/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.order.of.the.error.locations.to.be.checked INSUFFICIENT_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.pointer.base.address.is.valid.at.dereference ASSERTandASSUME --cacsl2boogietranslator.pointer.to.allocated.memory.at.dereference ASSERTandASSUME --cacsl2boogietranslator.check.array.bounds.for.arrays.that.are.off.heap ASSERTandASSUME --cacsl2boogietranslator.check.if.freed.pointer.was.valid true --cacsl2boogietranslator.adapt.memory.model.on.pointer.casts.if.necessary true -i ../../../trunk/examples/svcomp/goblint-regression/06-symbeq_08-tricky_address3.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 15:30:32,703 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 15:30:32,790 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 15:30:32,795 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 15:30:32,796 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 15:30:32,826 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 15:30:32,827 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 15:30:32,827 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 15:30:32,828 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 15:30:32,831 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 15:30:32,831 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 15:30:32,832 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 15:30:32,832 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 15:30:32,833 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 15:30:32,833 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 15:30:32,834 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 15:30:32,834 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 15:30:32,834 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 15:30:32,834 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 15:30:32,834 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 15:30:32,835 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 15:30:32,835 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 15:30:32,835 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 15:30:32,836 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 15:30:32,836 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 15:30:32,836 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 15:30:32,836 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 15:30:32,837 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 15:30:32,837 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 15:30:32,837 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 15:30:32,838 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 15:30:32,838 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 15:30:32,838 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 15:30:32,839 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 15:30:32,839 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 15:30:32,839 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 15:30:33,124 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 15:30:33,144 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 15:30:33,146 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 15:30:33,147 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 15:30:33,147 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 15:30:33,151 INFO L431 ainManager$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 15:30:34,401 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 15:30:34,686 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 15:30:34,686 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/06-symbeq_08-tricky_address3.i [2023-08-26 15:30:34,709 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fcd04181c/66409d1acd5f4135837f3f8f7af66c51/FLAGbd3c57766 [2023-08-26 15:30:34,726 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fcd04181c/66409d1acd5f4135837f3f8f7af66c51 [2023-08-26 15:30:34,731 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 15:30:34,732 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 15:30:34,734 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 15:30:34,735 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 15:30:34,738 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 15:30:34,738 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 03:30:34" (1/1) ... [2023-08-26 15:30:34,739 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79b826d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:30:34, skipping insertion in model container [2023-08-26 15:30:34,739 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 03:30:34" (1/1) ... [2023-08-26 15:30:34,790 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 15:30:35,203 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 15:30:35,217 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 15:30:35,245 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [249] [2023-08-26 15:30:35,247 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [249] [2023-08-26 15:30:35,270 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: unsigned short [741] [2023-08-26 15:30:35,280 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 15:30:35,338 INFO L206 MainTranslator]: Completed translation [2023-08-26 15:30:35,339 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:30:35 WrapperNode [2023-08-26 15:30:35,339 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 15:30:35,340 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 15:30:35,340 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 15:30:35,340 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 15:30:35,346 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:30:35" (1/1) ... [2023-08-26 15:30:35,363 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:30:35" (1/1) ... [2023-08-26 15:30:35,382 INFO L138 Inliner]: procedures = 264, calls = 16, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 70 [2023-08-26 15:30:35,383 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 15:30:35,384 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 15:30:35,384 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 15:30:35,384 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 15:30:35,391 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:30:35" (1/1) ... [2023-08-26 15:30:35,391 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:30:35" (1/1) ... [2023-08-26 15:30:35,394 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:30:35" (1/1) ... [2023-08-26 15:30:35,395 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:30:35" (1/1) ... [2023-08-26 15:30:35,401 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:30:35" (1/1) ... [2023-08-26 15:30:35,403 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:30:35" (1/1) ... [2023-08-26 15:30:35,405 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:30:35" (1/1) ... [2023-08-26 15:30:35,406 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:30:35" (1/1) ... [2023-08-26 15:30:35,408 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 15:30:35,409 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 15:30:35,409 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 15:30:35,409 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 15:30:35,410 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:30:35" (1/1) ... [2023-08-26 15:30:35,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 15:30:35,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 15:30:35,440 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 15:30:35,467 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 15:30:35,487 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 15:30:35,488 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 15:30:35,488 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-26 15:30:35,488 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 15:30:35,488 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-26 15:30:35,488 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 15:30:35,488 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-26 15:30:35,488 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-26 15:30:35,489 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 15:30:35,489 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 15:30:35,490 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 15:30:35,605 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 15:30:35,607 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 15:30:35,757 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 15:30:35,763 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 15:30:35,763 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-08-26 15:30:35,765 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 03:30:35 BoogieIcfgContainer [2023-08-26 15:30:35,765 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 15:30:35,767 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 15:30:35,767 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 15:30:35,770 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 15:30:35,771 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 03:30:34" (1/3) ... [2023-08-26 15:30:35,771 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57e2e5e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 03:30:35, skipping insertion in model container [2023-08-26 15:30:35,772 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:30:35" (2/3) ... [2023-08-26 15:30:35,772 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57e2e5e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 03:30:35, skipping insertion in model container [2023-08-26 15:30:35,772 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 03:30:35" (3/3) ... [2023-08-26 15:30:35,773 INFO L112 eAbstractionObserver]: Analyzing ICFG 06-symbeq_08-tricky_address3.i [2023-08-26 15:30:35,789 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 15:30:35,789 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2023-08-26 15:30:35,789 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 15:30:35,865 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-26 15:30:35,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 84 places, 84 transitions, 173 flow [2023-08-26 15:30:35,952 INFO L124 PetriNetUnfolderBase]: 4/83 cut-off events. [2023-08-26 15:30:35,953 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 15:30:35,957 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 15:30:35,958 INFO L82 GeneralOperation]: Start removeDead. Operand has 84 places, 84 transitions, 173 flow [2023-08-26 15:30:35,962 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 83 places, 83 transitions, 169 flow [2023-08-26 15:30:35,967 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 15:30:35,978 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 83 places, 83 transitions, 169 flow [2023-08-26 15:30:35,982 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 83 places, 83 transitions, 169 flow [2023-08-26 15:30:35,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 83 places, 83 transitions, 169 flow [2023-08-26 15:30:36,013 INFO L124 PetriNetUnfolderBase]: 4/83 cut-off events. [2023-08-26 15:30:36,014 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 15:30:36,014 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 15:30:36,016 INFO L119 LiptonReduction]: Number of co-enabled transitions 1102 [2023-08-26 15:30:38,259 INFO L134 LiptonReduction]: Checked pairs total: 1914 [2023-08-26 15:30:38,259 INFO L136 LiptonReduction]: Total number of compositions: 85 [2023-08-26 15:30:38,270 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 15:30:38,275 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;@71e822c3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 15:30:38,275 INFO L358 AbstractCegarLoop]: Starting to check reachability of 15 error locations. [2023-08-26 15:30:38,276 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 15:30:38,277 INFO L124 PetriNetUnfolderBase]: 1/3 cut-off events. [2023-08-26 15:30:38,277 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 15:30:38,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:30:38,277 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 15:30:38,278 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 15:30:38,281 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:30:38,282 INFO L85 PathProgramCache]: Analyzing trace with hash 10282, now seen corresponding path program 1 times [2023-08-26 15:30:38,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:30:38,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694371142] [2023-08-26 15:30:38,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:30:38,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:30:38,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:30:38,430 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 15:30:38,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:30:38,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694371142] [2023-08-26 15:30:38,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694371142] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:30:38,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:30:38,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 15:30:38,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314593052] [2023-08-26 15:30:38,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:30:38,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 15:30:38,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:30:38,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 15:30:38,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 15:30:38,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 169 [2023-08-26 15:30:38,472 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 15:30:38,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:30:38,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 169 [2023-08-26 15:30:38,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:30:38,519 INFO L124 PetriNetUnfolderBase]: 36/94 cut-off events. [2023-08-26 15:30:38,520 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 15:30:38,520 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 15:30:38,521 INFO L140 encePairwiseOnDemand]: 164/169 looper letters, 16 selfloop transitions, 0 changer transitions 0/18 dead transitions. [2023-08-26 15:30:38,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 18 transitions, 71 flow [2023-08-26 15:30:38,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 15:30:38,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 15:30:38,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 181 transitions. [2023-08-26 15:30:38,532 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5355029585798816 [2023-08-26 15:30:38,533 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 181 transitions. [2023-08-26 15:30:38,533 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 181 transitions. [2023-08-26 15:30:38,534 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:30:38,536 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 181 transitions. [2023-08-26 15:30:38,538 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 15:30:38,542 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 15:30:38,542 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 15:30:38,544 INFO L175 Difference]: Start difference. First operand has 26 places, 23 transitions, 49 flow. Second operand 2 states and 181 transitions. [2023-08-26 15:30:38,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 18 transitions, 71 flow [2023-08-26 15:30:38,546 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 15:30:38,547 INFO L231 Difference]: Finished difference. Result has 21 places, 18 transitions, 38 flow [2023-08-26 15:30:38,548 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 15:30:38,551 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, -5 predicate places. [2023-08-26 15:30:38,551 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 18 transitions, 38 flow [2023-08-26 15:30:38,551 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 15:30:38,551 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:30:38,551 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-26 15:30:38,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 15:30:38,552 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 15:30:38,552 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:30:38,553 INFO L85 PathProgramCache]: Analyzing trace with hash 9886025, now seen corresponding path program 1 times [2023-08-26 15:30:38,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:30:38,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154637501] [2023-08-26 15:30:38,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:30:38,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:30:38,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:30:38,652 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 15:30:38,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:30:38,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154637501] [2023-08-26 15:30:38,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154637501] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:30:38,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:30:38,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 15:30:38,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341958513] [2023-08-26 15:30:38,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:30:38,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 15:30:38,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:30:38,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 15:30:38,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 15:30:38,656 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 169 [2023-08-26 15:30:38,669 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 15:30:38,669 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:30:38,669 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 169 [2023-08-26 15:30:38,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:30:38,728 INFO L124 PetriNetUnfolderBase]: 36/95 cut-off events. [2023-08-26 15:30:38,728 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 15:30:38,729 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 15:30:38,730 INFO L140 encePairwiseOnDemand]: 166/169 looper letters, 15 selfloop transitions, 2 changer transitions 0/19 dead transitions. [2023-08-26 15:30:38,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 19 transitions, 74 flow [2023-08-26 15:30:38,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 15:30:38,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 15:30:38,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 234 transitions. [2023-08-26 15:30:38,737 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46153846153846156 [2023-08-26 15:30:38,737 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 234 transitions. [2023-08-26 15:30:38,737 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 234 transitions. [2023-08-26 15:30:38,739 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:30:38,740 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 234 transitions. [2023-08-26 15:30:38,742 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 15:30:38,743 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 15:30:38,744 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 15:30:38,744 INFO L175 Difference]: Start difference. First operand has 21 places, 18 transitions, 38 flow. Second operand 3 states and 234 transitions. [2023-08-26 15:30:38,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 19 transitions, 74 flow [2023-08-26 15:30:38,744 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 15:30:38,745 INFO L231 Difference]: Finished difference. Result has 24 places, 19 transitions, 50 flow [2023-08-26 15:30:38,745 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 15:30:38,746 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, -2 predicate places. [2023-08-26 15:30:38,746 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 19 transitions, 50 flow [2023-08-26 15:30:38,746 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 15:30:38,746 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:30:38,746 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 15:30:38,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 15:30:38,747 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 15:30:38,747 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:30:38,747 INFO L85 PathProgramCache]: Analyzing trace with hash 306068147, now seen corresponding path program 1 times [2023-08-26 15:30:38,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:30:38,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478487265] [2023-08-26 15:30:38,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:30:38,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:30:38,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:30:38,826 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 15:30:38,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:30:38,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478487265] [2023-08-26 15:30:38,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478487265] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 15:30:38,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271307800] [2023-08-26 15:30:38,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:30:38,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 15:30:38,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 15:30:38,833 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 15:30:38,875 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 15:30:38,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:30:38,938 INFO L262 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-26 15:30:38,942 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 15:30:38,979 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 15:30:38,979 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 15:30:38,994 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 15:30:38,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271307800] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 15:30:38,995 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 15:30:38,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-26 15:30:38,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041959163] [2023-08-26 15:30:38,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 15:30:38,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 15:30:38,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:30:38,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 15:30:38,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-26 15:30:38,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 169 [2023-08-26 15:30:38,998 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 15:30:38,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:30:38,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 169 [2023-08-26 15:30:38,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:30:39,070 INFO L124 PetriNetUnfolderBase]: 36/98 cut-off events. [2023-08-26 15:30:39,070 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 15:30:39,071 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 15:30:39,071 INFO L140 encePairwiseOnDemand]: 166/169 looper letters, 15 selfloop transitions, 5 changer transitions 0/22 dead transitions. [2023-08-26 15:30:39,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 22 transitions, 102 flow [2023-08-26 15:30:39,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 15:30:39,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 15:30:39,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 455 transitions. [2023-08-26 15:30:39,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44871794871794873 [2023-08-26 15:30:39,075 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 455 transitions. [2023-08-26 15:30:39,075 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 455 transitions. [2023-08-26 15:30:39,076 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:30:39,076 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 455 transitions. [2023-08-26 15:30:39,077 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 15:30:39,079 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 15:30:39,080 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 15:30:39,080 INFO L175 Difference]: Start difference. First operand has 24 places, 19 transitions, 50 flow. Second operand 6 states and 455 transitions. [2023-08-26 15:30:39,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 22 transitions, 102 flow [2023-08-26 15:30:39,081 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 15:30:39,081 INFO L231 Difference]: Finished difference. Result has 31 places, 22 transitions, 82 flow [2023-08-26 15:30:39,081 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 15:30:39,082 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 5 predicate places. [2023-08-26 15:30:39,082 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 22 transitions, 82 flow [2023-08-26 15:30:39,083 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 15:30:39,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:30:39,083 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2023-08-26 15:30:39,092 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 15:30:39,289 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 15:30:39,289 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 15:30:39,290 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:30:39,290 INFO L85 PathProgramCache]: Analyzing trace with hash -535239735, now seen corresponding path program 2 times [2023-08-26 15:30:39,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:30:39,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252877178] [2023-08-26 15:30:39,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:30:39,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:30:39,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:30:39,461 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 15:30:39,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:30:39,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252877178] [2023-08-26 15:30:39,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252877178] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 15:30:39,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712961039] [2023-08-26 15:30:39,463 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 15:30:39,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 15:30:39,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 15:30:39,465 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 15:30:39,467 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 15:30:39,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-26 15:30:39,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 15:30:39,546 INFO L262 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-26 15:30:39,547 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 15:30:39,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 15:30:39,692 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 15:30:39,739 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 15:30:39,740 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-26 15:30:39,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712961039] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:30:39,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-26 15:30:39,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 8 [2023-08-26 15:30:39,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127395795] [2023-08-26 15:30:39,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:30:39,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 15:30:39,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:30:39,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 15:30:39,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-08-26 15:30:39,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 169 [2023-08-26 15:30:39,745 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 15:30:39,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:30:39,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 169 [2023-08-26 15:30:39,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:30:39,817 INFO L124 PetriNetUnfolderBase]: 31/82 cut-off events. [2023-08-26 15:30:39,817 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 15:30:39,818 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 15:30:39,818 INFO L140 encePairwiseOnDemand]: 165/169 looper letters, 17 selfloop transitions, 2 changer transitions 0/20 dead transitions. [2023-08-26 15:30:39,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 20 transitions, 116 flow [2023-08-26 15:30:39,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 15:30:39,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 15:30:39,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 241 transitions. [2023-08-26 15:30:39,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35650887573964496 [2023-08-26 15:30:39,827 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 241 transitions. [2023-08-26 15:30:39,827 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 241 transitions. [2023-08-26 15:30:39,827 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:30:39,828 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 241 transitions. [2023-08-26 15:30:39,828 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 15:30:39,830 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 15:30:39,830 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 15:30:39,830 INFO L175 Difference]: Start difference. First operand has 31 places, 22 transitions, 82 flow. Second operand 4 states and 241 transitions. [2023-08-26 15:30:39,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 20 transitions, 116 flow [2023-08-26 15:30:39,831 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 15:30:39,832 INFO L231 Difference]: Finished difference. Result has 31 places, 20 transitions, 68 flow [2023-08-26 15:30:39,832 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 15:30:39,832 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 5 predicate places. [2023-08-26 15:30:39,834 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 20 transitions, 68 flow [2023-08-26 15:30:39,835 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 15:30:39,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:30:39,836 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2023-08-26 15:30:39,845 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-26 15:30:40,047 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 15:30:40,048 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 15:30:40,048 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:30:40,048 INFO L85 PathProgramCache]: Analyzing trace with hash -535239736, now seen corresponding path program 1 times [2023-08-26 15:30:40,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:30:40,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126066309] [2023-08-26 15:30:40,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:30:40,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:30:40,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:30:40,160 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 15:30:40,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:30:40,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126066309] [2023-08-26 15:30:40,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126066309] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 15:30:40,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12982764] [2023-08-26 15:30:40,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:30:40,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 15:30:40,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 15:30:40,162 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 15:30:40,184 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 15:30:40,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:30:40,236 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-26 15:30:40,237 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 15:30:40,255 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 15:30:40,255 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 15:30:40,308 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 15:30:40,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12982764] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 15:30:40,309 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 15:30:40,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-26 15:30:40,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231920185] [2023-08-26 15:30:40,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 15:30:40,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-26 15:30:40,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:30:40,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-26 15:30:40,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-26 15:30:40,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 169 [2023-08-26 15:30:40,314 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 15:30:40,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:30:40,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 169 [2023-08-26 15:30:40,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:30:40,367 INFO L124 PetriNetUnfolderBase]: 25/78 cut-off events. [2023-08-26 15:30:40,367 INFO L125 PetriNetUnfolderBase]: For 47/47 co-relation queries the response was YES. [2023-08-26 15:30:40,367 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 15:30:40,368 INFO L140 encePairwiseOnDemand]: 166/169 looper letters, 13 selfloop transitions, 11 changer transitions 0/26 dead transitions. [2023-08-26 15:30:40,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 26 transitions, 152 flow [2023-08-26 15:30:40,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-26 15:30:40,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-26 15:30:40,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 894 transitions. [2023-08-26 15:30:40,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4408284023668639 [2023-08-26 15:30:40,371 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 894 transitions. [2023-08-26 15:30:40,371 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 894 transitions. [2023-08-26 15:30:40,372 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:30:40,372 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 894 transitions. [2023-08-26 15:30:40,375 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 15:30:40,377 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 15:30:40,378 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 15:30:40,378 INFO L175 Difference]: Start difference. First operand has 31 places, 20 transitions, 68 flow. Second operand 12 states and 894 transitions. [2023-08-26 15:30:40,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 26 transitions, 152 flow [2023-08-26 15:30:40,381 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 15:30:40,382 INFO L231 Difference]: Finished difference. Result has 46 places, 26 transitions, 149 flow [2023-08-26 15:30:40,382 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 15:30:40,384 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 20 predicate places. [2023-08-26 15:30:40,384 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 26 transitions, 149 flow [2023-08-26 15:30:40,386 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 15:30:40,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:30:40,387 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1] [2023-08-26 15:30:40,394 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-26 15:30:40,591 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 15:30:40,592 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 15:30:40,592 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:30:40,592 INFO L85 PathProgramCache]: Analyzing trace with hash 1679596424, now seen corresponding path program 2 times [2023-08-26 15:30:40,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:30:40,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593392512] [2023-08-26 15:30:40,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:30:40,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:30:40,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:30:40,732 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 15:30:40,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:30:40,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593392512] [2023-08-26 15:30:40,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593392512] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:30:40,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:30:40,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 15:30:40,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879808723] [2023-08-26 15:30:40,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:30:40,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 15:30:40,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:30:40,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 15:30:40,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 15:30:40,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 169 [2023-08-26 15:30:40,736 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 15:30:40,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:30:40,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 169 [2023-08-26 15:30:40,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:30:40,786 INFO L124 PetriNetUnfolderBase]: 31/85 cut-off events. [2023-08-26 15:30:40,786 INFO L125 PetriNetUnfolderBase]: For 31/31 co-relation queries the response was YES. [2023-08-26 15:30:40,787 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 15:30:40,788 INFO L140 encePairwiseOnDemand]: 166/169 looper letters, 25 selfloop transitions, 2 changer transitions 4/31 dead transitions. [2023-08-26 15:30:40,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 31 transitions, 221 flow [2023-08-26 15:30:40,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 15:30:40,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 15:30:40,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 196 transitions. [2023-08-26 15:30:40,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3865877712031558 [2023-08-26 15:30:40,791 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 196 transitions. [2023-08-26 15:30:40,791 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 196 transitions. [2023-08-26 15:30:40,791 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:30:40,791 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 196 transitions. [2023-08-26 15:30:40,792 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 15:30:40,793 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 15:30:40,793 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 15:30:40,793 INFO L175 Difference]: Start difference. First operand has 46 places, 26 transitions, 149 flow. Second operand 3 states and 196 transitions. [2023-08-26 15:30:40,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 31 transitions, 221 flow [2023-08-26 15:30:40,798 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 15:30:40,799 INFO L231 Difference]: Finished difference. Result has 42 places, 23 transitions, 99 flow [2023-08-26 15:30:40,799 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 15:30:40,802 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 16 predicate places. [2023-08-26 15:30:40,802 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 23 transitions, 99 flow [2023-08-26 15:30:40,802 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 15:30:40,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:30:40,802 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1] [2023-08-26 15:30:40,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 15:30:40,803 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 15:30:40,807 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:30:40,809 INFO L85 PathProgramCache]: Analyzing trace with hash 527882229, now seen corresponding path program 1 times [2023-08-26 15:30:40,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:30:40,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69577427] [2023-08-26 15:30:40,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:30:40,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:30:40,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:30:40,982 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 15:30:40,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:30:40,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69577427] [2023-08-26 15:30:40,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69577427] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:30:40,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:30:40,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 15:30:40,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132937025] [2023-08-26 15:30:40,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:30:40,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 15:30:40,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:30:40,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 15:30:40,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-26 15:30:40,989 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 169 [2023-08-26 15:30:40,989 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 15:30:40,989 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:30:40,989 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 169 [2023-08-26 15:30:40,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:30:41,035 INFO L124 PetriNetUnfolderBase]: 10/43 cut-off events. [2023-08-26 15:30:41,035 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-26 15:30:41,038 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 15:30:41,038 INFO L140 encePairwiseOnDemand]: 163/169 looper letters, 25 selfloop transitions, 4 changer transitions 1/30 dead transitions. [2023-08-26 15:30:41,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 30 transitions, 175 flow [2023-08-26 15:30:41,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 15:30:41,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 15:30:41,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 288 transitions. [2023-08-26 15:30:41,040 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3408284023668639 [2023-08-26 15:30:41,040 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 288 transitions. [2023-08-26 15:30:41,040 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 288 transitions. [2023-08-26 15:30:41,040 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:30:41,041 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 288 transitions. [2023-08-26 15:30:41,041 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 15:30:41,043 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 15:30:41,043 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 15:30:41,044 INFO L175 Difference]: Start difference. First operand has 42 places, 23 transitions, 99 flow. Second operand 5 states and 288 transitions. [2023-08-26 15:30:41,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 30 transitions, 175 flow [2023-08-26 15:30:41,046 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 15:30:41,047 INFO L231 Difference]: Finished difference. Result has 46 places, 25 transitions, 125 flow [2023-08-26 15:30:41,047 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 15:30:41,048 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 20 predicate places. [2023-08-26 15:30:41,048 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 25 transitions, 125 flow [2023-08-26 15:30:41,049 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 15:30:41,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:30:41,049 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:30:41,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 15:30:41,050 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 15:30:41,050 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:30:41,050 INFO L85 PathProgramCache]: Analyzing trace with hash -1895213670, now seen corresponding path program 1 times [2023-08-26 15:30:41,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:30:41,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175293895] [2023-08-26 15:30:41,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:30:41,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:30:41,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:30:41,213 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 15:30:41,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:30:41,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175293895] [2023-08-26 15:30:41,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175293895] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:30:41,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:30:41,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 15:30:41,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975538671] [2023-08-26 15:30:41,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:30:41,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 15:30:41,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:30:41,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 15:30:41,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-08-26 15:30:41,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 169 [2023-08-26 15:30:41,216 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 15:30:41,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:30:41,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 169 [2023-08-26 15:30:41,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:30:41,311 INFO L124 PetriNetUnfolderBase]: 11/51 cut-off events. [2023-08-26 15:30:41,311 INFO L125 PetriNetUnfolderBase]: For 69/69 co-relation queries the response was YES. [2023-08-26 15:30:41,312 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 15:30:41,312 INFO L140 encePairwiseOnDemand]: 161/169 looper letters, 22 selfloop transitions, 9 changer transitions 5/36 dead transitions. [2023-08-26 15:30:41,312 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 36 transitions, 235 flow [2023-08-26 15:30:41,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-26 15:30:41,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-26 15:30:41,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 477 transitions. [2023-08-26 15:30:41,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3136094674556213 [2023-08-26 15:30:41,314 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 477 transitions. [2023-08-26 15:30:41,314 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 477 transitions. [2023-08-26 15:30:41,315 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:30:41,315 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 477 transitions. [2023-08-26 15:30:41,316 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 15:30:41,318 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 15:30:41,318 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 15:30:41,318 INFO L175 Difference]: Start difference. First operand has 46 places, 25 transitions, 125 flow. Second operand 9 states and 477 transitions. [2023-08-26 15:30:41,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 36 transitions, 235 flow [2023-08-26 15:30:41,319 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 15:30:41,320 INFO L231 Difference]: Finished difference. Result has 53 places, 28 transitions, 159 flow [2023-08-26 15:30:41,320 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 15:30:41,321 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 27 predicate places. [2023-08-26 15:30:41,321 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 28 transitions, 159 flow [2023-08-26 15:30:41,321 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 15:30:41,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:30:41,321 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:30:41,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-26 15:30:41,322 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 15:30:41,322 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:30:41,322 INFO L85 PathProgramCache]: Analyzing trace with hash -845916990, now seen corresponding path program 2 times [2023-08-26 15:30:41,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:30:41,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344588658] [2023-08-26 15:30:41,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:30:41,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:30:41,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:30:41,459 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 15:30:41,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:30:41,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344588658] [2023-08-26 15:30:41,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344588658] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:30:41,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:30:41,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-26 15:30:41,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794077101] [2023-08-26 15:30:41,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:30:41,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-26 15:30:41,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:30:41,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-26 15:30:41,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-08-26 15:30:41,461 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 169 [2023-08-26 15:30:41,462 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 15:30:41,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:30:41,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 169 [2023-08-26 15:30:41,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:30:41,533 INFO L124 PetriNetUnfolderBase]: 6/38 cut-off events. [2023-08-26 15:30:41,533 INFO L125 PetriNetUnfolderBase]: For 88/88 co-relation queries the response was YES. [2023-08-26 15:30:41,533 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 15:30:41,534 INFO L140 encePairwiseOnDemand]: 161/169 looper letters, 18 selfloop transitions, 3 changer transitions 11/32 dead transitions. [2023-08-26 15:30:41,534 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 32 transitions, 230 flow [2023-08-26 15:30:41,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 15:30:41,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 15:30:41,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 373 transitions. [2023-08-26 15:30:41,535 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3153000845308538 [2023-08-26 15:30:41,536 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 373 transitions. [2023-08-26 15:30:41,536 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 373 transitions. [2023-08-26 15:30:41,536 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:30:41,536 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 373 transitions. [2023-08-26 15:30:41,537 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 15:30:41,538 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 15:30:41,539 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 15:30:41,539 INFO L175 Difference]: Start difference. First operand has 53 places, 28 transitions, 159 flow. Second operand 7 states and 373 transitions. [2023-08-26 15:30:41,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 32 transitions, 230 flow [2023-08-26 15:30:41,540 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 15:30:41,541 INFO L231 Difference]: Finished difference. Result has 54 places, 21 transitions, 115 flow [2023-08-26 15:30:41,541 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 15:30:41,541 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 28 predicate places. [2023-08-26 15:30:41,542 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 21 transitions, 115 flow [2023-08-26 15:30:41,542 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 15:30:41,542 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:30:41,542 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:30:41,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-26 15:30:41,542 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 15:30:41,543 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:30:41,543 INFO L85 PathProgramCache]: Analyzing trace with hash -1895238780, now seen corresponding path program 3 times [2023-08-26 15:30:41,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:30:41,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375817350] [2023-08-26 15:30:41,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:30:41,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:30:41,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:30:41,673 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 15:30:41,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:30:41,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375817350] [2023-08-26 15:30:41,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375817350] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:30:41,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:30:41,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 15:30:41,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939981761] [2023-08-26 15:30:41,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:30:41,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 15:30:41,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:30:41,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 15:30:41,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-08-26 15:30:41,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 169 [2023-08-26 15:30:41,678 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 15:30:41,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:30:41,679 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 169 [2023-08-26 15:30:41,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:30:41,721 INFO L124 PetriNetUnfolderBase]: 1/20 cut-off events. [2023-08-26 15:30:41,722 INFO L125 PetriNetUnfolderBase]: For 63/63 co-relation queries the response was YES. [2023-08-26 15:30:41,722 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 15:30:41,722 INFO L140 encePairwiseOnDemand]: 164/169 looper letters, 0 selfloop transitions, 0 changer transitions 20/20 dead transitions. [2023-08-26 15:30:41,722 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 20 transitions, 149 flow [2023-08-26 15:30:41,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 15:30:41,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 15:30:41,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 261 transitions. [2023-08-26 15:30:41,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3088757396449704 [2023-08-26 15:30:41,723 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 261 transitions. [2023-08-26 15:30:41,724 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 261 transitions. [2023-08-26 15:30:41,724 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:30:41,724 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 261 transitions. [2023-08-26 15:30:41,725 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 15:30:41,726 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 15:30:41,726 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 15:30:41,726 INFO L175 Difference]: Start difference. First operand has 54 places, 21 transitions, 115 flow. Second operand 5 states and 261 transitions. [2023-08-26 15:30:41,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 20 transitions, 149 flow [2023-08-26 15:30:41,727 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 15:30:41,728 INFO L231 Difference]: Finished difference. Result has 42 places, 0 transitions, 0 flow [2023-08-26 15:30:41,728 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 15:30:41,729 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 16 predicate places. [2023-08-26 15:30:41,729 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 0 transitions, 0 flow [2023-08-26 15:30:41,729 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 15:30:41,731 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 15 remaining) [2023-08-26 15:30:41,732 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 15 remaining) [2023-08-26 15:30:41,732 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 15 remaining) [2023-08-26 15:30:41,732 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 15 remaining) [2023-08-26 15:30:41,732 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 15 remaining) [2023-08-26 15:30:41,732 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 15 remaining) [2023-08-26 15:30:41,732 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 15 remaining) [2023-08-26 15:30:41,732 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 15 remaining) [2023-08-26 15:30:41,733 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 15 remaining) [2023-08-26 15:30:41,733 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 15 remaining) [2023-08-26 15:30:41,733 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 15 remaining) [2023-08-26 15:30:41,733 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 15 remaining) [2023-08-26 15:30:41,733 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 15 remaining) [2023-08-26 15:30:41,733 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 15 remaining) [2023-08-26 15:30:41,733 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 15 remaining) [2023-08-26 15:30:41,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-26 15:30:41,734 INFO L445 BasicCegarLoop]: Path program histogram: [3, 2, 2, 1, 1, 1] [2023-08-26 15:30:41,738 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-26 15:30:41,738 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-26 15:30:41,742 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 03:30:41 BasicIcfg [2023-08-26 15:30:41,742 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-26 15:30:41,744 INFO L158 Benchmark]: Toolchain (without parser) took 7010.86ms. Allocated memory was 369.1MB in the beginning and 444.6MB in the end (delta: 75.5MB). Free memory was 343.7MB in the beginning and 234.9MB in the end (delta: 108.8MB). Peak memory consumption was 185.3MB. Max. memory is 16.0GB. [2023-08-26 15:30:41,744 INFO L158 Benchmark]: CDTParser took 0.26ms. Allocated memory is still 369.1MB. Free memory is still 345.7MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 15:30:41,745 INFO L158 Benchmark]: CACSL2BoogieTranslator took 604.78ms. Allocated memory is still 369.1MB. Free memory was 343.7MB in the beginning and 316.0MB in the end (delta: 27.7MB). Peak memory consumption was 27.3MB. Max. memory is 16.0GB. [2023-08-26 15:30:41,745 INFO L158 Benchmark]: Boogie Procedure Inliner took 43.10ms. Allocated memory is still 369.1MB. Free memory was 316.0MB in the beginning and 313.3MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 15:30:41,745 INFO L158 Benchmark]: Boogie Preprocessor took 24.57ms. Allocated memory is still 369.1MB. Free memory was 313.3MB in the beginning and 311.8MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 15:30:41,745 INFO L158 Benchmark]: RCFGBuilder took 356.73ms. Allocated memory is still 369.1MB. Free memory was 311.8MB in the beginning and 297.1MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. [2023-08-26 15:30:41,746 INFO L158 Benchmark]: TraceAbstraction took 5974.81ms. Allocated memory was 369.1MB in the beginning and 444.6MB in the end (delta: 75.5MB). Free memory was 296.5MB in the beginning and 234.9MB in the end (delta: 61.6MB). Peak memory consumption was 139.2MB. Max. memory is 16.0GB. [2023-08-26 15:30:41,747 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26ms. Allocated memory is still 369.1MB. Free memory is still 345.7MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 604.78ms. Allocated memory is still 369.1MB. Free memory was 343.7MB in the beginning and 316.0MB in the end (delta: 27.7MB). Peak memory consumption was 27.3MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 43.10ms. Allocated memory is still 369.1MB. Free memory was 316.0MB in the beginning and 313.3MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 24.57ms. Allocated memory is still 369.1MB. Free memory was 313.3MB in the beginning and 311.8MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 356.73ms. Allocated memory is still 369.1MB. Free memory was 311.8MB in the beginning and 297.1MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. * TraceAbstraction took 5974.81ms. Allocated memory was 369.1MB in the beginning and 444.6MB in the end (delta: 75.5MB). Free memory was 296.5MB in the beginning and 234.9MB in the end (delta: 61.6MB). Peak memory consumption was 139.2MB. 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: 2.3s, 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: 5.8s, OverallIterations: 10, TraceHistogramMax: 10, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.4s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 111 SdHoareTripleChecker+Valid, 0.3s 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: 0.1s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.4s 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 15:30:41,768 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...