/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.order.of.the.error.locations.to.be.checked PROGRAM_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.pointer.base.address.is.valid.at.dereference ASSERTandASSUME --cacsl2boogietranslator.pointer.to.allocated.memory.at.dereference ASSERTandASSUME --cacsl2boogietranslator.check.array.bounds.for.arrays.that.are.off.heap ASSERTandASSUME --cacsl2boogietranslator.check.if.freed.pointer.was.valid true --cacsl2boogietranslator.adapt.memory.model.on.pointer.casts.if.necessary true -i ../../../trunk/examples/svcomp/pthread/stack_longest-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 17:41:52,168 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 17:41:52,249 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-08-26 17:41:52,254 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 17:41:52,255 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 17:41:52,285 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 17:41:52,285 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 17:41:52,286 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 17:41:52,288 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 17:41:52,289 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 17:41:52,290 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 17:41:52,290 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 17:41:52,290 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 17:41:52,290 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 17:41:52,291 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 17:41:52,291 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 17:41:52,291 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 17:41:52,292 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 17:41:52,292 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 17:41:52,292 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 17:41:52,292 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 17:41:52,293 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 17:41:52,293 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 17:41:52,294 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 17:41:52,294 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 17:41:52,294 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 17:41:52,295 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 17:41:52,295 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 17:41:52,295 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 17:41:52,295 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 17:41:52,296 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 17:41:52,296 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 17:41:52,297 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 17:41:52,297 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 17:41:52,297 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 17:41:52,297 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 17:41:52,595 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 17:41:52,613 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 17:41:52,615 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 17:41:52,616 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 17:41:52,619 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 17:41:52,620 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/stack_longest-1.i [2023-08-26 17:41:53,767 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 17:41:54,033 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 17:41:54,033 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack_longest-1.i [2023-08-26 17:41:54,054 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/164acba8f/f7276a2144eb4013bbec6388fa68c191/FLAGf55adeeab [2023-08-26 17:41:54,065 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/164acba8f/f7276a2144eb4013bbec6388fa68c191 [2023-08-26 17:41:54,067 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 17:41:54,068 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 17:41:54,069 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 17:41:54,069 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 17:41:54,072 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 17:41:54,072 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 05:41:54" (1/1) ... [2023-08-26 17:41:54,073 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56426168 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:41:54, skipping insertion in model container [2023-08-26 17:41:54,073 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 05:41:54" (1/1) ... [2023-08-26 17:41:54,116 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 17:41:54,524 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 17:41:54,538 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 17:41:54,561 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [261] [2023-08-26 17:41:54,571 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [261] [2023-08-26 17:41:54,577 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: unsigned short [753] [2023-08-26 17:41:54,596 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 17:41:54,662 INFO L206 MainTranslator]: Completed translation [2023-08-26 17:41:54,662 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:41:54 WrapperNode [2023-08-26 17:41:54,662 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 17:41:54,663 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 17:41:54,663 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 17:41:54,663 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 17:41:54,668 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:41:54" (1/1) ... [2023-08-26 17:41:54,683 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:41:54" (1/1) ... [2023-08-26 17:41:54,706 INFO L138 Inliner]: procedures = 277, calls = 40, calls flagged for inlining = 13, calls inlined = 14, statements flattened = 162 [2023-08-26 17:41:54,706 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 17:41:54,707 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 17:41:54,707 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 17:41:54,707 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 17:41:54,715 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:41:54" (1/1) ... [2023-08-26 17:41:54,715 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:41:54" (1/1) ... [2023-08-26 17:41:54,719 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:41:54" (1/1) ... [2023-08-26 17:41:54,720 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:41:54" (1/1) ... [2023-08-26 17:41:54,733 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:41:54" (1/1) ... [2023-08-26 17:41:54,736 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:41:54" (1/1) ... [2023-08-26 17:41:54,738 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:41:54" (1/1) ... [2023-08-26 17:41:54,739 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:41:54" (1/1) ... [2023-08-26 17:41:54,742 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 17:41:54,743 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 17:41:54,743 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 17:41:54,743 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 17:41:54,743 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:41:54" (1/1) ... [2023-08-26 17:41:54,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 17:41:54,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 17:41:54,778 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-26 17:41:54,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-26 17:41:54,817 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-08-26 17:41:54,818 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-08-26 17:41:54,818 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-08-26 17:41:54,818 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-08-26 17:41:54,818 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 17:41:54,818 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 17:41:54,818 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-26 17:41:54,819 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 17:41:54,819 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-26 17:41:54,819 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 17:41:54,819 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 17:41:54,819 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 17:41:54,819 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 17:41:54,821 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-26 17:41:54,941 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 17:41:54,943 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 17:41:55,160 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 17:41:55,168 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 17:41:55,169 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-26 17:41:55,170 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 05:41:55 BoogieIcfgContainer [2023-08-26 17:41:55,171 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 17:41:55,172 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 17:41:55,173 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 17:41:55,175 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 17:41:55,176 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 05:41:54" (1/3) ... [2023-08-26 17:41:55,176 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5eb96d10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 05:41:55, skipping insertion in model container [2023-08-26 17:41:55,176 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:41:54" (2/3) ... [2023-08-26 17:41:55,177 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5eb96d10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 05:41:55, skipping insertion in model container [2023-08-26 17:41:55,177 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 05:41:55" (3/3) ... [2023-08-26 17:41:55,178 INFO L112 eAbstractionObserver]: Analyzing ICFG stack_longest-1.i [2023-08-26 17:41:55,192 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 17:41:55,192 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 14 error locations. [2023-08-26 17:41:55,192 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 17:41:55,299 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-26 17:41:55,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 173 places, 178 transitions, 372 flow [2023-08-26 17:41:55,439 INFO L124 PetriNetUnfolderBase]: 12/176 cut-off events. [2023-08-26 17:41:55,439 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 17:41:55,452 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 17:41:55,452 INFO L82 GeneralOperation]: Start removeDead. Operand has 173 places, 178 transitions, 372 flow [2023-08-26 17:41:55,459 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 162 places, 167 transitions, 343 flow [2023-08-26 17:41:55,462 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 17:41:55,470 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 162 places, 167 transitions, 343 flow [2023-08-26 17:41:55,472 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 162 places, 167 transitions, 343 flow [2023-08-26 17:41:55,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 162 places, 167 transitions, 343 flow [2023-08-26 17:41:55,517 INFO L124 PetriNetUnfolderBase]: 12/167 cut-off events. [2023-08-26 17:41:55,518 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 17:41:55,520 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 17:41:55,525 INFO L119 LiptonReduction]: Number of co-enabled transitions 9822 [2023-08-26 17:41:59,839 INFO L134 LiptonReduction]: Checked pairs total: 14891 [2023-08-26 17:41:59,839 INFO L136 LiptonReduction]: Total number of compositions: 181 [2023-08-26 17:41:59,852 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 17:41:59,857 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;@43162656, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 17:41:59,858 INFO L358 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2023-08-26 17:41:59,859 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 17:41:59,860 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2023-08-26 17:41:59,860 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 17:41:59,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:41:59,860 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-26 17:41:59,861 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 17:41:59,865 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:41:59,865 INFO L85 PathProgramCache]: Analyzing trace with hash 747, now seen corresponding path program 1 times [2023-08-26 17:41:59,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:41:59,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335090215] [2023-08-26 17:41:59,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:41:59,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:41:59,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:41:59,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:41:59,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:41:59,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335090215] [2023-08-26 17:41:59,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335090215] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:41:59,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:41:59,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-26 17:41:59,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646886453] [2023-08-26 17:41:59,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:41:59,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 17:41:59,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:42:00,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 17:42:00,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 17:42:00,023 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 359 [2023-08-26 17:42:00,028 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 17:42:00,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:42:00,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 359 [2023-08-26 17:42:00,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:42:00,289 INFO L124 PetriNetUnfolderBase]: 1353/2126 cut-off events. [2023-08-26 17:42:00,290 INFO L125 PetriNetUnfolderBase]: For 46/46 co-relation queries the response was YES. [2023-08-26 17:42:00,293 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 17:42:00,304 INFO L140 encePairwiseOnDemand]: 357/359 looper letters, 41 selfloop transitions, 0 changer transitions 0/43 dead transitions. [2023-08-26 17:42:00,304 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 43 transitions, 177 flow [2023-08-26 17:42:00,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 17:42:00,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 17:42:00,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 373 transitions. [2023-08-26 17:42:00,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5194986072423399 [2023-08-26 17:42:00,317 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 373 transitions. [2023-08-26 17:42:00,318 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 373 transitions. [2023-08-26 17:42:00,319 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:42:00,321 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 373 transitions. [2023-08-26 17:42:00,324 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 17:42:00,328 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 17:42:00,329 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 17:42:00,331 INFO L175 Difference]: Start difference. First operand has 47 places, 45 transitions, 99 flow. Second operand 2 states and 373 transitions. [2023-08-26 17:42:00,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 43 transitions, 177 flow [2023-08-26 17:42:00,334 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 17:42:00,335 INFO L231 Difference]: Finished difference. Result has 43 places, 43 transitions, 90 flow [2023-08-26 17:42:00,337 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 17:42:00,339 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, -4 predicate places. [2023-08-26 17:42:00,340 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 43 transitions, 90 flow [2023-08-26 17:42:00,340 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 17:42:00,340 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:42:00,340 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 17:42:00,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 17:42:00,341 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 17:42:00,341 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:42:00,341 INFO L85 PathProgramCache]: Analyzing trace with hash 737049, now seen corresponding path program 1 times [2023-08-26 17:42:00,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:42:00,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640996060] [2023-08-26 17:42:00,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:42:00,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:42:00,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:42:00,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:42:00,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:42:00,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640996060] [2023-08-26 17:42:00,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640996060] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:42:00,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:42:00,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 17:42:00,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779325084] [2023-08-26 17:42:00,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:42:00,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 17:42:00,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:42:00,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 17:42:00,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 17:42:00,514 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 359 [2023-08-26 17:42:00,515 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 17:42:00,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:42:00,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 359 [2023-08-26 17:42:00,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:42:00,693 INFO L124 PetriNetUnfolderBase]: 1325/2072 cut-off events. [2023-08-26 17:42:00,694 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2023-08-26 17:42:00,696 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 17:42:00,706 INFO L140 encePairwiseOnDemand]: 356/359 looper letters, 38 selfloop transitions, 1 changer transitions 0/41 dead transitions. [2023-08-26 17:42:00,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 41 transitions, 164 flow [2023-08-26 17:42:00,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 17:42:00,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 17:42:00,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 461 transitions. [2023-08-26 17:42:00,712 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42804085422469823 [2023-08-26 17:42:00,713 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 461 transitions. [2023-08-26 17:42:00,714 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 461 transitions. [2023-08-26 17:42:00,714 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:42:00,714 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 461 transitions. [2023-08-26 17:42:00,716 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 17:42:00,720 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 17:42:00,720 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 17:42:00,721 INFO L175 Difference]: Start difference. First operand has 43 places, 43 transitions, 90 flow. Second operand 3 states and 461 transitions. [2023-08-26 17:42:00,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 41 transitions, 164 flow [2023-08-26 17:42:00,722 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 17:42:00,723 INFO L231 Difference]: Finished difference. Result has 43 places, 41 transitions, 88 flow [2023-08-26 17:42:00,723 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 17:42:00,724 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, -4 predicate places. [2023-08-26 17:42:00,726 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 41 transitions, 88 flow [2023-08-26 17:42:00,727 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 17:42:00,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:42:00,727 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 17:42:00,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 17:42:00,728 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 17:42:00,730 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:42:00,730 INFO L85 PathProgramCache]: Analyzing trace with hash 737047, now seen corresponding path program 1 times [2023-08-26 17:42:00,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:42:00,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062018242] [2023-08-26 17:42:00,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:42:00,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:42:00,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:42:00,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:42:00,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:42:00,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062018242] [2023-08-26 17:42:00,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062018242] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:42:00,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:42:00,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 17:42:00,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807438016] [2023-08-26 17:42:00,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:42:00,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 17:42:00,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:42:00,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 17:42:00,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 17:42:00,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 359 [2023-08-26 17:42:00,867 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 17:42:00,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:42:00,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 359 [2023-08-26 17:42:00,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:42:01,031 INFO L124 PetriNetUnfolderBase]: 1297/2018 cut-off events. [2023-08-26 17:42:01,032 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2023-08-26 17:42:01,033 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 17:42:01,043 INFO L140 encePairwiseOnDemand]: 356/359 looper letters, 36 selfloop transitions, 1 changer transitions 0/39 dead transitions. [2023-08-26 17:42:01,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 39 transitions, 158 flow [2023-08-26 17:42:01,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 17:42:01,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 17:42:01,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 465 transitions. [2023-08-26 17:42:01,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43175487465181056 [2023-08-26 17:42:01,045 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 465 transitions. [2023-08-26 17:42:01,045 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 465 transitions. [2023-08-26 17:42:01,046 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:42:01,046 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 465 transitions. [2023-08-26 17:42:01,047 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 17:42:01,049 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 17:42:01,049 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 17:42:01,049 INFO L175 Difference]: Start difference. First operand has 43 places, 41 transitions, 88 flow. Second operand 3 states and 465 transitions. [2023-08-26 17:42:01,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 39 transitions, 158 flow [2023-08-26 17:42:01,050 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 17:42:01,051 INFO L231 Difference]: Finished difference. Result has 42 places, 39 transitions, 85 flow [2023-08-26 17:42:01,051 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 17:42:01,052 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, -5 predicate places. [2023-08-26 17:42:01,053 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 39 transitions, 85 flow [2023-08-26 17:42:01,053 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 17:42:01,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:42:01,053 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 17:42:01,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 17:42:01,053 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 17:42:01,054 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:42:01,054 INFO L85 PathProgramCache]: Analyzing trace with hash 708320309, now seen corresponding path program 1 times [2023-08-26 17:42:01,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:42:01,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356935687] [2023-08-26 17:42:01,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:42:01,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:42:01,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:42:01,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:42:01,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:42:01,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356935687] [2023-08-26 17:42:01,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356935687] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:42:01,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:42:01,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 17:42:01,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388407052] [2023-08-26 17:42:01,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:42:01,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 17:42:01,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:42:01,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 17:42:01,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 17:42:01,174 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 359 [2023-08-26 17:42:01,174 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 17:42:01,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:42:01,175 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 359 [2023-08-26 17:42:01,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:42:01,313 INFO L124 PetriNetUnfolderBase]: 948/1502 cut-off events. [2023-08-26 17:42:01,313 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2023-08-26 17:42:01,315 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 17:42:01,321 INFO L140 encePairwiseOnDemand]: 357/359 looper letters, 35 selfloop transitions, 1 changer transitions 0/38 dead transitions. [2023-08-26 17:42:01,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 38 transitions, 155 flow [2023-08-26 17:42:01,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 17:42:01,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 17:42:01,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 448 transitions. [2023-08-26 17:42:01,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4159702878365831 [2023-08-26 17:42:01,324 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 448 transitions. [2023-08-26 17:42:01,324 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 448 transitions. [2023-08-26 17:42:01,324 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:42:01,324 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 448 transitions. [2023-08-26 17:42:01,325 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 17:42:01,327 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 17:42:01,328 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 17:42:01,328 INFO L175 Difference]: Start difference. First operand has 42 places, 39 transitions, 85 flow. Second operand 3 states and 448 transitions. [2023-08-26 17:42:01,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 38 transitions, 155 flow [2023-08-26 17:42:01,329 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 17:42:01,329 INFO L231 Difference]: Finished difference. Result has 42 places, 38 transitions, 84 flow [2023-08-26 17:42:01,330 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 17:42:01,330 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, -5 predicate places. [2023-08-26 17:42:01,330 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 38 transitions, 84 flow [2023-08-26 17:42:01,331 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 17:42:01,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:42:01,331 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 17:42:01,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 17:42:01,331 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 17:42:01,332 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:42:01,332 INFO L85 PathProgramCache]: Analyzing trace with hash 708320310, now seen corresponding path program 1 times [2023-08-26 17:42:01,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:42:01,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024157821] [2023-08-26 17:42:01,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:42:01,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:42:01,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:42:01,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:42:01,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:42:01,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024157821] [2023-08-26 17:42:01,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024157821] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:42:01,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:42:01,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 17:42:01,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758583113] [2023-08-26 17:42:01,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:42:01,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 17:42:01,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:42:01,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 17:42:01,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 17:42:01,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 359 [2023-08-26 17:42:01,447 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 17:42:01,448 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:42:01,448 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 359 [2023-08-26 17:42:01,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:42:01,547 INFO L124 PetriNetUnfolderBase]: 599/986 cut-off events. [2023-08-26 17:42:01,549 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2023-08-26 17:42:01,550 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 17:42:01,553 INFO L140 encePairwiseOnDemand]: 357/359 looper letters, 34 selfloop transitions, 1 changer transitions 0/37 dead transitions. [2023-08-26 17:42:01,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 37 transitions, 152 flow [2023-08-26 17:42:01,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 17:42:01,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 17:42:01,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 462 transitions. [2023-08-26 17:42:01,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42896935933147634 [2023-08-26 17:42:01,556 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 462 transitions. [2023-08-26 17:42:01,556 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 462 transitions. [2023-08-26 17:42:01,556 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:42:01,557 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 462 transitions. [2023-08-26 17:42:01,558 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 17:42:01,559 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 17:42:01,560 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 17:42:01,560 INFO L175 Difference]: Start difference. First operand has 42 places, 38 transitions, 84 flow. Second operand 3 states and 462 transitions. [2023-08-26 17:42:01,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 37 transitions, 152 flow [2023-08-26 17:42:01,561 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 17:42:01,561 INFO L231 Difference]: Finished difference. Result has 42 places, 37 transitions, 83 flow [2023-08-26 17:42:01,562 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 17:42:01,564 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, -5 predicate places. [2023-08-26 17:42:01,564 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 37 transitions, 83 flow [2023-08-26 17:42:01,565 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 17:42:01,565 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:42:01,565 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-26 17:42:01,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 17:42:01,565 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 17:42:01,566 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:42:01,566 INFO L85 PathProgramCache]: Analyzing trace with hash 483882604, now seen corresponding path program 1 times [2023-08-26 17:42:01,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:42:01,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134913900] [2023-08-26 17:42:01,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:42:01,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:42:01,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:42:01,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:42:01,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:42:01,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134913900] [2023-08-26 17:42:01,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134913900] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:42:01,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:42:01,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 17:42:01,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8085655] [2023-08-26 17:42:01,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:42:01,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 17:42:01,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:42:01,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 17:42:01,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-26 17:42:01,767 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 359 [2023-08-26 17:42:01,768 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 17:42:01,768 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:42:01,768 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 359 [2023-08-26 17:42:01,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:42:01,969 INFO L124 PetriNetUnfolderBase]: 674/1125 cut-off events. [2023-08-26 17:42:01,969 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2023-08-26 17:42:01,970 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 17:42:01,974 INFO L140 encePairwiseOnDemand]: 354/359 looper letters, 69 selfloop transitions, 5 changer transitions 0/76 dead transitions. [2023-08-26 17:42:01,974 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 76 transitions, 314 flow [2023-08-26 17:42:01,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 17:42:01,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 17:42:01,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 760 transitions. [2023-08-26 17:42:01,977 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4233983286908078 [2023-08-26 17:42:01,977 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 760 transitions. [2023-08-26 17:42:01,977 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 760 transitions. [2023-08-26 17:42:01,977 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:42:01,977 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 760 transitions. [2023-08-26 17:42:01,979 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 17:42:01,982 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 17:42:01,983 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 17:42:01,983 INFO L175 Difference]: Start difference. First operand has 42 places, 37 transitions, 83 flow. Second operand 5 states and 760 transitions. [2023-08-26 17:42:01,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 76 transitions, 314 flow [2023-08-26 17:42:01,985 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 17:42:01,986 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 92 flow [2023-08-26 17:42:01,986 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 17:42:01,988 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, -3 predicate places. [2023-08-26 17:42:01,988 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 92 flow [2023-08-26 17:42:01,988 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 17:42:01,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:42:01,989 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-26 17:42:01,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 17:42:01,989 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 17:42:01,989 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:42:01,989 INFO L85 PathProgramCache]: Analyzing trace with hash 483882603, now seen corresponding path program 1 times [2023-08-26 17:42:01,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:42:01,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151250818] [2023-08-26 17:42:01,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:42:01,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:42:02,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:42:02,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:42:02,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:42:02,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151250818] [2023-08-26 17:42:02,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151250818] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:42:02,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:42:02,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 17:42:02,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338278823] [2023-08-26 17:42:02,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:42:02,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 17:42:02,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:42:02,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 17:42:02,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-26 17:42:02,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 359 [2023-08-26 17:42:02,263 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 17:42:02,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:42:02,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 359 [2023-08-26 17:42:02,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:42:02,556 INFO L124 PetriNetUnfolderBase]: 988/1617 cut-off events. [2023-08-26 17:42:02,557 INFO L125 PetriNetUnfolderBase]: For 73/73 co-relation queries the response was YES. [2023-08-26 17:42:02,559 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 17:42:02,565 INFO L140 encePairwiseOnDemand]: 352/359 looper letters, 81 selfloop transitions, 7 changer transitions 0/89 dead transitions. [2023-08-26 17:42:02,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 89 transitions, 383 flow [2023-08-26 17:42:02,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 17:42:02,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 17:42:02,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 739 transitions. [2023-08-26 17:42:02,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4116991643454039 [2023-08-26 17:42:02,568 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 739 transitions. [2023-08-26 17:42:02,568 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 739 transitions. [2023-08-26 17:42:02,568 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:42:02,568 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 739 transitions. [2023-08-26 17:42:02,570 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 17:42:02,572 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 17:42:02,573 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 17:42:02,573 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 92 flow. Second operand 5 states and 739 transitions. [2023-08-26 17:42:02,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 89 transitions, 383 flow [2023-08-26 17:42:02,574 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 17:42:02,575 INFO L231 Difference]: Finished difference. Result has 49 places, 43 transitions, 136 flow [2023-08-26 17:42:02,575 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 17:42:02,576 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 2 predicate places. [2023-08-26 17:42:02,576 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 43 transitions, 136 flow [2023-08-26 17:42:02,576 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 17:42:02,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:42:02,576 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:42:02,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 17:42:02,577 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 17:42:02,577 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:42:02,577 INFO L85 PathProgramCache]: Analyzing trace with hash -594726360, now seen corresponding path program 1 times [2023-08-26 17:42:02,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:42:02,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096993750] [2023-08-26 17:42:02,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:42:02,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:42:02,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:42:02,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:42:02,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:42:02,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096993750] [2023-08-26 17:42:02,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096993750] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:42:02,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:42:02,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 17:42:02,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074060347] [2023-08-26 17:42:02,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:42:02,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 17:42:02,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:42:02,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 17:42:02,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 17:42:02,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 359 [2023-08-26 17:42:02,634 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 17:42:02,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:42:02,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 359 [2023-08-26 17:42:02,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:42:02,784 INFO L124 PetriNetUnfolderBase]: 706/1179 cut-off events. [2023-08-26 17:42:02,784 INFO L125 PetriNetUnfolderBase]: For 202/202 co-relation queries the response was YES. [2023-08-26 17:42:02,786 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 17:42:02,791 INFO L140 encePairwiseOnDemand]: 356/359 looper letters, 48 selfloop transitions, 2 changer transitions 3/54 dead transitions. [2023-08-26 17:42:02,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 54 transitions, 255 flow [2023-08-26 17:42:02,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 17:42:02,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 17:42:02,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 537 transitions. [2023-08-26 17:42:02,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4986072423398329 [2023-08-26 17:42:02,793 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 537 transitions. [2023-08-26 17:42:02,793 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 537 transitions. [2023-08-26 17:42:02,793 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:42:02,793 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 537 transitions. [2023-08-26 17:42:02,794 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 17:42:02,796 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 17:42:02,797 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 17:42:02,797 INFO L175 Difference]: Start difference. First operand has 49 places, 43 transitions, 136 flow. Second operand 3 states and 537 transitions. [2023-08-26 17:42:02,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 54 transitions, 255 flow [2023-08-26 17:42:02,799 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 17:42:02,800 INFO L231 Difference]: Finished difference. Result has 49 places, 40 transitions, 120 flow [2023-08-26 17:42:02,800 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 17:42:02,800 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 2 predicate places. [2023-08-26 17:42:02,800 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 40 transitions, 120 flow [2023-08-26 17:42:02,801 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 17:42:02,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:42:02,801 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:42:02,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-26 17:42:02,801 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 17:42:02,801 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:42:02,802 INFO L85 PathProgramCache]: Analyzing trace with hash 1517459765, now seen corresponding path program 1 times [2023-08-26 17:42:02,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:42:02,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542668948] [2023-08-26 17:42:02,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:42:02,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:42:02,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:42:02,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:42:02,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:42:02,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542668948] [2023-08-26 17:42:02,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542668948] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:42:02,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:42:02,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 17:42:02,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911289866] [2023-08-26 17:42:02,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:42:02,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 17:42:02,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:42:02,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 17:42:02,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 17:42:02,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 359 [2023-08-26 17:42:02,839 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 17:42:02,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:42:02,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 359 [2023-08-26 17:42:02,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:42:02,977 INFO L124 PetriNetUnfolderBase]: 674/1127 cut-off events. [2023-08-26 17:42:02,977 INFO L125 PetriNetUnfolderBase]: For 188/188 co-relation queries the response was YES. [2023-08-26 17:42:02,979 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 17:42:02,983 INFO L140 encePairwiseOnDemand]: 356/359 looper letters, 53 selfloop transitions, 4 changer transitions 0/59 dead transitions. [2023-08-26 17:42:02,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 59 transitions, 278 flow [2023-08-26 17:42:02,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 17:42:02,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 17:42:02,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 531 transitions. [2023-08-26 17:42:02,985 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49303621169916434 [2023-08-26 17:42:02,985 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 531 transitions. [2023-08-26 17:42:02,985 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 531 transitions. [2023-08-26 17:42:02,985 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:42:02,985 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 531 transitions. [2023-08-26 17:42:02,987 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 17:42:02,988 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 17:42:02,988 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 17:42:02,989 INFO L175 Difference]: Start difference. First operand has 49 places, 40 transitions, 120 flow. Second operand 3 states and 531 transitions. [2023-08-26 17:42:02,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 59 transitions, 278 flow [2023-08-26 17:42:02,990 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 17:42:02,991 INFO L231 Difference]: Finished difference. Result has 51 places, 41 transitions, 138 flow [2023-08-26 17:42:02,991 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 17:42:02,991 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 4 predicate places. [2023-08-26 17:42:02,991 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 41 transitions, 138 flow [2023-08-26 17:42:02,992 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 17:42:02,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:42:02,992 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:42:02,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-26 17:42:02,992 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 17:42:02,993 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:42:02,993 INFO L85 PathProgramCache]: Analyzing trace with hash 1122937346, now seen corresponding path program 1 times [2023-08-26 17:42:02,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:42:02,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872479300] [2023-08-26 17:42:02,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:42:02,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:42:03,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:42:03,050 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 17:42:03,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:42:03,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872479300] [2023-08-26 17:42:03,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872479300] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 17:42:03,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751170165] [2023-08-26 17:42:03,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:42:03,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:42:03,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 17:42:03,057 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 17:42:03,078 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 17:42:03,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:42:03,161 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-26 17:42:03,165 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 17:42:03,254 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 17:42:03,254 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 17:42:03,288 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 17:42:03,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751170165] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 17:42:03,289 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 17:42:03,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2023-08-26 17:42:03,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116095714] [2023-08-26 17:42:03,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 17:42:03,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-26 17:42:03,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:42:03,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-26 17:42:03,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-08-26 17:42:03,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 359 [2023-08-26 17:42:03,293 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 17:42:03,293 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:42:03,293 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 359 [2023-08-26 17:42:03,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:42:03,875 INFO L124 PetriNetUnfolderBase]: 2180/3603 cut-off events. [2023-08-26 17:42:03,875 INFO L125 PetriNetUnfolderBase]: For 1321/1321 co-relation queries the response was YES. [2023-08-26 17:42:03,880 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 17:42:03,895 INFO L140 encePairwiseOnDemand]: 353/359 looper letters, 182 selfloop transitions, 23 changer transitions 0/206 dead transitions. [2023-08-26 17:42:03,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 206 transitions, 981 flow [2023-08-26 17:42:03,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-26 17:42:03,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-26 17:42:03,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1732 transitions. [2023-08-26 17:42:03,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48245125348189416 [2023-08-26 17:42:03,899 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1732 transitions. [2023-08-26 17:42:03,899 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1732 transitions. [2023-08-26 17:42:03,900 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:42:03,900 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1732 transitions. [2023-08-26 17:42:03,903 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 17:42:03,908 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 17:42:03,909 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 17:42:03,909 INFO L175 Difference]: Start difference. First operand has 51 places, 41 transitions, 138 flow. Second operand 10 states and 1732 transitions. [2023-08-26 17:42:03,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 206 transitions, 981 flow [2023-08-26 17:42:03,916 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 17:42:03,918 INFO L231 Difference]: Finished difference. Result has 62 places, 66 transitions, 301 flow [2023-08-26 17:42:03,918 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 17:42:03,919 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 15 predicate places. [2023-08-26 17:42:03,919 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 66 transitions, 301 flow [2023-08-26 17:42:03,920 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 17:42:03,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:42:03,920 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:42:03,928 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 17:42:04,127 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 17:42:04,128 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 17:42:04,128 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:42:04,128 INFO L85 PathProgramCache]: Analyzing trace with hash 1122935256, now seen corresponding path program 1 times [2023-08-26 17:42:04,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:42:04,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845592079] [2023-08-26 17:42:04,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:42:04,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:42:04,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:42:04,495 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 17:42:04,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:42:04,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845592079] [2023-08-26 17:42:04,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845592079] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 17:42:04,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217930030] [2023-08-26 17:42:04,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:42:04,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:42:04,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 17:42:04,497 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 17:42:04,500 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 17:42:04,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:42:04,601 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 40 conjunts are in the unsatisfiable core [2023-08-26 17:42:04,603 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 17:42:04,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 17:42:04,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 17:42:04,656 INFO L322 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-26 17:42:04,657 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 17:42:04,683 INFO L322 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2023-08-26 17:42:04,683 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 17:42:04,914 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 17:42:04,914 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 17:42:05,075 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 17:42:05,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217930030] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 17:42:05,076 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 17:42:05,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 5] total 19 [2023-08-26 17:42:05,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650552009] [2023-08-26 17:42:05,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 17:42:05,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-26 17:42:05,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:42:05,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-26 17:42:05,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2023-08-26 17:42:05,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 359 [2023-08-26 17:42:05,081 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 17:42:05,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:42:05,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 359 [2023-08-26 17:42:05,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:42:06,539 INFO L124 PetriNetUnfolderBase]: 3336/5481 cut-off events. [2023-08-26 17:42:06,539 INFO L125 PetriNetUnfolderBase]: For 3080/3080 co-relation queries the response was YES. [2023-08-26 17:42:06,547 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 17:42:06,565 INFO L140 encePairwiseOnDemand]: 351/359 looper letters, 220 selfloop transitions, 28 changer transitions 3/252 dead transitions. [2023-08-26 17:42:06,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 252 transitions, 1346 flow [2023-08-26 17:42:06,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-26 17:42:06,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-26 17:42:06,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2009 transitions. [2023-08-26 17:42:06,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3997214484679666 [2023-08-26 17:42:06,575 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2009 transitions. [2023-08-26 17:42:06,575 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2009 transitions. [2023-08-26 17:42:06,576 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:42:06,576 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2009 transitions. [2023-08-26 17:42:06,580 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 17:42:06,586 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 17:42:06,587 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 17:42:06,588 INFO L175 Difference]: Start difference. First operand has 62 places, 66 transitions, 301 flow. Second operand 14 states and 2009 transitions. [2023-08-26 17:42:06,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 252 transitions, 1346 flow [2023-08-26 17:42:06,599 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 17:42:06,602 INFO L231 Difference]: Finished difference. Result has 82 places, 90 transitions, 547 flow [2023-08-26 17:42:06,602 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 17:42:06,603 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 35 predicate places. [2023-08-26 17:42:06,603 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 90 transitions, 547 flow [2023-08-26 17:42:06,604 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 17:42:06,604 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:42:06,604 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 17:42:06,621 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 17:42:06,816 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 17:42:06,816 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 17:42:06,816 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:42:06,816 INFO L85 PathProgramCache]: Analyzing trace with hash -1931755668, now seen corresponding path program 1 times [2023-08-26 17:42:06,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:42:06,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572431406] [2023-08-26 17:42:06,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:42:06,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:42:06,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:42:06,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:42:06,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:42:06,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572431406] [2023-08-26 17:42:06,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572431406] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:42:06,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:42:06,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 17:42:06,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858481218] [2023-08-26 17:42:06,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:42:06,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 17:42:06,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:42:06,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 17:42:06,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 17:42:06,904 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 359 [2023-08-26 17:42:06,905 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 17:42:06,905 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:42:06,905 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 359 [2023-08-26 17:42:06,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:42:07,097 INFO L124 PetriNetUnfolderBase]: 828/1599 cut-off events. [2023-08-26 17:42:07,097 INFO L125 PetriNetUnfolderBase]: For 1154/1154 co-relation queries the response was YES. [2023-08-26 17:42:07,101 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 17:42:07,107 INFO L140 encePairwiseOnDemand]: 354/359 looper letters, 59 selfloop transitions, 8 changer transitions 0/73 dead transitions. [2023-08-26 17:42:07,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 73 transitions, 524 flow [2023-08-26 17:42:07,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 17:42:07,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 17:42:07,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 507 transitions. [2023-08-26 17:42:07,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47075208913649025 [2023-08-26 17:42:07,110 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 507 transitions. [2023-08-26 17:42:07,110 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 507 transitions. [2023-08-26 17:42:07,110 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:42:07,110 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 507 transitions. [2023-08-26 17:42:07,111 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 17:42:07,113 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 17:42:07,113 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 17:42:07,113 INFO L175 Difference]: Start difference. First operand has 82 places, 90 transitions, 547 flow. Second operand 3 states and 507 transitions. [2023-08-26 17:42:07,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 73 transitions, 524 flow [2023-08-26 17:42:07,120 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 17:42:07,122 INFO L231 Difference]: Finished difference. Result has 75 places, 64 transitions, 365 flow [2023-08-26 17:42:07,122 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 17:42:07,122 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 28 predicate places. [2023-08-26 17:42:07,122 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 64 transitions, 365 flow [2023-08-26 17:42:07,123 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 17:42:07,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:42:07,123 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 17:42:07,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-26 17:42:07,123 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 17:42:07,123 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:42:07,123 INFO L85 PathProgramCache]: Analyzing trace with hash -53001699, now seen corresponding path program 1 times [2023-08-26 17:42:07,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:42:07,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142223068] [2023-08-26 17:42:07,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:42:07,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:42:07,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:42:07,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:42:07,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:42:07,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142223068] [2023-08-26 17:42:07,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142223068] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:42:07,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:42:07,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-26 17:42:07,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998529409] [2023-08-26 17:42:07,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:42:07,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 17:42:07,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:42:07,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 17:42:07,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-08-26 17:42:07,227 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 359 [2023-08-26 17:42:07,227 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 17:42:07,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:42:07,228 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 359 [2023-08-26 17:42:07,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:42:07,535 INFO L124 PetriNetUnfolderBase]: 890/1711 cut-off events. [2023-08-26 17:42:07,535 INFO L125 PetriNetUnfolderBase]: For 945/945 co-relation queries the response was YES. [2023-08-26 17:42:07,539 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 17:42:07,545 INFO L140 encePairwiseOnDemand]: 351/359 looper letters, 74 selfloop transitions, 22 changer transitions 3/105 dead transitions. [2023-08-26 17:42:07,545 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 105 transitions, 715 flow [2023-08-26 17:42:07,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-26 17:42:07,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-26 17:42:07,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1146 transitions. [2023-08-26 17:42:07,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39902506963788303 [2023-08-26 17:42:07,548 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1146 transitions. [2023-08-26 17:42:07,549 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1146 transitions. [2023-08-26 17:42:07,549 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:42:07,549 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1146 transitions. [2023-08-26 17:42:07,607 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 17:42:07,610 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 17:42:07,611 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 17:42:07,611 INFO L175 Difference]: Start difference. First operand has 75 places, 64 transitions, 365 flow. Second operand 8 states and 1146 transitions. [2023-08-26 17:42:07,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 105 transitions, 715 flow [2023-08-26 17:42:07,615 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 17:42:07,617 INFO L231 Difference]: Finished difference. Result has 80 places, 69 transitions, 440 flow [2023-08-26 17:42:07,617 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 17:42:07,618 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 33 predicate places. [2023-08-26 17:42:07,618 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 69 transitions, 440 flow [2023-08-26 17:42:07,630 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 17:42:07,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:42:07,631 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 17:42:07,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-26 17:42:07,631 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 17:42:07,631 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:42:07,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1191467868, now seen corresponding path program 1 times [2023-08-26 17:42:07,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:42:07,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505602866] [2023-08-26 17:42:07,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:42:07,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:42:07,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:42:07,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:42:07,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:42:07,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505602866] [2023-08-26 17:42:07,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505602866] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:42:07,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:42:07,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-08-26 17:42:07,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99841383] [2023-08-26 17:42:07,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:42:07,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-26 17:42:07,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:42:07,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-26 17:42:07,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2023-08-26 17:42:07,953 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 359 [2023-08-26 17:42:07,955 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 17:42:07,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:42:07,955 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 359 [2023-08-26 17:42:07,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:42:08,706 INFO L124 PetriNetUnfolderBase]: 1094/2041 cut-off events. [2023-08-26 17:42:08,706 INFO L125 PetriNetUnfolderBase]: For 1115/1115 co-relation queries the response was YES. [2023-08-26 17:42:08,712 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 17:42:08,718 INFO L140 encePairwiseOnDemand]: 347/359 looper letters, 148 selfloop transitions, 16 changer transitions 3/168 dead transitions. [2023-08-26 17:42:08,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 168 transitions, 1102 flow [2023-08-26 17:42:08,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-26 17:42:08,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-26 17:42:08,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1717 transitions. [2023-08-26 17:42:08,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36790229269337904 [2023-08-26 17:42:08,723 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1717 transitions. [2023-08-26 17:42:08,723 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1717 transitions. [2023-08-26 17:42:08,724 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:42:08,724 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1717 transitions. [2023-08-26 17:42:08,727 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 17:42:08,733 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 17:42:08,734 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 17:42:08,734 INFO L175 Difference]: Start difference. First operand has 80 places, 69 transitions, 440 flow. Second operand 13 states and 1717 transitions. [2023-08-26 17:42:08,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 168 transitions, 1102 flow [2023-08-26 17:42:08,740 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 17:42:08,742 INFO L231 Difference]: Finished difference. Result has 92 places, 78 transitions, 507 flow [2023-08-26 17:42:08,742 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 17:42:08,743 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 45 predicate places. [2023-08-26 17:42:08,743 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 78 transitions, 507 flow [2023-08-26 17:42:08,743 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 17:42:08,743 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:42:08,743 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 17:42:08,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-26 17:42:08,744 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 17:42:08,745 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:42:08,745 INFO L85 PathProgramCache]: Analyzing trace with hash 1755615081, now seen corresponding path program 1 times [2023-08-26 17:42:08,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:42:08,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983243941] [2023-08-26 17:42:08,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:42:08,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:42:08,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:42:09,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:42:09,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:42:09,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983243941] [2023-08-26 17:42:09,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983243941] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:42:09,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:42:09,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-08-26 17:42:09,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213171337] [2023-08-26 17:42:09,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:42:09,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-26 17:42:09,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:42:09,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-26 17:42:09,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2023-08-26 17:42:09,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 359 [2023-08-26 17:42:09,438 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 17:42:09,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:42:09,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 359 [2023-08-26 17:42:09,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:42:10,548 INFO L124 PetriNetUnfolderBase]: 1332/2486 cut-off events. [2023-08-26 17:42:10,548 INFO L125 PetriNetUnfolderBase]: For 1622/1622 co-relation queries the response was YES. [2023-08-26 17:42:10,556 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 17:42:10,563 INFO L140 encePairwiseOnDemand]: 343/359 looper letters, 150 selfloop transitions, 28 changer transitions 4/183 dead transitions. [2023-08-26 17:42:10,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 183 transitions, 1240 flow [2023-08-26 17:42:10,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-26 17:42:10,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-26 17:42:10,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2195 transitions. [2023-08-26 17:42:10,569 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33967811822965027 [2023-08-26 17:42:10,569 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2195 transitions. [2023-08-26 17:42:10,569 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2195 transitions. [2023-08-26 17:42:10,570 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:42:10,571 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2195 transitions. [2023-08-26 17:42:10,574 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 17:42:10,581 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 17:42:10,582 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 17:42:10,582 INFO L175 Difference]: Start difference. First operand has 92 places, 78 transitions, 507 flow. Second operand 18 states and 2195 transitions. [2023-08-26 17:42:10,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 183 transitions, 1240 flow [2023-08-26 17:42:10,590 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 17:42:10,592 INFO L231 Difference]: Finished difference. Result has 113 places, 102 transitions, 712 flow [2023-08-26 17:42:10,593 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 17:42:10,593 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 66 predicate places. [2023-08-26 17:42:10,593 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 102 transitions, 712 flow [2023-08-26 17:42:10,594 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 17:42:10,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:42:10,594 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 17:42:10,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-26 17:42:10,594 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 17:42:10,594 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:42:10,594 INFO L85 PathProgramCache]: Analyzing trace with hash 1601125847, now seen corresponding path program 2 times [2023-08-26 17:42:10,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:42:10,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866399819] [2023-08-26 17:42:10,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:42:10,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:42:10,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:42:11,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:42:11,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:42:11,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866399819] [2023-08-26 17:42:11,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866399819] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:42:11,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:42:11,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-08-26 17:42:11,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596357804] [2023-08-26 17:42:11,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:42:11,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-26 17:42:11,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:42:11,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-26 17:42:11,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2023-08-26 17:42:11,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 359 [2023-08-26 17:42:11,442 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 17:42:11,442 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:42:11,442 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 359 [2023-08-26 17:42:11,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:42:12,781 INFO L124 PetriNetUnfolderBase]: 1554/2901 cut-off events. [2023-08-26 17:42:12,781 INFO L125 PetriNetUnfolderBase]: For 2138/2138 co-relation queries the response was YES. [2023-08-26 17:42:12,788 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 17:42:12,797 INFO L140 encePairwiseOnDemand]: 343/359 looper letters, 150 selfloop transitions, 34 changer transitions 3/188 dead transitions. [2023-08-26 17:42:12,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 188 transitions, 1395 flow [2023-08-26 17:42:12,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-26 17:42:12,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-26 17:42:12,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1615 transitions. [2023-08-26 17:42:12,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3213290887385595 [2023-08-26 17:42:12,803 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1615 transitions. [2023-08-26 17:42:12,803 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1615 transitions. [2023-08-26 17:42:12,803 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:42:12,803 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1615 transitions. [2023-08-26 17:42:12,806 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 17:42:12,810 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 17:42:12,811 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 17:42:12,811 INFO L175 Difference]: Start difference. First operand has 113 places, 102 transitions, 712 flow. Second operand 14 states and 1615 transitions. [2023-08-26 17:42:12,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 188 transitions, 1395 flow [2023-08-26 17:42:12,821 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 17:42:12,824 INFO L231 Difference]: Finished difference. Result has 130 places, 113 transitions, 908 flow [2023-08-26 17:42:12,824 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 17:42:12,825 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 83 predicate places. [2023-08-26 17:42:12,825 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 113 transitions, 908 flow [2023-08-26 17:42:12,825 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 17:42:12,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:42:12,825 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 17:42:12,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-26 17:42:12,826 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 17:42:12,826 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:42:12,826 INFO L85 PathProgramCache]: Analyzing trace with hash 1902234905, now seen corresponding path program 3 times [2023-08-26 17:42:12,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:42:12,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520731869] [2023-08-26 17:42:12,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:42:12,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:42:12,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:42:13,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:42:13,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:42:13,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520731869] [2023-08-26 17:42:13,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520731869] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:42:13,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:42:13,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-08-26 17:42:13,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974624306] [2023-08-26 17:42:13,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:42:13,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-26 17:42:13,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:42:13,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-26 17:42:13,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2023-08-26 17:42:13,496 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 359 [2023-08-26 17:42:13,497 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 17:42:13,497 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:42:13,497 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 359 [2023-08-26 17:42:13,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:42:14,799 INFO L124 PetriNetUnfolderBase]: 1548/2891 cut-off events. [2023-08-26 17:42:14,799 INFO L125 PetriNetUnfolderBase]: For 2836/2836 co-relation queries the response was YES. [2023-08-26 17:42:14,808 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 17:42:14,817 INFO L140 encePairwiseOnDemand]: 344/359 looper letters, 141 selfloop transitions, 44 changer transitions 3/189 dead transitions. [2023-08-26 17:42:14,817 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 189 transitions, 1517 flow [2023-08-26 17:42:14,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-26 17:42:14,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-26 17:42:14,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1615 transitions. [2023-08-26 17:42:14,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3213290887385595 [2023-08-26 17:42:14,821 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1615 transitions. [2023-08-26 17:42:14,821 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1615 transitions. [2023-08-26 17:42:14,822 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:42:14,822 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1615 transitions. [2023-08-26 17:42:14,824 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 17:42:14,830 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 17:42:14,830 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 17:42:14,830 INFO L175 Difference]: Start difference. First operand has 130 places, 113 transitions, 908 flow. Second operand 14 states and 1615 transitions. [2023-08-26 17:42:14,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 189 transitions, 1517 flow [2023-08-26 17:42:14,845 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 17:42:14,847 INFO L231 Difference]: Finished difference. Result has 141 places, 118 transitions, 1022 flow [2023-08-26 17:42:14,847 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 17:42:14,848 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 94 predicate places. [2023-08-26 17:42:14,848 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 118 transitions, 1022 flow [2023-08-26 17:42:14,848 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 17:42:14,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:42:14,849 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 17:42:14,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-26 17:42:14,849 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 17:42:14,849 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:42:14,849 INFO L85 PathProgramCache]: Analyzing trace with hash 1713677212, now seen corresponding path program 1 times [2023-08-26 17:42:14,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:42:14,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512877386] [2023-08-26 17:42:14,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:42:14,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:42:14,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:42:14,934 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 17:42:14,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:42:14,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512877386] [2023-08-26 17:42:14,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512877386] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 17:42:14,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049674995] [2023-08-26 17:42:14,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:42:14,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:42:14,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 17:42:14,936 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 17:42:14,973 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 17:42:15,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:42:15,094 INFO L262 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-26 17:42:15,096 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 17:42:15,133 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 17:42:15,133 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-26 17:42:15,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049674995] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:42:15,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-26 17:42:15,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2023-08-26 17:42:15,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321166874] [2023-08-26 17:42:15,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:42:15,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 17:42:15,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:42:15,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 17:42:15,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-08-26 17:42:15,136 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 359 [2023-08-26 17:42:15,137 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 17:42:15,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:42:15,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 359 [2023-08-26 17:42:15,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:42:15,549 INFO L124 PetriNetUnfolderBase]: 1538/2885 cut-off events. [2023-08-26 17:42:15,550 INFO L125 PetriNetUnfolderBase]: For 3427/3427 co-relation queries the response was YES. [2023-08-26 17:42:15,562 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 17:42:15,572 INFO L140 encePairwiseOnDemand]: 352/359 looper letters, 143 selfloop transitions, 31 changer transitions 0/175 dead transitions. [2023-08-26 17:42:15,572 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 175 transitions, 1571 flow [2023-08-26 17:42:15,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 17:42:15,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 17:42:15,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1157 transitions. [2023-08-26 17:42:15,575 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46040588937524873 [2023-08-26 17:42:15,575 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1157 transitions. [2023-08-26 17:42:15,575 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1157 transitions. [2023-08-26 17:42:15,625 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:42:15,625 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1157 transitions. [2023-08-26 17:42:15,627 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 17:42:15,629 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 17:42:15,630 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 17:42:15,630 INFO L175 Difference]: Start difference. First operand has 141 places, 118 transitions, 1022 flow. Second operand 7 states and 1157 transitions. [2023-08-26 17:42:15,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 175 transitions, 1571 flow [2023-08-26 17:42:15,648 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 17:42:15,652 INFO L231 Difference]: Finished difference. Result has 139 places, 122 transitions, 1071 flow [2023-08-26 17:42:15,652 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 17:42:15,652 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 92 predicate places. [2023-08-26 17:42:15,653 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 122 transitions, 1071 flow [2023-08-26 17:42:15,653 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 17:42:15,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:42:15,653 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 17:42:15,663 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 17:42:15,859 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 17:42:15,860 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 17:42:15,860 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:42:15,860 INFO L85 PathProgramCache]: Analyzing trace with hash -1402451062, now seen corresponding path program 1 times [2023-08-26 17:42:15,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:42:15,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56813660] [2023-08-26 17:42:15,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:42:15,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:42:15,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:42:16,182 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 17:42:16,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:42:16,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56813660] [2023-08-26 17:42:16,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56813660] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 17:42:16,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931151814] [2023-08-26 17:42:16,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:42:16,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:42:16,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 17:42:16,185 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 17:42:16,187 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 17:42:16,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:42:16,304 INFO L262 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 33 conjunts are in the unsatisfiable core [2023-08-26 17:42:16,306 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 17:42:16,677 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 17:42:16,678 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 17:42:16,886 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-26 17:42:16,886 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 17:42:17,054 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 17:42:17,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931151814] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 17:42:17,054 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 17:42:17,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 31 [2023-08-26 17:42:17,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008906725] [2023-08-26 17:42:17,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 17:42:17,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-26 17:42:17,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:42:17,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-26 17:42:17,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=952, Unknown=0, NotChecked=0, Total=1056 [2023-08-26 17:42:17,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 359 [2023-08-26 17:42:17,062 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 17:42:17,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:42:17,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 359 [2023-08-26 17:42:17,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:42:20,755 INFO L124 PetriNetUnfolderBase]: 2334/4397 cut-off events. [2023-08-26 17:42:20,755 INFO L125 PetriNetUnfolderBase]: For 5023/5023 co-relation queries the response was YES. [2023-08-26 17:42:20,772 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 17:42:20,789 INFO L140 encePairwiseOnDemand]: 342/359 looper letters, 255 selfloop transitions, 116 changer transitions 3/375 dead transitions. [2023-08-26 17:42:20,790 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 375 transitions, 2869 flow [2023-08-26 17:42:20,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-08-26 17:42:20,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-08-26 17:42:20,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 4653 transitions. [2023-08-26 17:42:20,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3502973725814951 [2023-08-26 17:42:20,797 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 4653 transitions. [2023-08-26 17:42:20,797 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 4653 transitions. [2023-08-26 17:42:20,798 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:42:20,799 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 4653 transitions. [2023-08-26 17:42:20,805 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 17:42:20,817 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 17:42:20,820 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 17:42:20,820 INFO L175 Difference]: Start difference. First operand has 139 places, 122 transitions, 1071 flow. Second operand 37 states and 4653 transitions. [2023-08-26 17:42:20,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 375 transitions, 2869 flow [2023-08-26 17:42:20,845 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 17:42:20,849 INFO L231 Difference]: Finished difference. Result has 192 places, 188 transitions, 1968 flow [2023-08-26 17:42:20,849 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 17:42:20,850 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 145 predicate places. [2023-08-26 17:42:20,850 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 188 transitions, 1968 flow [2023-08-26 17:42:20,851 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 17:42:20,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:42:20,851 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 17:42:20,862 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 17:42:21,057 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 17:42:21,057 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 17:42:21,057 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:42:21,057 INFO L85 PathProgramCache]: Analyzing trace with hash 1582440959, now seen corresponding path program 1 times [2023-08-26 17:42:21,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:42:21,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152291283] [2023-08-26 17:42:21,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:42:21,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:42:21,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 17:42:21,083 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 17:42:21,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 17:42:21,141 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 17:42:21,141 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 17:42:21,142 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location t2Err2ASSERT_VIOLATIONASSERT (21 of 22 remaining) [2023-08-26 17:42:21,143 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 22 remaining) [2023-08-26 17:42:21,143 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 22 remaining) [2023-08-26 17:42:21,144 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 22 remaining) [2023-08-26 17:42:21,144 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 22 remaining) [2023-08-26 17:42:21,144 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 22 remaining) [2023-08-26 17:42:21,144 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 22 remaining) [2023-08-26 17:42:21,144 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 22 remaining) [2023-08-26 17:42:21,144 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 22 remaining) [2023-08-26 17:42:21,144 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (12 of 22 remaining) [2023-08-26 17:42:21,144 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (11 of 22 remaining) [2023-08-26 17:42:21,144 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 22 remaining) [2023-08-26 17:42:21,144 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 22 remaining) [2023-08-26 17:42:21,145 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err2ASSERT_VIOLATIONASSERT (8 of 22 remaining) [2023-08-26 17:42:21,145 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err2ASSERT_VIOLATIONASSERT (7 of 22 remaining) [2023-08-26 17:42:21,145 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 22 remaining) [2023-08-26 17:42:21,145 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 22 remaining) [2023-08-26 17:42:21,145 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 22 remaining) [2023-08-26 17:42:21,145 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 22 remaining) [2023-08-26 17:42:21,145 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err2ASSERT_VIOLATIONASSERT (2 of 22 remaining) [2023-08-26 17:42:21,145 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 22 remaining) [2023-08-26 17:42:21,145 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 22 remaining) [2023-08-26 17:42:21,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-26 17:42:21,146 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 17:42:21,152 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-26 17:42:21,152 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-26 17:42:21,219 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 05:42:21 BasicIcfg [2023-08-26 17:42:21,219 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-26 17:42:21,220 INFO L158 Benchmark]: Toolchain (without parser) took 27151.71ms. Allocated memory was 371.2MB in the beginning and 671.1MB in the end (delta: 299.9MB). Free memory was 326.9MB in the beginning and 451.3MB in the end (delta: -124.4MB). Peak memory consumption was 176.5MB. Max. memory is 16.0GB. [2023-08-26 17:42:21,220 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 371.2MB. Free memory is still 348.3MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 17:42:21,220 INFO L158 Benchmark]: CACSL2BoogieTranslator took 593.62ms. Allocated memory is still 371.2MB. Free memory was 326.9MB in the beginning and 297.4MB in the end (delta: 29.5MB). Peak memory consumption was 29.4MB. Max. memory is 16.0GB. [2023-08-26 17:42:21,220 INFO L158 Benchmark]: Boogie Procedure Inliner took 43.51ms. Allocated memory is still 371.2MB. Free memory was 297.4MB in the beginning and 295.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 17:42:21,220 INFO L158 Benchmark]: Boogie Preprocessor took 34.83ms. Allocated memory is still 371.2MB. Free memory was 295.3MB in the beginning and 293.3MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 17:42:21,221 INFO L158 Benchmark]: RCFGBuilder took 428.16ms. Allocated memory is still 371.2MB. Free memory was 293.3MB in the beginning and 272.4MB in the end (delta: 21.0MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. [2023-08-26 17:42:21,221 INFO L158 Benchmark]: TraceAbstraction took 26046.83ms. Allocated memory was 371.2MB in the beginning and 671.1MB in the end (delta: 299.9MB). Free memory was 272.4MB in the beginning and 451.3MB in the end (delta: -179.0MB). Peak memory consumption was 122.0MB. Max. memory is 16.0GB. [2023-08-26 17:42:21,222 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 371.2MB. Free memory is still 348.3MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 593.62ms. Allocated memory is still 371.2MB. Free memory was 326.9MB in the beginning and 297.4MB in the end (delta: 29.5MB). Peak memory consumption was 29.4MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 43.51ms. Allocated memory is still 371.2MB. Free memory was 297.4MB in the beginning and 295.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 34.83ms. Allocated memory is still 371.2MB. Free memory was 295.3MB in the beginning and 293.3MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 428.16ms. Allocated memory is still 371.2MB. Free memory was 293.3MB in the beginning and 272.4MB in the end (delta: 21.0MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. * TraceAbstraction took 26046.83ms. Allocated memory was 371.2MB in the beginning and 671.1MB in the end (delta: 299.9MB). Free memory was 272.4MB in the beginning and 451.3MB in the end (delta: -179.0MB). Peak memory consumption was 122.0MB. 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: 25.8s, OverallIterations: 20, TraceHistogramMax: 2, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 13.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 4.5s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2403 SdHoareTripleChecker+Valid, 5.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2403 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 4.4s 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, 4.9s 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, 0.4s SatisfiabilityAnalysisTime, 5.6s 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 17:42:21,245 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...