11 [2023-08-26 13:16:02,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061001994] [2023-08-26 13:16:02,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:16:02,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-26 13:16:02,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:16:02,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-26 13:16:02,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-08-26 13:16:02,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 248 [2023-08-26 13:16:02,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 1882 transitions, 59556 flow. Second operand has 12 states, 12 states have (on average 104.75) internal successors, (1257), 12 states have internal predecessors, (1257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:16:02,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:16:02,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 248 [2023-08-26 13:16:02,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:16:13,158 INFO L124 PetriNetUnfolderBase]: 9772/17998 cut-off events. [2023-08-26 13:16:13,158 INFO L125 PetriNetUnfolderBase]: For 880935/880935 co-relation queries the response was YES. [2023-08-26 13:16:13,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 214452 conditions, 17998 events. 9772/17998 cut-off events. For 880935/880935 co-relation queries the response was YES. Maximal size of possible extension queue 1030. Compared 152655 event pairs, 882 based on Foata normal form. 272/18270 useless extension candidates. Maximal degree in co-relation 214316. Up to 4447 conditions per place. [2023-08-26 13:16:13,399 INFO L140 encePairwiseOnDemand]: 242/248 looper letters, 1335 selfloop transitions, 1447 changer transitions 2/2784 dead transitions. [2023-08-26 13:16:13,399 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 2784 transitions, 91078 flow [2023-08-26 13:16:13,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-26 13:16:13,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-26 13:16:13,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2507 transitions. [2023-08-26 13:16:13,404 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43951612903225806 [2023-08-26 13:16:13,404 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2507 transitions. [2023-08-26 13:16:13,404 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2507 transitions. [2023-08-26 13:16:13,404 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:16:13,404 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2507 transitions. [2023-08-26 13:16:13,406 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 109.0) internal successors, (2507), 23 states have internal predecessors, (2507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:16:13,408 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 248.0) internal successors, (5952), 24 states have internal predecessors, (5952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:16:13,409 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 248.0) internal successors, (5952), 24 states have internal predecessors, (5952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:16:13,409 INFO L175 Difference]: Start difference. First operand has 387 places, 1882 transitions, 59556 flow. Second operand 23 states and 2507 transitions. [2023-08-26 13:16:13,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 2784 transitions, 91078 flow [2023-08-26 13:16:25,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 2784 transitions, 88900 flow, removed 302 selfloop flow, removed 4 redundant places. [2023-08-26 13:16:25,493 INFO L231 Difference]: Finished difference. Result has 413 places, 2352 transitions, 80298 flow [2023-08-26 13:16:25,495 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=58065, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1881, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1033, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=740, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=80298, PETRI_PLACES=413, PETRI_TRANSITIONS=2352} [2023-08-26 13:16:25,495 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 386 predicate places. [2023-08-26 13:16:25,495 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 2352 transitions, 80298 flow [2023-08-26 13:16:25,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 104.75) internal successors, (1257), 12 states have internal predecessors, (1257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:16:25,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:16:25,495 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:16:25,504 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-08-26 13:16:25,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:16:25,700 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:16:25,700 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:16:25,700 INFO L85 PathProgramCache]: Analyzing trace with hash 789555168, now seen corresponding path program 5 times [2023-08-26 13:16:25,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:16:25,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381298844] [2023-08-26 13:16:25,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:16:25,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:16:25,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:16:25,809 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:16:25,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:16:25,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381298844] [2023-08-26 13:16:25,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381298844] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:16:25,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059110477] [2023-08-26 13:16:25,810 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-26 13:16:25,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:16:25,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:16:25,811 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) [2023-08-26 13:16:25,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-08-26 13:16:25,896 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-26 13:16:25,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:16:25,897 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-26 13:16:25,898 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:16:25,951 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:16:25,952 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:16:26,007 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 13:16:26,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059110477] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:16:26,007 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:16:26,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5] total 11 [2023-08-26 13:16:26,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681606515] [2023-08-26 13:16:26,007 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:16:26,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-26 13:16:26,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:16:26,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-26 13:16:26,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-08-26 13:16:26,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 248 [2023-08-26 13:16:26,010 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 2352 transitions, 80298 flow. Second operand has 12 states, 12 states have (on average 104.83333333333333) internal successors, (1258), 12 states have internal predecessors, (1258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:16:26,010 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:16:26,010 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 248 [2023-08-26 13:16:26,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:16:39,355 INFO L124 PetriNetUnfolderBase]: 9403/17446 cut-off events. [2023-08-26 13:16:39,355 INFO L125 PetriNetUnfolderBase]: For 952060/952060 co-relation queries the response was YES. [2023-08-26 13:16:39,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 216882 conditions, 17446 events. 9403/17446 cut-off events. For 952060/952060 co-relation queries the response was YES. Maximal size of possible extension queue 1013. Compared 149586 event pairs, 186 based on Foata normal form. 192/17638 useless extension candidates. Maximal degree in co-relation 216736. Up to 4029 conditions per place. [2023-08-26 13:16:39,597 INFO L140 encePairwiseOnDemand]: 242/248 looper letters, 1857 selfloop transitions, 1066 changer transitions 0/2923 dead transitions. [2023-08-26 13:16:39,598 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 2923 transitions, 96284 flow [2023-08-26 13:16:39,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-26 13:16:39,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-26 13:16:39,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 2704 transitions. [2023-08-26 13:16:39,600 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43612903225806454 [2023-08-26 13:16:39,600 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 2704 transitions. [2023-08-26 13:16:39,600 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 2704 transitions. [2023-08-26 13:16:39,600 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:16:39,600 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 2704 transitions. [2023-08-26 13:16:39,602 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 108.16) internal successors, (2704), 25 states have internal predecessors, (2704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:16:39,605 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 248.0) internal successors, (6448), 26 states have internal predecessors, (6448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:16:39,605 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 248.0) internal successors, (6448), 26 states have internal predecessors, (6448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:16:39,605 INFO L175 Difference]: Start difference. First operand has 413 places, 2352 transitions, 80298 flow. Second operand 25 states and 2704 transitions. [2023-08-26 13:16:39,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 2923 transitions, 96284 flow [2023-08-26 13:16:53,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 2923 transitions, 95161 flow, removed 504 selfloop flow, removed 4 redundant places. [2023-08-26 13:16:53,814 INFO L231 Difference]: Finished difference. Result has 437 places, 2344 transitions, 81932 flow [2023-08-26 13:16:53,816 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=77451, PETRI_DIFFERENCE_MINUEND_PLACES=409, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1035, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=81932, PETRI_PLACES=437, PETRI_TRANSITIONS=2344} [2023-08-26 13:16:53,816 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 410 predicate places. [2023-08-26 13:16:53,816 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 2344 transitions, 81932 flow [2023-08-26 13:16:53,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 104.83333333333333) internal successors, (1258), 12 states have internal predecessors, (1258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:16:53,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:16:53,817 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:16:53,821 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-08-26 13:16:54,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:16:54,021 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:16:54,021 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:16:54,021 INFO L85 PathProgramCache]: Analyzing trace with hash 1819053340, now seen corresponding path program 18 times [2023-08-26 13:16:54,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:16:54,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848792420] [2023-08-26 13:16:54,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:16:54,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:16:54,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:16:54,293 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:16:54,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:16:54,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848792420] [2023-08-26 13:16:54,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848792420] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:16:54,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238710969] [2023-08-26 13:16:54,294 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-26 13:16:54,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:16:54,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:16:54,297 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) [2023-08-26 13:16:54,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-08-26 13:16:54,385 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-26 13:16:54,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:16:54,386 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-26 13:16:54,387 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:16:54,640 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:16:54,640 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:17:27,039 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:17:27,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238710969] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:17:27,039 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:17:27,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 6] total 20 [2023-08-26 13:17:27,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247618573] [2023-08-26 13:17:27,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:17:27,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-26 13:17:27,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:17:27,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-26 13:17:27,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=374, Unknown=15, NotChecked=0, Total=462 [2023-08-26 13:17:27,041 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 248 [2023-08-26 13:17:27,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 2344 transitions, 81932 flow. Second operand has 22 states, 22 states have (on average 87.4090909090909) internal successors, (1923), 22 states have internal predecessors, (1923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:17:27,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:17:27,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 248 [2023-08-26 13:17:27,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:17:29,637 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (* 4294967296 (div (+ 2 c_~k1~0) 4294967296))) (.cse2 (+ c_~j1~0 1)) (.cse5 (* 4294967296 (div c_~k2~0 4294967296))) (.cse4 (+ c_~k2~0 (* 4294967296 (div c_~k1~0 4294967296))))) (and (forall ((~m~0 Int)) (or (<= ~m~0 c_~j1~0) (let ((.cse0 (* 2 ~m~0))) (<= (+ 2 c_~k1~0 (* (div (+ c_~k2~0 .cse0) 4294967296) 4294967296)) (+ c_~k2~0 .cse0 .cse1))) (< .cse2 ~m~0))) (forall ((~m~0 Int)) (or (let ((.cse3 (* 2 ~m~0))) (< (+ c_~k2~0 .cse3 .cse1) (+ 3 c_~k1~0 (* (div (+ c_~k2~0 .cse3) 4294967296) 4294967296)))) (<= ~m~0 c_~j1~0) (< .cse2 ~m~0))) (< .cse4 (+ .cse5 c_~k1~0 1)) (<= (+ .cse5 c_~k1~0) .cse4))) is different from false [2023-08-26 13:17:35,187 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (* 4294967296 (div (+ 2 c_~k1~0) 4294967296))) (.cse2 (+ c_~j1~0 1))) (and (exists ((~m~0 Int)) (and (<= ~m~0 1) (< 0 ~m~0) (= (mod (+ c_~k2~0 (* 4294967294 ~m~0)) 4294967296) 0))) (forall ((~m~0 Int)) (or (<= ~m~0 c_~j1~0) (let ((.cse0 (* 2 ~m~0))) (<= (+ 2 c_~k1~0 (* (div (+ c_~k2~0 .cse0) 4294967296) 4294967296)) (+ c_~k2~0 .cse0 .cse1))) (< .cse2 ~m~0))) (forall ((~m~0 Int)) (or (let ((.cse3 (* 2 ~m~0))) (< (+ c_~k2~0 .cse3 .cse1) (+ 3 c_~k1~0 (* (div (+ c_~k2~0 .cse3) 4294967296) 4294967296)))) (<= ~m~0 c_~j1~0) (< .cse2 ~m~0))) (= (mod (+ 4294967294 c_~k1~0) 4294967296) 0))) is different from false [2023-08-26 13:17:47,532 INFO L124 PetriNetUnfolderBase]: 10115/18820 cut-off events. [2023-08-26 13:17:47,534 INFO L125 PetriNetUnfolderBase]: For 1089235/1089235 co-relation queries the response was YES. [2023-08-26 13:17:47,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 242752 conditions, 18820 events. 10115/18820 cut-off events. For 1089235/1089235 co-relation queries the response was YES. Maximal size of possible extension queue 1103. Compared 163520 event pairs, 806 based on Foata normal form. 18/18838 useless extension candidates. Maximal degree in co-relation 242601. Up to 17634 conditions per place. [2023-08-26 13:17:47,992 INFO L140 encePairwiseOnDemand]: 240/248 looper letters, 2468 selfloop transitions, 170 changer transitions 19/2657 dead transitions. [2023-08-26 13:17:47,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 454 places, 2657 transitions, 96994 flow [2023-08-26 13:17:47,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-26 13:17:47,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-26 13:17:47,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1661 transitions. [2023-08-26 13:17:47,994 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3720878136200717 [2023-08-26 13:17:47,994 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1661 transitions. [2023-08-26 13:17:47,994 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1661 transitions. [2023-08-26 13:17:47,995 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:17:47,995 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1661 transitions. [2023-08-26 13:17:47,996 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 92.27777777777777) internal successors, (1661), 18 states have internal predecessors, (1661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:17:47,999 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 248.0) internal successors, (4712), 19 states have internal predecessors, (4712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:17:47,999 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 248.0) internal successors, (4712), 19 states have internal predecessors, (4712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:17:47,999 INFO L175 Difference]: Start difference. First operand has 437 places, 2344 transitions, 81932 flow. Second operand 18 states and 1661 transitions. [2023-08-26 13:17:47,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 454 places, 2657 transitions, 96994 flow [2023-08-26 13:18:09,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 2657 transitions, 95103 flow, removed 665 selfloop flow, removed 8 redundant places. [2023-08-26 13:18:09,575 INFO L231 Difference]: Finished difference. Result has 457 places, 2491 transitions, 86014 flow [2023-08-26 13:18:09,577 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=80127, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=86014, PETRI_PLACES=457, PETRI_TRANSITIONS=2491} [2023-08-26 13:18:09,577 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 430 predicate places. [2023-08-26 13:18:09,577 INFO L495 AbstractCegarLoop]: Abstraction has has 457 places, 2491 transitions, 86014 flow [2023-08-26 13:18:09,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 87.4090909090909) internal successors, (1923), 22 states have internal predecessors, (1923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:18:09,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:18:09,577 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:18:09,583 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-08-26 13:18:09,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:18:09,781 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:18:09,781 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:18:09,782 INFO L85 PathProgramCache]: Analyzing trace with hash -1150653092, now seen corresponding path program 19 times [2023-08-26 13:18:09,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:18:09,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18389902] [2023-08-26 13:18:09,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:18:09,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:18:09,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:18:10,073 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:18:10,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:18:10,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18389902] [2023-08-26 13:18:10,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18389902] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:18:10,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379803910] [2023-08-26 13:18:10,074 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-26 13:18:10,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:18:10,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:18:10,074 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) [2023-08-26 13:18:10,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-08-26 13:18:10,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:18:10,406 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-26 13:18:10,407 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:18:10,657 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:18:10,657 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:18:10,941 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:18:10,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379803910] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:18:10,941 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:18:10,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 6] total 20 [2023-08-26 13:18:10,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482515697] [2023-08-26 13:18:10,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:18:10,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-26 13:18:10,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:18:10,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-26 13:18:10,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2023-08-26 13:18:10,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 248 [2023-08-26 13:18:10,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 457 places, 2491 transitions, 86014 flow. Second operand has 22 states, 22 states have (on average 87.45454545454545) internal successors, (1924), 22 states have internal predecessors, (1924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:18:10,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:18:10,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 248 [2023-08-26 13:18:10,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:18:20,476 WARN L234 SmtUtils]: Spent 8.15s on a formula simplification. DAG size of input: 42 DAG size of output: 35 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-26 13:18:23,026 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] [2023-08-26 13:18:26,439 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-26 13:18:33,010 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-26 13:18:34,773 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0, 1] [2023-08-26 13:18:36,887 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-26 13:18:48,497 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-26 13:18:59,281 INFO L124 PetriNetUnfolderBase]: 10791/20096 cut-off events. [2023-08-26 13:18:59,281 INFO L125 PetriNetUnfolderBase]: For 1104309/1104309 co-relation queries the response was YES. [2023-08-26 13:18:59,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 259972 conditions, 20096 events. 10791/20096 cut-off events. For 1104309/1104309 co-relation queries the response was YES. Maximal size of possible extension queue 1176. Compared 175772 event pairs, 900 based on Foata normal form. 18/20114 useless extension candidates. Maximal degree in co-relation 259812. Up to 18950 conditions per place. [2023-08-26 13:18:59,614 INFO L140 encePairwiseOnDemand]: 242/248 looper letters, 2612 selfloop transitions, 176 changer transitions 24/2812 dead transitions. [2023-08-26 13:18:59,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 478 places, 2812 transitions, 102092 flow [2023-08-26 13:18:59,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-26 13:18:59,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-26 13:18:59,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2023 transitions. [2023-08-26 13:18:59,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37078445747800587 [2023-08-26 13:18:59,616 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2023 transitions. [2023-08-26 13:18:59,616 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2023 transitions. [2023-08-26 13:18:59,616 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:18:59,616 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2023 transitions. [2023-08-26 13:18:59,618 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 91.95454545454545) internal successors, (2023), 22 states have internal predecessors, (2023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:18:59,620 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 248.0) internal successors, (5704), 23 states have internal predecessors, (5704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:18:59,620 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 248.0) internal successors, (5704), 23 states have internal predecessors, (5704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:18:59,620 INFO L175 Difference]: Start difference. First operand has 457 places, 2491 transitions, 86014 flow. Second operand 22 states and 2023 transitions. [2023-08-26 13:18:59,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 478 places, 2812 transitions, 102092 flow [2023-08-26 13:19:17,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 474 places, 2812 transitions, 101283 flow, removed 398 selfloop flow, removed 4 redundant places. [2023-08-26 13:19:17,754 INFO L231 Difference]: Finished difference. Result has 481 places, 2642 transitions, 91409 flow [2023-08-26 13:19:17,755 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=85205, PETRI_DIFFERENCE_MINUEND_PLACES=453, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2491, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=91409, PETRI_PLACES=481, PETRI_TRANSITIONS=2642} [2023-08-26 13:19:17,756 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 454 predicate places. [2023-08-26 13:19:17,756 INFO L495 AbstractCegarLoop]: Abstraction has has 481 places, 2642 transitions, 91409 flow [2023-08-26 13:19:17,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 87.45454545454545) internal successors, (1924), 22 states have internal predecessors, (1924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:19:17,756 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:19:17,756 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:19:17,760 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-08-26 13:19:17,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:19:17,961 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:19:17,961 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:19:17,961 INFO L85 PathProgramCache]: Analyzing trace with hash 1918578436, now seen corresponding path program 20 times [2023-08-26 13:19:17,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:19:17,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540601610] [2023-08-26 13:19:17,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:19:17,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:19:17,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:19:18,224 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:19:18,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:19:18,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540601610] [2023-08-26 13:19:18,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540601610] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:19:18,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666907087] [2023-08-26 13:19:18,225 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 13:19:18,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:19:18,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:19:18,229 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) [2023-08-26 13:19:18,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-08-26 13:19:18,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 13:19:18,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:19:18,343 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-26 13:19:18,344 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:19:18,596 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:19:18,596 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:19:22,908 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse2 (* 4294967296 (div (+ 2 c_~k1~0) 4294967296))) (.cse0 (+ c_~j1~0 1))) (and (forall ((~m~0 Int)) (or (<= ~m~0 c_~j1~0) (< .cse0 ~m~0) (let ((.cse1 (* 2 ~m~0))) (< (+ c_~k1~0 (* (div (+ c_~k2~0 .cse1) 4294967296) 4294967296) 1) (+ c_~k2~0 .cse1 .cse2))))) (forall ((~m~0 Int)) (or (let ((.cse3 (* 2 ~m~0))) (<= (+ c_~k2~0 .cse3 .cse2) (+ 2 c_~k1~0 (* (div (+ c_~k2~0 .cse3) 4294967296) 4294967296)))) (<= ~m~0 c_~j1~0) (< .cse0 ~m~0))))) is different from false [2023-08-26 13:19:23,213 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 3 not checked. [2023-08-26 13:19:23,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666907087] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:19:23,213 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:19:23,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 6] total 20 [2023-08-26 13:19:23,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950903817] [2023-08-26 13:19:23,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:19:23,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-26 13:19:23,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:19:23,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-26 13:19:23,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=354, Unknown=2, NotChecked=38, Total=462 [2023-08-26 13:19:23,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 248 [2023-08-26 13:19:23,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 481 places, 2642 transitions, 91409 flow. Second operand has 22 states, 22 states have (on average 87.27272727272727) internal successors, (1920), 22 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:19:23,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:19:23,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 248 [2023-08-26 13:19:23,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:19:36,536 WARN L234 SmtUtils]: Spent 13.25s on a formula simplification. DAG size of input: 45 DAG size of output: 23 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-26 13:19:38,959 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse5 (* 4294967296 (div (+ 2 c_~k1~0) 4294967296))) (.cse3 (+ c_~j1~0 1))) (and (or (let ((.cse2 (* c_~m~0 2))) (let ((.cse1 (+ c_~k2~0 .cse2 (* (div (+ c_~k1~0 1) 4294967296) 4294967296))) (.cse0 (* (div (+ c_~k2~0 .cse2) 4294967296) 4294967296))) (and (< (+ .cse0 c_~k1~0) .cse1) (<= .cse1 (+ .cse0 c_~k1~0 1))))) (< c_~j1~0 c_~m~0)) (forall ((~m~0 Int)) (or (<= ~m~0 c_~j1~0) (< .cse3 ~m~0) (let ((.cse4 (* 2 ~m~0))) (< (+ c_~k1~0 (* (div (+ c_~k2~0 .cse4) 4294967296) 4294967296) 1) (+ c_~k2~0 .cse4 .cse5))))) (forall ((~m~0 Int)) (or (let ((.cse6 (* 2 ~m~0))) (<= (+ c_~k2~0 .cse6 .cse5) (+ 2 c_~k1~0 (* (div (+ c_~k2~0 .cse6) 4294967296) 4294967296)))) (<= ~m~0 c_~j1~0) (< .cse3 ~m~0))) (< 0 c_~m~0) (<= c_~m~0 1) (= (mod (+ (* c_~m~0 4294967295) c_~k2~0) 4294967296) 0) (= (mod (+ 4294967295 c_~k1~0) 4294967296) 0))) is different from false [2023-08-26 13:19:42,689 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse2 (* 4294967296 (div (+ 2 c_~k1~0) 4294967296))) (.cse0 (+ c_~j1~0 1))) (and (forall ((~m~0 Int)) (or (<= ~m~0 c_~j1~0) (< .cse0 ~m~0) (let ((.cse1 (* 2 ~m~0))) (< (+ c_~k1~0 (* (div (+ c_~k2~0 .cse1) 4294967296) 4294967296) 1) (+ c_~k2~0 .cse1 .cse2))))) (exists ((~m~0 Int)) (and (<= ~m~0 1) (< 0 ~m~0) (= (mod (+ c_~k2~0 (* 4294967294 ~m~0)) 4294967296) 0))) (forall ((~m~0 Int)) (or (let ((.cse3 (* 2 ~m~0))) (<= (+ c_~k2~0 .cse3 .cse2) (+ 2 c_~k1~0 (* (div (+ c_~k2~0 .cse3) 4294967296) 4294967296)))) (<= ~m~0 c_~j1~0) (< .cse0 ~m~0))) (= (mod (+ 4294967294 c_~k1~0) 4294967296) 0))) is different from false [2023-08-26 13:19:47,418 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse2 (* 4294967296 (div (+ 2 c_~k1~0) 4294967296))) (.cse0 (+ c_~j1~0 1)) (.cse5 (+ (* 4294967296 (div c_~k2~0 4294967296)) c_~k1~0)) (.cse4 (* 4294967296 (div c_~k1~0 4294967296)))) (and (forall ((~m~0 Int)) (or (<= ~m~0 c_~j1~0) (< .cse0 ~m~0) (let ((.cse1 (* 2 ~m~0))) (< (+ c_~k1~0 (* (div (+ c_~k2~0 .cse1) 4294967296) 4294967296) 1) (+ c_~k2~0 .cse1 .cse2))))) (forall ((~m~0 Int)) (or (let ((.cse3 (* 2 ~m~0))) (<= (+ c_~k2~0 .cse3 .cse2) (+ 2 c_~k1~0 (* (div (+ c_~k2~0 .cse3) 4294967296) 4294967296)))) (<= ~m~0 c_~j1~0) (< .cse0 ~m~0))) (<= (+ c_~k2~0 .cse4) .cse5) (< .cse5 (+ c_~k2~0 .cse4 1)))) is different from false [2023-08-26 13:20:00,454 INFO L124 PetriNetUnfolderBase]: 11178/20855 cut-off events. [2023-08-26 13:20:00,455 INFO L125 PetriNetUnfolderBase]: For 1187957/1187957 co-relation queries the response was YES. [2023-08-26 13:20:00,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 272771 conditions, 20855 events. 11178/20855 cut-off events. For 1187957/1187957 co-relation queries the response was YES. Maximal size of possible extension queue 1235. Compared 184031 event pairs, 939 based on Foata normal form. 9/20864 useless extension candidates. Maximal degree in co-relation 272603. Up to 20035 conditions per place. [2023-08-26 13:20:00,770 INFO L140 encePairwiseOnDemand]: 240/248 looper letters, 2713 selfloop transitions, 135 changer transitions 11/2859 dead transitions. [2023-08-26 13:20:00,770 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 497 places, 2859 transitions, 104275 flow [2023-08-26 13:20:00,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-26 13:20:00,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-26 13:20:00,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1562 transitions. [2023-08-26 13:20:00,772 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3704933586337761 [2023-08-26 13:20:00,772 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1562 transitions. [2023-08-26 13:20:00,772 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1562 transitions. [2023-08-26 13:20:00,773 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:20:00,773 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1562 transitions. [2023-08-26 13:20:00,774 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 91.88235294117646) internal successors, (1562), 17 states have internal predecessors, (1562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:20:00,775 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 248.0) internal successors, (4464), 18 states have internal predecessors, (4464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:20:00,776 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 248.0) internal successors, (4464), 18 states have internal predecessors, (4464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:20:00,776 INFO L175 Difference]: Start difference. First operand has 481 places, 2642 transitions, 91409 flow. Second operand 17 states and 1562 transitions. [2023-08-26 13:20:00,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 497 places, 2859 transitions, 104275 flow [2023-08-26 13:20:21,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 489 places, 2859 transitions, 102702 flow, removed 770 selfloop flow, removed 8 redundant places. [2023-08-26 13:20:21,113 INFO L231 Difference]: Finished difference. Result has 498 places, 2736 transitions, 93839 flow [2023-08-26 13:20:21,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=89968, PETRI_DIFFERENCE_MINUEND_PLACES=473, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2642, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2541, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=93839, PETRI_PLACES=498, PETRI_TRANSITIONS=2736} [2023-08-26 13:20:21,114 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 471 predicate places. [2023-08-26 13:20:21,114 INFO L495 AbstractCegarLoop]: Abstraction has has 498 places, 2736 transitions, 93839 flow [2023-08-26 13:20:21,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 87.27272727272727) internal successors, (1920), 22 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:20:21,115 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:20:21,115 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:20:21,121 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-08-26 13:20:21,319 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,SelfDestructingSolverStorable34 [2023-08-26 13:20:21,320 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:20:21,320 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:20:21,320 INFO L85 PathProgramCache]: Analyzing trace with hash 2093743937, now seen corresponding path program 21 times [2023-08-26 13:20:21,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:20:21,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731476949] [2023-08-26 13:20:21,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:20:21,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:20:21,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:20:21,604 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:20:21,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:20:21,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731476949] [2023-08-26 13:20:21,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731476949] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:20:21,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461117955] [2023-08-26 13:20:21,604 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-26 13:20:21,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:20:21,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:20:21,605 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) [2023-08-26 13:20:21,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-08-26 13:20:21,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-08-26 13:20:21,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:20:21,786 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-26 13:20:21,787 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:20:22,129 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:20:22,129 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:20:22,728 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:20:22,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461117955] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:20:22,728 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:20:22,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 26 [2023-08-26 13:20:22,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261360593] [2023-08-26 13:20:22,728 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:20:22,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-26 13:20:22,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:20:22,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-26 13:20:22,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=621, Unknown=0, NotChecked=0, Total=756 [2023-08-26 13:20:22,730 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 248 [2023-08-26 13:20:22,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 498 places, 2736 transitions, 93839 flow. Second operand has 28 states, 28 states have (on average 93.85714285714286) internal successors, (2628), 28 states have internal predecessors, (2628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:20:22,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:20:22,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 248 [2023-08-26 13:20:22,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:20:58,803 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-26 13:21:14,668 INFO L124 PetriNetUnfolderBase]: 12176/22528 cut-off events. [2023-08-26 13:21:14,668 INFO L125 PetriNetUnfolderBase]: For 1329275/1329275 co-relation queries the response was YES. [2023-08-26 13:21:14,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 303450 conditions, 22528 events. 12176/22528 cut-off events. For 1329275/1329275 co-relation queries the response was YES. Maximal size of possible extension queue 1297. Compared 199236 event pairs, 753 based on Foata normal form. 7/22535 useless extension candidates. Maximal degree in co-relation 303272. Up to 13806 conditions per place. [2023-08-26 13:21:15,045 INFO L140 encePairwiseOnDemand]: 242/248 looper letters, 1440 selfloop transitions, 1802 changer transitions 31/3273 dead transitions. [2023-08-26 13:21:15,046 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 549 places, 3273 transitions, 114781 flow [2023-08-26 13:21:15,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-08-26 13:21:15,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2023-08-26 13:21:15,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 5088 transitions. [2023-08-26 13:21:15,060 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3945409429280397 [2023-08-26 13:21:15,060 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 5088 transitions. [2023-08-26 13:21:15,060 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 5088 transitions. [2023-08-26 13:21:15,061 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:21:15,061 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 5088 transitions. [2023-08-26 13:21:15,065 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 97.84615384615384) internal successors, (5088), 52 states have internal predecessors, (5088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:21:15,070 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 248.0) internal successors, (13144), 53 states have internal predecessors, (13144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:21:15,071 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 248.0) internal successors, (13144), 53 states have internal predecessors, (13144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:21:15,071 INFO L175 Difference]: Start difference. First operand has 498 places, 2736 transitions, 93839 flow. Second operand 52 states and 5088 transitions. [2023-08-26 13:21:15,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 549 places, 3273 transitions, 114781 flow [2023-08-26 13:21:40,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 544 places, 3273 transitions, 113945 flow, removed 408 selfloop flow, removed 5 redundant places. [2023-08-26 13:21:40,340 INFO L231 Difference]: Finished difference. Result has 553 places, 3062 transitions, 110181 flow [2023-08-26 13:21:40,342 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=93003, PETRI_DIFFERENCE_MINUEND_PLACES=493, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2736, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1500, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=110181, PETRI_PLACES=553, PETRI_TRANSITIONS=3062} [2023-08-26 13:21:40,343 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 526 predicate places. [2023-08-26 13:21:40,343 INFO L495 AbstractCegarLoop]: Abstraction has has 553 places, 3062 transitions, 110181 flow [2023-08-26 13:21:40,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 93.85714285714286) internal successors, (2628), 28 states have internal predecessors, (2628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:21:40,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:21:40,343 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:21:40,349 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-08-26 13:21:40,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-08-26 13:21:40,548 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:21:40,548 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:21:40,549 INFO L85 PathProgramCache]: Analyzing trace with hash -1309091832, now seen corresponding path program 22 times [2023-08-26 13:21:40,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:21:40,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603152935] [2023-08-26 13:21:40,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:21:40,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:21:40,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:21:40,829 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:21:40,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:21:40,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603152935] [2023-08-26 13:21:40,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603152935] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:21:40,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946317748] [2023-08-26 13:21:40,829 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-26 13:21:40,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:21:40,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:21:40,834 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) [2023-08-26 13:21:40,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-08-26 13:21:41,329 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-26 13:21:41,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:21:41,330 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-26 13:21:41,331 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:21:41,677 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:21:41,677 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:22:22,632 WARN L234 SmtUtils]: Spent 6.23s on a formula simplification that was a NOOP. DAG size: 27 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-26 13:22:22,796 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 13:22:22,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946317748] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:22:22,796 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:22:22,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 6] total 20 [2023-08-26 13:22:22,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486374924] [2023-08-26 13:22:22,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:22:22,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-26 13:22:22,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:22:22,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-26 13:22:22,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=375, Unknown=17, NotChecked=0, Total=462 [2023-08-26 13:22:22,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 248 [2023-08-26 13:22:22,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 553 places, 3062 transitions, 110181 flow. Second operand has 22 states, 22 states have (on average 87.31818181818181) internal successors, (1921), 22 states have internal predecessors, (1921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:22:22,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:22:22,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 248 [2023-08-26 13:22:22,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:22:31,921 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse9 (* 4294967296 (div c_~k2~0 4294967296)))) (let ((.cse3 (* (div (+ c_~k1~0 1) 4294967296) 4294967296)) (.cse4 (< c_~j1~0 c_~m~0)) (.cse7 (* 4294967296 (div (+ 2 c_~k1~0) 4294967296))) (.cse5 (+ c_~j1~0 1)) (.cse10 (+ .cse9 c_~k1~0)) (.cse12 (* 4294967296 (div c_~k1~0 4294967296)))) (and (or (let ((.cse2 (* c_~m~0 2))) (let ((.cse1 (+ c_~k2~0 .cse2 .cse3)) (.cse0 (* (div (+ c_~k2~0 .cse2) 4294967296) 4294967296))) (and (< (+ .cse0 c_~k1~0) .cse1) (<= .cse1 (+ .cse0 c_~k1~0 1))))) .cse4) (forall ((~m~0 Int)) (or (<= ~m~0 c_~j1~0) (< .cse5 ~m~0) (let ((.cse6 (* 2 ~m~0))) (< (+ c_~k1~0 (* (div (+ c_~k2~0 .cse6) 4294967296) 4294967296) 1) (+ c_~k2~0 .cse6 .cse7))))) (or (let ((.cse8 (+ c_~k2~0 .cse3))) (and (<= .cse8 (+ .cse9 c_~k1~0 1)) (< .cse10 .cse8))) .cse4) (forall ((~m~0 Int)) (or (let ((.cse11 (* 2 ~m~0))) (<= (+ c_~k2~0 .cse11 .cse7) (+ 2 c_~k1~0 (* (div (+ c_~k2~0 .cse11) 4294967296) 4294967296)))) (<= ~m~0 c_~j1~0) (< .cse5 ~m~0))) (<= (+ c_~k2~0 (* c_~j1~0 2)) (+ (* (div (+ (* (- 1) c_~k1~0) 1) 4294967296) 4294967296) c_~m~0 (* 4294967296 (div (+ (- 2) c_~k2~0 c_~m~0) 4294967296)) c_~k1~0 1)) (<= (+ c_~k2~0 .cse12) .cse10) (< .cse10 (+ c_~k2~0 .cse12 1))))) is different from false [2023-08-26 13:22:44,854 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse2 (* 4294967296 (div (+ 2 c_~k1~0) 4294967296))) (.cse0 (+ c_~j1~0 1))) (and (forall ((~m~0 Int)) (or (<= ~m~0 c_~j1~0) (< .cse0 ~m~0) (let ((.cse1 (* 2 ~m~0))) (< (+ c_~k1~0 (* (div (+ c_~k2~0 .cse1) 4294967296) 4294967296) 1) (+ c_~k2~0 .cse1 .cse2))))) (exists ((~m~0 Int)) (and (<= ~m~0 1) (< 0 ~m~0) (= (mod (+ c_~k2~0 (* 4294967294 ~m~0)) 4294967296) 0))) (forall ((~m~0 Int)) (or (let ((.cse3 (* 2 ~m~0))) (<= (+ c_~k2~0 .cse3 .cse2) (+ 2 c_~k1~0 (* (div (+ c_~k2~0 .cse3) 4294967296) 4294967296)))) (<= ~m~0 c_~j1~0) (< .cse0 ~m~0))) (= (mod (+ 4294967294 c_~k1~0) 4294967296) 0))) is different from false [2023-08-26 13:22:54,739 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse2 (* 4294967296 (div (+ 2 c_~k1~0) 4294967296))) (.cse0 (+ c_~j1~0 1)) (.cse5 (+ (* 4294967296 (div c_~k2~0 4294967296)) c_~k1~0)) (.cse4 (* 4294967296 (div c_~k1~0 4294967296)))) (and (forall ((~m~0 Int)) (or (<= ~m~0 c_~j1~0) (< .cse0 ~m~0) (let ((.cse1 (* 2 ~m~0))) (< (+ c_~k1~0 (* (div (+ c_~k2~0 .cse1) 4294967296) 4294967296) 1) (+ c_~k2~0 .cse1 .cse2))))) (forall ((~m~0 Int)) (or (let ((.cse3 (* 2 ~m~0))) (<= (+ c_~k2~0 .cse3 .cse2) (+ 2 c_~k1~0 (* (div (+ c_~k2~0 .cse3) 4294967296) 4294967296)))) (<= ~m~0 c_~j1~0) (< .cse0 ~m~0))) (<= (+ c_~k2~0 .cse4) .cse5) (< .cse5 (+ c_~k2~0 .cse4 1)))) is different from false [2023-08-26 13:23:06,692 INFO L124 PetriNetUnfolderBase]: 12662/23465 cut-off events. [2023-08-26 13:23:06,692 INFO L125 PetriNetUnfolderBase]: For 1498212/1498212 co-relation queries the response was YES. [2023-08-26 13:23:07,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 326064 conditions, 23465 events. 12662/23465 cut-off events. For 1498212/1498212 co-relation queries the response was YES. Maximal size of possible extension queue 1341. Compared 209535 event pairs, 1020 based on Foata normal form. 9/23474 useless extension candidates. Maximal degree in co-relation 325876. Up to 22541 conditions per place. [2023-08-26 13:23:07,116 INFO L140 encePairwiseOnDemand]: 240/248 looper letters, 3163 selfloop transitions, 165 changer transitions 26/3354 dead transitions. [2023-08-26 13:23:07,117 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 575 places, 3354 transitions, 126048 flow [2023-08-26 13:23:07,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-26 13:23:07,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-26 13:23:07,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2108 transitions. [2023-08-26 13:23:07,119 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3695652173913043 [2023-08-26 13:23:07,119 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2108 transitions. [2023-08-26 13:23:07,119 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2108 transitions. [2023-08-26 13:23:07,119 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:23:07,119 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2108 transitions. [2023-08-26 13:23:07,121 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 91.65217391304348) internal successors, (2108), 23 states have internal predecessors, (2108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:07,124 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 248.0) internal successors, (5952), 24 states have internal predecessors, (5952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:07,125 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 248.0) internal successors, (5952), 24 states have internal predecessors, (5952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:07,125 INFO L175 Difference]: Start difference. First operand has 553 places, 3062 transitions, 110181 flow. Second operand 23 states and 2108 transitions. [2023-08-26 13:23:07,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 575 places, 3354 transitions, 126048 flow Received shutdown request... [2023-08-26 13:23:11,010 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr8ASSERT_VIOLATIONASSERT (10 of 11 remaining) [2023-08-26 13:23:11,015 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-08-26 13:23:11,054 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-26 13:23:11,054 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 [2023-08-26 13:23:11,213 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 [2023-08-26 13:23:11,213 WARN L619 AbstractCegarLoop]: Verification canceled: while executing RemoveRedundantFlow. [2023-08-26 13:23:11,223 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 11 remaining) [2023-08-26 13:23:11,224 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 11 remaining) [2023-08-26 13:23:11,224 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 11 remaining) [2023-08-26 13:23:11,224 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 11 remaining) [2023-08-26 13:23:11,224 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 11 remaining) [2023-08-26 13:23:11,224 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 11 remaining) [2023-08-26 13:23:11,224 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 11 remaining) [2023-08-26 13:23:11,224 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 11 remaining) [2023-08-26 13:23:11,224 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 11 remaining) [2023-08-26 13:23:11,224 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 11 remaining) [2023-08-26 13:23:11,225 INFO L445 BasicCegarLoop]: Path program histogram: [22, 5, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-26 13:23:11,228 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-26 13:23:11,228 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-26 13:23:11,237 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 01:23:11 BasicIcfg [2023-08-26 13:23:11,237 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-26 13:23:11,238 INFO L158 Benchmark]: Toolchain (without parser) took 846795.44ms. Allocated memory was 392.2MB in the beginning and 5.6GB in the end (delta: 5.2GB). Free memory was 367.2MB in the beginning and 3.0GB in the end (delta: -2.6GB). Peak memory consumption was 3.2GB. Max. memory is 16.0GB. [2023-08-26 13:23:11,238 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 392.2MB. Free memory was 368.5MB in the beginning and 368.3MB in the end (delta: 164.1kB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 13:23:11,238 INFO L158 Benchmark]: CACSL2BoogieTranslator took 178.56ms. Allocated memory is still 392.2MB. Free memory was 367.2MB in the beginning and 356.1MB in the end (delta: 11.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2023-08-26 13:23:11,238 INFO L158 Benchmark]: Boogie Procedure Inliner took 31.62ms. Allocated memory is still 392.2MB. Free memory was 356.1MB in the beginning and 354.6MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 13:23:11,238 INFO L158 Benchmark]: Boogie Preprocessor took 27.02ms. Allocated memory is still 392.2MB. Free memory was 354.6MB in the beginning and 353.3MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 13:23:11,239 INFO L158 Benchmark]: RCFGBuilder took 378.85ms. Allocated memory is still 392.2MB. Free memory was 353.3MB in the beginning and 337.8MB in the end (delta: 15.5MB). Peak memory consumption was 16.8MB. Max. memory is 16.0GB. [2023-08-26 13:23:11,239 INFO L158 Benchmark]: TraceAbstraction took 846175.40ms. Allocated memory was 392.2MB in the beginning and 5.6GB in the end (delta: 5.2GB). Free memory was 337.2MB in the beginning and 3.0GB in the end (delta: -2.7GB). Peak memory consumption was 3.1GB. Max. memory is 16.0GB. [2023-08-26 13:23:11,243 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 392.2MB. Free memory was 368.5MB in the beginning and 368.3MB in the end (delta: 164.1kB). There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 178.56ms. Allocated memory is still 392.2MB. Free memory was 367.2MB in the beginning and 356.1MB in the end (delta: 11.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 31.62ms. Allocated memory is still 392.2MB. Free memory was 356.1MB in the beginning and 354.6MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 27.02ms. Allocated memory is still 392.2MB. Free memory was 354.6MB in the beginning and 353.3MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 378.85ms. Allocated memory is still 392.2MB. Free memory was 353.3MB in the beginning and 337.8MB in the end (delta: 15.5MB). Peak memory consumption was 16.8MB. Max. memory is 16.0GB. * TraceAbstraction took 846175.40ms. Allocated memory was 392.2MB in the beginning and 5.6GB in the end (delta: 5.2GB). Free memory was 337.2MB in the beginning and 3.0GB in the end (delta: -2.7GB). Peak memory consumption was 3.1GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.0s, 115 PlacesBefore, 27 PlacesAfterwards, 117 TransitionsBefore, 23 TransitionsAfterwards, 972 CoEnabledTransitionPairs, 8 FixpointIterations, 71 TrivialSequentialCompositions, 30 ConcurrentSequentialCompositions, 7 TrivialYvCompositions, 6 ConcurrentYvCompositions, 6 ChoiceCompositions, 120 TotalNumberOfCompositions, 991 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 991, independent: 991, independent conditional: 0, independent unconditional: 991, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 505, independent: 505, independent conditional: 0, independent unconditional: 505, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 991, independent: 486, independent conditional: 0, independent unconditional: 486, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 505, unknown conditional: 0, unknown unconditional: 505] , Statistics on independence cache: Total cache size (in pairs): 27, Positive cache size: 27, Positive conditional cache size: 0, Positive unconditional cache size: 27, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, 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 executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 75]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 76]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing RemoveRedundantFlow. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 145 locations, 11 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: 846.1s, OverallIterations: 37, TraceHistogramMax: 5, PathProgramHistogramMax: 22, EmptinessCheckTime: 0.0s, AutomataDifference: 736.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.1s, HoareTripleCheckerStatistics: 7 mSolverCounterUnknown, 2964 SdHoareTripleChecker+Valid, 43.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2964 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 41.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 704 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 429 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 14497 IncrementalHoareTripleChecker+Invalid, 15637 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 429 mSolverCounterUnsat, 0 mSDtfsCounter, 14497 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1366 GetRequests, 620 SyntacticMatches, 65 SemanticMatches, 681 ConstructedPredicates, 9 IntricatePredicates, 0 DeprecatedPredicates, 5693 ImplicationChecksByTransitivity, 218.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=110181occurred in iteration=36, InterpolantAutomatonStates: 538, 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: 0.3s SsaConstructionTime, 2.2s SatisfiabilityAnalysisTime, 97.1s InterpolantComputationTime, 998 NumberOfCodeBlocks, 990 NumberOfCodeBlocksAsserted, 101 NumberOfCheckSat, 1364 ConstructedInterpolants, 28 QuantifiedInterpolants, 23920 SizeOfPredicates, 132 NumberOfNonLiveVariables, 3816 ConjunctsInSsa, 355 ConjunctsInUnsatCore, 91 InterpolantComputations, 10 PerfectInterpolantSequences, 186/640 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