/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.pointer.base.address.is.valid.at.dereference ASSERTandASSUME --cacsl2boogietranslator.pointer.to.allocated.memory.at.dereference ASSERTandASSUME --cacsl2boogietranslator.check.array.bounds.for.arrays.that.are.off.heap ASSERTandASSUME --cacsl2boogietranslator.check.if.freed.pointer.was.valid true --cacsl2boogietranslator.adapt.memory.model.on.pointer.casts.if.necessary true -i ../../../trunk/examples/svcomp/pthread/stack_longest-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 11:40:14,816 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 11:40:14,886 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 11:40:14,894 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 11:40:14,895 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 11:40:14,934 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 11:40:14,935 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 11:40:14,935 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 11:40:14,936 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 11:40:14,939 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 11:40:14,940 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 11:40:14,940 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 11:40:14,940 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 11:40:14,941 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 11:40:14,942 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 11:40:14,942 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 11:40:14,942 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 11:40:14,942 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 11:40:14,942 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 11:40:14,943 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 11:40:14,943 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 11:40:14,944 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 11:40:14,944 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 11:40:14,944 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 11:40:14,945 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 11:40:14,945 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 11:40:14,945 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 11:40:14,945 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 11:40:14,946 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 11:40:14,946 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 11:40:14,947 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 11:40:14,947 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 11:40:14,947 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 11:40:14,947 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 11:40:14,947 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 11:40:14,948 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 11:40:15,275 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 11:40:15,293 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 11:40:15,295 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 11:40:15,295 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 11:40:15,296 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 11:40:15,297 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/stack_longest-1.i [2023-08-26 11:40:16,563 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 11:40:16,841 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 11:40:16,841 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack_longest-1.i [2023-08-26 11:40:16,858 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5fe99ea43/f08c064c814a4150b80dec67ac1cab94/FLAGd0ab32ace [2023-08-26 11:40:16,871 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5fe99ea43/f08c064c814a4150b80dec67ac1cab94 [2023-08-26 11:40:16,873 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 11:40:16,874 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 11:40:16,875 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 11:40:16,875 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 11:40:16,878 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 11:40:16,878 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 11:40:16" (1/1) ... [2023-08-26 11:40:16,879 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19604b65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:40:16, skipping insertion in model container [2023-08-26 11:40:16,879 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 11:40:16" (1/1) ... [2023-08-26 11:40:16,924 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 11:40:17,383 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 11:40:17,396 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 11:40:17,424 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [261] [2023-08-26 11:40:17,426 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [261] [2023-08-26 11:40:17,431 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: unsigned short [753] [2023-08-26 11:40:17,463 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 11:40:17,524 INFO L206 MainTranslator]: Completed translation [2023-08-26 11:40:17,525 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:40:17 WrapperNode [2023-08-26 11:40:17,525 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 11:40:17,526 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 11:40:17,526 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 11:40:17,526 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 11:40:17,531 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:40:17" (1/1) ... [2023-08-26 11:40:17,560 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:40:17" (1/1) ... [2023-08-26 11:40:17,593 INFO L138 Inliner]: procedures = 277, calls = 40, calls flagged for inlining = 13, calls inlined = 14, statements flattened = 162 [2023-08-26 11:40:17,594 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 11:40:17,595 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 11:40:17,595 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 11:40:17,595 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 11:40:17,603 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:40:17" (1/1) ... [2023-08-26 11:40:17,604 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:40:17" (1/1) ... [2023-08-26 11:40:17,607 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:40:17" (1/1) ... [2023-08-26 11:40:17,607 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:40:17" (1/1) ... [2023-08-26 11:40:17,615 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:40:17" (1/1) ... [2023-08-26 11:40:17,618 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:40:17" (1/1) ... [2023-08-26 11:40:17,619 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:40:17" (1/1) ... [2023-08-26 11:40:17,633 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:40:17" (1/1) ... [2023-08-26 11:40:17,635 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 11:40:17,636 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 11:40:17,636 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 11:40:17,637 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 11:40:17,637 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:40:17" (1/1) ... [2023-08-26 11:40:17,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 11:40:17,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 11:40:17,671 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 11:40:17,683 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 11:40:17,710 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-08-26 11:40:17,710 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-08-26 11:40:17,710 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-08-26 11:40:17,710 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-08-26 11:40:17,711 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 11:40:17,711 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 11:40:17,711 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-26 11:40:17,711 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 11:40:17,711 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-26 11:40:17,711 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 11:40:17,711 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 11:40:17,712 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 11:40:17,712 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 11:40:17,713 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 11:40:17,870 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 11:40:17,872 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 11:40:18,087 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 11:40:18,095 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 11:40:18,095 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-26 11:40:18,097 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 11:40:18 BoogieIcfgContainer [2023-08-26 11:40:18,097 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 11:40:18,098 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 11:40:18,099 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 11:40:18,101 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 11:40:18,102 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 11:40:16" (1/3) ... [2023-08-26 11:40:18,102 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a2362a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 11:40:18, skipping insertion in model container [2023-08-26 11:40:18,102 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:40:17" (2/3) ... [2023-08-26 11:40:18,102 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a2362a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 11:40:18, skipping insertion in model container [2023-08-26 11:40:18,103 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 11:40:18" (3/3) ... [2023-08-26 11:40:18,104 INFO L112 eAbstractionObserver]: Analyzing ICFG stack_longest-1.i [2023-08-26 11:40:18,119 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 11:40:18,119 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 14 error locations. [2023-08-26 11:40:18,119 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 11:40:18,219 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-26 11:40:18,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 173 places, 178 transitions, 372 flow [2023-08-26 11:40:18,322 INFO L124 PetriNetUnfolderBase]: 12/176 cut-off events. [2023-08-26 11:40:18,322 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 11:40:18,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 185 conditions, 176 events. 12/176 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 486 event pairs, 0 based on Foata normal form. 0/150 useless extension candidates. Maximal degree in co-relation 134. Up to 3 conditions per place. [2023-08-26 11:40:18,333 INFO L82 GeneralOperation]: Start removeDead. Operand has 173 places, 178 transitions, 372 flow [2023-08-26 11:40:18,337 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 162 places, 167 transitions, 343 flow [2023-08-26 11:40:18,340 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 11:40:18,348 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 162 places, 167 transitions, 343 flow [2023-08-26 11:40:18,351 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 162 places, 167 transitions, 343 flow [2023-08-26 11:40:18,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 162 places, 167 transitions, 343 flow [2023-08-26 11:40:18,393 INFO L124 PetriNetUnfolderBase]: 12/167 cut-off events. [2023-08-26 11:40:18,393 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 11:40:18,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 175 conditions, 167 events. 12/167 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 404 event pairs, 0 based on Foata normal form. 0/141 useless extension candidates. Maximal degree in co-relation 134. Up to 3 conditions per place. [2023-08-26 11:40:18,400 INFO L119 LiptonReduction]: Number of co-enabled transitions 9822 [2023-08-26 11:40:22,752 INFO L134 LiptonReduction]: Checked pairs total: 14891 [2023-08-26 11:40:22,752 INFO L136 LiptonReduction]: Total number of compositions: 181 [2023-08-26 11:40:22,764 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 11:40:22,769 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;@179acfb2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 11:40:22,769 INFO L358 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2023-08-26 11:40:22,771 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 11:40:22,771 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2023-08-26 11:40:22,771 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 11:40:22,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:40:22,772 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-26 11:40:22,773 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 11:40:22,777 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:40:22,777 INFO L85 PathProgramCache]: Analyzing trace with hash 747, now seen corresponding path program 1 times [2023-08-26 11:40:22,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:40:22,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874067023] [2023-08-26 11:40:22,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:40:22,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:40:22,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:40:22,889 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 11:40:22,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:40:22,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874067023] [2023-08-26 11:40:22,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874067023] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:40:22,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:40:22,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-26 11:40:22,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620140739] [2023-08-26 11:40:22,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:40:22,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 11:40:22,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:40:22,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 11:40:22,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 11:40:22,935 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 359 [2023-08-26 11:40:22,937 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 45 transitions, 99 flow. Second operand has 2 states, 2 states have (on average 165.5) internal successors, (331), 2 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:40:22,937 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:40:22,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 359 [2023-08-26 11:40:22,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:40:23,197 INFO L124 PetriNetUnfolderBase]: 1353/2126 cut-off events. [2023-08-26 11:40:23,197 INFO L125 PetriNetUnfolderBase]: For 46/46 co-relation queries the response was YES. [2023-08-26 11:40:23,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4247 conditions, 2126 events. 1353/2126 cut-off events. For 46/46 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 9992 event pairs, 1085 based on Foata normal form. 0/1196 useless extension candidates. Maximal degree in co-relation 4000. Up to 2079 conditions per place. [2023-08-26 11:40:23,213 INFO L140 encePairwiseOnDemand]: 357/359 looper letters, 41 selfloop transitions, 0 changer transitions 0/43 dead transitions. [2023-08-26 11:40:23,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 43 transitions, 177 flow [2023-08-26 11:40:23,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 11:40:23,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 11:40:23,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 373 transitions. [2023-08-26 11:40:23,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5194986072423399 [2023-08-26 11:40:23,235 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 373 transitions. [2023-08-26 11:40:23,235 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 373 transitions. [2023-08-26 11:40:23,238 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:40:23,240 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 373 transitions. [2023-08-26 11:40:23,245 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 186.5) internal successors, (373), 2 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 11:40:23,249 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 359.0) internal successors, (1077), 3 states have internal predecessors, (1077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:40:23,250 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 359.0) internal successors, (1077), 3 states have internal predecessors, (1077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:40:23,252 INFO L175 Difference]: Start difference. First operand has 47 places, 45 transitions, 99 flow. Second operand 2 states and 373 transitions. [2023-08-26 11:40:23,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 43 transitions, 177 flow [2023-08-26 11:40:23,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 43 transitions, 172 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-26 11:40:23,258 INFO L231 Difference]: Finished difference. Result has 43 places, 43 transitions, 90 flow [2023-08-26 11:40:23,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=90, PETRI_PLACES=43, PETRI_TRANSITIONS=43} [2023-08-26 11:40:23,263 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, -4 predicate places. [2023-08-26 11:40:23,263 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 43 transitions, 90 flow [2023-08-26 11:40:23,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 165.5) internal successors, (331), 2 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:40:23,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:40:23,263 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 11:40:23,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 11:40:23,264 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 11:40:23,265 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:40:23,265 INFO L85 PathProgramCache]: Analyzing trace with hash 737049, now seen corresponding path program 1 times [2023-08-26 11:40:23,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:40:23,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054823303] [2023-08-26 11:40:23,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:40:23,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:40:23,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:40:23,412 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 11:40:23,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:40:23,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054823303] [2023-08-26 11:40:23,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054823303] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:40:23,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:40:23,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 11:40:23,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772187453] [2023-08-26 11:40:23,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:40:23,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:40:23,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:40:23,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:40:23,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:40:23,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 359 [2023-08-26 11:40:23,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 43 transitions, 90 flow. Second operand has 3 states, 3 states have (on average 141.0) internal successors, (423), 3 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:40:23,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:40:23,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 359 [2023-08-26 11:40:23,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:40:23,623 INFO L124 PetriNetUnfolderBase]: 1325/2072 cut-off events. [2023-08-26 11:40:23,624 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2023-08-26 11:40:23,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4125 conditions, 2072 events. 1325/2072 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 9646 event pairs, 1062 based on Foata normal form. 0/1177 useless extension candidates. Maximal degree in co-relation 4122. Up to 2025 conditions per place. [2023-08-26 11:40:23,634 INFO L140 encePairwiseOnDemand]: 356/359 looper letters, 38 selfloop transitions, 1 changer transitions 0/41 dead transitions. [2023-08-26 11:40:23,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 41 transitions, 164 flow [2023-08-26 11:40:23,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:40:23,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:40:23,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 461 transitions. [2023-08-26 11:40:23,637 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42804085422469823 [2023-08-26 11:40:23,637 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 461 transitions. [2023-08-26 11:40:23,637 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 461 transitions. [2023-08-26 11:40:23,637 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:40:23,638 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 461 transitions. [2023-08-26 11:40:23,639 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 153.66666666666666) internal successors, (461), 3 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:40:23,641 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 359.0) internal successors, (1436), 4 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:40:23,642 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 359.0) internal successors, (1436), 4 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:40:23,642 INFO L175 Difference]: Start difference. First operand has 43 places, 43 transitions, 90 flow. Second operand 3 states and 461 transitions. [2023-08-26 11:40:23,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 41 transitions, 164 flow [2023-08-26 11:40:23,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 41 transitions, 164 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 11:40:23,644 INFO L231 Difference]: Finished difference. Result has 43 places, 41 transitions, 88 flow [2023-08-26 11:40:23,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=43, PETRI_TRANSITIONS=41} [2023-08-26 11:40:23,644 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, -4 predicate places. [2023-08-26 11:40:23,645 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 41 transitions, 88 flow [2023-08-26 11:40:23,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 141.0) internal successors, (423), 3 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:40:23,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:40:23,645 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 11:40:23,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 11:40:23,646 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 11:40:23,646 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:40:23,646 INFO L85 PathProgramCache]: Analyzing trace with hash 737047, now seen corresponding path program 1 times [2023-08-26 11:40:23,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:40:23,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69684466] [2023-08-26 11:40:23,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:40:23,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:40:23,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:40:23,767 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 11:40:23,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:40:23,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69684466] [2023-08-26 11:40:23,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69684466] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:40:23,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:40:23,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 11:40:23,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260254841] [2023-08-26 11:40:23,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:40:23,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:40:23,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:40:23,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:40:23,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:40:23,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 359 [2023-08-26 11:40:23,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 41 transitions, 88 flow. Second operand has 3 states, 3 states have (on average 143.0) internal successors, (429), 3 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:40:23,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:40:23,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 359 [2023-08-26 11:40:23,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:40:23,934 INFO L124 PetriNetUnfolderBase]: 1297/2018 cut-off events. [2023-08-26 11:40:23,934 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2023-08-26 11:40:23,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4020 conditions, 2018 events. 1297/2018 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 9305 event pairs, 1039 based on Foata normal form. 0/1158 useless extension candidates. Maximal degree in co-relation 4016. Up to 1972 conditions per place. [2023-08-26 11:40:23,947 INFO L140 encePairwiseOnDemand]: 356/359 looper letters, 36 selfloop transitions, 1 changer transitions 0/39 dead transitions. [2023-08-26 11:40:23,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 39 transitions, 158 flow [2023-08-26 11:40:23,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:40:23,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:40:23,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 465 transitions. [2023-08-26 11:40:23,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43175487465181056 [2023-08-26 11:40:23,949 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 465 transitions. [2023-08-26 11:40:23,949 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 465 transitions. [2023-08-26 11:40:23,950 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:40:23,950 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 465 transitions. [2023-08-26 11:40:23,951 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 155.0) internal successors, (465), 3 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:40:23,953 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 359.0) internal successors, (1436), 4 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:40:23,953 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 359.0) internal successors, (1436), 4 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:40:23,954 INFO L175 Difference]: Start difference. First operand has 43 places, 41 transitions, 88 flow. Second operand 3 states and 465 transitions. [2023-08-26 11:40:23,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 39 transitions, 158 flow [2023-08-26 11:40:23,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 39 transitions, 157 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 11:40:23,955 INFO L231 Difference]: Finished difference. Result has 42 places, 39 transitions, 85 flow [2023-08-26 11:40:23,955 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=83, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=85, PETRI_PLACES=42, PETRI_TRANSITIONS=39} [2023-08-26 11:40:23,956 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, -5 predicate places. [2023-08-26 11:40:23,956 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 39 transitions, 85 flow [2023-08-26 11:40:23,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 143.0) internal successors, (429), 3 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:40:23,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:40:23,957 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 11:40:23,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 11:40:23,957 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 11:40:23,957 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:40:23,957 INFO L85 PathProgramCache]: Analyzing trace with hash 708320309, now seen corresponding path program 1 times [2023-08-26 11:40:23,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:40:23,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339815818] [2023-08-26 11:40:23,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:40:23,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:40:23,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:40:24,035 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 11:40:24,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:40:24,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339815818] [2023-08-26 11:40:24,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339815818] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:40:24,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:40:24,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 11:40:24,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175268038] [2023-08-26 11:40:24,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:40:24,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 11:40:24,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:40:24,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 11:40:24,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 11:40:24,038 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 359 [2023-08-26 11:40:24,039 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 39 transitions, 85 flow. Second operand has 4 states, 4 states have (on average 138.25) internal successors, (553), 4 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:40:24,039 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:40:24,039 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 359 [2023-08-26 11:40:24,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:40:24,207 INFO L124 PetriNetUnfolderBase]: 948/1502 cut-off events. [2023-08-26 11:40:24,207 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2023-08-26 11:40:24,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3000 conditions, 1502 events. 948/1502 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 6649 event pairs, 752 based on Foata normal form. 0/930 useless extension candidates. Maximal degree in co-relation 2996. Up to 1467 conditions per place. [2023-08-26 11:40:24,215 INFO L140 encePairwiseOnDemand]: 357/359 looper letters, 35 selfloop transitions, 1 changer transitions 0/38 dead transitions. [2023-08-26 11:40:24,216 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 38 transitions, 155 flow [2023-08-26 11:40:24,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:40:24,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:40:24,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 448 transitions. [2023-08-26 11:40:24,218 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4159702878365831 [2023-08-26 11:40:24,218 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 448 transitions. [2023-08-26 11:40:24,218 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 448 transitions. [2023-08-26 11:40:24,218 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:40:24,218 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 448 transitions. [2023-08-26 11:40:24,220 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 149.33333333333334) internal successors, (448), 3 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:40:24,222 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 359.0) internal successors, (1436), 4 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:40:24,222 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 359.0) internal successors, (1436), 4 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:40:24,223 INFO L175 Difference]: Start difference. First operand has 42 places, 39 transitions, 85 flow. Second operand 3 states and 448 transitions. [2023-08-26 11:40:24,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 38 transitions, 155 flow [2023-08-26 11:40:24,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 38 transitions, 154 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 11:40:24,224 INFO L231 Difference]: Finished difference. Result has 42 places, 38 transitions, 84 flow [2023-08-26 11:40:24,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=84, PETRI_PLACES=42, PETRI_TRANSITIONS=38} [2023-08-26 11:40:24,225 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, -5 predicate places. [2023-08-26 11:40:24,225 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 38 transitions, 84 flow [2023-08-26 11:40:24,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 138.25) internal successors, (553), 4 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:40:24,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:40:24,226 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 11:40:24,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 11:40:24,226 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 11:40:24,227 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:40:24,227 INFO L85 PathProgramCache]: Analyzing trace with hash 708320310, now seen corresponding path program 1 times [2023-08-26 11:40:24,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:40:24,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142402188] [2023-08-26 11:40:24,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:40:24,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:40:24,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:40:24,304 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 11:40:24,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:40:24,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142402188] [2023-08-26 11:40:24,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142402188] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:40:24,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:40:24,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 11:40:24,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48905777] [2023-08-26 11:40:24,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:40:24,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:40:24,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:40:24,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:40:24,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:40:24,307 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 359 [2023-08-26 11:40:24,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 38 transitions, 84 flow. Second operand has 3 states, 3 states have (on average 143.66666666666666) internal successors, (431), 3 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:40:24,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:40:24,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 359 [2023-08-26 11:40:24,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:40:24,422 INFO L124 PetriNetUnfolderBase]: 599/986 cut-off events. [2023-08-26 11:40:24,423 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2023-08-26 11:40:24,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1980 conditions, 986 events. 599/986 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 4178 event pairs, 465 based on Foata normal form. 0/702 useless extension candidates. Maximal degree in co-relation 1976. Up to 962 conditions per place. [2023-08-26 11:40:24,428 INFO L140 encePairwiseOnDemand]: 357/359 looper letters, 34 selfloop transitions, 1 changer transitions 0/37 dead transitions. [2023-08-26 11:40:24,429 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 37 transitions, 152 flow [2023-08-26 11:40:24,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:40:24,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:40:24,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 462 transitions. [2023-08-26 11:40:24,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42896935933147634 [2023-08-26 11:40:24,431 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 462 transitions. [2023-08-26 11:40:24,431 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 462 transitions. [2023-08-26 11:40:24,431 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:40:24,431 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 462 transitions. [2023-08-26 11:40:24,433 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 154.0) internal successors, (462), 3 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:40:24,435 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 359.0) internal successors, (1436), 4 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:40:24,435 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 359.0) internal successors, (1436), 4 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:40:24,436 INFO L175 Difference]: Start difference. First operand has 42 places, 38 transitions, 84 flow. Second operand 3 states and 462 transitions. [2023-08-26 11:40:24,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 37 transitions, 152 flow [2023-08-26 11:40:24,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 37 transitions, 151 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 11:40:24,437 INFO L231 Difference]: Finished difference. Result has 42 places, 37 transitions, 83 flow [2023-08-26 11:40:24,438 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=81, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=83, PETRI_PLACES=42, PETRI_TRANSITIONS=37} [2023-08-26 11:40:24,438 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, -5 predicate places. [2023-08-26 11:40:24,438 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 37 transitions, 83 flow [2023-08-26 11:40:24,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 143.66666666666666) internal successors, (431), 3 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:40:24,439 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:40:24,439 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-26 11:40:24,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 11:40:24,439 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 11:40:24,440 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:40:24,440 INFO L85 PathProgramCache]: Analyzing trace with hash 483882604, now seen corresponding path program 1 times [2023-08-26 11:40:24,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:40:24,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390648634] [2023-08-26 11:40:24,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:40:24,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:40:24,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:40:24,598 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 11:40:24,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:40:24,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390648634] [2023-08-26 11:40:24,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390648634] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:40:24,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:40:24,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 11:40:24,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474684972] [2023-08-26 11:40:24,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:40:24,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 11:40:24,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:40:24,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 11:40:24,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-26 11:40:24,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 359 [2023-08-26 11:40:24,601 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 37 transitions, 83 flow. Second operand has 5 states, 5 states have (on average 138.2) internal successors, (691), 5 states have internal predecessors, (691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:40:24,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:40:24,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 359 [2023-08-26 11:40:24,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:40:24,793 INFO L124 PetriNetUnfolderBase]: 674/1125 cut-off events. [2023-08-26 11:40:24,793 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2023-08-26 11:40:24,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2251 conditions, 1125 events. 674/1125 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 5290 event pairs, 114 based on Foata normal form. 0/835 useless extension candidates. Maximal degree in co-relation 2247. Up to 741 conditions per place. [2023-08-26 11:40:24,799 INFO L140 encePairwiseOnDemand]: 354/359 looper letters, 69 selfloop transitions, 5 changer transitions 0/76 dead transitions. [2023-08-26 11:40:24,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 76 transitions, 314 flow [2023-08-26 11:40:24,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 11:40:24,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 11:40:24,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 760 transitions. [2023-08-26 11:40:24,801 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4233983286908078 [2023-08-26 11:40:24,802 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 760 transitions. [2023-08-26 11:40:24,802 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 760 transitions. [2023-08-26 11:40:24,802 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:40:24,802 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 760 transitions. [2023-08-26 11:40:24,804 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 152.0) internal successors, (760), 5 states have internal predecessors, (760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:40:24,807 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 359.0) internal successors, (2154), 6 states have internal predecessors, (2154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:40:24,808 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 359.0) internal successors, (2154), 6 states have internal predecessors, (2154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:40:24,808 INFO L175 Difference]: Start difference. First operand has 42 places, 37 transitions, 83 flow. Second operand 5 states and 760 transitions. [2023-08-26 11:40:24,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 76 transitions, 314 flow [2023-08-26 11:40:24,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 76 transitions, 313 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 11:40:24,809 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 92 flow [2023-08-26 11:40:24,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=92, PETRI_PLACES=44, PETRI_TRANSITIONS=37} [2023-08-26 11:40:24,810 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, -3 predicate places. [2023-08-26 11:40:24,810 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 92 flow [2023-08-26 11:40:24,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 138.2) internal successors, (691), 5 states have internal predecessors, (691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:40:24,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:40:24,811 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-26 11:40:24,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 11:40:24,811 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 11:40:24,812 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:40:24,812 INFO L85 PathProgramCache]: Analyzing trace with hash 483882603, now seen corresponding path program 1 times [2023-08-26 11:40:24,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:40:24,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438694236] [2023-08-26 11:40:24,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:40:24,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:40:24,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:40:25,045 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 11:40:25,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:40:25,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438694236] [2023-08-26 11:40:25,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438694236] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:40:25,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:40:25,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 11:40:25,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455378224] [2023-08-26 11:40:25,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:40:25,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 11:40:25,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:40:25,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 11:40:25,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-26 11:40:25,048 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 359 [2023-08-26 11:40:25,048 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 92 flow. Second operand has 5 states, 5 states have (on average 131.2) internal successors, (656), 5 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:40:25,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:40:25,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 359 [2023-08-26 11:40:25,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:40:25,334 INFO L124 PetriNetUnfolderBase]: 988/1617 cut-off events. [2023-08-26 11:40:25,334 INFO L125 PetriNetUnfolderBase]: For 73/73 co-relation queries the response was YES. [2023-08-26 11:40:25,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3410 conditions, 1617 events. 988/1617 cut-off events. For 73/73 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 7224 event pairs, 128 based on Foata normal form. 0/1319 useless extension candidates. Maximal degree in co-relation 3406. Up to 1170 conditions per place. [2023-08-26 11:40:25,343 INFO L140 encePairwiseOnDemand]: 352/359 looper letters, 81 selfloop transitions, 7 changer transitions 0/89 dead transitions. [2023-08-26 11:40:25,343 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 89 transitions, 383 flow [2023-08-26 11:40:25,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 11:40:25,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 11:40:25,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 739 transitions. [2023-08-26 11:40:25,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4116991643454039 [2023-08-26 11:40:25,346 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 739 transitions. [2023-08-26 11:40:25,346 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 739 transitions. [2023-08-26 11:40:25,346 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:40:25,346 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 739 transitions. [2023-08-26 11:40:25,348 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 147.8) internal successors, (739), 5 states have internal predecessors, (739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:40:25,350 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 359.0) internal successors, (2154), 6 states have internal predecessors, (2154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:40:25,351 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 359.0) internal successors, (2154), 6 states have internal predecessors, (2154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:40:25,351 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 92 flow. Second operand 5 states and 739 transitions. [2023-08-26 11:40:25,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 89 transitions, 383 flow [2023-08-26 11:40:25,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 89 transitions, 376 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 11:40:25,353 INFO L231 Difference]: Finished difference. Result has 49 places, 43 transitions, 136 flow [2023-08-26 11:40:25,354 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=87, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=136, PETRI_PLACES=49, PETRI_TRANSITIONS=43} [2023-08-26 11:40:25,354 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 2 predicate places. [2023-08-26 11:40:25,354 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 43 transitions, 136 flow [2023-08-26 11:40:25,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 131.2) internal successors, (656), 5 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:40:25,355 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:40:25,355 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:40:25,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 11:40:25,355 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 11:40:25,356 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:40:25,356 INFO L85 PathProgramCache]: Analyzing trace with hash -594726360, now seen corresponding path program 1 times [2023-08-26 11:40:25,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:40:25,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051147040] [2023-08-26 11:40:25,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:40:25,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:40:25,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:40:25,399 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 11:40:25,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:40:25,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051147040] [2023-08-26 11:40:25,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051147040] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:40:25,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:40:25,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 11:40:25,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436996059] [2023-08-26 11:40:25,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:40:25,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:40:25,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:40:25,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:40:25,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:40:25,402 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 359 [2023-08-26 11:40:25,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 43 transitions, 136 flow. Second operand has 3 states, 3 states have (on average 164.0) internal successors, (492), 3 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:40:25,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:40:25,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 359 [2023-08-26 11:40:25,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:40:25,548 INFO L124 PetriNetUnfolderBase]: 706/1179 cut-off events. [2023-08-26 11:40:25,548 INFO L125 PetriNetUnfolderBase]: For 202/202 co-relation queries the response was YES. [2023-08-26 11:40:25,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2670 conditions, 1179 events. 706/1179 cut-off events. For 202/202 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 4675 event pairs, 312 based on Foata normal form. 0/955 useless extension candidates. Maximal degree in co-relation 2663. Up to 883 conditions per place. [2023-08-26 11:40:25,554 INFO L140 encePairwiseOnDemand]: 356/359 looper letters, 48 selfloop transitions, 2 changer transitions 3/54 dead transitions. [2023-08-26 11:40:25,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 54 transitions, 255 flow [2023-08-26 11:40:25,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:40:25,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:40:25,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 537 transitions. [2023-08-26 11:40:25,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4986072423398329 [2023-08-26 11:40:25,557 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 537 transitions. [2023-08-26 11:40:25,557 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 537 transitions. [2023-08-26 11:40:25,557 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:40:25,557 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 537 transitions. [2023-08-26 11:40:25,558 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 179.0) internal successors, (537), 3 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:40:25,560 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 359.0) internal successors, (1436), 4 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:40:25,560 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 359.0) internal successors, (1436), 4 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:40:25,561 INFO L175 Difference]: Start difference. First operand has 49 places, 43 transitions, 136 flow. Second operand 3 states and 537 transitions. [2023-08-26 11:40:25,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 54 transitions, 255 flow [2023-08-26 11:40:25,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 54 transitions, 247 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-26 11:40:25,563 INFO L231 Difference]: Finished difference. Result has 49 places, 40 transitions, 120 flow [2023-08-26 11:40:25,564 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=120, PETRI_PLACES=49, PETRI_TRANSITIONS=40} [2023-08-26 11:40:25,564 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 2 predicate places. [2023-08-26 11:40:25,564 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 40 transitions, 120 flow [2023-08-26 11:40:25,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 164.0) internal successors, (492), 3 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:40:25,565 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:40:25,565 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:40:25,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-26 11:40:25,565 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t1Err2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 11:40:25,565 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:40:25,565 INFO L85 PathProgramCache]: Analyzing trace with hash 1517459765, now seen corresponding path program 1 times [2023-08-26 11:40:25,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:40:25,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144929920] [2023-08-26 11:40:25,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:40:25,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:40:25,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:40:25,601 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 11:40:25,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:40:25,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144929920] [2023-08-26 11:40:25,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144929920] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:40:25,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:40:25,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 11:40:25,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070213249] [2023-08-26 11:40:25,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:40:25,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:40:25,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:40:25,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:40:25,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:40:25,603 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 359 [2023-08-26 11:40:25,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 40 transitions, 120 flow. Second operand has 3 states, 3 states have (on average 162.0) internal successors, (486), 3 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:40:25,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:40:25,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 359 [2023-08-26 11:40:25,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:40:25,738 INFO L124 PetriNetUnfolderBase]: 674/1127 cut-off events. [2023-08-26 11:40:25,738 INFO L125 PetriNetUnfolderBase]: For 188/188 co-relation queries the response was YES. [2023-08-26 11:40:25,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2594 conditions, 1127 events. 674/1127 cut-off events. For 188/188 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 4432 event pairs, 477 based on Foata normal form. 38/997 useless extension candidates. Maximal degree in co-relation 2587. Up to 1001 conditions per place. [2023-08-26 11:40:25,744 INFO L140 encePairwiseOnDemand]: 356/359 looper letters, 53 selfloop transitions, 4 changer transitions 0/59 dead transitions. [2023-08-26 11:40:25,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 59 transitions, 278 flow [2023-08-26 11:40:25,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:40:25,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:40:25,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 531 transitions. [2023-08-26 11:40:25,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49303621169916434 [2023-08-26 11:40:25,747 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 531 transitions. [2023-08-26 11:40:25,747 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 531 transitions. [2023-08-26 11:40:25,747 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:40:25,747 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 531 transitions. [2023-08-26 11:40:25,748 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 177.0) internal successors, (531), 3 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:40:25,750 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 359.0) internal successors, (1436), 4 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:40:25,750 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 359.0) internal successors, (1436), 4 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:40:25,751 INFO L175 Difference]: Start difference. First operand has 49 places, 40 transitions, 120 flow. Second operand 3 states and 531 transitions. [2023-08-26 11:40:25,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 59 transitions, 278 flow [2023-08-26 11:40:25,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 59 transitions, 276 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 11:40:25,753 INFO L231 Difference]: Finished difference. Result has 51 places, 41 transitions, 138 flow [2023-08-26 11:40:25,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=138, PETRI_PLACES=51, PETRI_TRANSITIONS=41} [2023-08-26 11:40:25,753 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 4 predicate places. [2023-08-26 11:40:25,754 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 41 transitions, 138 flow [2023-08-26 11:40:25,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 162.0) internal successors, (486), 3 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:40:25,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:40:25,754 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:40:25,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-26 11:40:25,754 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t1Err2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 11:40:25,755 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:40:25,755 INFO L85 PathProgramCache]: Analyzing trace with hash 1122937346, now seen corresponding path program 1 times [2023-08-26 11:40:25,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:40:25,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137530753] [2023-08-26 11:40:25,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:40:25,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:40:25,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:40:25,812 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:40:25,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:40:25,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137530753] [2023-08-26 11:40:25,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137530753] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 11:40:25,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427445406] [2023-08-26 11:40:25,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:40:25,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 11:40:25,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 11:40:25,817 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 11:40:25,843 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 11:40:25,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:40:25,924 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-26 11:40:25,928 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 11:40:25,979 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:40:25,980 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 11:40:26,015 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:40:26,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427445406] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 11:40:26,015 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 11:40:26,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2023-08-26 11:40:26,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014881681] [2023-08-26 11:40:26,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 11:40:26,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-26 11:40:26,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:40:26,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-26 11:40:26,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-08-26 11:40:26,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 359 [2023-08-26 11:40:26,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 41 transitions, 138 flow. Second operand has 10 states, 10 states have (on average 156.6) internal successors, (1566), 10 states have internal predecessors, (1566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:40:26,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:40:26,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 359 [2023-08-26 11:40:26,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:40:26,594 INFO L124 PetriNetUnfolderBase]: 2180/3603 cut-off events. [2023-08-26 11:40:26,594 INFO L125 PetriNetUnfolderBase]: For 1321/1321 co-relation queries the response was YES. [2023-08-26 11:40:26,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8565 conditions, 3603 events. 2180/3603 cut-off events. For 1321/1321 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 17901 event pairs, 347 based on Foata normal form. 0/3093 useless extension candidates. Maximal degree in co-relation 8557. Up to 1047 conditions per place. [2023-08-26 11:40:26,613 INFO L140 encePairwiseOnDemand]: 353/359 looper letters, 182 selfloop transitions, 23 changer transitions 0/206 dead transitions. [2023-08-26 11:40:26,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 206 transitions, 981 flow [2023-08-26 11:40:26,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-26 11:40:26,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-26 11:40:26,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1732 transitions. [2023-08-26 11:40:26,618 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48245125348189416 [2023-08-26 11:40:26,618 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1732 transitions. [2023-08-26 11:40:26,618 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1732 transitions. [2023-08-26 11:40:26,619 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:40:26,619 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1732 transitions. [2023-08-26 11:40:26,622 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 173.2) internal successors, (1732), 10 states have internal predecessors, (1732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:40:26,627 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 359.0) internal successors, (3949), 11 states have internal predecessors, (3949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:40:26,628 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 359.0) internal successors, (3949), 11 states have internal predecessors, (3949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:40:26,628 INFO L175 Difference]: Start difference. First operand has 51 places, 41 transitions, 138 flow. Second operand 10 states and 1732 transitions. [2023-08-26 11:40:26,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 206 transitions, 981 flow [2023-08-26 11:40:26,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 206 transitions, 967 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 11:40:26,636 INFO L231 Difference]: Finished difference. Result has 62 places, 66 transitions, 301 flow [2023-08-26 11:40:26,636 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=301, PETRI_PLACES=62, PETRI_TRANSITIONS=66} [2023-08-26 11:40:26,637 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 15 predicate places. [2023-08-26 11:40:26,637 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 66 transitions, 301 flow [2023-08-26 11:40:26,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 156.6) internal successors, (1566), 10 states have internal predecessors, (1566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:40:26,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:40:26,638 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:40:26,644 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-26 11:40:26,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-08-26 11:40:26,844 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 11:40:26,844 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:40:26,844 INFO L85 PathProgramCache]: Analyzing trace with hash 1122935256, now seen corresponding path program 1 times [2023-08-26 11:40:26,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:40:26,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292302750] [2023-08-26 11:40:26,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:40:26,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:40:26,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:40:27,213 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:40:27,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:40:27,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292302750] [2023-08-26 11:40:27,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292302750] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 11:40:27,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645065368] [2023-08-26 11:40:27,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:40:27,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 11:40:27,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 11:40:27,215 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 11:40:27,220 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 11:40:27,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:40:27,314 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 40 conjunts are in the unsatisfiable core [2023-08-26 11:40:27,318 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 11:40:27,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 11:40:27,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 11:40:27,369 INFO L322 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-26 11:40:27,370 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 23 [2023-08-26 11:40:27,395 INFO L322 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2023-08-26 11:40:27,395 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 34 [2023-08-26 11:40:27,585 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:40:27,585 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 11:40:27,753 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:40:27,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645065368] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 11:40:27,754 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 11:40:27,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 5] total 19 [2023-08-26 11:40:27,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778550755] [2023-08-26 11:40:27,754 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 11:40:27,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-26 11:40:27,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:40:27,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-26 11:40:27,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2023-08-26 11:40:27,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 359 [2023-08-26 11:40:27,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 66 transitions, 301 flow. Second operand has 21 states, 21 states have (on average 130.0) internal successors, (2730), 21 states have internal predecessors, (2730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:40:27,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:40:27,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 359 [2023-08-26 11:40:27,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:40:29,162 INFO L124 PetriNetUnfolderBase]: 3336/5481 cut-off events. [2023-08-26 11:40:29,162 INFO L125 PetriNetUnfolderBase]: For 3080/3080 co-relation queries the response was YES. [2023-08-26 11:40:29,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14085 conditions, 5481 events. 3336/5481 cut-off events. For 3080/3080 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 27123 event pairs, 821 based on Foata normal form. 78/4999 useless extension candidates. Maximal degree in co-relation 14074. Up to 3263 conditions per place. [2023-08-26 11:40:29,198 INFO L140 encePairwiseOnDemand]: 351/359 looper letters, 220 selfloop transitions, 28 changer transitions 3/252 dead transitions. [2023-08-26 11:40:29,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 252 transitions, 1346 flow [2023-08-26 11:40:29,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-26 11:40:29,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-26 11:40:29,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2009 transitions. [2023-08-26 11:40:29,203 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3997214484679666 [2023-08-26 11:40:29,203 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2009 transitions. [2023-08-26 11:40:29,203 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2009 transitions. [2023-08-26 11:40:29,204 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:40:29,204 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2009 transitions. [2023-08-26 11:40:29,208 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 143.5) internal successors, (2009), 14 states have internal predecessors, (2009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:40:29,214 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 359.0) internal successors, (5385), 15 states have internal predecessors, (5385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:40:29,215 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 359.0) internal successors, (5385), 15 states have internal predecessors, (5385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:40:29,216 INFO L175 Difference]: Start difference. First operand has 62 places, 66 transitions, 301 flow. Second operand 14 states and 2009 transitions. [2023-08-26 11:40:29,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 252 transitions, 1346 flow [2023-08-26 11:40:29,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 252 transitions, 1332 flow, removed 7 selfloop flow, removed 0 redundant places. [2023-08-26 11:40:29,228 INFO L231 Difference]: Finished difference. Result has 82 places, 90 transitions, 547 flow [2023-08-26 11:40:29,228 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=293, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=547, PETRI_PLACES=82, PETRI_TRANSITIONS=90} [2023-08-26 11:40:29,228 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 35 predicate places. [2023-08-26 11:40:29,229 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 90 transitions, 547 flow [2023-08-26 11:40:29,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 130.0) internal successors, (2730), 21 states have internal predecessors, (2730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:40:29,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:40:29,230 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:40:29,240 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-26 11:40:29,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-08-26 11:40:29,436 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 11:40:29,436 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:40:29,437 INFO L85 PathProgramCache]: Analyzing trace with hash -1931755668, now seen corresponding path program 1 times [2023-08-26 11:40:29,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:40:29,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320183301] [2023-08-26 11:40:29,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:40:29,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:40:29,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:40:29,510 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 11:40:29,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:40:29,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320183301] [2023-08-26 11:40:29,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320183301] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:40:29,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:40:29,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 11:40:29,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645236928] [2023-08-26 11:40:29,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:40:29,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:40:29,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:40:29,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:40:29,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:40:29,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 359 [2023-08-26 11:40:29,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 90 transitions, 547 flow. Second operand has 3 states, 3 states have (on average 160.0) internal successors, (480), 3 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:40:29,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:40:29,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 359 [2023-08-26 11:40:29,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:40:29,721 INFO L124 PetriNetUnfolderBase]: 828/1599 cut-off events. [2023-08-26 11:40:29,721 INFO L125 PetriNetUnfolderBase]: For 1154/1154 co-relation queries the response was YES. [2023-08-26 11:40:29,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4210 conditions, 1599 events. 828/1599 cut-off events. For 1154/1154 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 6919 event pairs, 130 based on Foata normal form. 78/1597 useless extension candidates. Maximal degree in co-relation 4191. Up to 1166 conditions per place. [2023-08-26 11:40:29,729 INFO L140 encePairwiseOnDemand]: 354/359 looper letters, 59 selfloop transitions, 8 changer transitions 0/73 dead transitions. [2023-08-26 11:40:29,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 73 transitions, 524 flow [2023-08-26 11:40:29,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:40:29,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:40:29,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 507 transitions. [2023-08-26 11:40:29,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47075208913649025 [2023-08-26 11:40:29,731 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 507 transitions. [2023-08-26 11:40:29,731 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 507 transitions. [2023-08-26 11:40:29,731 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:40:29,731 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 507 transitions. [2023-08-26 11:40:29,732 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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 11:40:29,734 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 359.0) internal successors, (1436), 4 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:40:29,734 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 359.0) internal successors, (1436), 4 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:40:29,735 INFO L175 Difference]: Start difference. First operand has 82 places, 90 transitions, 547 flow. Second operand 3 states and 507 transitions. [2023-08-26 11:40:29,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 73 transitions, 524 flow [2023-08-26 11:40:29,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 73 transitions, 504 flow, removed 6 selfloop flow, removed 4 redundant places. [2023-08-26 11:40:29,741 INFO L231 Difference]: Finished difference. Result has 75 places, 64 transitions, 365 flow [2023-08-26 11:40:29,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=349, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=365, PETRI_PLACES=75, PETRI_TRANSITIONS=64} [2023-08-26 11:40:29,741 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 28 predicate places. [2023-08-26 11:40:29,742 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 64 transitions, 365 flow [2023-08-26 11:40:29,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 160.0) internal successors, (480), 3 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:40:29,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:40:29,742 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:40:29,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-26 11:40:29,742 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 11:40:29,743 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:40:29,743 INFO L85 PathProgramCache]: Analyzing trace with hash -53001699, now seen corresponding path program 1 times [2023-08-26 11:40:29,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:40:29,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13843019] [2023-08-26 11:40:29,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:40:29,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:40:29,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:40:29,827 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 11:40:29,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:40:29,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13843019] [2023-08-26 11:40:29,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13843019] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:40:29,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:40:29,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-26 11:40:29,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625794050] [2023-08-26 11:40:29,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:40:29,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 11:40:29,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:40:29,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 11:40:29,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-08-26 11:40:29,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 359 [2023-08-26 11:40:29,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 64 transitions, 365 flow. Second operand has 7 states, 7 states have (on average 136.71428571428572) internal successors, (957), 7 states have internal predecessors, (957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:40:29,831 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:40:29,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 359 [2023-08-26 11:40:29,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:40:30,148 INFO L124 PetriNetUnfolderBase]: 890/1711 cut-off events. [2023-08-26 11:40:30,148 INFO L125 PetriNetUnfolderBase]: For 945/945 co-relation queries the response was YES. [2023-08-26 11:40:30,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4675 conditions, 1711 events. 890/1711 cut-off events. For 945/945 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 7540 event pairs, 119 based on Foata normal form. 0/1705 useless extension candidates. Maximal degree in co-relation 4656. Up to 774 conditions per place. [2023-08-26 11:40:30,158 INFO L140 encePairwiseOnDemand]: 351/359 looper letters, 74 selfloop transitions, 22 changer transitions 3/105 dead transitions. [2023-08-26 11:40:30,158 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 105 transitions, 715 flow [2023-08-26 11:40:30,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-26 11:40:30,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-26 11:40:30,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1146 transitions. [2023-08-26 11:40:30,161 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39902506963788303 [2023-08-26 11:40:30,161 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1146 transitions. [2023-08-26 11:40:30,161 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1146 transitions. [2023-08-26 11:40:30,162 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:40:30,162 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1146 transitions. [2023-08-26 11:40:30,164 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 143.25) internal successors, (1146), 8 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:40:30,168 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 359.0) internal successors, (3231), 9 states have internal predecessors, (3231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:40:30,169 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 359.0) internal successors, (3231), 9 states have internal predecessors, (3231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:40:30,169 INFO L175 Difference]: Start difference. First operand has 75 places, 64 transitions, 365 flow. Second operand 8 states and 1146 transitions. [2023-08-26 11:40:30,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 105 transitions, 715 flow [2023-08-26 11:40:30,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 105 transitions, 700 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 11:40:30,174 INFO L231 Difference]: Finished difference. Result has 80 places, 69 transitions, 440 flow [2023-08-26 11:40:30,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=355, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=440, PETRI_PLACES=80, PETRI_TRANSITIONS=69} [2023-08-26 11:40:30,175 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 33 predicate places. [2023-08-26 11:40:30,175 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 69 transitions, 440 flow [2023-08-26 11:40:30,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 136.71428571428572) internal successors, (957), 7 states have internal predecessors, (957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:40:30,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:40:30,176 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:40:30,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-26 11:40:30,176 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 11:40:30,176 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:40:30,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1191467868, now seen corresponding path program 1 times [2023-08-26 11:40:30,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:40:30,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359883110] [2023-08-26 11:40:30,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:40:30,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:40:30,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:40:30,473 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 11:40:30,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:40:30,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359883110] [2023-08-26 11:40:30,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359883110] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:40:30,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:40:30,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-08-26 11:40:30,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359482006] [2023-08-26 11:40:30,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:40:30,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-26 11:40:30,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:40:30,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-26 11:40:30,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2023-08-26 11:40:30,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 359 [2023-08-26 11:40:30,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 69 transitions, 440 flow. Second operand has 13 states, 13 states have (on average 122.53846153846153) internal successors, (1593), 13 states have internal predecessors, (1593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:40:30,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:40:30,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 359 [2023-08-26 11:40:30,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:40:31,194 INFO L124 PetriNetUnfolderBase]: 1094/2041 cut-off events. [2023-08-26 11:40:31,194 INFO L125 PetriNetUnfolderBase]: For 1115/1115 co-relation queries the response was YES. [2023-08-26 11:40:31,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5743 conditions, 2041 events. 1094/2041 cut-off events. For 1115/1115 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 9308 event pairs, 221 based on Foata normal form. 0/2011 useless extension candidates. Maximal degree in co-relation 5723. Up to 1352 conditions per place. [2023-08-26 11:40:31,204 INFO L140 encePairwiseOnDemand]: 347/359 looper letters, 148 selfloop transitions, 16 changer transitions 3/168 dead transitions. [2023-08-26 11:40:31,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 168 transitions, 1102 flow [2023-08-26 11:40:31,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-26 11:40:31,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-26 11:40:31,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1717 transitions. [2023-08-26 11:40:31,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36790229269337904 [2023-08-26 11:40:31,210 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1717 transitions. [2023-08-26 11:40:31,210 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1717 transitions. [2023-08-26 11:40:31,211 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:40:31,211 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1717 transitions. [2023-08-26 11:40:31,214 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 132.07692307692307) internal successors, (1717), 13 states have internal predecessors, (1717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:40:31,220 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 359.0) internal successors, (5026), 14 states have internal predecessors, (5026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:40:31,220 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 359.0) internal successors, (5026), 14 states have internal predecessors, (5026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:40:31,221 INFO L175 Difference]: Start difference. First operand has 80 places, 69 transitions, 440 flow. Second operand 13 states and 1717 transitions. [2023-08-26 11:40:31,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 168 transitions, 1102 flow [2023-08-26 11:40:31,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 168 transitions, 1037 flow, removed 6 selfloop flow, removed 5 redundant places. [2023-08-26 11:40:31,229 INFO L231 Difference]: Finished difference. Result has 92 places, 78 transitions, 507 flow [2023-08-26 11:40:31,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=399, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=507, PETRI_PLACES=92, PETRI_TRANSITIONS=78} [2023-08-26 11:40:31,230 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 45 predicate places. [2023-08-26 11:40:31,230 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 78 transitions, 507 flow [2023-08-26 11:40:31,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 122.53846153846153) internal successors, (1593), 13 states have internal predecessors, (1593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:40:31,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:40:31,230 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:40:31,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-26 11:40:31,231 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t2Err2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 11:40:31,232 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:40:31,232 INFO L85 PathProgramCache]: Analyzing trace with hash 1755615081, now seen corresponding path program 1 times [2023-08-26 11:40:31,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:40:31,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039258411] [2023-08-26 11:40:31,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:40:31,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:40:31,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:40:31,798 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 11:40:31,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:40:31,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039258411] [2023-08-26 11:40:31,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039258411] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:40:31,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:40:31,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-08-26 11:40:31,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628909010] [2023-08-26 11:40:31,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:40:31,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-26 11:40:31,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:40:31,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-26 11:40:31,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2023-08-26 11:40:31,801 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 359 [2023-08-26 11:40:31,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 78 transitions, 507 flow. Second operand has 15 states, 15 states have (on average 115.46666666666667) internal successors, (1732), 15 states have internal predecessors, (1732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:40:31,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:40:31,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 359 [2023-08-26 11:40:31,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:40:32,878 INFO L124 PetriNetUnfolderBase]: 1332/2486 cut-off events. [2023-08-26 11:40:32,878 INFO L125 PetriNetUnfolderBase]: For 1622/1622 co-relation queries the response was YES. [2023-08-26 11:40:32,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7114 conditions, 2486 events. 1332/2486 cut-off events. For 1622/1622 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 12026 event pairs, 343 based on Foata normal form. 0/2462 useless extension candidates. Maximal degree in co-relation 7089. Up to 1843 conditions per place. [2023-08-26 11:40:32,890 INFO L140 encePairwiseOnDemand]: 343/359 looper letters, 150 selfloop transitions, 28 changer transitions 4/183 dead transitions. [2023-08-26 11:40:32,891 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 183 transitions, 1240 flow [2023-08-26 11:40:32,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-26 11:40:32,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-26 11:40:32,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2195 transitions. [2023-08-26 11:40:32,903 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33967811822965027 [2023-08-26 11:40:32,903 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2195 transitions. [2023-08-26 11:40:32,906 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2195 transitions. [2023-08-26 11:40:32,909 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:40:32,909 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2195 transitions. [2023-08-26 11:40:32,915 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 121.94444444444444) internal successors, (2195), 18 states have internal predecessors, (2195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:40:32,925 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 359.0) internal successors, (6821), 19 states have internal predecessors, (6821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:40:32,926 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 359.0) internal successors, (6821), 19 states have internal predecessors, (6821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:40:32,926 INFO L175 Difference]: Start difference. First operand has 92 places, 78 transitions, 507 flow. Second operand 18 states and 2195 transitions. [2023-08-26 11:40:32,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 183 transitions, 1240 flow [2023-08-26 11:40:32,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 183 transitions, 1213 flow, removed 6 selfloop flow, removed 4 redundant places. [2023-08-26 11:40:32,936 INFO L231 Difference]: Finished difference. Result has 113 places, 102 transitions, 712 flow [2023-08-26 11:40:32,936 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=491, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=712, PETRI_PLACES=113, PETRI_TRANSITIONS=102} [2023-08-26 11:40:32,936 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 66 predicate places. [2023-08-26 11:40:32,936 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 102 transitions, 712 flow [2023-08-26 11:40:32,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 115.46666666666667) internal successors, (1732), 15 states have internal predecessors, (1732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:40:32,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:40:32,937 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:40:32,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-26 11:40:32,937 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t2Err2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 11:40:32,938 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:40:32,938 INFO L85 PathProgramCache]: Analyzing trace with hash 1601125847, now seen corresponding path program 2 times [2023-08-26 11:40:32,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:40:32,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065994982] [2023-08-26 11:40:32,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:40:32,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:40:32,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:40:33,745 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 11:40:33,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:40:33,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065994982] [2023-08-26 11:40:33,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065994982] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:40:33,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:40:33,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-08-26 11:40:33,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467765311] [2023-08-26 11:40:33,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:40:33,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-26 11:40:33,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:40:33,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-26 11:40:33,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2023-08-26 11:40:33,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 359 [2023-08-26 11:40:33,750 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 102 transitions, 712 flow. Second operand has 16 states, 16 states have (on average 107.375) internal successors, (1718), 16 states have internal predecessors, (1718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:40:33,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:40:33,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 359 [2023-08-26 11:40:33,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:40:35,102 INFO L124 PetriNetUnfolderBase]: 1554/2901 cut-off events. [2023-08-26 11:40:35,102 INFO L125 PetriNetUnfolderBase]: For 2138/2138 co-relation queries the response was YES. [2023-08-26 11:40:35,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8671 conditions, 2901 events. 1554/2901 cut-off events. For 2138/2138 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 14732 event pairs, 435 based on Foata normal form. 0/2877 useless extension candidates. Maximal degree in co-relation 8637. Up to 1863 conditions per place. [2023-08-26 11:40:35,118 INFO L140 encePairwiseOnDemand]: 343/359 looper letters, 150 selfloop transitions, 34 changer transitions 3/188 dead transitions. [2023-08-26 11:40:35,118 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 188 transitions, 1395 flow [2023-08-26 11:40:35,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-26 11:40:35,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-26 11:40:35,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1615 transitions. [2023-08-26 11:40:35,123 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3213290887385595 [2023-08-26 11:40:35,123 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1615 transitions. [2023-08-26 11:40:35,123 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1615 transitions. [2023-08-26 11:40:35,124 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:40:35,124 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1615 transitions. [2023-08-26 11:40:35,127 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 115.35714285714286) internal successors, (1615), 14 states have internal predecessors, (1615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:40:35,133 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 359.0) internal successors, (5385), 15 states have internal predecessors, (5385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:40:35,134 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 359.0) internal successors, (5385), 15 states have internal predecessors, (5385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:40:35,134 INFO L175 Difference]: Start difference. First operand has 113 places, 102 transitions, 712 flow. Second operand 14 states and 1615 transitions. [2023-08-26 11:40:35,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 188 transitions, 1395 flow [2023-08-26 11:40:35,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 188 transitions, 1384 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-26 11:40:35,147 INFO L231 Difference]: Finished difference. Result has 130 places, 113 transitions, 908 flow [2023-08-26 11:40:35,147 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=701, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=908, PETRI_PLACES=130, PETRI_TRANSITIONS=113} [2023-08-26 11:40:35,147 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 83 predicate places. [2023-08-26 11:40:35,147 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 113 transitions, 908 flow [2023-08-26 11:40:35,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 107.375) internal successors, (1718), 16 states have internal predecessors, (1718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:40:35,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:40:35,148 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:40:35,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-26 11:40:35,148 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting t2Err2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 11:40:35,148 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:40:35,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1902234905, now seen corresponding path program 3 times [2023-08-26 11:40:35,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:40:35,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400800440] [2023-08-26 11:40:35,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:40:35,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:40:35,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:40:35,773 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 11:40:35,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:40:35,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400800440] [2023-08-26 11:40:35,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400800440] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:40:35,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:40:35,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-08-26 11:40:35,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582316601] [2023-08-26 11:40:35,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:40:35,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-26 11:40:35,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:40:35,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-26 11:40:35,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2023-08-26 11:40:35,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 359 [2023-08-26 11:40:35,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 113 transitions, 908 flow. Second operand has 16 states, 16 states have (on average 107.375) internal successors, (1718), 16 states have internal predecessors, (1718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:40:35,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:40:35,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 359 [2023-08-26 11:40:35,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:40:37,113 INFO L124 PetriNetUnfolderBase]: 1548/2891 cut-off events. [2023-08-26 11:40:37,113 INFO L125 PetriNetUnfolderBase]: For 2836/2836 co-relation queries the response was YES. [2023-08-26 11:40:37,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9134 conditions, 2891 events. 1548/2891 cut-off events. For 2836/2836 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 14607 event pairs, 379 based on Foata normal form. 0/2873 useless extension candidates. Maximal degree in co-relation 9092. Up to 1472 conditions per place. [2023-08-26 11:40:37,131 INFO L140 encePairwiseOnDemand]: 344/359 looper letters, 141 selfloop transitions, 44 changer transitions 3/189 dead transitions. [2023-08-26 11:40:37,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 189 transitions, 1517 flow [2023-08-26 11:40:37,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-26 11:40:37,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-26 11:40:37,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1615 transitions. [2023-08-26 11:40:37,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3213290887385595 [2023-08-26 11:40:37,136 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1615 transitions. [2023-08-26 11:40:37,136 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1615 transitions. [2023-08-26 11:40:37,137 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:40:37,137 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1615 transitions. [2023-08-26 11:40:37,140 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 115.35714285714286) internal successors, (1615), 14 states have internal predecessors, (1615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:40:37,147 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 359.0) internal successors, (5385), 15 states have internal predecessors, (5385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:40:37,148 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 359.0) internal successors, (5385), 15 states have internal predecessors, (5385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:40:37,148 INFO L175 Difference]: Start difference. First operand has 130 places, 113 transitions, 908 flow. Second operand 14 states and 1615 transitions. [2023-08-26 11:40:37,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 189 transitions, 1517 flow [2023-08-26 11:40:37,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 189 transitions, 1472 flow, removed 13 selfloop flow, removed 5 redundant places. [2023-08-26 11:40:37,166 INFO L231 Difference]: Finished difference. Result has 141 places, 118 transitions, 1022 flow [2023-08-26 11:40:37,166 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=869, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1022, PETRI_PLACES=141, PETRI_TRANSITIONS=118} [2023-08-26 11:40:37,167 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 94 predicate places. [2023-08-26 11:40:37,167 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 118 transitions, 1022 flow [2023-08-26 11:40:37,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 107.375) internal successors, (1718), 16 states have internal predecessors, (1718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:40:37,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:40:37,168 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:40:37,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-26 11:40:37,168 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting t1Err2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 11:40:37,168 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:40:37,168 INFO L85 PathProgramCache]: Analyzing trace with hash 1713677212, now seen corresponding path program 1 times [2023-08-26 11:40:37,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:40:37,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388849637] [2023-08-26 11:40:37,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:40:37,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:40:37,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:40:37,262 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:40:37,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:40:37,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388849637] [2023-08-26 11:40:37,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388849637] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 11:40:37,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421658335] [2023-08-26 11:40:37,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:40:37,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 11:40:37,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 11:40:37,264 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 11:40:37,313 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 11:40:37,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:40:37,416 INFO L262 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-26 11:40:37,418 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 11:40:37,449 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-26 11:40:37,449 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-26 11:40:37,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421658335] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:40:37,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-26 11:40:37,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2023-08-26 11:40:37,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059174551] [2023-08-26 11:40:37,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:40:37,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 11:40:37,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:40:37,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 11:40:37,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-08-26 11:40:37,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 359 [2023-08-26 11:40:37,453 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 118 transitions, 1022 flow. Second operand has 6 states, 6 states have (on average 155.0) internal successors, (930), 6 states have internal predecessors, (930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:40:37,453 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:40:37,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 359 [2023-08-26 11:40:37,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:40:37,905 INFO L124 PetriNetUnfolderBase]: 1538/2885 cut-off events. [2023-08-26 11:40:37,906 INFO L125 PetriNetUnfolderBase]: For 3427/3427 co-relation queries the response was YES. [2023-08-26 11:40:37,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9291 conditions, 2885 events. 1538/2885 cut-off events. For 3427/3427 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 14448 event pairs, 634 based on Foata normal form. 20/2881 useless extension candidates. Maximal degree in co-relation 9245. Up to 998 conditions per place. [2023-08-26 11:40:37,929 INFO L140 encePairwiseOnDemand]: 352/359 looper letters, 143 selfloop transitions, 31 changer transitions 0/175 dead transitions. [2023-08-26 11:40:37,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 175 transitions, 1571 flow [2023-08-26 11:40:37,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 11:40:37,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 11:40:37,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1157 transitions. [2023-08-26 11:40:37,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46040588937524873 [2023-08-26 11:40:37,932 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1157 transitions. [2023-08-26 11:40:37,932 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1157 transitions. [2023-08-26 11:40:37,933 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:40:37,933 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1157 transitions. [2023-08-26 11:40:37,934 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 165.28571428571428) internal successors, (1157), 7 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:40:37,937 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 359.0) internal successors, (2872), 8 states have internal predecessors, (2872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:40:37,937 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 359.0) internal successors, (2872), 8 states have internal predecessors, (2872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:40:37,937 INFO L175 Difference]: Start difference. First operand has 141 places, 118 transitions, 1022 flow. Second operand 7 states and 1157 transitions. [2023-08-26 11:40:37,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 175 transitions, 1571 flow [2023-08-26 11:40:37,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 175 transitions, 1506 flow, removed 11 selfloop flow, removed 9 redundant places. [2023-08-26 11:40:37,958 INFO L231 Difference]: Finished difference. Result has 139 places, 122 transitions, 1071 flow [2023-08-26 11:40:37,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=908, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1071, PETRI_PLACES=139, PETRI_TRANSITIONS=122} [2023-08-26 11:40:37,958 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 92 predicate places. [2023-08-26 11:40:37,958 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 122 transitions, 1071 flow [2023-08-26 11:40:37,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 155.0) internal successors, (930), 6 states have internal predecessors, (930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:40:37,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:40:37,959 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:40:37,965 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-26 11:40:38,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-26 11:40:38,165 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 11:40:38,166 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:40:38,166 INFO L85 PathProgramCache]: Analyzing trace with hash -1402451062, now seen corresponding path program 1 times [2023-08-26 11:40:38,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:40:38,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738646737] [2023-08-26 11:40:38,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:40:38,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:40:38,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:40:38,479 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:40:38,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:40:38,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738646737] [2023-08-26 11:40:38,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738646737] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 11:40:38,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239672106] [2023-08-26 11:40:38,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:40:38,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 11:40:38,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 11:40:38,485 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 11:40:38,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-26 11:40:38,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:40:38,598 INFO L262 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 33 conjunts are in the unsatisfiable core [2023-08-26 11:40:38,600 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 11:40:38,956 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:40:38,956 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 11:40:39,172 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-26 11:40:39,173 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 33 [2023-08-26 11:40:39,334 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:40:39,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239672106] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 11:40:39,335 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 11:40:39,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 31 [2023-08-26 11:40:39,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656078834] [2023-08-26 11:40:39,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 11:40:39,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-26 11:40:39,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:40:39,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-26 11:40:39,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=952, Unknown=0, NotChecked=0, Total=1056 [2023-08-26 11:40:39,339 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 359 [2023-08-26 11:40:39,342 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 122 transitions, 1071 flow. Second operand has 33 states, 33 states have (on average 120.27272727272727) internal successors, (3969), 33 states have internal predecessors, (3969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:40:39,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:40:39,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 359 [2023-08-26 11:40:39,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:40:42,937 INFO L124 PetriNetUnfolderBase]: 2334/4397 cut-off events. [2023-08-26 11:40:42,937 INFO L125 PetriNetUnfolderBase]: For 5023/5023 co-relation queries the response was YES. [2023-08-26 11:40:42,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13827 conditions, 4397 events. 2334/4397 cut-off events. For 5023/5023 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 23119 event pairs, 281 based on Foata normal form. 82/4431 useless extension candidates. Maximal degree in co-relation 13778. Up to 1075 conditions per place. [2023-08-26 11:40:42,961 INFO L140 encePairwiseOnDemand]: 342/359 looper letters, 255 selfloop transitions, 116 changer transitions 3/375 dead transitions. [2023-08-26 11:40:42,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 375 transitions, 2869 flow [2023-08-26 11:40:42,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-08-26 11:40:42,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-08-26 11:40:42,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 4653 transitions. [2023-08-26 11:40:42,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3502973725814951 [2023-08-26 11:40:42,968 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 4653 transitions. [2023-08-26 11:40:42,968 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 4653 transitions. [2023-08-26 11:40:42,969 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:40:42,969 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 4653 transitions. [2023-08-26 11:40:42,976 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 125.75675675675676) internal successors, (4653), 37 states have internal predecessors, (4653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:40:42,986 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 359.0) internal successors, (13642), 38 states have internal predecessors, (13642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:40:42,988 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 359.0) internal successors, (13642), 38 states have internal predecessors, (13642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:40:42,988 INFO L175 Difference]: Start difference. First operand has 139 places, 122 transitions, 1071 flow. Second operand 37 states and 4653 transitions. [2023-08-26 11:40:42,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 375 transitions, 2869 flow [2023-08-26 11:40:43,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 375 transitions, 2823 flow, removed 23 selfloop flow, removed 0 redundant places. [2023-08-26 11:40:43,017 INFO L231 Difference]: Finished difference. Result has 192 places, 188 transitions, 1968 flow [2023-08-26 11:40:43,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=1020, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=1968, PETRI_PLACES=192, PETRI_TRANSITIONS=188} [2023-08-26 11:40:43,017 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 145 predicate places. [2023-08-26 11:40:43,018 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 188 transitions, 1968 flow [2023-08-26 11:40:43,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 120.27272727272727) internal successors, (3969), 33 states have internal predecessors, (3969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:40:43,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:40:43,019 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:40:43,028 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-26 11:40:43,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 11:40:43,225 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting t2Err2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 11:40:43,225 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:40:43,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1582440959, now seen corresponding path program 1 times [2023-08-26 11:40:43,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:40:43,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119104390] [2023-08-26 11:40:43,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:40:43,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:40:43,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 11:40:43,269 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 11:40:43,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 11:40:43,327 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 11:40:43,327 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 11:40:43,328 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location t2Err2ASSERT_VIOLATIONASSERT (21 of 22 remaining) [2023-08-26 11:40:43,329 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 22 remaining) [2023-08-26 11:40:43,329 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 22 remaining) [2023-08-26 11:40:43,330 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 22 remaining) [2023-08-26 11:40:43,330 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 22 remaining) [2023-08-26 11:40:43,330 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 22 remaining) [2023-08-26 11:40:43,330 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 22 remaining) [2023-08-26 11:40:43,330 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 22 remaining) [2023-08-26 11:40:43,330 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 22 remaining) [2023-08-26 11:40:43,330 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (12 of 22 remaining) [2023-08-26 11:40:43,330 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (11 of 22 remaining) [2023-08-26 11:40:43,330 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 22 remaining) [2023-08-26 11:40:43,330 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 22 remaining) [2023-08-26 11:40:43,331 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err2ASSERT_VIOLATIONASSERT (8 of 22 remaining) [2023-08-26 11:40:43,331 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err2ASSERT_VIOLATIONASSERT (7 of 22 remaining) [2023-08-26 11:40:43,331 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 22 remaining) [2023-08-26 11:40:43,331 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 22 remaining) [2023-08-26 11:40:43,331 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 22 remaining) [2023-08-26 11:40:43,331 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 22 remaining) [2023-08-26 11:40:43,331 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err2ASSERT_VIOLATIONASSERT (2 of 22 remaining) [2023-08-26 11:40:43,331 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 22 remaining) [2023-08-26 11:40:43,331 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 22 remaining) [2023-08-26 11:40:43,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-26 11:40:43,332 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:40:43,338 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-26 11:40:43,338 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-26 11:40:43,405 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 11:40:43 BasicIcfg [2023-08-26 11:40:43,405 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-26 11:40:43,405 INFO L158 Benchmark]: Toolchain (without parser) took 26531.31ms. Allocated memory was 394.3MB in the beginning and 889.2MB in the end (delta: 494.9MB). Free memory was 368.9MB in the beginning and 619.9MB in the end (delta: -251.1MB). Peak memory consumption was 244.8MB. Max. memory is 16.0GB. [2023-08-26 11:40:43,405 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 394.3MB. Free memory is still 370.6MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 11:40:43,406 INFO L158 Benchmark]: CACSL2BoogieTranslator took 650.01ms. Allocated memory is still 394.3MB. Free memory was 368.9MB in the beginning and 339.5MB in the end (delta: 29.4MB). Peak memory consumption was 29.4MB. Max. memory is 16.0GB. [2023-08-26 11:40:43,406 INFO L158 Benchmark]: Boogie Procedure Inliner took 68.28ms. Allocated memory is still 394.3MB. Free memory was 339.5MB in the beginning and 336.9MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 11:40:43,406 INFO L158 Benchmark]: Boogie Preprocessor took 40.50ms. Allocated memory is still 394.3MB. Free memory was 336.9MB in the beginning and 334.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 11:40:43,406 INFO L158 Benchmark]: RCFGBuilder took 460.56ms. Allocated memory is still 394.3MB. Free memory was 334.8MB in the beginning and 369.9MB in the end (delta: -35.1MB). Peak memory consumption was 25.1MB. Max. memory is 16.0GB. [2023-08-26 11:40:43,406 INFO L158 Benchmark]: TraceAbstraction took 25306.44ms. Allocated memory was 394.3MB in the beginning and 889.2MB in the end (delta: 494.9MB). Free memory was 368.9MB in the beginning and 619.9MB in the end (delta: -251.0MB). Peak memory consumption was 242.8MB. Max. memory is 16.0GB. [2023-08-26 11:40:43,408 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 394.3MB. Free memory is still 370.6MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 650.01ms. Allocated memory is still 394.3MB. Free memory was 368.9MB in the beginning and 339.5MB in the end (delta: 29.4MB). Peak memory consumption was 29.4MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 68.28ms. Allocated memory is still 394.3MB. Free memory was 339.5MB in the beginning and 336.9MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 40.50ms. Allocated memory is still 394.3MB. Free memory was 336.9MB in the beginning and 334.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 460.56ms. Allocated memory is still 394.3MB. Free memory was 334.8MB in the beginning and 369.9MB in the end (delta: -35.1MB). Peak memory consumption was 25.1MB. Max. memory is 16.0GB. * TraceAbstraction took 25306.44ms. Allocated memory was 394.3MB in the beginning and 889.2MB in the end (delta: 494.9MB). Free memory was 368.9MB in the beginning and 619.9MB in the end (delta: -251.0MB). Peak memory consumption was 242.8MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResultAtLocation [Line: 261]: Unsoundness Warning unspecified type, defaulting to int C: short [261] - GenericResultAtLocation [Line: 261]: Unsoundness Warning unspecified type, defaulting to int C: short [261] - GenericResultAtLocation [Line: 753]: Unsoundness Warning unspecified type, defaulting to int C: unsigned short [753] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 4.4s, 162 PlacesBefore, 47 PlacesAfterwards, 167 TransitionsBefore, 45 TransitionsAfterwards, 9822 CoEnabledTransitionPairs, 6 FixpointIterations, 34 TrivialSequentialCompositions, 115 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 25 ConcurrentYvCompositions, 7 ChoiceCompositions, 181 TotalNumberOfCompositions, 14891 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 10713, independent: 10488, independent conditional: 0, independent unconditional: 10488, dependent: 225, dependent conditional: 0, dependent unconditional: 225, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 5628, independent: 5568, independent conditional: 0, independent unconditional: 5568, dependent: 60, dependent conditional: 0, dependent unconditional: 60, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 10713, independent: 4920, independent conditional: 0, independent unconditional: 4920, dependent: 165, dependent conditional: 0, dependent unconditional: 165, unknown: 5628, unknown conditional: 0, unknown unconditional: 5628] , Statistics on independence cache: Total cache size (in pairs): 256, Positive cache size: 236, Positive conditional cache size: 0, Positive unconditional cache size: 236, Negative cache size: 20, Negative conditional cache size: 0, Negative unconditional cache size: 20, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - CounterExampleResult [Line: 20]: assertion can be violated assertion can be violated We found a FailurePath: [L935] 0 static int top=0; [L936] 0 static unsigned int arr[(800)]; [L937] 0 pthread_mutex_t m; [L938] 0 _Bool flag=(0); [L1020] 0 pthread_t id1, id2; [L1022] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [arr={3:0}, flag=0, id1={6:0}, id2={5:0}, m={4:0}, pthread_create(&id1, ((void *)0), t1, ((void *)0))=-1, top=0] [L989] 1 int i; [L990] 1 unsigned int tmp; [L991] 1 i=0 VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=0, i=0, m={4:0}, top=0] [L1023] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [arr={3:0}, flag=0, id1={6:0}, id2={5:0}, m={4:0}, pthread_create(&id2, ((void *)0), t2, ((void *)0))=0, top=0] [L1005] 2 int i; [L1006] 2 i=0 VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=0, i=0, m={4:0}, top=0] [L991] COND TRUE 1 i<(800) [L994] 1 tmp = __VERIFIER_nondet_uint() [L995] CALL 1 assume_abort_if_not(tmp < (800)) [L23] COND FALSE 1 !(!cond) [L995] RET 1 assume_abort_if_not(tmp < (800)) [L996] CALL, EXPR 1 push(arr,tmp) [L961] COND FALSE 1 !(top==(800)) [L968] CALL, EXPR 1 get_top() [L953] 1 return top; VAL [\result=0, arr={3:0}, flag=0, m={4:0}, top=0] [L968] RET, EXPR 1 get_top() [L968] 1 stack[get_top()] = x [L969] CALL 1 inc_top() [L945] 1 top++ [L969] RET 1 inc_top() [L971] 1 return 0; [L996] RET, EXPR 1 push(arr,tmp) [L996] COND FALSE 1 !(push(arr,tmp)==(-1)) [L998] 1 flag=(1) VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=0, m={4:0}, tmp=799, top=1] [L991] 1 i++ VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=1, m={4:0}, tmp=799, top=1] [L1006] COND TRUE 2 i<(800) [L1009] COND TRUE 2 \read(flag) [L1011] CALL, EXPR 2 pop(arr) [L975] CALL, EXPR 2 get_top() [L953] 2 return top; [L975] RET, EXPR 2 get_top() [L975] COND FALSE 2 !(get_top()==0) [L982] CALL 2 dec_top() [L949] 2 top-- VAL [arr={3:0}, flag=1, m={4:0}, top=0] [L982] RET 2 dec_top() [L983] CALL, EXPR 2 get_top() [L953] 2 return top; [L983] RET, EXPR 2 get_top() [L983] EXPR 2 stack[get_top()] [L983] 2 return stack[get_top()]; [L1011] RET, EXPR 2 pop(arr) [L1011] COND FALSE 2 !(!(pop(arr)!=(-2))) [L1006] 2 i++ VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=1, m={4:0}, top=0] [L1006] COND TRUE 2 i<(800) [L1009] COND TRUE 2 \read(flag) [L1011] CALL, EXPR 2 pop(arr) [L975] CALL, EXPR 2 get_top() [L953] 2 return top; [L975] RET, EXPR 2 get_top() [L975] COND TRUE 2 get_top()==0 [L978] 2 return (-2); [L1011] RET, EXPR 2 pop(arr) [L1011] COND TRUE 2 !(pop(arr)!=(-2)) [L1012] CALL 2 error() [L941] CALL 2 reach_error() [L20] COND FALSE 2 !(0) [L20] 2 __assert_fail ("0", "stack_longest-1.c", 3, __extension__ __PRETTY_FUNCTION__) VAL [\read(__PRETTY_FUNCTION__)={3201:3202}, arr={3:0}, flag=1, m={4:0}, top=0] - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1023]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 1022]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 20]: Unable to prove that assertion always holds Unable to prove that assertion always holds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 278 locations, 22 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: 25.1s, OverallIterations: 20, TraceHistogramMax: 2, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 13.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 4.5s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2403 SdHoareTripleChecker+Valid, 5.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2403 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 4.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 79 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 10040 IncrementalHoareTripleChecker+Invalid, 10119 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 79 mSolverCounterUnsat, 0 mSDtfsCounter, 10040 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 332 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 236 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1226 ImplicationChecksByTransitivity, 4.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1968occurred in iteration=19, InterpolantAutomatonStates: 168, 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, 0.3s SatisfiabilityAnalysisTime, 5.1s InterpolantComputationTime, 355 NumberOfCodeBlocks, 355 NumberOfCodeBlocksAsserted, 24 NumberOfCheckSat, 356 ConstructedInterpolants, 0 QuantifiedInterpolants, 3840 SizeOfPredicates, 27 NumberOfNonLiveVariables, 940 ConjunctsInSsa, 83 ConjunctsInUnsatCore, 26 InterpolantComputations, 16 PerfectInterpolantSequences, 9/33 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2023-08-26 11:40:43,433 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...