/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.order.of.the.error.locations.to.be.checked PROGRAM_FIRST -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/stateful01-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 17:42:33,542 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 17:42:33,627 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 17:42:33,632 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 17:42:33,633 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 17:42:33,661 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 17:42:33,662 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 17:42:33,662 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 17:42:33,663 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 17:42:33,667 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 17:42:33,667 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 17:42:33,667 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 17:42:33,667 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 17:42:33,669 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 17:42:33,669 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 17:42:33,669 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 17:42:33,669 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 17:42:33,670 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 17:42:33,670 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 17:42:33,670 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 17:42:33,670 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 17:42:33,670 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 17:42:33,671 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 17:42:33,671 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 17:42:33,671 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 17:42:33,672 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 17:42:33,672 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 17:42:33,672 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 17:42:33,672 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 17:42:33,673 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 17:42:33,674 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 17:42:33,674 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 17:42:33,674 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 17:42:33,674 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 17:42:33,674 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 17:42:33,675 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 17:42:33,993 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 17:42:34,018 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 17:42:34,021 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 17:42:34,022 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 17:42:34,022 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 17:42:34,023 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/stateful01-2.i [2023-08-26 17:42:35,114 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 17:42:35,377 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 17:42:35,378 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/stateful01-2.i [2023-08-26 17:42:35,402 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/639a943e2/af2cd049930c46449bf4e9f4af3b12f2/FLAGef3fc9e9a [2023-08-26 17:42:35,418 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/639a943e2/af2cd049930c46449bf4e9f4af3b12f2 [2023-08-26 17:42:35,420 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 17:42:35,420 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 17:42:35,421 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 17:42:35,422 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 17:42:35,423 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 17:42:35,424 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 05:42:35" (1/1) ... [2023-08-26 17:42:35,424 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44a23d3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:42:35, skipping insertion in model container [2023-08-26 17:42:35,425 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 05:42:35" (1/1) ... [2023-08-26 17:42:35,466 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 17:42:35,793 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 17:42:35,806 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 17:42:35,834 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [257] [2023-08-26 17:42:35,835 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [257] [2023-08-26 17:42:35,862 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 17:42:35,901 INFO L206 MainTranslator]: Completed translation [2023-08-26 17:42:35,901 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:42:35 WrapperNode [2023-08-26 17:42:35,902 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 17:42:35,903 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 17:42:35,903 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 17:42:35,903 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 17:42:35,909 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:42:35" (1/1) ... [2023-08-26 17:42:35,935 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:42:35" (1/1) ... [2023-08-26 17:42:35,959 INFO L138 Inliner]: procedures = 168, calls = 35, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 66 [2023-08-26 17:42:35,960 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 17:42:35,961 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 17:42:35,961 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 17:42:35,961 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 17:42:35,969 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:42:35" (1/1) ... [2023-08-26 17:42:35,969 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:42:35" (1/1) ... [2023-08-26 17:42:35,981 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:42:35" (1/1) ... [2023-08-26 17:42:35,982 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:42:35" (1/1) ... [2023-08-26 17:42:35,991 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:42:35" (1/1) ... [2023-08-26 17:42:35,992 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:42:35" (1/1) ... [2023-08-26 17:42:35,993 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:42:35" (1/1) ... [2023-08-26 17:42:35,994 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:42:35" (1/1) ... [2023-08-26 17:42:35,996 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 17:42:35,997 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 17:42:35,997 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 17:42:35,997 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 17:42:35,998 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:42:35" (1/1) ... [2023-08-26 17:42:36,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 17:42:36,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 17:42:36,030 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 17:42:36,065 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 17:42:36,073 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-26 17:42:36,073 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-26 17:42:36,074 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-26 17:42:36,074 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-26 17:42:36,074 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-26 17:42:36,074 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 17:42:36,074 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-26 17:42:36,074 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 17:42:36,074 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 17:42:36,075 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 17:42:36,075 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 17:42:36,075 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 17:42:36,075 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 17:42:36,076 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 17:42:36,214 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 17:42:36,215 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 17:42:36,448 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 17:42:36,454 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 17:42:36,455 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-08-26 17:42:36,456 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 05:42:36 BoogieIcfgContainer [2023-08-26 17:42:36,457 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 17:42:36,461 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 17:42:36,461 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 17:42:36,467 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 17:42:36,467 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 05:42:35" (1/3) ... [2023-08-26 17:42:36,467 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52b2d0b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 05:42:36, skipping insertion in model container [2023-08-26 17:42:36,468 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:42:35" (2/3) ... [2023-08-26 17:42:36,468 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52b2d0b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 05:42:36, skipping insertion in model container [2023-08-26 17:42:36,468 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 05:42:36" (3/3) ... [2023-08-26 17:42:36,469 INFO L112 eAbstractionObserver]: Analyzing ICFG stateful01-2.i [2023-08-26 17:42:36,487 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 17:42:36,487 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 9 error locations. [2023-08-26 17:42:36,487 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 17:42:36,570 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-26 17:42:36,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 106 places, 101 transitions, 218 flow [2023-08-26 17:42:36,690 INFO L124 PetriNetUnfolderBase]: 2/99 cut-off events. [2023-08-26 17:42:36,690 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 17:42:36,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108 conditions, 99 events. 2/99 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 90 event pairs, 0 based on Foata normal form. 0/88 useless extension candidates. Maximal degree in co-relation 34. Up to 2 conditions per place. [2023-08-26 17:42:36,694 INFO L82 GeneralOperation]: Start removeDead. Operand has 106 places, 101 transitions, 218 flow [2023-08-26 17:42:36,699 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 94 places, 87 transitions, 186 flow [2023-08-26 17:42:36,703 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 17:42:36,717 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 94 places, 87 transitions, 186 flow [2023-08-26 17:42:36,720 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 94 places, 87 transitions, 186 flow [2023-08-26 17:42:36,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 94 places, 87 transitions, 186 flow [2023-08-26 17:42:36,749 INFO L124 PetriNetUnfolderBase]: 0/87 cut-off events. [2023-08-26 17:42:36,749 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 17:42:36,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96 conditions, 87 events. 0/87 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 73 event pairs, 0 based on Foata normal form. 0/79 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2023-08-26 17:42:36,752 INFO L119 LiptonReduction]: Number of co-enabled transitions 940 [2023-08-26 17:42:40,162 INFO L134 LiptonReduction]: Checked pairs total: 3284 [2023-08-26 17:42:40,163 INFO L136 LiptonReduction]: Total number of compositions: 78 [2023-08-26 17:42:40,174 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 17:42:40,179 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;@66556670, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 17:42:40,180 INFO L358 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2023-08-26 17:42:40,181 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 17:42:40,182 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2023-08-26 17:42:40,182 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 17:42:40,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:42:40,182 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-26 17:42:40,183 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 17:42:40,187 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:42:40,187 INFO L85 PathProgramCache]: Analyzing trace with hash 347, now seen corresponding path program 1 times [2023-08-26 17:42:40,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:42:40,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730732072] [2023-08-26 17:42:40,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:42:40,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:42:40,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:42:40,285 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 17:42:40,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:42:40,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730732072] [2023-08-26 17:42:40,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730732072] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:42:40,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:42:40,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-26 17:42:40,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208617259] [2023-08-26 17:42:40,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:42:40,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 17:42:40,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:42:40,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 17:42:40,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 17:42:40,318 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 179 [2023-08-26 17:42:40,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 31 transitions, 74 flow. Second operand has 2 states, 2 states have (on average 94.5) internal successors, (189), 2 states have internal predecessors, (189), 0 states have call successors, (0), 0 states 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 17:42:40,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:42:40,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 179 [2023-08-26 17:42:40,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:42:40,429 INFO L124 PetriNetUnfolderBase]: 203/426 cut-off events. [2023-08-26 17:42:40,430 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2023-08-26 17:42:40,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 820 conditions, 426 events. 203/426 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1943 event pairs, 203 based on Foata normal form. 0/335 useless extension candidates. Maximal degree in co-relation 728. Up to 371 conditions per place. [2023-08-26 17:42:40,436 INFO L140 encePairwiseOnDemand]: 177/179 looper letters, 24 selfloop transitions, 0 changer transitions 0/29 dead transitions. [2023-08-26 17:42:40,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 29 transitions, 118 flow [2023-08-26 17:42:40,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 17:42:40,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 17:42:40,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 214 transitions. [2023-08-26 17:42:40,449 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5977653631284916 [2023-08-26 17:42:40,450 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 214 transitions. [2023-08-26 17:42:40,450 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 214 transitions. [2023-08-26 17:42:40,451 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:42:40,453 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 214 transitions. [2023-08-26 17:42:40,456 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 107.0) internal successors, (214), 2 states have internal predecessors, (214), 0 states have call successors, (0), 0 states 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 17:42:40,459 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 179.0) internal successors, (537), 3 states have internal predecessors, (537), 0 states have call successors, (0), 0 states 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 17:42:40,460 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 179.0) internal successors, (537), 3 states have internal predecessors, (537), 0 states have call successors, (0), 0 states 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 17:42:40,461 INFO L175 Difference]: Start difference. First operand has 38 places, 31 transitions, 74 flow. Second operand 2 states and 214 transitions. [2023-08-26 17:42:40,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 29 transitions, 118 flow [2023-08-26 17:42:40,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 29 transitions, 110 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-26 17:42:40,465 INFO L231 Difference]: Finished difference. Result has 33 places, 29 transitions, 62 flow [2023-08-26 17:42:40,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=62, PETRI_PLACES=33, PETRI_TRANSITIONS=29} [2023-08-26 17:42:40,469 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -5 predicate places. [2023-08-26 17:42:40,469 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 29 transitions, 62 flow [2023-08-26 17:42:40,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 94.5) internal successors, (189), 2 states have internal predecessors, (189), 0 states have call successors, (0), 0 states 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 17:42:40,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:42:40,470 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 17:42:40,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 17:42:40,470 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 17:42:40,471 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:42:40,471 INFO L85 PathProgramCache]: Analyzing trace with hash 343071, now seen corresponding path program 1 times [2023-08-26 17:42:40,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:42:40,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472293814] [2023-08-26 17:42:40,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:42:40,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:42:40,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:42:40,718 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 17:42:40,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:42:40,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472293814] [2023-08-26 17:42:40,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472293814] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:42:40,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:42:40,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 17:42:40,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006929067] [2023-08-26 17:42:40,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:42:40,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 17:42:40,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:42:40,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 17:42:40,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 17:42:40,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 179 [2023-08-26 17:42:40,722 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 29 transitions, 62 flow. Second operand has 3 states, 3 states have (on average 76.0) internal successors, (228), 3 states have internal predecessors, (228), 0 states have call successors, (0), 0 states 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 17:42:40,722 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:42:40,722 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 179 [2023-08-26 17:42:40,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:42:40,781 INFO L124 PetriNetUnfolderBase]: 194/403 cut-off events. [2023-08-26 17:42:40,782 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 17:42:40,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 763 conditions, 403 events. 194/403 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1811 event pairs, 194 based on Foata normal form. 0/323 useless extension candidates. Maximal degree in co-relation 760. Up to 350 conditions per place. [2023-08-26 17:42:40,785 INFO L140 encePairwiseOnDemand]: 176/179 looper letters, 21 selfloop transitions, 1 changer transitions 0/27 dead transitions. [2023-08-26 17:42:40,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 27 transitions, 102 flow [2023-08-26 17:42:40,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 17:42:40,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 17:42:40,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 249 transitions. [2023-08-26 17:42:40,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46368715083798884 [2023-08-26 17:42:40,787 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 249 transitions. [2023-08-26 17:42:40,787 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 249 transitions. [2023-08-26 17:42:40,788 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:42:40,788 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 249 transitions. [2023-08-26 17:42:40,801 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 83.0) internal successors, (249), 3 states have internal predecessors, (249), 0 states have call successors, (0), 0 states 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 17:42:40,803 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 179.0) internal successors, (716), 4 states have internal predecessors, (716), 0 states have call successors, (0), 0 states 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 17:42:40,803 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 179.0) internal successors, (716), 4 states have internal predecessors, (716), 0 states have call successors, (0), 0 states 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 17:42:40,803 INFO L175 Difference]: Start difference. First operand has 33 places, 29 transitions, 62 flow. Second operand 3 states and 249 transitions. [2023-08-26 17:42:40,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 27 transitions, 102 flow [2023-08-26 17:42:40,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 27 transitions, 102 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 17:42:40,804 INFO L231 Difference]: Finished difference. Result has 33 places, 27 transitions, 60 flow [2023-08-26 17:42:40,805 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=60, PETRI_PLACES=33, PETRI_TRANSITIONS=27} [2023-08-26 17:42:40,805 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -5 predicate places. [2023-08-26 17:42:40,806 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 27 transitions, 60 flow [2023-08-26 17:42:40,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.0) internal successors, (228), 3 states have internal predecessors, (228), 0 states have call successors, (0), 0 states 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 17:42:40,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:42:40,806 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 17:42:40,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 17:42:40,806 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 17:42:40,807 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:42:40,807 INFO L85 PathProgramCache]: Analyzing trace with hash 343070, now seen corresponding path program 1 times [2023-08-26 17:42:40,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:42:40,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861944654] [2023-08-26 17:42:40,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:42:40,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:42:40,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:42:40,881 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 17:42:40,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:42:40,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861944654] [2023-08-26 17:42:40,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861944654] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:42:40,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:42:40,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 17:42:40,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828033489] [2023-08-26 17:42:40,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:42:40,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 17:42:40,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:42:40,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 17:42:40,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 17:42:40,884 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 179 [2023-08-26 17:42:40,884 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 27 transitions, 60 flow. Second operand has 3 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 17:42:40,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:42:40,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 179 [2023-08-26 17:42:40,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:42:40,942 INFO L124 PetriNetUnfolderBase]: 185/380 cut-off events. [2023-08-26 17:42:40,943 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 17:42:40,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 722 conditions, 380 events. 185/380 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1695 event pairs, 185 based on Foata normal form. 0/311 useless extension candidates. Maximal degree in co-relation 718. Up to 330 conditions per place. [2023-08-26 17:42:40,947 INFO L140 encePairwiseOnDemand]: 176/179 looper letters, 19 selfloop transitions, 1 changer transitions 0/25 dead transitions. [2023-08-26 17:42:40,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 25 transitions, 96 flow [2023-08-26 17:42:40,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 17:42:40,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 17:42:40,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 241 transitions. [2023-08-26 17:42:40,950 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44878957169459965 [2023-08-26 17:42:40,950 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 241 transitions. [2023-08-26 17:42:40,950 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 241 transitions. [2023-08-26 17:42:40,950 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:42:40,951 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 241 transitions. [2023-08-26 17:42:40,952 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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 17:42:40,954 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 179.0) internal successors, (716), 4 states have internal predecessors, (716), 0 states have call successors, (0), 0 states 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 17:42:40,954 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 179.0) internal successors, (716), 4 states have internal predecessors, (716), 0 states have call successors, (0), 0 states 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 17:42:40,955 INFO L175 Difference]: Start difference. First operand has 33 places, 27 transitions, 60 flow. Second operand 3 states and 241 transitions. [2023-08-26 17:42:40,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 25 transitions, 96 flow [2023-08-26 17:42:40,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 25 transitions, 95 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 17:42:40,956 INFO L231 Difference]: Finished difference. Result has 32 places, 25 transitions, 57 flow [2023-08-26 17:42:40,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=55, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=57, PETRI_PLACES=32, PETRI_TRANSITIONS=25} [2023-08-26 17:42:40,958 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -6 predicate places. [2023-08-26 17:42:40,960 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 25 transitions, 57 flow [2023-08-26 17:42:40,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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 17:42:40,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:42:40,961 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 17:42:40,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 17:42:40,961 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 17:42:40,961 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:42:40,962 INFO L85 PathProgramCache]: Analyzing trace with hash 329696906, now seen corresponding path program 1 times [2023-08-26 17:42:40,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:42:40,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125224477] [2023-08-26 17:42:40,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:42:40,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:42:40,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:42:41,099 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 17:42:41,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:42:41,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125224477] [2023-08-26 17:42:41,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125224477] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:42:41,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:42:41,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 17:42:41,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354455956] [2023-08-26 17:42:41,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:42:41,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 17:42:41,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:42:41,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 17:42:41,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 17:42:41,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 179 [2023-08-26 17:42:41,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 25 transitions, 57 flow. Second operand has 3 states, 3 states have (on average 76.66666666666667) internal successors, (230), 3 states have internal predecessors, (230), 0 states have call successors, (0), 0 states 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 17:42:41,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:42:41,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 179 [2023-08-26 17:42:41,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:42:41,156 INFO L124 PetriNetUnfolderBase]: 136/290 cut-off events. [2023-08-26 17:42:41,156 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 17:42:41,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 554 conditions, 290 events. 136/290 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1183 event pairs, 136 based on Foata normal form. 0/253 useless extension candidates. Maximal degree in co-relation 550. Up to 251 conditions per place. [2023-08-26 17:42:41,159 INFO L140 encePairwiseOnDemand]: 177/179 looper letters, 18 selfloop transitions, 1 changer transitions 0/24 dead transitions. [2023-08-26 17:42:41,159 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 24 transitions, 93 flow [2023-08-26 17:42:41,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 17:42:41,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 17:42:41,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 245 transitions. [2023-08-26 17:42:41,160 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45623836126629425 [2023-08-26 17:42:41,160 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 245 transitions. [2023-08-26 17:42:41,160 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 245 transitions. [2023-08-26 17:42:41,161 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:42:41,161 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 245 transitions. [2023-08-26 17:42:41,162 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 81.66666666666667) internal successors, (245), 3 states have internal predecessors, (245), 0 states have call successors, (0), 0 states 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 17:42:41,163 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 179.0) internal successors, (716), 4 states have internal predecessors, (716), 0 states have call successors, (0), 0 states 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 17:42:41,163 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 179.0) internal successors, (716), 4 states have internal predecessors, (716), 0 states have call successors, (0), 0 states 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 17:42:41,163 INFO L175 Difference]: Start difference. First operand has 32 places, 25 transitions, 57 flow. Second operand 3 states and 245 transitions. [2023-08-26 17:42:41,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 24 transitions, 93 flow [2023-08-26 17:42:41,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 24 transitions, 92 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 17:42:41,164 INFO L231 Difference]: Finished difference. Result has 32 places, 24 transitions, 56 flow [2023-08-26 17:42:41,164 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=56, PETRI_PLACES=32, PETRI_TRANSITIONS=24} [2023-08-26 17:42:41,166 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -6 predicate places. [2023-08-26 17:42:41,166 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 24 transitions, 56 flow [2023-08-26 17:42:41,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.66666666666667) internal successors, (230), 3 states have internal predecessors, (230), 0 states have call successors, (0), 0 states 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 17:42:41,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:42:41,166 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 17:42:41,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 17:42:41,167 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 17:42:41,167 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:42:41,167 INFO L85 PathProgramCache]: Analyzing trace with hash 329696904, now seen corresponding path program 1 times [2023-08-26 17:42:41,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:42:41,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595462015] [2023-08-26 17:42:41,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:42:41,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:42:41,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:42:41,241 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 17:42:41,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:42:41,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595462015] [2023-08-26 17:42:41,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595462015] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:42:41,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:42:41,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 17:42:41,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442754995] [2023-08-26 17:42:41,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:42:41,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 17:42:41,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:42:41,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 17:42:41,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 17:42:41,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 179 [2023-08-26 17:42:41,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 24 transitions, 56 flow. Second operand has 4 states, 4 states have (on average 71.25) internal successors, (285), 4 states have internal predecessors, (285), 0 states have call successors, (0), 0 states 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 17:42:41,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:42:41,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 179 [2023-08-26 17:42:41,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:42:41,292 INFO L124 PetriNetUnfolderBase]: 87/200 cut-off events. [2023-08-26 17:42:41,292 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 17:42:41,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 386 conditions, 200 events. 87/200 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 734 event pairs, 87 based on Foata normal form. 0/195 useless extension candidates. Maximal degree in co-relation 382. Up to 172 conditions per place. [2023-08-26 17:42:41,297 INFO L140 encePairwiseOnDemand]: 177/179 looper letters, 17 selfloop transitions, 1 changer transitions 0/23 dead transitions. [2023-08-26 17:42:41,297 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 23 transitions, 90 flow [2023-08-26 17:42:41,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 17:42:41,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 17:42:41,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 229 transitions. [2023-08-26 17:42:41,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4264432029795158 [2023-08-26 17:42:41,299 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 229 transitions. [2023-08-26 17:42:41,299 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 229 transitions. [2023-08-26 17:42:41,299 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:42:41,300 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 229 transitions. [2023-08-26 17:42:41,301 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 76.33333333333333) internal successors, (229), 3 states have internal predecessors, (229), 0 states have call successors, (0), 0 states 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 17:42:41,302 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 179.0) internal successors, (716), 4 states have internal predecessors, (716), 0 states have call successors, (0), 0 states 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 17:42:41,302 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 179.0) internal successors, (716), 4 states have internal predecessors, (716), 0 states have call successors, (0), 0 states 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 17:42:41,302 INFO L175 Difference]: Start difference. First operand has 32 places, 24 transitions, 56 flow. Second operand 3 states and 229 transitions. [2023-08-26 17:42:41,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 23 transitions, 90 flow [2023-08-26 17:42:41,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 23 transitions, 89 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 17:42:41,304 INFO L231 Difference]: Finished difference. Result has 32 places, 23 transitions, 55 flow [2023-08-26 17:42:41,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=53, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=55, PETRI_PLACES=32, PETRI_TRANSITIONS=23} [2023-08-26 17:42:41,306 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -6 predicate places. [2023-08-26 17:42:41,306 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 23 transitions, 55 flow [2023-08-26 17:42:41,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 71.25) internal successors, (285), 4 states have internal predecessors, (285), 0 states have call successors, (0), 0 states 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 17:42:41,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:42:41,307 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:42:41,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 17:42:41,307 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 17:42:41,307 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:42:41,307 INFO L85 PathProgramCache]: Analyzing trace with hash 1381102061, now seen corresponding path program 1 times [2023-08-26 17:42:41,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:42:41,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036949611] [2023-08-26 17:42:41,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:42:41,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:42:41,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:42:41,493 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 17:42:41,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:42:41,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036949611] [2023-08-26 17:42:41,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036949611] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:42:41,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:42:41,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 17:42:41,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029403870] [2023-08-26 17:42:41,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:42:41,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 17:42:41,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:42:41,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 17:42:41,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-08-26 17:42:41,500 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 179 [2023-08-26 17:42:41,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 23 transitions, 55 flow. Second operand has 6 states, 6 states have (on average 89.33333333333333) internal successors, (536), 6 states have internal predecessors, (536), 0 states have call successors, (0), 0 states 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 17:42:41,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:42:41,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 179 [2023-08-26 17:42:41,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:42:41,682 INFO L124 PetriNetUnfolderBase]: 190/434 cut-off events. [2023-08-26 17:42:41,682 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-26 17:42:41,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 831 conditions, 434 events. 190/434 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 2164 event pairs, 35 based on Foata normal form. 1/433 useless extension candidates. Maximal degree in co-relation 827. Up to 118 conditions per place. [2023-08-26 17:42:41,685 INFO L140 encePairwiseOnDemand]: 173/179 looper letters, 40 selfloop transitions, 6 changer transitions 22/71 dead transitions. [2023-08-26 17:42:41,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 71 transitions, 294 flow [2023-08-26 17:42:41,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-26 17:42:41,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-26 17:42:41,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 843 transitions. [2023-08-26 17:42:41,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5232774674115456 [2023-08-26 17:42:41,687 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 843 transitions. [2023-08-26 17:42:41,687 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 843 transitions. [2023-08-26 17:42:41,688 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:42:41,688 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 843 transitions. [2023-08-26 17:42:41,690 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 93.66666666666667) internal successors, (843), 9 states have internal predecessors, (843), 0 states have call successors, (0), 0 states 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 17:42:41,693 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 179.0) internal successors, (1790), 10 states have internal predecessors, (1790), 0 states have call successors, (0), 0 states 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 17:42:41,693 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 179.0) internal successors, (1790), 10 states have internal predecessors, (1790), 0 states have call successors, (0), 0 states 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 17:42:41,693 INFO L175 Difference]: Start difference. First operand has 32 places, 23 transitions, 55 flow. Second operand 9 states and 843 transitions. [2023-08-26 17:42:41,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 71 transitions, 294 flow [2023-08-26 17:42:41,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 71 transitions, 293 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 17:42:41,695 INFO L231 Difference]: Finished difference. Result has 45 places, 27 transitions, 95 flow [2023-08-26 17:42:41,696 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=95, PETRI_PLACES=45, PETRI_TRANSITIONS=27} [2023-08-26 17:42:41,698 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 7 predicate places. [2023-08-26 17:42:41,698 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 27 transitions, 95 flow [2023-08-26 17:42:41,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 89.33333333333333) internal successors, (536), 6 states have internal predecessors, (536), 0 states have call successors, (0), 0 states 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 17:42:41,699 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:42:41,699 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:42:41,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 17:42:41,700 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 17:42:41,700 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:42:41,700 INFO L85 PathProgramCache]: Analyzing trace with hash 1926199299, now seen corresponding path program 2 times [2023-08-26 17:42:41,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:42:41,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145760227] [2023-08-26 17:42:41,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:42:41,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:42:41,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:42:41,796 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 17:42:41,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:42:41,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145760227] [2023-08-26 17:42:41,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145760227] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:42:41,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:42:41,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 17:42:41,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841453015] [2023-08-26 17:42:41,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:42:41,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 17:42:41,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:42:41,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 17:42:41,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 17:42:41,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 179 [2023-08-26 17:42:41,798 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 27 transitions, 95 flow. Second operand has 3 states, 3 states have (on average 84.33333333333333) internal successors, (253), 3 states have internal predecessors, (253), 0 states have call successors, (0), 0 states 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 17:42:41,798 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:42:41,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 179 [2023-08-26 17:42:41,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:42:41,846 INFO L124 PetriNetUnfolderBase]: 28/103 cut-off events. [2023-08-26 17:42:41,846 INFO L125 PetriNetUnfolderBase]: For 21/21 co-relation queries the response was YES. [2023-08-26 17:42:41,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 233 conditions, 103 events. 28/103 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 268 event pairs, 12 based on Foata normal form. 16/119 useless extension candidates. Maximal degree in co-relation 223. Up to 44 conditions per place. [2023-08-26 17:42:41,847 INFO L140 encePairwiseOnDemand]: 171/179 looper letters, 14 selfloop transitions, 8 changer transitions 3/29 dead transitions. [2023-08-26 17:42:41,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 29 transitions, 138 flow [2023-08-26 17:42:41,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 17:42:41,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 17:42:41,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 262 transitions. [2023-08-26 17:42:41,849 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48789571694599626 [2023-08-26 17:42:41,849 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 262 transitions. [2023-08-26 17:42:41,849 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 262 transitions. [2023-08-26 17:42:41,849 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:42:41,849 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 262 transitions. [2023-08-26 17:42:41,850 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 87.33333333333333) internal successors, (262), 3 states have internal predecessors, (262), 0 states have call successors, (0), 0 states 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 17:42:41,852 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 179.0) internal successors, (716), 4 states have internal predecessors, (716), 0 states have call successors, (0), 0 states 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 17:42:41,852 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 179.0) internal successors, (716), 4 states have internal predecessors, (716), 0 states have call successors, (0), 0 states 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 17:42:41,852 INFO L175 Difference]: Start difference. First operand has 45 places, 27 transitions, 95 flow. Second operand 3 states and 262 transitions. [2023-08-26 17:42:41,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 29 transitions, 138 flow [2023-08-26 17:42:41,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 29 transitions, 128 flow, removed 4 selfloop flow, removed 5 redundant places. [2023-08-26 17:42:41,856 INFO L231 Difference]: Finished difference. Result has 37 places, 23 transitions, 78 flow [2023-08-26 17:42:41,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=78, PETRI_PLACES=37, PETRI_TRANSITIONS=23} [2023-08-26 17:42:41,857 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -1 predicate places. [2023-08-26 17:42:41,857 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 23 transitions, 78 flow [2023-08-26 17:42:41,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.33333333333333) internal successors, (253), 3 states have internal predecessors, (253), 0 states have call successors, (0), 0 states 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 17:42:41,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:42:41,857 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:42:41,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 17:42:41,858 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 17:42:41,859 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:42:41,859 INFO L85 PathProgramCache]: Analyzing trace with hash -1432132271, now seen corresponding path program 3 times [2023-08-26 17:42:41,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:42:41,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936362550] [2023-08-26 17:42:41,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:42:41,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:42:41,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:42:42,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:42:42,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:42:42,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936362550] [2023-08-26 17:42:42,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936362550] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:42:42,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:42:42,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 17:42:42,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717353080] [2023-08-26 17:42:42,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:42:42,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 17:42:42,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:42:42,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 17:42:42,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-08-26 17:42:42,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 179 [2023-08-26 17:42:42,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 23 transitions, 78 flow. Second operand has 6 states, 6 states have (on average 89.33333333333333) internal successors, (536), 6 states have internal predecessors, (536), 0 states have call successors, (0), 0 states 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 17:42:42,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:42:42,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 179 [2023-08-26 17:42:42,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:42:42,101 INFO L124 PetriNetUnfolderBase]: 31/99 cut-off events. [2023-08-26 17:42:42,101 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2023-08-26 17:42:42,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 250 conditions, 99 events. 31/99 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 225 event pairs, 6 based on Foata normal form. 1/100 useless extension candidates. Maximal degree in co-relation 244. Up to 45 conditions per place. [2023-08-26 17:42:42,102 INFO L140 encePairwiseOnDemand]: 173/179 looper letters, 0 selfloop transitions, 0 changer transitions 29/29 dead transitions. [2023-08-26 17:42:42,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 29 transitions, 148 flow [2023-08-26 17:42:42,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 17:42:42,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 17:42:42,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 629 transitions. [2023-08-26 17:42:42,104 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5019952114924182 [2023-08-26 17:42:42,104 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 629 transitions. [2023-08-26 17:42:42,104 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 629 transitions. [2023-08-26 17:42:42,105 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:42:42,105 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 629 transitions. [2023-08-26 17:42:42,106 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 89.85714285714286) internal successors, (629), 7 states have internal predecessors, (629), 0 states have call successors, (0), 0 states 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 17:42:42,108 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 179.0) internal successors, (1432), 8 states have internal predecessors, (1432), 0 states have call successors, (0), 0 states 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 17:42:42,108 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 179.0) internal successors, (1432), 8 states have internal predecessors, (1432), 0 states have call successors, (0), 0 states 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 17:42:42,108 INFO L175 Difference]: Start difference. First operand has 37 places, 23 transitions, 78 flow. Second operand 7 states and 629 transitions. [2023-08-26 17:42:42,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 29 transitions, 148 flow [2023-08-26 17:42:42,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 29 transitions, 133 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-26 17:42:42,110 INFO L231 Difference]: Finished difference. Result has 38 places, 0 transitions, 0 flow [2023-08-26 17:42:42,111 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=0, PETRI_PLACES=38, PETRI_TRANSITIONS=0} [2023-08-26 17:42:42,112 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 0 predicate places. [2023-08-26 17:42:42,112 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 0 transitions, 0 flow [2023-08-26 17:42:42,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 89.33333333333333) internal successors, (536), 6 states have internal predecessors, (536), 0 states have call successors, (0), 0 states 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 17:42:42,117 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 11 remaining) [2023-08-26 17:42:42,118 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 11 remaining) [2023-08-26 17:42:42,118 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 11 remaining) [2023-08-26 17:42:42,118 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 11 remaining) [2023-08-26 17:42:42,118 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 11 remaining) [2023-08-26 17:42:42,118 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 11 remaining) [2023-08-26 17:42:42,119 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 11 remaining) [2023-08-26 17:42:42,119 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 11 remaining) [2023-08-26 17:42:42,119 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8ASSERT_VIOLATIONASSERT (2 of 11 remaining) [2023-08-26 17:42:42,119 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 11 remaining) [2023-08-26 17:42:42,119 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 11 remaining) [2023-08-26 17:42:42,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-26 17:42:42,119 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1, 1] [2023-08-26 17:42:42,126 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-26 17:42:42,126 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-26 17:42:42,133 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 05:42:42 BasicIcfg [2023-08-26 17:42:42,133 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-26 17:42:42,134 INFO L158 Benchmark]: Toolchain (without parser) took 6713.39ms. Allocated memory was 352.3MB in the beginning and 463.5MB in the end (delta: 111.1MB). Free memory was 327.5MB in the beginning and 400.1MB in the end (delta: -72.6MB). Peak memory consumption was 40.1MB. Max. memory is 16.0GB. [2023-08-26 17:42:42,134 INFO L158 Benchmark]: CDTParser took 0.45ms. Allocated memory is still 352.3MB. Free memory is still 329.0MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 17:42:42,134 INFO L158 Benchmark]: CACSL2BoogieTranslator took 480.49ms. Allocated memory is still 352.3MB. Free memory was 327.5MB in the beginning and 307.7MB in the end (delta: 19.8MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. [2023-08-26 17:42:42,135 INFO L158 Benchmark]: Boogie Procedure Inliner took 57.06ms. Allocated memory is still 352.3MB. Free memory was 307.7MB in the beginning and 305.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 17:42:42,135 INFO L158 Benchmark]: Boogie Preprocessor took 35.69ms. Allocated memory is still 352.3MB. Free memory was 305.6MB in the beginning and 304.4MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 17:42:42,135 INFO L158 Benchmark]: RCFGBuilder took 459.74ms. Allocated memory is still 352.3MB. Free memory was 304.4MB in the beginning and 288.8MB in the end (delta: 15.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. [2023-08-26 17:42:42,135 INFO L158 Benchmark]: TraceAbstraction took 5672.63ms. Allocated memory was 352.3MB in the beginning and 463.5MB in the end (delta: 111.1MB). Free memory was 288.1MB in the beginning and 400.1MB in the end (delta: -112.0MB). Peak memory consumption was 2.3MB. Max. memory is 16.0GB. [2023-08-26 17:42:42,137 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.45ms. Allocated memory is still 352.3MB. Free memory is still 329.0MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 480.49ms. Allocated memory is still 352.3MB. Free memory was 327.5MB in the beginning and 307.7MB in the end (delta: 19.8MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 57.06ms. Allocated memory is still 352.3MB. Free memory was 307.7MB in the beginning and 305.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 35.69ms. Allocated memory is still 352.3MB. Free memory was 305.6MB in the beginning and 304.4MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 459.74ms. Allocated memory is still 352.3MB. Free memory was 304.4MB in the beginning and 288.8MB in the end (delta: 15.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. * TraceAbstraction took 5672.63ms. Allocated memory was 352.3MB in the beginning and 463.5MB in the end (delta: 111.1MB). Free memory was 288.1MB in the beginning and 400.1MB in the end (delta: -112.0MB). Peak memory consumption was 2.3MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResultAtLocation [Line: 257]: Unsoundness Warning unspecified type, defaulting to int C: short [257] - GenericResultAtLocation [Line: 257]: Unsoundness Warning unspecified type, defaulting to int C: short [257] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.4s, 94 PlacesBefore, 38 PlacesAfterwards, 87 TransitionsBefore, 31 TransitionsAfterwards, 940 CoEnabledTransitionPairs, 6 FixpointIterations, 49 TrivialSequentialCompositions, 29 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 78 TotalNumberOfCompositions, 3284 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1334, independent: 1169, independent conditional: 0, independent unconditional: 1169, dependent: 165, dependent conditional: 0, dependent unconditional: 165, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 439, independent: 417, independent conditional: 0, independent unconditional: 417, dependent: 22, dependent conditional: 0, dependent unconditional: 22, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1334, independent: 752, independent conditional: 0, independent unconditional: 752, dependent: 143, dependent conditional: 0, dependent unconditional: 143, unknown: 439, unknown conditional: 0, unknown unconditional: 439] , Statistics on independence cache: Total cache size (in pairs): 84, Positive cache size: 73, Positive conditional cache size: 0, Positive unconditional cache size: 73, Negative cache size: 11, Negative conditional cache size: 0, Negative unconditional cache size: 11, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 20]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 130 locations, 11 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 5.5s, OverallIterations: 8, TraceHistogramMax: 1, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.6s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 118 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 118 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 9 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 417 IncrementalHoareTripleChecker+Invalid, 426 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 9 mSolverCounterUnsat, 0 mSDtfsCounter, 417 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=95occurred in iteration=6, InterpolantAutomatonStates: 33, 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: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 86 NumberOfCodeBlocks, 86 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 78 ConstructedInterpolants, 0 QuantifiedInterpolants, 434 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 PerfectInterpolantSequences, 0/0 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 - AllSpecificationsHoldResult: All specifications hold 9 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-26 17:42:42,159 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...