/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.pointer.base.address.is.valid.at.dereference ASSERTandASSUME --cacsl2boogietranslator.pointer.to.allocated.memory.at.dereference ASSERTandASSUME --cacsl2boogietranslator.check.array.bounds.for.arrays.that.are.off.heap ASSERTandASSUME --cacsl2boogietranslator.check.if.freed.pointer.was.valid true --cacsl2boogietranslator.adapt.memory.model.on.pointer.casts.if.necessary true -i ../../../trunk/examples/svcomp/goblint-regression/06-symbeq_08-tricky_address3.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 12:23:43,296 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 12:23:43,348 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-08-26 12:23:43,353 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 12:23:43,353 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 12:23:43,381 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 12:23:43,381 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 12:23:43,382 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 12:23:43,382 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 12:23:43,385 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 12:23:43,385 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 12:23:43,385 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 12:23:43,385 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 12:23:43,386 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 12:23:43,386 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 12:23:43,387 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 12:23:43,387 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 12:23:43,387 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 12:23:43,387 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 12:23:43,387 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 12:23:43,387 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 12:23:43,388 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 12:23:43,388 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 12:23:43,388 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 12:23:43,388 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 12:23:43,389 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 12:23:43,389 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 12:23:43,389 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 12:23:43,389 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 12:23:43,389 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 12:23:43,390 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 12:23:43,390 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 12:23:43,390 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 12:23:43,391 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 12:23:43,391 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 12:23:43,391 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 12:23:43,645 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 12:23:43,659 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 12:23:43,661 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 12:23:43,662 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 12:23:43,663 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 12:23:43,664 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/06-symbeq_08-tricky_address3.i [2023-08-26 12:23:44,634 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 12:23:44,830 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 12:23:44,830 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/06-symbeq_08-tricky_address3.i [2023-08-26 12:23:44,848 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/70620809d/15154770cd374ce388233efbddf3741a/FLAG0ab8db890 [2023-08-26 12:23:44,863 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/70620809d/15154770cd374ce388233efbddf3741a [2023-08-26 12:23:44,865 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 12:23:44,866 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 12:23:44,866 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 12:23:44,866 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 12:23:44,868 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 12:23:44,868 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 12:23:44" (1/1) ... [2023-08-26 12:23:44,869 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1999e4b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:23:44, skipping insertion in model container [2023-08-26 12:23:44,869 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 12:23:44" (1/1) ... [2023-08-26 12:23:44,901 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 12:23:45,215 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 12:23:45,236 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 12:23:45,259 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [249] [2023-08-26 12:23:45,260 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [249] [2023-08-26 12:23:45,264 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: unsigned short [741] [2023-08-26 12:23:45,273 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 12:23:45,325 INFO L206 MainTranslator]: Completed translation [2023-08-26 12:23:45,326 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:23:45 WrapperNode [2023-08-26 12:23:45,326 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 12:23:45,327 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 12:23:45,327 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 12:23:45,327 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 12:23:45,331 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:23:45" (1/1) ... [2023-08-26 12:23:45,355 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:23:45" (1/1) ... [2023-08-26 12:23:45,374 INFO L138 Inliner]: procedures = 264, calls = 16, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 70 [2023-08-26 12:23:45,374 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 12:23:45,375 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 12:23:45,375 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 12:23:45,375 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 12:23:45,381 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:23:45" (1/1) ... [2023-08-26 12:23:45,381 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:23:45" (1/1) ... [2023-08-26 12:23:45,389 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:23:45" (1/1) ... [2023-08-26 12:23:45,389 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:23:45" (1/1) ... [2023-08-26 12:23:45,400 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:23:45" (1/1) ... [2023-08-26 12:23:45,402 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:23:45" (1/1) ... [2023-08-26 12:23:45,403 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:23:45" (1/1) ... [2023-08-26 12:23:45,404 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:23:45" (1/1) ... [2023-08-26 12:23:45,405 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 12:23:45,405 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 12:23:45,406 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 12:23:45,406 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 12:23:45,406 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:23:45" (1/1) ... [2023-08-26 12:23:45,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 12:23:45,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 12:23:45,436 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-26 12:23:45,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-26 12:23:45,458 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 12:23:45,458 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 12:23:45,459 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-26 12:23:45,459 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 12:23:45,459 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-26 12:23:45,459 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 12:23:45,459 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-26 12:23:45,459 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-26 12:23:45,459 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 12:23:45,459 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 12:23:45,460 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-26 12:23:45,546 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 12:23:45,547 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 12:23:45,719 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 12:23:45,723 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 12:23:45,724 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-08-26 12:23:45,725 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 12:23:45 BoogieIcfgContainer [2023-08-26 12:23:45,725 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 12:23:45,726 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 12:23:45,726 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 12:23:45,729 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 12:23:45,729 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 12:23:44" (1/3) ... [2023-08-26 12:23:45,730 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@481d261a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 12:23:45, skipping insertion in model container [2023-08-26 12:23:45,730 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:23:45" (2/3) ... [2023-08-26 12:23:45,730 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@481d261a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 12:23:45, skipping insertion in model container [2023-08-26 12:23:45,730 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 12:23:45" (3/3) ... [2023-08-26 12:23:45,731 INFO L112 eAbstractionObserver]: Analyzing ICFG 06-symbeq_08-tricky_address3.i [2023-08-26 12:23:45,744 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 12:23:45,744 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2023-08-26 12:23:45,744 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 12:23:45,798 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-26 12:23:45,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 84 places, 84 transitions, 173 flow [2023-08-26 12:23:45,866 INFO L124 PetriNetUnfolderBase]: 4/83 cut-off events. [2023-08-26 12:23:45,866 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 12:23:45,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87 conditions, 83 events. 4/83 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 77 event pairs, 0 based on Foata normal form. 0/69 useless extension candidates. Maximal degree in co-relation 48. Up to 2 conditions per place. [2023-08-26 12:23:45,870 INFO L82 GeneralOperation]: Start removeDead. Operand has 84 places, 84 transitions, 173 flow [2023-08-26 12:23:45,874 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 83 places, 83 transitions, 169 flow [2023-08-26 12:23:45,877 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 12:23:45,887 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 83 places, 83 transitions, 169 flow [2023-08-26 12:23:45,890 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 83 places, 83 transitions, 169 flow [2023-08-26 12:23:45,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 83 places, 83 transitions, 169 flow [2023-08-26 12:23:45,915 INFO L124 PetriNetUnfolderBase]: 4/83 cut-off events. [2023-08-26 12:23:45,915 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 12:23:45,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87 conditions, 83 events. 4/83 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 77 event pairs, 0 based on Foata normal form. 0/69 useless extension candidates. Maximal degree in co-relation 48. Up to 2 conditions per place. [2023-08-26 12:23:45,916 INFO L119 LiptonReduction]: Number of co-enabled transitions 1102 [2023-08-26 12:23:47,638 INFO L134 LiptonReduction]: Checked pairs total: 1914 [2023-08-26 12:23:47,638 INFO L136 LiptonReduction]: Total number of compositions: 85 [2023-08-26 12:23:47,647 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 12:23:47,650 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;@3e548bc7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 12:23:47,651 INFO L358 AbstractCegarLoop]: Starting to check reachability of 15 error locations. [2023-08-26 12:23:47,652 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 12:23:47,652 INFO L124 PetriNetUnfolderBase]: 1/3 cut-off events. [2023-08-26 12:23:47,652 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 12:23:47,652 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:23:47,652 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 12:23:47,653 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-08-26 12:23:47,655 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:23:47,655 INFO L85 PathProgramCache]: Analyzing trace with hash 10282, now seen corresponding path program 1 times [2023-08-26 12:23:47,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:23:47,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892195632] [2023-08-26 12:23:47,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:23:47,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:23:47,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:23:47,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:23:47,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:23:47,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892195632] [2023-08-26 12:23:47,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892195632] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:23:47,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:23:47,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 12:23:47,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739428921] [2023-08-26 12:23:47,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:23:47,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 12:23:47,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:23:47,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 12:23:47,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 12:23:47,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 169 [2023-08-26 12:23:47,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 23 transitions, 49 flow. Second operand has 2 states, 2 states have (on average 81.0) internal successors, (162), 2 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:23:47,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:23:47,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 169 [2023-08-26 12:23:47,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:23:47,807 INFO L124 PetriNetUnfolderBase]: 36/94 cut-off events. [2023-08-26 12:23:47,807 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 12:23:47,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 185 conditions, 94 events. 36/94 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 347 event pairs, 35 based on Foata normal form. 0/60 useless extension candidates. Maximal degree in co-relation 172. Up to 87 conditions per place. [2023-08-26 12:23:47,809 INFO L140 encePairwiseOnDemand]: 164/169 looper letters, 16 selfloop transitions, 0 changer transitions 0/18 dead transitions. [2023-08-26 12:23:47,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 18 transitions, 71 flow [2023-08-26 12:23:47,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 12:23:47,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 12:23:47,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 181 transitions. [2023-08-26 12:23:47,818 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5355029585798816 [2023-08-26 12:23:47,819 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 181 transitions. [2023-08-26 12:23:47,819 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 181 transitions. [2023-08-26 12:23:47,820 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:23:47,821 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 181 transitions. [2023-08-26 12:23:47,825 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 90.5) internal successors, (181), 2 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:23:47,829 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 169.0) internal successors, (507), 3 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:23:47,830 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 169.0) internal successors, (507), 3 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:23:47,831 INFO L175 Difference]: Start difference. First operand has 26 places, 23 transitions, 49 flow. Second operand 2 states and 181 transitions. [2023-08-26 12:23:47,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 18 transitions, 71 flow [2023-08-26 12:23:47,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 18 transitions, 70 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 12:23:47,833 INFO L231 Difference]: Finished difference. Result has 21 places, 18 transitions, 38 flow [2023-08-26 12:23:47,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=38, PETRI_PLACES=21, PETRI_TRANSITIONS=18} [2023-08-26 12:23:47,838 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, -5 predicate places. [2023-08-26 12:23:47,838 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 18 transitions, 38 flow [2023-08-26 12:23:47,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 81.0) internal successors, (162), 2 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:23:47,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:23:47,838 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-26 12:23:47,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 12:23:47,838 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-08-26 12:23:47,839 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:23:47,839 INFO L85 PathProgramCache]: Analyzing trace with hash 9886025, now seen corresponding path program 1 times [2023-08-26 12:23:47,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:23:47,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404561199] [2023-08-26 12:23:47,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:23:47,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:23:47,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:23:47,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:23:47,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:23:47,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404561199] [2023-08-26 12:23:47,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404561199] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:23:47,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:23:47,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 12:23:47,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687958000] [2023-08-26 12:23:47,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:23:47,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:23:47,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:23:47,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:23:47,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:23:47,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 169 [2023-08-26 12:23:47,932 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 18 transitions, 38 flow. Second operand has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 3 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:23:47,932 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:23:47,932 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 169 [2023-08-26 12:23:47,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:23:47,973 INFO L124 PetriNetUnfolderBase]: 36/95 cut-off events. [2023-08-26 12:23:47,973 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 12:23:47,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 187 conditions, 95 events. 36/95 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 347 event pairs, 35 based on Foata normal form. 0/61 useless extension candidates. Maximal degree in co-relation 184. Up to 87 conditions per place. [2023-08-26 12:23:47,974 INFO L140 encePairwiseOnDemand]: 166/169 looper letters, 15 selfloop transitions, 2 changer transitions 0/19 dead transitions. [2023-08-26 12:23:47,974 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 19 transitions, 74 flow [2023-08-26 12:23:47,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:23:47,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:23:47,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 234 transitions. [2023-08-26 12:23:47,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46153846153846156 [2023-08-26 12:23:47,978 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 234 transitions. [2023-08-26 12:23:47,978 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 234 transitions. [2023-08-26 12:23:47,978 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:23:47,978 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 234 transitions. [2023-08-26 12:23:47,979 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 78.0) internal successors, (234), 3 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:23:47,980 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 169.0) internal successors, (676), 4 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:23:47,980 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 169.0) internal successors, (676), 4 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:23:47,980 INFO L175 Difference]: Start difference. First operand has 21 places, 18 transitions, 38 flow. Second operand 3 states and 234 transitions. [2023-08-26 12:23:47,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 19 transitions, 74 flow [2023-08-26 12:23:47,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 19 transitions, 74 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 12:23:47,981 INFO L231 Difference]: Finished difference. Result has 24 places, 19 transitions, 50 flow [2023-08-26 12:23:47,981 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=50, PETRI_PLACES=24, PETRI_TRANSITIONS=19} [2023-08-26 12:23:47,981 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, -2 predicate places. [2023-08-26 12:23:47,982 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 19 transitions, 50 flow [2023-08-26 12:23:47,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 3 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:23:47,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:23:47,982 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 12:23:47,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 12:23:47,982 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-08-26 12:23:47,982 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:23:47,983 INFO L85 PathProgramCache]: Analyzing trace with hash 306068147, now seen corresponding path program 1 times [2023-08-26 12:23:47,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:23:47,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451939636] [2023-08-26 12:23:47,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:23:47,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:23:47,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:23:48,032 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:23:48,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:23:48,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451939636] [2023-08-26 12:23:48,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451939636] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 12:23:48,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099892306] [2023-08-26 12:23:48,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:23:48,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 12:23:48,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 12:23:48,035 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 12:23:48,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-26 12:23:48,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:23:48,103 INFO L262 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-26 12:23:48,105 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 12:23:48,129 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:23:48,129 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 12:23:48,141 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:23:48,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099892306] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 12:23:48,143 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 12:23:48,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-26 12:23:48,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035395420] [2023-08-26 12:23:48,143 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 12:23:48,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 12:23:48,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:23:48,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 12:23:48,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-26 12:23:48,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 169 [2023-08-26 12:23:48,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 19 transitions, 50 flow. Second operand has 7 states, 7 states have (on average 73.42857142857143) internal successors, (514), 7 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:23:48,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:23:48,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 169 [2023-08-26 12:23:48,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:23:48,200 INFO L124 PetriNetUnfolderBase]: 36/98 cut-off events. [2023-08-26 12:23:48,200 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 12:23:48,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 203 conditions, 98 events. 36/98 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 347 event pairs, 35 based on Foata normal form. 0/64 useless extension candidates. Maximal degree in co-relation 198. Up to 87 conditions per place. [2023-08-26 12:23:48,201 INFO L140 encePairwiseOnDemand]: 166/169 looper letters, 15 selfloop transitions, 5 changer transitions 0/22 dead transitions. [2023-08-26 12:23:48,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 22 transitions, 102 flow [2023-08-26 12:23:48,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 12:23:48,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 12:23:48,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 455 transitions. [2023-08-26 12:23:48,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44871794871794873 [2023-08-26 12:23:48,204 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 455 transitions. [2023-08-26 12:23:48,204 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 455 transitions. [2023-08-26 12:23:48,205 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:23:48,205 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 455 transitions. [2023-08-26 12:23:48,206 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 75.83333333333333) internal successors, (455), 6 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:23:48,209 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 169.0) internal successors, (1183), 7 states have internal predecessors, (1183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:23:48,209 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 169.0) internal successors, (1183), 7 states have internal predecessors, (1183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:23:48,209 INFO L175 Difference]: Start difference. First operand has 24 places, 19 transitions, 50 flow. Second operand 6 states and 455 transitions. [2023-08-26 12:23:48,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 22 transitions, 102 flow [2023-08-26 12:23:48,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 22 transitions, 98 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-26 12:23:48,210 INFO L231 Difference]: Finished difference. Result has 31 places, 22 transitions, 82 flow [2023-08-26 12:23:48,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=82, PETRI_PLACES=31, PETRI_TRANSITIONS=22} [2023-08-26 12:23:48,211 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 5 predicate places. [2023-08-26 12:23:48,211 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 22 transitions, 82 flow [2023-08-26 12:23:48,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 73.42857142857143) internal successors, (514), 7 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:23:48,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:23:48,212 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2023-08-26 12:23:48,219 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-26 12:23:48,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 12:23:48,417 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-08-26 12:23:48,417 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:23:48,417 INFO L85 PathProgramCache]: Analyzing trace with hash -535239735, now seen corresponding path program 2 times [2023-08-26 12:23:48,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:23:48,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642325154] [2023-08-26 12:23:48,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:23:48,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:23:48,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:23:48,527 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:23:48,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:23:48,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642325154] [2023-08-26 12:23:48,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642325154] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 12:23:48,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999485153] [2023-08-26 12:23:48,528 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 12:23:48,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 12:23:48,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 12:23:48,529 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 12:23:48,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-26 12:23:48,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-26 12:23:48,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 12:23:48,577 INFO L262 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-26 12:23:48,577 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 12:23:48,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 12:23:48,651 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-26 12:23:48,670 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-26 12:23:48,671 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-26 12:23:48,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999485153] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:23:48,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-26 12:23:48,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 8 [2023-08-26 12:23:48,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675854279] [2023-08-26 12:23:48,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:23:48,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 12:23:48,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:23:48,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 12:23:48,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-08-26 12:23:48,672 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 169 [2023-08-26 12:23:48,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 22 transitions, 82 flow. Second operand has 4 states, 4 states have (on average 57.25) internal successors, (229), 4 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 12:23:48,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:23:48,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 169 [2023-08-26 12:23:48,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:23:48,705 INFO L124 PetriNetUnfolderBase]: 31/82 cut-off events. [2023-08-26 12:23:48,706 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 12:23:48,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 189 conditions, 82 events. 31/82 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 213 event pairs, 30 based on Foata normal form. 0/69 useless extension candidates. Maximal degree in co-relation 181. Up to 73 conditions per place. [2023-08-26 12:23:48,706 INFO L140 encePairwiseOnDemand]: 165/169 looper letters, 17 selfloop transitions, 2 changer transitions 0/20 dead transitions. [2023-08-26 12:23:48,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 20 transitions, 116 flow [2023-08-26 12:23:48,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 12:23:48,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 12:23:48,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 241 transitions. [2023-08-26 12:23:48,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35650887573964496 [2023-08-26 12:23:48,707 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 241 transitions. [2023-08-26 12:23:48,708 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 241 transitions. [2023-08-26 12:23:48,708 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:23:48,708 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 241 transitions. [2023-08-26 12:23:48,708 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 60.25) internal successors, (241), 4 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:23:48,709 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 169.0) internal successors, (845), 5 states have internal predecessors, (845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:23:48,710 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 169.0) internal successors, (845), 5 states have internal predecessors, (845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:23:48,710 INFO L175 Difference]: Start difference. First operand has 31 places, 22 transitions, 82 flow. Second operand 4 states and 241 transitions. [2023-08-26 12:23:48,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 20 transitions, 116 flow [2023-08-26 12:23:48,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 20 transitions, 102 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-26 12:23:48,711 INFO L231 Difference]: Finished difference. Result has 31 places, 20 transitions, 68 flow [2023-08-26 12:23:48,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=68, PETRI_PLACES=31, PETRI_TRANSITIONS=20} [2023-08-26 12:23:48,711 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 5 predicate places. [2023-08-26 12:23:48,712 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 20 transitions, 68 flow [2023-08-26 12:23:48,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 57.25) internal successors, (229), 4 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 12:23:48,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:23:48,712 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2023-08-26 12:23:48,717 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-26 12:23:48,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-08-26 12:23:48,916 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-08-26 12:23:48,917 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:23:48,917 INFO L85 PathProgramCache]: Analyzing trace with hash -535239736, now seen corresponding path program 1 times [2023-08-26 12:23:48,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:23:48,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898697986] [2023-08-26 12:23:48,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:23:48,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:23:48,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:23:48,981 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:23:48,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:23:48,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898697986] [2023-08-26 12:23:48,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898697986] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 12:23:48,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202974092] [2023-08-26 12:23:48,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:23:48,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 12:23:48,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 12:23:48,984 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 12:23:48,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-26 12:23:49,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:23:49,036 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-26 12:23:49,037 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 12:23:49,048 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:23:49,048 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 12:23:49,085 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:23:49,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202974092] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 12:23:49,086 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 12:23:49,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-26 12:23:49,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254319441] [2023-08-26 12:23:49,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 12:23:49,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-26 12:23:49,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:23:49,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-26 12:23:49,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-26 12:23:49,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 169 [2023-08-26 12:23:49,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 20 transitions, 68 flow. Second operand has 13 states, 13 states have (on average 73.23076923076923) internal successors, (952), 13 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:23:49,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:23:49,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 169 [2023-08-26 12:23:49,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:23:49,124 INFO L124 PetriNetUnfolderBase]: 25/78 cut-off events. [2023-08-26 12:23:49,124 INFO L125 PetriNetUnfolderBase]: For 47/47 co-relation queries the response was YES. [2023-08-26 12:23:49,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 186 conditions, 78 events. 25/78 cut-off events. For 47/47 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 216 event pairs, 24 based on Foata normal form. 6/68 useless extension candidates. Maximal degree in co-relation 177. Up to 63 conditions per place. [2023-08-26 12:23:49,124 INFO L140 encePairwiseOnDemand]: 166/169 looper letters, 13 selfloop transitions, 11 changer transitions 0/26 dead transitions. [2023-08-26 12:23:49,125 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 26 transitions, 152 flow [2023-08-26 12:23:49,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-26 12:23:49,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-26 12:23:49,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 894 transitions. [2023-08-26 12:23:49,127 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4408284023668639 [2023-08-26 12:23:49,127 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 894 transitions. [2023-08-26 12:23:49,127 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 894 transitions. [2023-08-26 12:23:49,127 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:23:49,127 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 894 transitions. [2023-08-26 12:23:49,129 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 74.5) internal successors, (894), 12 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:23:49,131 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 169.0) internal successors, (2197), 13 states have internal predecessors, (2197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:23:49,131 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 169.0) internal successors, (2197), 13 states have internal predecessors, (2197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:23:49,131 INFO L175 Difference]: Start difference. First operand has 31 places, 20 transitions, 68 flow. Second operand 12 states and 894 transitions. [2023-08-26 12:23:49,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 26 transitions, 152 flow [2023-08-26 12:23:49,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 26 transitions, 149 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 12:23:49,134 INFO L231 Difference]: Finished difference. Result has 46 places, 26 transitions, 149 flow [2023-08-26 12:23:49,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=65, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=149, PETRI_PLACES=46, PETRI_TRANSITIONS=26} [2023-08-26 12:23:49,135 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 20 predicate places. [2023-08-26 12:23:49,135 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 26 transitions, 149 flow [2023-08-26 12:23:49,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 73.23076923076923) internal successors, (952), 13 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:23:49,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:23:49,136 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1] [2023-08-26 12:23:49,142 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-26 12:23:49,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 12:23:49,342 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-08-26 12:23:49,342 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:23:49,342 INFO L85 PathProgramCache]: Analyzing trace with hash 1679596424, now seen corresponding path program 2 times [2023-08-26 12:23:49,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:23:49,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262825392] [2023-08-26 12:23:49,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:23:49,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:23:49,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:23:49,420 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-26 12:23:49,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:23:49,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262825392] [2023-08-26 12:23:49,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262825392] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:23:49,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:23:49,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 12:23:49,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133479036] [2023-08-26 12:23:49,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:23:49,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 12:23:49,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:23:49,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 12:23:49,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 12:23:49,422 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 169 [2023-08-26 12:23:49,423 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 26 transitions, 149 flow. Second operand has 4 states, 4 states have (on average 59.25) internal successors, (237), 4 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:23:49,423 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:23:49,423 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 169 [2023-08-26 12:23:49,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:23:49,449 INFO L124 PetriNetUnfolderBase]: 31/85 cut-off events. [2023-08-26 12:23:49,450 INFO L125 PetriNetUnfolderBase]: For 31/31 co-relation queries the response was YES. [2023-08-26 12:23:49,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 235 conditions, 85 events. 31/85 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 200 event pairs, 24 based on Foata normal form. 0/73 useless extension candidates. Maximal degree in co-relation 220. Up to 72 conditions per place. [2023-08-26 12:23:49,450 INFO L140 encePairwiseOnDemand]: 166/169 looper letters, 25 selfloop transitions, 2 changer transitions 4/31 dead transitions. [2023-08-26 12:23:49,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 31 transitions, 221 flow [2023-08-26 12:23:49,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:23:49,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:23:49,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 196 transitions. [2023-08-26 12:23:49,451 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3865877712031558 [2023-08-26 12:23:49,451 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 196 transitions. [2023-08-26 12:23:49,451 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 196 transitions. [2023-08-26 12:23:49,451 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:23:49,451 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 196 transitions. [2023-08-26 12:23:49,452 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 65.33333333333333) internal successors, (196), 3 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:23:49,452 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 169.0) internal successors, (676), 4 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:23:49,453 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 169.0) internal successors, (676), 4 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:23:49,453 INFO L175 Difference]: Start difference. First operand has 46 places, 26 transitions, 149 flow. Second operand 3 states and 196 transitions. [2023-08-26 12:23:49,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 31 transitions, 221 flow [2023-08-26 12:23:49,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 31 transitions, 173 flow, removed 19 selfloop flow, removed 5 redundant places. [2023-08-26 12:23:49,469 INFO L231 Difference]: Finished difference. Result has 42 places, 23 transitions, 99 flow [2023-08-26 12:23:49,469 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=99, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=99, PETRI_PLACES=42, PETRI_TRANSITIONS=23} [2023-08-26 12:23:49,469 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 16 predicate places. [2023-08-26 12:23:49,470 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 23 transitions, 99 flow [2023-08-26 12:23:49,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 59.25) internal successors, (237), 4 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:23:49,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:23:49,470 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1] [2023-08-26 12:23:49,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 12:23:49,470 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-08-26 12:23:49,470 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:23:49,470 INFO L85 PathProgramCache]: Analyzing trace with hash 527882229, now seen corresponding path program 1 times [2023-08-26 12:23:49,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:23:49,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76378742] [2023-08-26 12:23:49,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:23:49,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:23:49,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:23:49,553 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-26 12:23:49,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:23:49,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76378742] [2023-08-26 12:23:49,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76378742] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:23:49,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:23:49,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 12:23:49,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14963666] [2023-08-26 12:23:49,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:23:49,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 12:23:49,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:23:49,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 12:23:49,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-26 12:23:49,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 169 [2023-08-26 12:23:49,555 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 23 transitions, 99 flow. Second operand has 5 states, 5 states have (on average 54.2) internal successors, (271), 5 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:23:49,555 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:23:49,555 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 169 [2023-08-26 12:23:49,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:23:49,588 INFO L124 PetriNetUnfolderBase]: 10/43 cut-off events. [2023-08-26 12:23:49,588 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-26 12:23:49,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131 conditions, 43 events. 10/43 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 55 event pairs, 0 based on Foata normal form. 6/48 useless extension candidates. Maximal degree in co-relation 116. Up to 18 conditions per place. [2023-08-26 12:23:49,589 INFO L140 encePairwiseOnDemand]: 163/169 looper letters, 25 selfloop transitions, 4 changer transitions 1/30 dead transitions. [2023-08-26 12:23:49,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 30 transitions, 175 flow [2023-08-26 12:23:49,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 12:23:49,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 12:23:49,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 288 transitions. [2023-08-26 12:23:49,590 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3408284023668639 [2023-08-26 12:23:49,590 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 288 transitions. [2023-08-26 12:23:49,590 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 288 transitions. [2023-08-26 12:23:49,590 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:23:49,590 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 288 transitions. [2023-08-26 12:23:49,591 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 57.6) internal successors, (288), 5 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:23:49,592 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 169.0) internal successors, (1014), 6 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:23:49,592 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 169.0) internal successors, (1014), 6 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:23:49,592 INFO L175 Difference]: Start difference. First operand has 42 places, 23 transitions, 99 flow. Second operand 5 states and 288 transitions. [2023-08-26 12:23:49,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 30 transitions, 175 flow [2023-08-26 12:23:49,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 30 transitions, 169 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 12:23:49,593 INFO L231 Difference]: Finished difference. Result has 46 places, 25 transitions, 125 flow [2023-08-26 12:23:49,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=95, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=125, PETRI_PLACES=46, PETRI_TRANSITIONS=25} [2023-08-26 12:23:49,594 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 20 predicate places. [2023-08-26 12:23:49,594 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 25 transitions, 125 flow [2023-08-26 12:23:49,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 54.2) internal successors, (271), 5 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:23:49,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:23:49,594 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:23:49,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 12:23:49,595 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-08-26 12:23:49,595 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:23:49,595 INFO L85 PathProgramCache]: Analyzing trace with hash -1895213670, now seen corresponding path program 1 times [2023-08-26 12:23:49,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:23:49,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804229419] [2023-08-26 12:23:49,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:23:49,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:23:49,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:23:49,690 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-26 12:23:49,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:23:49,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804229419] [2023-08-26 12:23:49,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804229419] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:23:49,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:23:49,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 12:23:49,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182432535] [2023-08-26 12:23:49,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:23:49,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 12:23:49,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:23:49,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 12:23:49,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-08-26 12:23:49,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 169 [2023-08-26 12:23:49,692 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 25 transitions, 125 flow. Second operand has 7 states, 7 states have (on average 51.57142857142857) internal successors, (361), 7 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:23:49,692 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:23:49,692 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 169 [2023-08-26 12:23:49,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:23:49,778 INFO L124 PetriNetUnfolderBase]: 11/51 cut-off events. [2023-08-26 12:23:49,778 INFO L125 PetriNetUnfolderBase]: For 69/69 co-relation queries the response was YES. [2023-08-26 12:23:49,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 180 conditions, 51 events. 11/51 cut-off events. For 69/69 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 98 event pairs, 1 based on Foata normal form. 2/53 useless extension candidates. Maximal degree in co-relation 162. Up to 18 conditions per place. [2023-08-26 12:23:49,778 INFO L140 encePairwiseOnDemand]: 161/169 looper letters, 22 selfloop transitions, 9 changer transitions 5/36 dead transitions. [2023-08-26 12:23:49,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 36 transitions, 235 flow [2023-08-26 12:23:49,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-26 12:23:49,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-26 12:23:49,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 477 transitions. [2023-08-26 12:23:49,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3136094674556213 [2023-08-26 12:23:49,780 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 477 transitions. [2023-08-26 12:23:49,780 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 477 transitions. [2023-08-26 12:23:49,780 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:23:49,780 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 477 transitions. [2023-08-26 12:23:49,781 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 53.0) internal successors, (477), 9 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:23:49,783 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 169.0) internal successors, (1690), 10 states have internal predecessors, (1690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:23:49,783 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 169.0) internal successors, (1690), 10 states have internal predecessors, (1690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:23:49,783 INFO L175 Difference]: Start difference. First operand has 46 places, 25 transitions, 125 flow. Second operand 9 states and 477 transitions. [2023-08-26 12:23:49,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 36 transitions, 235 flow [2023-08-26 12:23:49,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 36 transitions, 228 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-26 12:23:49,784 INFO L231 Difference]: Finished difference. Result has 53 places, 28 transitions, 159 flow [2023-08-26 12:23:49,785 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=159, PETRI_PLACES=53, PETRI_TRANSITIONS=28} [2023-08-26 12:23:49,785 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 27 predicate places. [2023-08-26 12:23:49,785 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 28 transitions, 159 flow [2023-08-26 12:23:49,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 51.57142857142857) internal successors, (361), 7 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:23:49,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:23:49,785 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:23:49,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-26 12:23:49,786 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-08-26 12:23:49,786 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:23:49,786 INFO L85 PathProgramCache]: Analyzing trace with hash -845916990, now seen corresponding path program 2 times [2023-08-26 12:23:49,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:23:49,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403873407] [2023-08-26 12:23:49,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:23:49,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:23:49,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:23:49,894 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-26 12:23:49,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:23:49,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403873407] [2023-08-26 12:23:49,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403873407] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:23:49,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:23:49,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-26 12:23:49,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176601221] [2023-08-26 12:23:49,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:23:49,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-26 12:23:49,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:23:49,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-26 12:23:49,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-08-26 12:23:49,896 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 169 [2023-08-26 12:23:49,896 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 28 transitions, 159 flow. Second operand has 8 states, 8 states have (on average 51.375) internal successors, (411), 8 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:23:49,896 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:23:49,896 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 169 [2023-08-26 12:23:49,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:23:49,961 INFO L124 PetriNetUnfolderBase]: 6/38 cut-off events. [2023-08-26 12:23:49,961 INFO L125 PetriNetUnfolderBase]: For 88/88 co-relation queries the response was YES. [2023-08-26 12:23:49,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 158 conditions, 38 events. 6/38 cut-off events. For 88/88 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 41 event pairs, 0 based on Foata normal form. 2/40 useless extension candidates. Maximal degree in co-relation 139. Up to 15 conditions per place. [2023-08-26 12:23:49,962 INFO L140 encePairwiseOnDemand]: 161/169 looper letters, 18 selfloop transitions, 3 changer transitions 11/32 dead transitions. [2023-08-26 12:23:49,962 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 32 transitions, 230 flow [2023-08-26 12:23:49,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 12:23:49,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 12:23:49,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 373 transitions. [2023-08-26 12:23:49,963 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3153000845308538 [2023-08-26 12:23:49,963 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 373 transitions. [2023-08-26 12:23:49,963 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 373 transitions. [2023-08-26 12:23:49,963 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:23:49,964 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 373 transitions. [2023-08-26 12:23:49,964 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 53.285714285714285) internal successors, (373), 7 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:23:49,966 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 169.0) internal successors, (1352), 8 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:23:49,966 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 169.0) internal successors, (1352), 8 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:23:49,966 INFO L175 Difference]: Start difference. First operand has 53 places, 28 transitions, 159 flow. Second operand 7 states and 373 transitions. [2023-08-26 12:23:49,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 32 transitions, 230 flow [2023-08-26 12:23:49,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 32 transitions, 214 flow, removed 3 selfloop flow, removed 4 redundant places. [2023-08-26 12:23:49,967 INFO L231 Difference]: Finished difference. Result has 54 places, 21 transitions, 115 flow [2023-08-26 12:23:49,968 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=137, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=115, PETRI_PLACES=54, PETRI_TRANSITIONS=21} [2023-08-26 12:23:49,968 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 28 predicate places. [2023-08-26 12:23:49,968 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 21 transitions, 115 flow [2023-08-26 12:23:49,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 51.375) internal successors, (411), 8 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:23:49,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:23:49,969 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:23:49,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-26 12:23:49,969 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-08-26 12:23:49,969 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:23:49,969 INFO L85 PathProgramCache]: Analyzing trace with hash -1895238780, now seen corresponding path program 3 times [2023-08-26 12:23:49,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:23:49,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419164209] [2023-08-26 12:23:49,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:23:49,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:23:49,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:23:50,082 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-26 12:23:50,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:23:50,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419164209] [2023-08-26 12:23:50,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419164209] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:23:50,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:23:50,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 12:23:50,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041121954] [2023-08-26 12:23:50,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:23:50,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 12:23:50,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:23:50,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 12:23:50,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-08-26 12:23:50,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 169 [2023-08-26 12:23:50,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 21 transitions, 115 flow. Second operand has 7 states, 7 states have (on average 51.57142857142857) internal successors, (361), 7 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:23:50,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:23:50,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 169 [2023-08-26 12:23:50,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:23:50,120 INFO L124 PetriNetUnfolderBase]: 1/20 cut-off events. [2023-08-26 12:23:50,120 INFO L125 PetriNetUnfolderBase]: For 63/63 co-relation queries the response was YES. [2023-08-26 12:23:50,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96 conditions, 20 events. 1/20 cut-off events. For 63/63 co-relation queries the response was YES. Maximal size of possible extension queue 1. Compared 1 event pairs, 0 based on Foata normal form. 1/21 useless extension candidates. Maximal degree in co-relation 76. Up to 13 conditions per place. [2023-08-26 12:23:50,121 INFO L140 encePairwiseOnDemand]: 164/169 looper letters, 0 selfloop transitions, 0 changer transitions 20/20 dead transitions. [2023-08-26 12:23:50,121 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 20 transitions, 149 flow [2023-08-26 12:23:50,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 12:23:50,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 12:23:50,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 261 transitions. [2023-08-26 12:23:50,122 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3088757396449704 [2023-08-26 12:23:50,122 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 261 transitions. [2023-08-26 12:23:50,122 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 261 transitions. [2023-08-26 12:23:50,122 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:23:50,122 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 261 transitions. [2023-08-26 12:23:50,123 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 52.2) internal successors, (261), 5 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:23:50,123 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 169.0) internal successors, (1014), 6 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:23:50,124 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 169.0) internal successors, (1014), 6 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:23:50,124 INFO L175 Difference]: Start difference. First operand has 54 places, 21 transitions, 115 flow. Second operand 5 states and 261 transitions. [2023-08-26 12:23:50,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 20 transitions, 149 flow [2023-08-26 12:23:50,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 20 transitions, 133 flow, removed 1 selfloop flow, removed 8 redundant places. [2023-08-26 12:23:50,125 INFO L231 Difference]: Finished difference. Result has 42 places, 0 transitions, 0 flow [2023-08-26 12:23:50,125 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=93, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=42, PETRI_TRANSITIONS=0} [2023-08-26 12:23:50,126 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 16 predicate places. [2023-08-26 12:23:50,126 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 0 transitions, 0 flow [2023-08-26 12:23:50,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 51.57142857142857) internal successors, (361), 7 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:23:50,128 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 15 remaining) [2023-08-26 12:23:50,128 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 15 remaining) [2023-08-26 12:23:50,128 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 15 remaining) [2023-08-26 12:23:50,128 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 15 remaining) [2023-08-26 12:23:50,129 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 15 remaining) [2023-08-26 12:23:50,129 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 15 remaining) [2023-08-26 12:23:50,129 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 15 remaining) [2023-08-26 12:23:50,129 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 15 remaining) [2023-08-26 12:23:50,129 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 15 remaining) [2023-08-26 12:23:50,129 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 15 remaining) [2023-08-26 12:23:50,129 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 15 remaining) [2023-08-26 12:23:50,129 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 15 remaining) [2023-08-26 12:23:50,129 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 15 remaining) [2023-08-26 12:23:50,129 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 15 remaining) [2023-08-26 12:23:50,129 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 15 remaining) [2023-08-26 12:23:50,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-26 12:23:50,130 INFO L445 BasicCegarLoop]: Path program histogram: [3, 2, 2, 1, 1, 1] [2023-08-26 12:23:50,133 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-26 12:23:50,133 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-26 12:23:50,137 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 12:23:50 BasicIcfg [2023-08-26 12:23:50,137 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-26 12:23:50,139 INFO L158 Benchmark]: Toolchain (without parser) took 5272.18ms. Allocated memory was 360.7MB in the beginning and 434.1MB in the end (delta: 73.4MB). Free memory was 335.6MB in the beginning and 235.7MB in the end (delta: 99.8MB). Peak memory consumption was 172.7MB. Max. memory is 16.0GB. [2023-08-26 12:23:50,139 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 360.7MB. Free memory is still 336.9MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 12:23:50,139 INFO L158 Benchmark]: CACSL2BoogieTranslator took 459.65ms. Allocated memory is still 360.7MB. Free memory was 335.0MB in the beginning and 307.3MB in the end (delta: 27.7MB). Peak memory consumption was 27.3MB. Max. memory is 16.0GB. [2023-08-26 12:23:50,139 INFO L158 Benchmark]: Boogie Procedure Inliner took 47.82ms. Allocated memory is still 360.7MB. Free memory was 307.3MB in the beginning and 305.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 12:23:50,139 INFO L158 Benchmark]: Boogie Preprocessor took 29.90ms. Allocated memory is still 360.7MB. Free memory was 305.2MB in the beginning and 303.6MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 12:23:50,140 INFO L158 Benchmark]: RCFGBuilder took 319.54ms. Allocated memory is still 360.7MB. Free memory was 303.6MB in the beginning and 288.4MB in the end (delta: 15.2MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. [2023-08-26 12:23:50,140 INFO L158 Benchmark]: TraceAbstraction took 4411.15ms. Allocated memory was 360.7MB in the beginning and 434.1MB in the end (delta: 73.4MB). Free memory was 287.9MB in the beginning and 235.7MB in the end (delta: 52.2MB). Peak memory consumption was 126.6MB. Max. memory is 16.0GB. [2023-08-26 12:23:50,141 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 360.7MB. Free memory is still 336.9MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 459.65ms. Allocated memory is still 360.7MB. Free memory was 335.0MB in the beginning and 307.3MB in the end (delta: 27.7MB). Peak memory consumption was 27.3MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 47.82ms. Allocated memory is still 360.7MB. Free memory was 307.3MB in the beginning and 305.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 29.90ms. Allocated memory is still 360.7MB. Free memory was 305.2MB in the beginning and 303.6MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 319.54ms. Allocated memory is still 360.7MB. Free memory was 303.6MB in the beginning and 288.4MB in the end (delta: 15.2MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. * TraceAbstraction took 4411.15ms. Allocated memory was 360.7MB in the beginning and 434.1MB in the end (delta: 73.4MB). Free memory was 287.9MB in the beginning and 235.7MB in the end (delta: 52.2MB). Peak memory consumption was 126.6MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResultAtLocation [Line: 249]: Unsoundness Warning unspecified type, defaulting to int C: short [249] - GenericResultAtLocation [Line: 249]: Unsoundness Warning unspecified type, defaulting to int C: short [249] - GenericResultAtLocation [Line: 741]: Unsoundness Warning unspecified type, defaulting to int C: unsigned short [741] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.7s, 83 PlacesBefore, 26 PlacesAfterwards, 83 TransitionsBefore, 23 TransitionsAfterwards, 1102 CoEnabledTransitionPairs, 6 FixpointIterations, 31 TrivialSequentialCompositions, 46 ConcurrentSequentialCompositions, 4 TrivialYvCompositions, 1 ConcurrentYvCompositions, 3 ChoiceCompositions, 85 TotalNumberOfCompositions, 1914 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1203, independent: 1098, independent conditional: 0, independent unconditional: 1098, dependent: 105, dependent conditional: 0, dependent unconditional: 105, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 629, independent: 608, independent conditional: 0, independent unconditional: 608, dependent: 21, dependent conditional: 0, dependent unconditional: 21, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1203, independent: 490, independent conditional: 0, independent unconditional: 490, dependent: 84, dependent conditional: 0, dependent unconditional: 84, unknown: 629, unknown conditional: 0, unknown unconditional: 629] , Statistics on independence cache: Total cache size (in pairs): 20, Positive cache size: 12, Positive conditional cache size: 0, Positive unconditional cache size: 12, Negative cache size: 8, Negative conditional cache size: 0, Negative unconditional cache size: 8, 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: -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 - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 3 procedures, 111 locations, 15 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: 4.3s, OverallIterations: 10, TraceHistogramMax: 10, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.8s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 111 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 111 mSDsluCounter, 6 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2 mSDsCounter, 17 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 365 IncrementalHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 17 mSolverCounterUnsat, 4 mSDtfsCounter, 365 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 83 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=159occurred in iteration=8, InterpolantAutomatonStates: 56, 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, 0.9s InterpolantComputationTime, 137 NumberOfCodeBlocks, 133 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 135 ConstructedInterpolants, 0 QuantifiedInterpolants, 874 SizeOfPredicates, 4 NumberOfNonLiveVariables, 221 ConjunctsInSsa, 23 ConjunctsInUnsatCore, 15 InterpolantComputations, 8 PerfectInterpolantSequences, 285/328 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 10 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-26 12:23:50,158 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...