/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/pthread-C-DAC/pthread-demo-datarace-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 12:21:20,946 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 12:21:21,035 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 12:21:21,041 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 12:21:21,042 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 12:21:21,074 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 12:21:21,074 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 12:21:21,075 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 12:21:21,075 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 12:21:21,079 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 12:21:21,079 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 12:21:21,079 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 12:21:21,080 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 12:21:21,081 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 12:21:21,081 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 12:21:21,081 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 12:21:21,082 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 12:21:21,082 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 12:21:21,082 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 12:21:21,082 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 12:21:21,082 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 12:21:21,083 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 12:21:21,083 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 12:21:21,084 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 12:21:21,084 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 12:21:21,084 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 12:21:21,084 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 12:21:21,085 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 12:21:21,085 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 12:21:21,085 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 12:21:21,086 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 12:21:21,086 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 12:21:21,086 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 12:21:21,087 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 12:21:21,087 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 12:21:21,087 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 12:21:21,407 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 12:21:21,424 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 12:21:21,426 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 12:21:21,427 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 12:21:21,428 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 12:21:21,429 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i [2023-08-26 12:21:22,749 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 12:21:23,001 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 12:21:23,002 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i [2023-08-26 12:21:23,030 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c568cdd3a/692f7e15793244199219a98a56ca46fe/FLAG9657644d3 [2023-08-26 12:21:23,043 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c568cdd3a/692f7e15793244199219a98a56ca46fe [2023-08-26 12:21:23,045 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 12:21:23,046 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 12:21:23,047 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 12:21:23,047 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 12:21:23,049 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 12:21:23,050 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 12:21:23" (1/1) ... [2023-08-26 12:21:23,050 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71260003 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:21:23, skipping insertion in model container [2023-08-26 12:21:23,051 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 12:21:23" (1/1) ... [2023-08-26 12:21:23,096 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 12:21:23,686 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 12:21:23,699 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 12:21:23,727 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [245] [2023-08-26 12:21:23,729 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [246] [2023-08-26 12:21:23,739 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: unsigned short [1102] [2023-08-26 12:21:23,755 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 12:21:23,846 INFO L206 MainTranslator]: Completed translation [2023-08-26 12:21:23,847 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:21:23 WrapperNode [2023-08-26 12:21:23,847 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 12:21:23,848 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 12:21:23,848 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 12:21:23,848 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 12:21:23,854 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:21:23" (1/1) ... [2023-08-26 12:21:23,873 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:21:23" (1/1) ... [2023-08-26 12:21:23,895 INFO L138 Inliner]: procedures = 364, calls = 21, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 65 [2023-08-26 12:21:23,895 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 12:21:23,896 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 12:21:23,896 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 12:21:23,896 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 12:21:23,904 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:21:23" (1/1) ... [2023-08-26 12:21:23,905 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:21:23" (1/1) ... [2023-08-26 12:21:23,921 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:21:23" (1/1) ... [2023-08-26 12:21:23,921 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:21:23" (1/1) ... [2023-08-26 12:21:23,925 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:21:23" (1/1) ... [2023-08-26 12:21:23,929 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:21:23" (1/1) ... [2023-08-26 12:21:23,930 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:21:23" (1/1) ... [2023-08-26 12:21:23,931 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:21:23" (1/1) ... [2023-08-26 12:21:23,936 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 12:21:23,937 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 12:21:23,937 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 12:21:23,938 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 12:21:23,938 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:21:23" (1/1) ... [2023-08-26 12:21:23,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 12:21:23,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 12:21:23,966 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 12:21:23,972 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 12:21:23,994 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 12:21:23,995 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 12:21:23,995 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-26 12:21:23,995 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 12:21:23,995 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-26 12:21:23,995 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 12:21:23,995 INFO L130 BoogieDeclarations]: Found specification of procedure thread_function_mutex [2023-08-26 12:21:23,996 INFO L138 BoogieDeclarations]: Found implementation of procedure thread_function_mutex [2023-08-26 12:21:23,996 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 12:21:23,996 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 12:21:23,996 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 12:21:23,997 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 12:21:24,117 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 12:21:24,118 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 12:21:24,248 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 12:21:24,254 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 12:21:24,255 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-26 12:21:24,256 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 12:21:24 BoogieIcfgContainer [2023-08-26 12:21:24,257 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 12:21:24,259 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 12:21:24,259 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 12:21:24,262 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 12:21:24,262 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 12:21:23" (1/3) ... [2023-08-26 12:21:24,262 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@235297f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 12:21:24, skipping insertion in model container [2023-08-26 12:21:24,263 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:21:23" (2/3) ... [2023-08-26 12:21:24,263 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@235297f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 12:21:24, skipping insertion in model container [2023-08-26 12:21:24,263 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 12:21:24" (3/3) ... [2023-08-26 12:21:24,264 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-demo-datarace-1.i [2023-08-26 12:21:24,280 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 12:21:24,280 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2023-08-26 12:21:24,280 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 12:21:24,341 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-26 12:21:24,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 90 places, 94 transitions, 196 flow [2023-08-26 12:21:24,435 INFO L124 PetriNetUnfolderBase]: 8/93 cut-off events. [2023-08-26 12:21:24,436 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 12:21:24,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98 conditions, 93 events. 8/93 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 108 event pairs, 0 based on Foata normal form. 0/80 useless extension candidates. Maximal degree in co-relation 40. Up to 2 conditions per place. [2023-08-26 12:21:24,442 INFO L82 GeneralOperation]: Start removeDead. Operand has 90 places, 94 transitions, 196 flow [2023-08-26 12:21:24,456 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 81 places, 83 transitions, 172 flow [2023-08-26 12:21:24,460 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 12:21:24,480 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 81 places, 83 transitions, 172 flow [2023-08-26 12:21:24,487 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 81 places, 83 transitions, 172 flow [2023-08-26 12:21:24,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 81 places, 83 transitions, 172 flow [2023-08-26 12:21:24,510 INFO L124 PetriNetUnfolderBase]: 6/83 cut-off events. [2023-08-26 12:21:24,510 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 12:21:24,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88 conditions, 83 events. 6/83 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 95 event pairs, 0 based on Foata normal form. 0/73 useless extension candidates. Maximal degree in co-relation 40. Up to 2 conditions per place. [2023-08-26 12:21:24,512 INFO L119 LiptonReduction]: Number of co-enabled transitions 798 [2023-08-26 12:21:26,554 INFO L134 LiptonReduction]: Checked pairs total: 1058 [2023-08-26 12:21:26,555 INFO L136 LiptonReduction]: Total number of compositions: 74 [2023-08-26 12:21:26,567 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 12:21:26,572 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;@298b2938, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 12:21:26,572 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-26 12:21:26,574 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 12:21:26,574 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2023-08-26 12:21:26,574 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 12:21:26,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:21:26,575 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-26 12:21:26,575 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2023-08-26 12:21:26,579 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:21:26,579 INFO L85 PathProgramCache]: Analyzing trace with hash 350, now seen corresponding path program 1 times [2023-08-26 12:21:26,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:21:26,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917092936] [2023-08-26 12:21:26,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:21:26,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:21:26,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:21:26,684 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 12:21:26,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:21:26,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917092936] [2023-08-26 12:21:26,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917092936] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:21:26,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:21:26,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-26 12:21:26,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541781691] [2023-08-26 12:21:26,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:21:26,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 12:21:26,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:21:26,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 12:21:26,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 12:21:26,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 168 [2023-08-26 12:21:26,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 19 transitions, 44 flow. Second operand has 2 states, 2 states have (on average 83.5) internal successors, (167), 2 states have internal predecessors, (167), 0 states have call successors, (0), 0 states 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 12:21:26,719 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:21:26,719 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 168 [2023-08-26 12:21:26,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:21:26,755 INFO L124 PetriNetUnfolderBase]: 37/78 cut-off events. [2023-08-26 12:21:26,755 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 12:21:26,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 160 conditions, 78 events. 37/78 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 221 event pairs, 25 based on Foata normal form. 0/52 useless extension candidates. Maximal degree in co-relation 146. Up to 77 conditions per place. [2023-08-26 12:21:26,757 INFO L140 encePairwiseOnDemand]: 166/168 looper letters, 16 selfloop transitions, 0 changer transitions 0/17 dead transitions. [2023-08-26 12:21:26,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 20 places, 17 transitions, 72 flow [2023-08-26 12:21:26,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 12:21:26,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 12:21:26,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 184 transitions. [2023-08-26 12:21:26,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2023-08-26 12:21:26,769 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 184 transitions. [2023-08-26 12:21:26,769 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 184 transitions. [2023-08-26 12:21:26,770 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:21:26,772 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 184 transitions. [2023-08-26 12:21:26,774 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 92.0) internal successors, (184), 2 states have internal predecessors, (184), 0 states have call successors, (0), 0 states 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 12:21:26,778 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 168.0) internal successors, (504), 3 states have internal predecessors, (504), 0 states have call successors, (0), 0 states 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 12:21:26,779 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 168.0) internal successors, (504), 3 states have internal predecessors, (504), 0 states have call successors, (0), 0 states 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 12:21:26,780 INFO L175 Difference]: Start difference. First operand has 21 places, 19 transitions, 44 flow. Second operand 2 states and 184 transitions. [2023-08-26 12:21:26,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 20 places, 17 transitions, 72 flow [2023-08-26 12:21:26,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 17 transitions, 68 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 12:21:26,784 INFO L231 Difference]: Finished difference. Result has 18 places, 17 transitions, 36 flow [2023-08-26 12:21:26,785 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=36, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=36, PETRI_PLACES=18, PETRI_TRANSITIONS=17} [2023-08-26 12:21:26,788 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, -3 predicate places. [2023-08-26 12:21:26,788 INFO L495 AbstractCegarLoop]: Abstraction has has 18 places, 17 transitions, 36 flow [2023-08-26 12:21:26,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 83.5) internal successors, (167), 2 states have internal predecessors, (167), 0 states have call successors, (0), 0 states 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 12:21:26,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:21:26,789 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-26 12:21:26,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 12:21:26,789 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2023-08-26 12:21:26,790 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:21:26,790 INFO L85 PathProgramCache]: Analyzing trace with hash 10611601, now seen corresponding path program 1 times [2023-08-26 12:21:26,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:21:26,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548241514] [2023-08-26 12:21:26,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:21:26,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:21:26,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:21:26,937 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 12:21:26,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:21:26,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548241514] [2023-08-26 12:21:26,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548241514] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:21:26,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:21:26,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 12:21:26,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715504276] [2023-08-26 12:21:26,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:21:26,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:21:26,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:21:26,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:21:26,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:21:26,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 168 [2023-08-26 12:21:26,941 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 18 places, 17 transitions, 36 flow. Second operand has 3 states, 3 states have (on average 77.33333333333333) internal successors, (232), 3 states have internal predecessors, (232), 0 states have call successors, (0), 0 states 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 12:21:26,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:21:26,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 168 [2023-08-26 12:21:26,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:21:27,002 INFO L124 PetriNetUnfolderBase]: 49/112 cut-off events. [2023-08-26 12:21:27,003 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 12:21:27,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 216 conditions, 112 events. 49/112 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 379 event pairs, 25 based on Foata normal form. 0/86 useless extension candidates. Maximal degree in co-relation 213. Up to 77 conditions per place. [2023-08-26 12:21:27,004 INFO L140 encePairwiseOnDemand]: 163/168 looper letters, 22 selfloop transitions, 2 changer transitions 0/25 dead transitions. [2023-08-26 12:21:27,004 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 20 places, 25 transitions, 100 flow [2023-08-26 12:21:27,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:21:27,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:21:27,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 255 transitions. [2023-08-26 12:21:27,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5059523809523809 [2023-08-26 12:21:27,007 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 255 transitions. [2023-08-26 12:21:27,007 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 255 transitions. [2023-08-26 12:21:27,008 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:21:27,008 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 255 transitions. [2023-08-26 12:21:27,009 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 0 states have call successors, (0), 0 states 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 12:21:27,011 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 168.0) internal successors, (672), 4 states have internal predecessors, (672), 0 states have call successors, (0), 0 states 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 12:21:27,011 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 168.0) internal successors, (672), 4 states have internal predecessors, (672), 0 states have call successors, (0), 0 states 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 12:21:27,011 INFO L175 Difference]: Start difference. First operand has 18 places, 17 transitions, 36 flow. Second operand 3 states and 255 transitions. [2023-08-26 12:21:27,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 20 places, 25 transitions, 100 flow [2023-08-26 12:21:27,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 25 transitions, 100 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 12:21:27,012 INFO L231 Difference]: Finished difference. Result has 21 places, 18 transitions, 52 flow [2023-08-26 12:21:27,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=36, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=52, PETRI_PLACES=21, PETRI_TRANSITIONS=18} [2023-08-26 12:21:27,013 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 0 predicate places. [2023-08-26 12:21:27,013 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 18 transitions, 52 flow [2023-08-26 12:21:27,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.33333333333333) internal successors, (232), 3 states have internal predecessors, (232), 0 states have call successors, (0), 0 states 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 12:21:27,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:21:27,014 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:21:27,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 12:21:27,014 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2023-08-26 12:21:27,015 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:21:27,015 INFO L85 PathProgramCache]: Analyzing trace with hash -1697637123, now seen corresponding path program 1 times [2023-08-26 12:21:27,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:21:27,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498821870] [2023-08-26 12:21:27,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:21:27,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:21:27,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:21:27,114 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:21:27,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:21:27,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498821870] [2023-08-26 12:21:27,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498821870] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 12:21:27,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613800055] [2023-08-26 12:21:27,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:21:27,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 12:21:27,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 12:21:27,157 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 12:21:27,159 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 12:21:27,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:21:27,224 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-26 12:21:27,228 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 12:21:27,260 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:21:27,260 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 12:21:27,284 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:21:27,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613800055] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 12:21:27,289 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 12:21:27,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-26 12:21:27,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305174030] [2023-08-26 12:21:27,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 12:21:27,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 12:21:27,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:21:27,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 12:21:27,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-26 12:21:27,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 168 [2023-08-26 12:21:27,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 18 transitions, 52 flow. Second operand has 7 states, 7 states have (on average 77.85714285714286) internal successors, (545), 7 states have internal predecessors, (545), 0 states have call successors, (0), 0 states 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 12:21:27,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:21:27,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 168 [2023-08-26 12:21:27,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:21:27,421 INFO L124 PetriNetUnfolderBase]: 79/184 cut-off events. [2023-08-26 12:21:27,421 INFO L125 PetriNetUnfolderBase]: For 44/44 co-relation queries the response was YES. [2023-08-26 12:21:27,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 404 conditions, 184 events. 79/184 cut-off events. For 44/44 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 553 event pairs, 20 based on Foata normal form. 18/177 useless extension candidates. Maximal degree in co-relation 399. Up to 59 conditions per place. [2023-08-26 12:21:27,423 INFO L140 encePairwiseOnDemand]: 162/168 looper letters, 41 selfloop transitions, 6 changer transitions 0/48 dead transitions. [2023-08-26 12:21:27,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 48 transitions, 210 flow [2023-08-26 12:21:27,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 12:21:27,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 12:21:27,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 512 transitions. [2023-08-26 12:21:27,427 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5079365079365079 [2023-08-26 12:21:27,427 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 512 transitions. [2023-08-26 12:21:27,427 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 512 transitions. [2023-08-26 12:21:27,427 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:21:27,428 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 512 transitions. [2023-08-26 12:21:27,429 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 85.33333333333333) internal successors, (512), 6 states have internal predecessors, (512), 0 states have call successors, (0), 0 states 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 12:21:27,432 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 168.0) internal successors, (1176), 7 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states 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 12:21:27,432 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 168.0) internal successors, (1176), 7 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states 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 12:21:27,432 INFO L175 Difference]: Start difference. First operand has 21 places, 18 transitions, 52 flow. Second operand 6 states and 512 transitions. [2023-08-26 12:21:27,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 48 transitions, 210 flow [2023-08-26 12:21:27,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 48 transitions, 208 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 12:21:27,434 INFO L231 Difference]: Finished difference. Result has 29 places, 21 transitions, 102 flow [2023-08-26 12:21:27,434 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=102, PETRI_PLACES=29, PETRI_TRANSITIONS=21} [2023-08-26 12:21:27,435 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 8 predicate places. [2023-08-26 12:21:27,435 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 21 transitions, 102 flow [2023-08-26 12:21:27,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 77.85714285714286) internal successors, (545), 7 states have internal predecessors, (545), 0 states have call successors, (0), 0 states 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 12:21:27,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:21:27,436 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1] [2023-08-26 12:21:27,479 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 12:21:27,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 12:21:27,640 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2023-08-26 12:21:27,641 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:21:27,641 INFO L85 PathProgramCache]: Analyzing trace with hash -105612143, now seen corresponding path program 2 times [2023-08-26 12:21:27,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:21:27,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131634558] [2023-08-26 12:21:27,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:21:27,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:21:27,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:21:27,798 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:21:27,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:21:27,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131634558] [2023-08-26 12:21:27,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131634558] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 12:21:27,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575074102] [2023-08-26 12:21:27,799 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 12:21:27,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 12:21:27,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 12:21:27,801 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 12:21:27,812 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 12:21:27,882 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-26 12:21:27,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 12:21:27,884 INFO L262 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-26 12:21:27,885 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 12:21:27,916 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-26 12:21:28,000 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-08-26 12:21:28,000 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-26 12:21:28,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575074102] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:21:28,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-26 12:21:28,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [6] total 7 [2023-08-26 12:21:28,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707330737] [2023-08-26 12:21:28,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:21:28,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:21:28,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:21:28,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:21:28,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-08-26 12:21:28,003 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 168 [2023-08-26 12:21:28,003 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 21 transitions, 102 flow. Second operand has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 0 states 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 12:21:28,003 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:21:28,003 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 168 [2023-08-26 12:21:28,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:21:28,035 INFO L124 PetriNetUnfolderBase]: 73/156 cut-off events. [2023-08-26 12:21:28,035 INFO L125 PetriNetUnfolderBase]: For 231/231 co-relation queries the response was YES. [2023-08-26 12:21:28,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 481 conditions, 156 events. 73/156 cut-off events. For 231/231 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 444 event pairs, 55 based on Foata normal form. 0/130 useless extension candidates. Maximal degree in co-relation 473. Up to 148 conditions per place. [2023-08-26 12:21:28,037 INFO L140 encePairwiseOnDemand]: 166/168 looper letters, 18 selfloop transitions, 1 changer transitions 0/20 dead transitions. [2023-08-26 12:21:28,037 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 20 transitions, 130 flow [2023-08-26 12:21:28,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:21:28,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:21:28,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 226 transitions. [2023-08-26 12:21:28,038 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44841269841269843 [2023-08-26 12:21:28,038 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 226 transitions. [2023-08-26 12:21:28,038 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 226 transitions. [2023-08-26 12:21:28,039 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:21:28,039 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 226 transitions. [2023-08-26 12:21:28,039 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 0 states have call successors, (0), 0 states 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 12:21:28,040 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 168.0) internal successors, (672), 4 states have internal predecessors, (672), 0 states have call successors, (0), 0 states 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 12:21:28,041 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 168.0) internal successors, (672), 4 states have internal predecessors, (672), 0 states have call successors, (0), 0 states 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 12:21:28,041 INFO L175 Difference]: Start difference. First operand has 29 places, 21 transitions, 102 flow. Second operand 3 states and 226 transitions. [2023-08-26 12:21:28,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 20 transitions, 130 flow [2023-08-26 12:21:28,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 20 transitions, 122 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-08-26 12:21:28,043 INFO L231 Difference]: Finished difference. Result has 29 places, 20 transitions, 86 flow [2023-08-26 12:21:28,043 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=29, PETRI_TRANSITIONS=20} [2023-08-26 12:21:28,044 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 8 predicate places. [2023-08-26 12:21:28,044 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 20 transitions, 86 flow [2023-08-26 12:21:28,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 0 states 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 12:21:28,044 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:21:28,044 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1] [2023-08-26 12:21:28,052 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 12:21:28,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-08-26 12:21:28,250 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2023-08-26 12:21:28,250 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:21:28,250 INFO L85 PathProgramCache]: Analyzing trace with hash -105612144, now seen corresponding path program 1 times [2023-08-26 12:21:28,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:21:28,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966121579] [2023-08-26 12:21:28,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:21:28,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:21:28,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:21:28,311 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-08-26 12:21:28,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:21:28,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966121579] [2023-08-26 12:21:28,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966121579] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:21:28,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:21:28,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 12:21:28,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143885247] [2023-08-26 12:21:28,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:21:28,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:21:28,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:21:28,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:21:28,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:21:28,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 168 [2023-08-26 12:21:28,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 20 transitions, 86 flow. Second operand has 3 states, 3 states have (on average 71.0) internal successors, (213), 3 states have internal predecessors, (213), 0 states have call successors, (0), 0 states 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 12:21:28,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:21:28,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 168 [2023-08-26 12:21:28,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:21:28,352 INFO L124 PetriNetUnfolderBase]: 67/144 cut-off events. [2023-08-26 12:21:28,352 INFO L125 PetriNetUnfolderBase]: For 163/163 co-relation queries the response was YES. [2023-08-26 12:21:28,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 411 conditions, 144 events. 67/144 cut-off events. For 163/163 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 401 event pairs, 50 based on Foata normal form. 0/125 useless extension candidates. Maximal degree in co-relation 402. Up to 136 conditions per place. [2023-08-26 12:21:28,357 INFO L140 encePairwiseOnDemand]: 166/168 looper letters, 17 selfloop transitions, 1 changer transitions 0/19 dead transitions. [2023-08-26 12:21:28,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 19 transitions, 112 flow [2023-08-26 12:21:28,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:21:28,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:21:28,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 222 transitions. [2023-08-26 12:21:28,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2023-08-26 12:21:28,359 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 222 transitions. [2023-08-26 12:21:28,359 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 222 transitions. [2023-08-26 12:21:28,359 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:21:28,359 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 222 transitions. [2023-08-26 12:21:28,360 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 74.0) internal successors, (222), 3 states have internal predecessors, (222), 0 states have call successors, (0), 0 states 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 12:21:28,361 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 168.0) internal successors, (672), 4 states have internal predecessors, (672), 0 states have call successors, (0), 0 states 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 12:21:28,362 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 168.0) internal successors, (672), 4 states have internal predecessors, (672), 0 states have call successors, (0), 0 states 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 12:21:28,362 INFO L175 Difference]: Start difference. First operand has 29 places, 20 transitions, 86 flow. Second operand 3 states and 222 transitions. [2023-08-26 12:21:28,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 19 transitions, 112 flow [2023-08-26 12:21:28,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 19 transitions, 111 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 12:21:28,365 INFO L231 Difference]: Finished difference. Result has 29 places, 19 transitions, 77 flow [2023-08-26 12:21:28,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=75, PETRI_DIFFERENCE_MINUEND_PLACES=27, 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=77, PETRI_PLACES=29, PETRI_TRANSITIONS=19} [2023-08-26 12:21:28,367 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 8 predicate places. [2023-08-26 12:21:28,367 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 19 transitions, 77 flow [2023-08-26 12:21:28,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.0) internal successors, (213), 3 states have internal predecessors, (213), 0 states have call successors, (0), 0 states 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 12:21:28,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:21:28,368 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:21:28,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 12:21:28,368 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2023-08-26 12:21:28,369 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:21:28,369 INFO L85 PathProgramCache]: Analyzing trace with hash -1905815957, now seen corresponding path program 1 times [2023-08-26 12:21:28,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:21:28,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065172872] [2023-08-26 12:21:28,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:21:28,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:21:28,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:21:28,432 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-26 12:21:28,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:21:28,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065172872] [2023-08-26 12:21:28,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065172872] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:21:28,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:21:28,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 12:21:28,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980743110] [2023-08-26 12:21:28,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:21:28,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:21:28,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:21:28,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:21:28,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:21:28,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 168 [2023-08-26 12:21:28,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 19 transitions, 77 flow. Second operand has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 0 states 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 12:21:28,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:21:28,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 168 [2023-08-26 12:21:28,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:21:28,481 INFO L124 PetriNetUnfolderBase]: 111/232 cut-off events. [2023-08-26 12:21:28,482 INFO L125 PetriNetUnfolderBase]: For 291/291 co-relation queries the response was YES. [2023-08-26 12:21:28,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 668 conditions, 232 events. 111/232 cut-off events. For 291/291 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 808 event pairs, 50 based on Foata normal form. 0/221 useless extension candidates. Maximal degree in co-relation 659. Up to 137 conditions per place. [2023-08-26 12:21:28,483 INFO L140 encePairwiseOnDemand]: 165/168 looper letters, 28 selfloop transitions, 2 changer transitions 0/31 dead transitions. [2023-08-26 12:21:28,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 31 transitions, 195 flow [2023-08-26 12:21:28,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:21:28,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:21:28,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 254 transitions. [2023-08-26 12:21:28,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.503968253968254 [2023-08-26 12:21:28,485 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 254 transitions. [2023-08-26 12:21:28,485 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 254 transitions. [2023-08-26 12:21:28,486 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:21:28,486 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 254 transitions. [2023-08-26 12:21:28,486 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 0 states have call successors, (0), 0 states 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 12:21:28,488 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 168.0) internal successors, (672), 4 states have internal predecessors, (672), 0 states have call successors, (0), 0 states 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 12:21:28,488 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 168.0) internal successors, (672), 4 states have internal predecessors, (672), 0 states have call successors, (0), 0 states 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 12:21:28,488 INFO L175 Difference]: Start difference. First operand has 29 places, 19 transitions, 77 flow. Second operand 3 states and 254 transitions. [2023-08-26 12:21:28,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 31 transitions, 195 flow [2023-08-26 12:21:28,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 31 transitions, 194 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 12:21:28,492 INFO L231 Difference]: Finished difference. Result has 31 places, 20 transitions, 88 flow [2023-08-26 12:21:28,492 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=31, PETRI_TRANSITIONS=20} [2023-08-26 12:21:28,494 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 10 predicate places. [2023-08-26 12:21:28,495 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 20 transitions, 88 flow [2023-08-26 12:21:28,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 0 states 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 12:21:28,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:21:28,495 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:21:28,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 12:21:28,496 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2023-08-26 12:21:28,501 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:21:28,501 INFO L85 PathProgramCache]: Analyzing trace with hash -200456292, now seen corresponding path program 1 times [2023-08-26 12:21:28,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:21:28,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482623552] [2023-08-26 12:21:28,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:21:28,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:21:28,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:21:28,600 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-26 12:21:28,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:21:28,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482623552] [2023-08-26 12:21:28,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482623552] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 12:21:28,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425606978] [2023-08-26 12:21:28,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:21:28,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 12:21:28,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 12:21:28,603 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 12:21:28,615 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 12:21:28,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:21:28,702 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-26 12:21:28,703 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 12:21:28,736 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-26 12:21:28,736 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 12:21:28,778 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-26 12:21:28,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425606978] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 12:21:28,780 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 12:21:28,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-08-26 12:21:28,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667505403] [2023-08-26 12:21:28,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 12:21:28,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 12:21:28,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:21:28,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 12:21:28,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-26 12:21:28,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 168 [2023-08-26 12:21:28,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 20 transitions, 88 flow. Second operand has 7 states, 7 states have (on average 80.85714285714286) internal successors, (566), 7 states have internal predecessors, (566), 0 states have call successors, (0), 0 states 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 12:21:28,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:21:28,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 168 [2023-08-26 12:21:28,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:21:28,919 INFO L124 PetriNetUnfolderBase]: 210/430 cut-off events. [2023-08-26 12:21:28,919 INFO L125 PetriNetUnfolderBase]: For 572/572 co-relation queries the response was YES. [2023-08-26 12:21:28,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1322 conditions, 430 events. 210/430 cut-off events. For 572/572 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1610 event pairs, 26 based on Foata normal form. 33/463 useless extension candidates. Maximal degree in co-relation 1312. Up to 114 conditions per place. [2023-08-26 12:21:28,923 INFO L140 encePairwiseOnDemand]: 164/168 looper letters, 57 selfloop transitions, 6 changer transitions 0/64 dead transitions. [2023-08-26 12:21:28,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 64 transitions, 442 flow [2023-08-26 12:21:28,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 12:21:28,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 12:21:28,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 508 transitions. [2023-08-26 12:21:28,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.503968253968254 [2023-08-26 12:21:28,925 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 508 transitions. [2023-08-26 12:21:28,926 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 508 transitions. [2023-08-26 12:21:28,927 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:21:28,927 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 508 transitions. [2023-08-26 12:21:28,928 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 84.66666666666667) internal successors, (508), 6 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:21:28,930 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 168.0) internal successors, (1176), 7 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states 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 12:21:28,930 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 168.0) internal successors, (1176), 7 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states 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 12:21:28,930 INFO L175 Difference]: Start difference. First operand has 31 places, 20 transitions, 88 flow. Second operand 6 states and 508 transitions. [2023-08-26 12:21:28,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 64 transitions, 442 flow [2023-08-26 12:21:28,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 64 transitions, 440 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 12:21:28,934 INFO L231 Difference]: Finished difference. Result has 39 places, 23 transitions, 126 flow [2023-08-26 12:21:28,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=126, PETRI_PLACES=39, PETRI_TRANSITIONS=23} [2023-08-26 12:21:28,935 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 18 predicate places. [2023-08-26 12:21:28,935 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 23 transitions, 126 flow [2023-08-26 12:21:28,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 80.85714285714286) internal successors, (566), 7 states have internal predecessors, (566), 0 states have call successors, (0), 0 states 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 12:21:28,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:21:28,936 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:21:28,945 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-26 12:21:29,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 12:21:29,141 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2023-08-26 12:21:29,141 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:21:29,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1658925175, now seen corresponding path program 2 times [2023-08-26 12:21:29,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:21:29,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327239658] [2023-08-26 12:21:29,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:21:29,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:21:29,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:21:29,243 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-08-26 12:21:29,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:21:29,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327239658] [2023-08-26 12:21:29,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327239658] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:21:29,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:21:29,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 12:21:29,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768818100] [2023-08-26 12:21:29,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:21:29,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:21:29,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:21:29,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:21:29,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:21:29,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 168 [2023-08-26 12:21:29,246 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 23 transitions, 126 flow. Second operand has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 3 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 12:21:29,246 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:21:29,246 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 168 [2023-08-26 12:21:29,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:21:29,302 INFO L124 PetriNetUnfolderBase]: 82/274 cut-off events. [2023-08-26 12:21:29,302 INFO L125 PetriNetUnfolderBase]: For 645/645 co-relation queries the response was YES. [2023-08-26 12:21:29,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 944 conditions, 274 events. 82/274 cut-off events. For 645/645 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 963 event pairs, 36 based on Foata normal form. 80/354 useless extension candidates. Maximal degree in co-relation 931. Up to 158 conditions per place. [2023-08-26 12:21:29,305 INFO L140 encePairwiseOnDemand]: 164/168 looper letters, 14 selfloop transitions, 12 changer transitions 0/27 dead transitions. [2023-08-26 12:21:29,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 27 transitions, 211 flow [2023-08-26 12:21:29,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:21:29,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:21:29,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 239 transitions. [2023-08-26 12:21:29,307 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4742063492063492 [2023-08-26 12:21:29,307 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 239 transitions. [2023-08-26 12:21:29,307 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 239 transitions. [2023-08-26 12:21:29,307 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:21:29,307 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 239 transitions. [2023-08-26 12:21:29,308 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 0 states have call successors, (0), 0 states 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 12:21:29,309 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 168.0) internal successors, (672), 4 states have internal predecessors, (672), 0 states have call successors, (0), 0 states 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 12:21:29,309 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 168.0) internal successors, (672), 4 states have internal predecessors, (672), 0 states have call successors, (0), 0 states 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 12:21:29,309 INFO L175 Difference]: Start difference. First operand has 39 places, 23 transitions, 126 flow. Second operand 3 states and 239 transitions. [2023-08-26 12:21:29,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 27 transitions, 211 flow [2023-08-26 12:21:29,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 27 transitions, 202 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-08-26 12:21:29,311 INFO L231 Difference]: Finished difference. Result has 40 places, 23 transitions, 142 flow [2023-08-26 12:21:29,312 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=142, PETRI_PLACES=40, PETRI_TRANSITIONS=23} [2023-08-26 12:21:29,313 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 19 predicate places. [2023-08-26 12:21:29,313 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 23 transitions, 142 flow [2023-08-26 12:21:29,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 3 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 12:21:29,314 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:21:29,314 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:21:29,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-26 12:21:29,314 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2023-08-26 12:21:29,315 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:21:29,315 INFO L85 PathProgramCache]: Analyzing trace with hash 1375233741, now seen corresponding path program 3 times [2023-08-26 12:21:29,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:21:29,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269902081] [2023-08-26 12:21:29,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:21:29,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:21:29,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:21:29,460 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 22 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-08-26 12:21:29,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:21:29,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269902081] [2023-08-26 12:21:29,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269902081] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 12:21:29,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174694059] [2023-08-26 12:21:29,461 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-26 12:21:29,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 12:21:29,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 12:21:29,465 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 12:21:29,473 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 12:21:29,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-08-26 12:21:29,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 12:21:29,585 INFO L262 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-26 12:21:29,587 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 12:21:29,658 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-26 12:21:29,659 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 12:21:29,743 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-26 12:21:29,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174694059] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 12:21:29,743 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 12:21:29,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-08-26 12:21:29,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370611514] [2023-08-26 12:21:29,744 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 12:21:29,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-26 12:21:29,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:21:29,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-26 12:21:29,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2023-08-26 12:21:29,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 168 [2023-08-26 12:21:29,749 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 23 transitions, 142 flow. Second operand has 17 states, 17 states have (on average 73.70588235294117) internal successors, (1253), 17 states have internal predecessors, (1253), 0 states have call successors, (0), 0 states 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 12:21:29,749 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:21:29,749 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 168 [2023-08-26 12:21:29,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:21:30,703 INFO L124 PetriNetUnfolderBase]: 177/677 cut-off events. [2023-08-26 12:21:30,703 INFO L125 PetriNetUnfolderBase]: For 2547/2547 co-relation queries the response was YES. [2023-08-26 12:21:30,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2526 conditions, 677 events. 177/677 cut-off events. For 2547/2547 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 2979 event pairs, 5 based on Foata normal form. 127/804 useless extension candidates. Maximal degree in co-relation 2512. Up to 166 conditions per place. [2023-08-26 12:21:30,709 INFO L140 encePairwiseOnDemand]: 161/168 looper letters, 278 selfloop transitions, 138 changer transitions 0/417 dead transitions. [2023-08-26 12:21:30,709 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 417 transitions, 3286 flow [2023-08-26 12:21:30,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2023-08-26 12:21:30,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2023-08-26 12:21:30,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 5153 transitions. [2023-08-26 12:21:30,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4578002842928216 [2023-08-26 12:21:30,721 INFO L72 ComplementDD]: Start complementDD. Operand 67 states and 5153 transitions. [2023-08-26 12:21:30,721 INFO L73 IsDeterministic]: Start isDeterministic. Operand 67 states and 5153 transitions. [2023-08-26 12:21:30,724 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:21:30,724 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 67 states and 5153 transitions. [2023-08-26 12:21:30,733 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 68 states, 67 states have (on average 76.91044776119404) internal successors, (5153), 67 states have internal predecessors, (5153), 0 states have call successors, (0), 0 states 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 12:21:30,793 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 68 states, 68 states have (on average 168.0) internal successors, (11424), 68 states have internal predecessors, (11424), 0 states have call successors, (0), 0 states 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 12:21:30,796 INFO L81 ComplementDD]: Finished complementDD. Result has 68 states, 68 states have (on average 168.0) internal successors, (11424), 68 states have internal predecessors, (11424), 0 states have call successors, (0), 0 states 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 12:21:30,796 INFO L175 Difference]: Start difference. First operand has 40 places, 23 transitions, 142 flow. Second operand 67 states and 5153 transitions. [2023-08-26 12:21:30,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 417 transitions, 3286 flow [2023-08-26 12:21:30,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 417 transitions, 3028 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 12:21:30,807 INFO L231 Difference]: Finished difference. Result has 151 places, 162 transitions, 1688 flow [2023-08-26 12:21:30,808 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=67, PETRI_FLOW=1688, PETRI_PLACES=151, PETRI_TRANSITIONS=162} [2023-08-26 12:21:30,808 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 130 predicate places. [2023-08-26 12:21:30,808 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 162 transitions, 1688 flow [2023-08-26 12:21:30,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 73.70588235294117) internal successors, (1253), 17 states have internal predecessors, (1253), 0 states have call successors, (0), 0 states 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 12:21:30,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:21:30,809 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:21:30,822 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-26 12:21:31,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 12:21:31,014 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2023-08-26 12:21:31,014 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:21:31,014 INFO L85 PathProgramCache]: Analyzing trace with hash 1172421471, now seen corresponding path program 4 times [2023-08-26 12:21:31,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:21:31,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903255105] [2023-08-26 12:21:31,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:21:31,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:21:31,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:21:31,248 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 10 proven. 35 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2023-08-26 12:21:31,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:21:31,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903255105] [2023-08-26 12:21:31,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903255105] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 12:21:31,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341881122] [2023-08-26 12:21:31,249 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-26 12:21:31,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 12:21:31,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 12:21:31,253 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 12:21:31,282 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 12:21:31,420 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-26 12:21:31,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 12:21:31,422 INFO L262 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-26 12:21:31,424 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 12:21:31,502 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 10 proven. 35 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2023-08-26 12:21:31,502 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 12:21:31,643 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 10 proven. 35 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2023-08-26 12:21:31,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341881122] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 12:21:31,644 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 12:21:31,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2023-08-26 12:21:31,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489602396] [2023-08-26 12:21:31,644 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 12:21:31,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-26 12:21:31,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:21:31,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-26 12:21:31,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2023-08-26 12:21:31,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 168 [2023-08-26 12:21:31,648 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 162 transitions, 1688 flow. Second operand has 15 states, 15 states have (on average 78.8) internal successors, (1182), 15 states have internal predecessors, (1182), 0 states have call successors, (0), 0 states 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 12:21:31,648 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:21:31,648 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 168 [2023-08-26 12:21:31,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:21:32,053 INFO L124 PetriNetUnfolderBase]: 280/1240 cut-off events. [2023-08-26 12:21:32,054 INFO L125 PetriNetUnfolderBase]: For 64875/64875 co-relation queries the response was YES. [2023-08-26 12:21:32,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6869 conditions, 1240 events. 280/1240 cut-off events. For 64875/64875 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 6785 event pairs, 44 based on Foata normal form. 301/1541 useless extension candidates. Maximal degree in co-relation 6809. Up to 307 conditions per place. [2023-08-26 12:21:32,067 INFO L140 encePairwiseOnDemand]: 164/168 looper letters, 238 selfloop transitions, 144 changer transitions 0/383 dead transitions. [2023-08-26 12:21:32,068 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 383 transitions, 5298 flow [2023-08-26 12:21:32,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-26 12:21:32,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-26 12:21:32,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1180 transitions. [2023-08-26 12:21:32,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5017006802721088 [2023-08-26 12:21:32,072 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1180 transitions. [2023-08-26 12:21:32,072 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1180 transitions. [2023-08-26 12:21:32,073 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:21:32,073 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1180 transitions. [2023-08-26 12:21:32,075 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 84.28571428571429) internal successors, (1180), 14 states have internal predecessors, (1180), 0 states have call successors, (0), 0 states 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 12:21:32,078 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 168.0) internal successors, (2520), 15 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states 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 12:21:32,079 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 168.0) internal successors, (2520), 15 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states 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 12:21:32,079 INFO L175 Difference]: Start difference. First operand has 151 places, 162 transitions, 1688 flow. Second operand 14 states and 1180 transitions. [2023-08-26 12:21:32,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 383 transitions, 5298 flow [2023-08-26 12:21:32,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 383 transitions, 5154 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-26 12:21:32,182 INFO L231 Difference]: Finished difference. Result has 166 places, 229 transitions, 2669 flow [2023-08-26 12:21:32,182 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=1586, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2669, PETRI_PLACES=166, PETRI_TRANSITIONS=229} [2023-08-26 12:21:32,182 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 145 predicate places. [2023-08-26 12:21:32,183 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 229 transitions, 2669 flow [2023-08-26 12:21:32,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 78.8) internal successors, (1182), 15 states have internal predecessors, (1182), 0 states have call successors, (0), 0 states 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 12:21:32,183 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:21:32,183 INFO L208 CegarLoopForPetriNet]: trace histogram [12, 12, 12, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:21:32,191 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-26 12:21:32,389 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,SelfDestructingSolverStorable9 [2023-08-26 12:21:32,389 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2023-08-26 12:21:32,389 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:21:32,389 INFO L85 PathProgramCache]: Analyzing trace with hash 1829886433, now seen corresponding path program 5 times [2023-08-26 12:21:32,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:21:32,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947386073] [2023-08-26 12:21:32,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:21:32,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:21:32,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:21:32,770 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2023-08-26 12:21:32,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:21:32,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947386073] [2023-08-26 12:21:32,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947386073] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 12:21:32,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370814270] [2023-08-26 12:21:32,771 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-26 12:21:32,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 12:21:32,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 12:21:32,773 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 12:21:32,775 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 12:21:32,967 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2023-08-26 12:21:32,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 12:21:32,969 INFO L262 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-26 12:21:32,972 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 12:21:33,153 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 10 proven. 210 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2023-08-26 12:21:33,153 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 12:21:33,417 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 10 proven. 210 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2023-08-26 12:21:33,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370814270] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 12:21:33,418 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 12:21:33,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 15] total 33 [2023-08-26 12:21:33,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59577916] [2023-08-26 12:21:33,418 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 12:21:33,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-26 12:21:33,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:21:33,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-26 12:21:33,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=308, Invalid=748, Unknown=0, NotChecked=0, Total=1056 [2023-08-26 12:21:33,422 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 168 [2023-08-26 12:21:33,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 229 transitions, 2669 flow. Second operand has 33 states, 33 states have (on average 72.96969696969697) internal successors, (2408), 33 states have internal predecessors, (2408), 0 states have call successors, (0), 0 states 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 12:21:33,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:21:33,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 168 [2023-08-26 12:21:33,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:21:42,110 INFO L124 PetriNetUnfolderBase]: 435/2148 cut-off events. [2023-08-26 12:21:42,111 INFO L125 PetriNetUnfolderBase]: For 186136/186136 co-relation queries the response was YES. [2023-08-26 12:21:42,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12428 conditions, 2148 events. 435/2148 cut-off events. For 186136/186136 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 13445 event pairs, 7 based on Foata normal form. 443/2591 useless extension candidates. Maximal degree in co-relation 12360. Up to 557 conditions per place. [2023-08-26 12:21:42,134 INFO L140 encePairwiseOnDemand]: 161/168 looper letters, 1054 selfloop transitions, 518 changer transitions 0/1573 dead transitions. [2023-08-26 12:21:42,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 1573 transitions, 17904 flow [2023-08-26 12:21:42,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 253 states. [2023-08-26 12:21:42,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2023-08-26 12:21:42,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 19397 transitions. [2023-08-26 12:21:42,161 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4563570487483531 [2023-08-26 12:21:42,161 INFO L72 ComplementDD]: Start complementDD. Operand 253 states and 19397 transitions. [2023-08-26 12:21:42,161 INFO L73 IsDeterministic]: Start isDeterministic. Operand 253 states and 19397 transitions. [2023-08-26 12:21:42,167 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:21:42,167 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 253 states and 19397 transitions. [2023-08-26 12:21:42,194 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 254 states, 253 states have (on average 76.66798418972331) internal successors, (19397), 253 states have internal predecessors, (19397), 0 states have call successors, (0), 0 states 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 12:21:42,262 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 254 states, 254 states have (on average 168.0) internal successors, (42672), 254 states have internal predecessors, (42672), 0 states have call successors, (0), 0 states 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 12:21:42,275 INFO L81 ComplementDD]: Finished complementDD. Result has 254 states, 254 states have (on average 168.0) internal successors, (42672), 254 states have internal predecessors, (42672), 0 states have call successors, (0), 0 states 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 12:21:42,275 INFO L175 Difference]: Start difference. First operand has 166 places, 229 transitions, 2669 flow. Second operand 253 states and 19397 transitions. [2023-08-26 12:21:42,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 1573 transitions, 17904 flow [2023-08-26 12:21:42,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 1573 transitions, 17782 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-26 12:21:42,449 INFO L231 Difference]: Finished difference. Result has 533 places, 559 transitions, 8010 flow [2023-08-26 12:21:42,449 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=2559, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=209, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=253, PETRI_FLOW=8010, PETRI_PLACES=533, PETRI_TRANSITIONS=559} [2023-08-26 12:21:42,450 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 512 predicate places. [2023-08-26 12:21:42,450 INFO L495 AbstractCegarLoop]: Abstraction has has 533 places, 559 transitions, 8010 flow [2023-08-26 12:21:42,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 72.96969696969697) internal successors, (2408), 33 states have internal predecessors, (2408), 0 states have call successors, (0), 0 states 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 12:21:42,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:21:42,451 INFO L208 CegarLoopForPetriNet]: trace histogram [20, 20, 20, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:21:42,464 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-26 12:21:42,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 12:21:42,664 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2023-08-26 12:21:42,664 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:21:42,664 INFO L85 PathProgramCache]: Analyzing trace with hash -1324931022, now seen corresponding path program 6 times [2023-08-26 12:21:42,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:21:42,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286154249] [2023-08-26 12:21:42,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:21:42,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:21:42,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:21:43,102 INFO L134 CoverageAnalysis]: Checked inductivity of 821 backedges. 20 proven. 231 refuted. 0 times theorem prover too weak. 570 trivial. 0 not checked. [2023-08-26 12:21:43,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:21:43,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286154249] [2023-08-26 12:21:43,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286154249] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 12:21:43,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440716183] [2023-08-26 12:21:43,103 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-26 12:21:43,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 12:21:43,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 12:21:43,104 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 12:21:43,131 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 12:21:43,469 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2023-08-26 12:21:43,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 12:21:43,472 INFO L262 TraceCheckSpWp]: Trace formula consists of 631 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-26 12:21:43,476 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 12:21:43,618 INFO L134 CoverageAnalysis]: Checked inductivity of 821 backedges. 20 proven. 231 refuted. 0 times theorem prover too weak. 570 trivial. 0 not checked. [2023-08-26 12:21:43,618 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 12:21:43,896 INFO L134 CoverageAnalysis]: Checked inductivity of 821 backedges. 20 proven. 231 refuted. 0 times theorem prover too weak. 570 trivial. 0 not checked. [2023-08-26 12:21:43,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440716183] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 12:21:43,896 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 12:21:43,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 23 [2023-08-26 12:21:43,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62884141] [2023-08-26 12:21:43,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 12:21:43,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-26 12:21:43,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:21:43,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-26 12:21:43,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2023-08-26 12:21:43,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 168 [2023-08-26 12:21:43,900 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 533 places, 559 transitions, 8010 flow. Second operand has 23 states, 23 states have (on average 81.17391304347827) internal successors, (1867), 23 states have internal predecessors, (1867), 0 states have call successors, (0), 0 states 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 12:21:43,900 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:21:43,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 168 [2023-08-26 12:21:43,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:21:45,627 INFO L124 PetriNetUnfolderBase]: 690/3502 cut-off events. [2023-08-26 12:21:45,628 INFO L125 PetriNetUnfolderBase]: For 1391931/1391931 co-relation queries the response was YES. [2023-08-26 12:21:45,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31800 conditions, 3502 events. 690/3502 cut-off events. For 1391931/1391931 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 23620 event pairs, 47 based on Foata normal form. 387/3889 useless extension candidates. Maximal degree in co-relation 31612. Up to 921 conditions per place. [2023-08-26 12:21:45,680 INFO L140 encePairwiseOnDemand]: 164/168 looper letters, 671 selfloop transitions, 447 changer transitions 0/1119 dead transitions. [2023-08-26 12:21:45,680 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 554 places, 1119 transitions, 22125 flow [2023-08-26 12:21:45,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-26 12:21:45,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-26 12:21:45,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1874 transitions. [2023-08-26 12:21:45,683 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5070346320346321 [2023-08-26 12:21:45,683 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1874 transitions. [2023-08-26 12:21:45,683 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1874 transitions. [2023-08-26 12:21:45,684 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:21:45,684 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1874 transitions. [2023-08-26 12:21:45,686 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 85.18181818181819) internal successors, (1874), 22 states have internal predecessors, (1874), 0 states have call successors, (0), 0 states 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 12:21:45,689 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 168.0) internal successors, (3864), 23 states have internal predecessors, (3864), 0 states have call successors, (0), 0 states 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 12:21:45,690 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 168.0) internal successors, (3864), 23 states have internal predecessors, (3864), 0 states have call successors, (0), 0 states 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 12:21:45,690 INFO L175 Difference]: Start difference. First operand has 533 places, 559 transitions, 8010 flow. Second operand 22 states and 1874 transitions. [2023-08-26 12:21:45,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 554 places, 1119 transitions, 22125 flow [2023-08-26 12:21:47,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 494 places, 1119 transitions, 21087 flow, removed 150 selfloop flow, removed 60 redundant places. [2023-08-26 12:21:47,950 INFO L231 Difference]: Finished difference. Result has 504 places, 733 transitions, 10686 flow [2023-08-26 12:21:47,951 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=7080, PETRI_DIFFERENCE_MINUEND_PLACES=473, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=559, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=273, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=10686, PETRI_PLACES=504, PETRI_TRANSITIONS=733} [2023-08-26 12:21:47,951 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 483 predicate places. [2023-08-26 12:21:47,951 INFO L495 AbstractCegarLoop]: Abstraction has has 504 places, 733 transitions, 10686 flow [2023-08-26 12:21:47,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 81.17391304347827) internal successors, (1867), 23 states have internal predecessors, (1867), 0 states have call successors, (0), 0 states 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 12:21:47,952 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:21:47,952 INFO L208 CegarLoopForPetriNet]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:21:47,957 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 12:21:48,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 12:21:48,153 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2023-08-26 12:21:48,153 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:21:48,153 INFO L85 PathProgramCache]: Analyzing trace with hash -1712674633, now seen corresponding path program 7 times [2023-08-26 12:21:48,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:21:48,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370759961] [2023-08-26 12:21:48,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:21:48,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:21:48,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:21:52,281 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:21:52,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:21:52,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370759961] [2023-08-26 12:21:52,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370759961] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 12:21:52,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992561518] [2023-08-26 12:21:52,282 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-26 12:21:52,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 12:21:52,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 12:21:52,284 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 12:21:52,285 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 12:21:52,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:21:52,509 INFO L262 TraceCheckSpWp]: Trace formula consists of 820 conjuncts, 168 conjunts are in the unsatisfiable core [2023-08-26 12:21:52,514 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 12:21:53,040 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:21:53,040 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 12:21:53,518 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:21:53,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992561518] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 12:21:53,519 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 12:21:53,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61, 61] total 61 [2023-08-26 12:21:53,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755946741] [2023-08-26 12:21:53,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 12:21:53,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2023-08-26 12:21:53,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:21:53,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2023-08-26 12:21:53,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2023-08-26 12:21:53,524 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 168 [2023-08-26 12:21:53,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 504 places, 733 transitions, 10686 flow. Second operand has 63 states, 63 states have (on average 77.34920634920636) internal successors, (4873), 63 states have internal predecessors, (4873), 0 states have call successors, (0), 0 states 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 12:21:53,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:21:53,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 168 [2023-08-26 12:21:53,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:23:50,180 INFO L124 PetriNetUnfolderBase]: 13018/45583 cut-off events. [2023-08-26 12:23:50,181 INFO L125 PetriNetUnfolderBase]: For 44696347/44696347 co-relation queries the response was YES. [2023-08-26 12:23:51,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1009963 conditions, 45583 events. 13018/45583 cut-off events. For 44696347/44696347 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 523952 event pairs, 3201 based on Foata normal form. 1/45584 useless extension candidates. Maximal degree in co-relation 1009765. Up to 12399 conditions per place. [2023-08-26 12:23:51,978 INFO L140 encePairwiseOnDemand]: 163/168 looper letters, 11672 selfloop transitions, 1281 changer transitions 1/12954 dead transitions. [2023-08-26 12:23:51,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1155 places, 12954 transitions, 296338 flow [2023-08-26 12:23:51,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 652 states. [2023-08-26 12:23:51,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 652 states. [2023-08-26 12:23:52,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 652 states to 652 states and 52707 transitions. [2023-08-26 12:23:52,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48118426818580196 [2023-08-26 12:23:52,026 INFO L72 ComplementDD]: Start complementDD. Operand 652 states and 52707 transitions. [2023-08-26 12:23:52,026 INFO L73 IsDeterministic]: Start isDeterministic. Operand 652 states and 52707 transitions. [2023-08-26 12:23:52,042 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:23:52,042 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 652 states and 52707 transitions. [2023-08-26 12:23:52,107 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 653 states, 652 states have (on average 80.83895705521472) internal successors, (52707), 652 states have internal predecessors, (52707), 0 states have call successors, (0), 0 states 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 12:23:52,204 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 653 states, 653 states have (on average 168.0) internal successors, (109704), 653 states have internal predecessors, (109704), 0 states have call successors, (0), 0 states 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 12:23:52,228 INFO L81 ComplementDD]: Finished complementDD. Result has 653 states, 653 states have (on average 168.0) internal successors, (109704), 653 states have internal predecessors, (109704), 0 states have call successors, (0), 0 states 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 12:23:52,228 INFO L175 Difference]: Start difference. First operand has 504 places, 733 transitions, 10686 flow. Second operand 652 states and 52707 transitions. [2023-08-26 12:23:52,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1155 places, 12954 transitions, 296338 flow Received shutdown request... [2023-08-26 12:35:10,550 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-26 12:35:10,550 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 12:35:11,561 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-08-26 12:35:11,564 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 [2023-08-26 12:35:12,379 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr4ASSERT_VIOLATIONASSERT (5 of 6 remaining) [2023-08-26 12:35:12,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-26 12:35:12,380 WARN L619 AbstractCegarLoop]: Verification canceled: while executing RemoveRedundantFlow. [2023-08-26 12:35:12,381 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 6 remaining) [2023-08-26 12:35:12,381 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 6 remaining) [2023-08-26 12:35:12,381 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 6 remaining) [2023-08-26 12:35:12,381 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 6 remaining) [2023-08-26 12:35:12,381 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 6 remaining) [2023-08-26 12:35:12,382 INFO L445 BasicCegarLoop]: Path program histogram: [7, 2, 1, 1, 1, 1] [2023-08-26 12:35:12,385 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-26 12:35:12,385 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-26 12:35:12,387 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 12:35:12 BasicIcfg [2023-08-26 12:35:12,387 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-26 12:35:12,388 INFO L158 Benchmark]: Toolchain (without parser) took 829341.97ms. Allocated memory was 375.4MB in the beginning and 5.1GB in the end (delta: 4.8GB). Free memory was 328.4MB in the beginning and 644.3MB in the end (delta: -315.9MB). Peak memory consumption was 4.6GB. Max. memory is 16.0GB. [2023-08-26 12:35:12,388 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 375.4MB. Free memory was 352.8MB in the beginning and 352.7MB in the end (delta: 94.5kB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 12:35:12,388 INFO L158 Benchmark]: CACSL2BoogieTranslator took 800.52ms. Allocated memory is still 375.4MB. Free memory was 327.3MB in the beginning and 289.6MB in the end (delta: 37.7MB). Peak memory consumption was 37.7MB. Max. memory is 16.0GB. [2023-08-26 12:35:12,388 INFO L158 Benchmark]: Boogie Procedure Inliner took 47.42ms. Allocated memory is still 375.4MB. Free memory was 289.6MB in the beginning and 287.4MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 12:35:12,388 INFO L158 Benchmark]: Boogie Preprocessor took 40.75ms. Allocated memory is still 375.4MB. Free memory was 287.4MB in the beginning and 285.4MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 12:35:12,389 INFO L158 Benchmark]: RCFGBuilder took 319.47ms. Allocated memory is still 375.4MB. Free memory was 285.4MB in the beginning and 269.6MB in the end (delta: 15.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. [2023-08-26 12:35:12,389 INFO L158 Benchmark]: TraceAbstraction took 828128.55ms. Allocated memory was 375.4MB in the beginning and 5.1GB in the end (delta: 4.8GB). Free memory was 269.6MB in the beginning and 644.3MB in the end (delta: -374.7MB). Peak memory consumption was 4.6GB. Max. memory is 16.0GB. [2023-08-26 12:35:12,390 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 375.4MB. Free memory was 352.8MB in the beginning and 352.7MB in the end (delta: 94.5kB). There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 800.52ms. Allocated memory is still 375.4MB. Free memory was 327.3MB in the beginning and 289.6MB in the end (delta: 37.7MB). Peak memory consumption was 37.7MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 47.42ms. Allocated memory is still 375.4MB. Free memory was 289.6MB in the beginning and 287.4MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 40.75ms. Allocated memory is still 375.4MB. Free memory was 287.4MB in the beginning and 285.4MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 319.47ms. Allocated memory is still 375.4MB. Free memory was 285.4MB in the beginning and 269.6MB in the end (delta: 15.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. * TraceAbstraction took 828128.55ms. Allocated memory was 375.4MB in the beginning and 5.1GB in the end (delta: 4.8GB). Free memory was 269.6MB in the beginning and 644.3MB in the end (delta: -374.7MB). Peak memory consumption was 4.6GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResultAtLocation [Line: 245]: Unsoundness Warning unspecified type, defaulting to int C: short [245] - GenericResultAtLocation [Line: 246]: Unsoundness Warning unspecified type, defaulting to int C: short [246] - GenericResultAtLocation [Line: 1102]: Unsoundness Warning unspecified type, defaulting to int C: unsigned short [1102] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.1s, 81 PlacesBefore, 21 PlacesAfterwards, 83 TransitionsBefore, 19 TransitionsAfterwards, 798 CoEnabledTransitionPairs, 6 FixpointIterations, 40 TrivialSequentialCompositions, 25 ConcurrentSequentialCompositions, 2 TrivialYvCompositions, 3 ConcurrentYvCompositions, 4 ChoiceCompositions, 74 TotalNumberOfCompositions, 1058 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 808, independent: 749, independent conditional: 0, independent unconditional: 749, dependent: 59, dependent conditional: 0, dependent unconditional: 59, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 410, independent: 399, independent conditional: 0, independent unconditional: 399, dependent: 11, dependent conditional: 0, dependent unconditional: 11, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 808, independent: 350, independent conditional: 0, independent unconditional: 350, dependent: 48, dependent conditional: 0, dependent unconditional: 48, unknown: 410, unknown conditional: 0, unknown unconditional: 410] , Statistics on independence cache: Total cache size (in pairs): 30, Positive cache size: 25, Positive conditional cache size: 0, Positive unconditional cache size: 25, Negative cache size: 5, Negative conditional cache size: 0, Negative unconditional cache size: 5, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 12]: 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: 1343]: 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 3 procedures, 106 locations, 6 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: 828.0s, OverallIterations: 13, TraceHistogramMax: 20, PathProgramHistogramMax: 7, EmptinessCheckTime: 0.0s, AutomataDifference: 814.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.2s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 7342 SdHoareTripleChecker+Valid, 68.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 7342 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 57.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 59 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 222926 IncrementalHoareTripleChecker+Invalid, 222985 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 59 mSolverCounterUnsat, 0 mSDtfsCounter, 222926 mSolverCounterSat, 0.9s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2164 GetRequests, 1128 SyntacticMatches, 15 SemanticMatches, 1021 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199736 ImplicationChecksByTransitivity, 27.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=10686occurred in iteration=12, InterpolantAutomatonStates: 385, 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: 0.2s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 8.1s InterpolantComputationTime, 1057 NumberOfCodeBlocks, 1039 NumberOfCodeBlocksAsserted, 58 NumberOfCheckSat, 1503 ConstructedInterpolants, 0 QuantifiedInterpolants, 5931 SizeOfPredicates, 40 NumberOfNonLiveVariables, 2827 ConjunctsInSsa, 219 ConjunctsInUnsatCore, 28 InterpolantComputations, 6 PerfectInterpolantSequences, 3176/8808 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