/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.order.of.the.error.locations.to.be.checked INSUFFICIENT_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.pointer.base.address.is.valid.at.dereference ASSERTandASSUME --cacsl2boogietranslator.pointer.to.allocated.memory.at.dereference ASSERTandASSUME --cacsl2boogietranslator.check.array.bounds.for.arrays.that.are.off.heap ASSERTandASSUME --cacsl2boogietranslator.check.if.freed.pointer.was.valid true --cacsl2boogietranslator.adapt.memory.model.on.pointer.casts.if.necessary true -i ../../../trunk/examples/svcomp/goblint-regression/04-mutex_22-deref_read.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 15:29:27,274 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 15:29:27,344 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-08-26 15:29:27,348 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 15:29:27,353 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 15:29:27,388 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 15:29:27,389 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 15:29:27,389 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 15:29:27,389 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 15:29:27,393 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 15:29:27,393 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 15:29:27,393 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 15:29:27,394 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 15:29:27,395 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 15:29:27,395 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 15:29:27,395 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 15:29:27,395 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 15:29:27,396 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 15:29:27,396 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 15:29:27,396 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 15:29:27,396 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 15:29:27,397 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 15:29:27,397 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 15:29:27,398 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 15:29:27,398 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 15:29:27,398 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 15:29:27,398 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 15:29:27,399 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 15:29:27,399 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 15:29:27,399 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 15:29:27,400 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 15:29:27,400 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 15:29:27,400 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 15:29:27,400 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 15:29:27,400 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 15:29:27,401 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 15:29:27,707 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 15:29:27,723 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 15:29:27,724 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 15:29:27,725 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 15:29:27,726 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 15:29:27,728 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/04-mutex_22-deref_read.i [2023-08-26 15:29:28,994 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 15:29:29,290 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 15:29:29,290 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/04-mutex_22-deref_read.i [2023-08-26 15:29:29,300 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9cc5ffbf7/67c74725fe1e42cf9afa25f1bb1bfa52/FLAG0149efeda [2023-08-26 15:29:29,310 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9cc5ffbf7/67c74725fe1e42cf9afa25f1bb1bfa52 [2023-08-26 15:29:29,311 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 15:29:29,313 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 15:29:29,314 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 15:29:29,314 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 15:29:29,316 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 15:29:29,317 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 03:29:29" (1/1) ... [2023-08-26 15:29:29,317 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37d010a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:29:29, skipping insertion in model container [2023-08-26 15:29:29,318 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 03:29:29" (1/1) ... [2023-08-26 15:29:29,355 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 15:29:29,595 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 15:29:29,610 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 15:29:29,638 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-26 15:29:29,640 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-26 15:29:29,650 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 15:29:29,689 INFO L206 MainTranslator]: Completed translation [2023-08-26 15:29:29,690 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:29:29 WrapperNode [2023-08-26 15:29:29,690 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 15:29:29,691 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 15:29:29,691 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 15:29:29,691 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 15:29:29,697 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:29:29" (1/1) ... [2023-08-26 15:29:29,724 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:29:29" (1/1) ... [2023-08-26 15:29:29,743 INFO L138 Inliner]: procedures = 162, calls = 19, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 35 [2023-08-26 15:29:29,743 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 15:29:29,744 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 15:29:29,744 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 15:29:29,744 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 15:29:29,751 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:29:29" (1/1) ... [2023-08-26 15:29:29,751 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:29:29" (1/1) ... [2023-08-26 15:29:29,757 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:29:29" (1/1) ... [2023-08-26 15:29:29,758 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:29:29" (1/1) ... [2023-08-26 15:29:29,774 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:29:29" (1/1) ... [2023-08-26 15:29:29,775 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:29:29" (1/1) ... [2023-08-26 15:29:29,776 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:29:29" (1/1) ... [2023-08-26 15:29:29,777 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:29:29" (1/1) ... [2023-08-26 15:29:29,779 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 15:29:29,779 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 15:29:29,779 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 15:29:29,779 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 15:29:29,780 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:29:29" (1/1) ... [2023-08-26 15:29:29,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 15:29:29,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 15:29:29,810 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-26 15:29:29,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-26 15:29:29,854 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 15:29:29,854 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-26 15:29:29,855 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 15:29:29,855 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 15:29:29,855 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-26 15:29:29,855 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-26 15:29:29,855 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 15:29:29,855 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 15:29:29,856 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 15:29:29,856 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 15:29:29,857 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-26 15:29:29,987 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 15:29:29,991 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 15:29:30,149 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 15:29:30,155 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 15:29:30,155 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-08-26 15:29:30,156 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 03:29:30 BoogieIcfgContainer [2023-08-26 15:29:30,157 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 15:29:30,159 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 15:29:30,159 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 15:29:30,162 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 15:29:30,162 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 03:29:29" (1/3) ... [2023-08-26 15:29:30,162 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a967227 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 03:29:30, skipping insertion in model container [2023-08-26 15:29:30,162 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:29:29" (2/3) ... [2023-08-26 15:29:30,163 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a967227 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 03:29:30, skipping insertion in model container [2023-08-26 15:29:30,163 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 03:29:30" (3/3) ... [2023-08-26 15:29:30,164 INFO L112 eAbstractionObserver]: Analyzing ICFG 04-mutex_22-deref_read.i [2023-08-26 15:29:30,183 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 15:29:30,183 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2023-08-26 15:29:30,184 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 15:29:30,219 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-26 15:29:30,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 48 transitions, 101 flow [2023-08-26 15:29:30,270 INFO L124 PetriNetUnfolderBase]: 0/47 cut-off events. [2023-08-26 15:29:30,271 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 15:29:30,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51 conditions, 47 events. 0/47 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 37 event pairs, 0 based on Foata normal form. 0/41 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2023-08-26 15:29:30,274 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 48 transitions, 101 flow [2023-08-26 15:29:30,277 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 51 places, 47 transitions, 97 flow [2023-08-26 15:29:30,280 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 15:29:30,288 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 51 places, 47 transitions, 97 flow [2023-08-26 15:29:30,291 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 51 places, 47 transitions, 97 flow [2023-08-26 15:29:30,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 47 transitions, 97 flow [2023-08-26 15:29:30,326 INFO L124 PetriNetUnfolderBase]: 0/47 cut-off events. [2023-08-26 15:29:30,327 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 15:29:30,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51 conditions, 47 events. 0/47 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 37 event pairs, 0 based on Foata normal form. 0/41 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2023-08-26 15:29:30,328 INFO L119 LiptonReduction]: Number of co-enabled transitions 252 [2023-08-26 15:29:32,400 INFO L134 LiptonReduction]: Checked pairs total: 629 [2023-08-26 15:29:32,401 INFO L136 LiptonReduction]: Total number of compositions: 41 [2023-08-26 15:29:32,414 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 15:29:32,419 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;@665821e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 15:29:32,420 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2023-08-26 15:29:32,421 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 15:29:32,421 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-08-26 15:29:32,421 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 15:29:32,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:29:32,422 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-26 15:29:32,422 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-08-26 15:29:32,426 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:29:32,427 INFO L85 PathProgramCache]: Analyzing trace with hash 176, now seen corresponding path program 1 times [2023-08-26 15:29:32,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:29:32,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604644054] [2023-08-26 15:29:32,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:29:32,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:29:32,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:29:32,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 15:29:32,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:29:32,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604644054] [2023-08-26 15:29:32,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604644054] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:29:32,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:29:32,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-26 15:29:32,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838005881] [2023-08-26 15:29:32,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:29:32,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 15:29:32,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:29:32,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 15:29:32,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 15:29:32,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 89 [2023-08-26 15:29:32,557 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 15 transitions, 33 flow. Second operand has 2 states, 2 states have (on average 47.5) internal successors, (95), 2 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:29:32,557 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:29:32,557 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 89 [2023-08-26 15:29:32,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:29:32,596 INFO L124 PetriNetUnfolderBase]: 25/63 cut-off events. [2023-08-26 15:29:32,596 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 15:29:32,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130 conditions, 63 events. 25/63 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 209 event pairs, 25 based on Foata normal form. 0/37 useless extension candidates. Maximal degree in co-relation 121. Up to 63 conditions per place. [2023-08-26 15:29:32,598 INFO L140 encePairwiseOnDemand]: 87/89 looper letters, 12 selfloop transitions, 0 changer transitions 0/13 dead transitions. [2023-08-26 15:29:32,598 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 18 places, 13 transitions, 53 flow [2023-08-26 15:29:32,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 15:29:32,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 15:29:32,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 108 transitions. [2023-08-26 15:29:32,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6067415730337079 [2023-08-26 15:29:32,609 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 108 transitions. [2023-08-26 15:29:32,609 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 108 transitions. [2023-08-26 15:29:32,610 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:29:32,612 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 108 transitions. [2023-08-26 15:29:32,614 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 54.0) internal successors, (108), 2 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:29:32,617 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:29:32,618 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:29:32,619 INFO L175 Difference]: Start difference. First operand has 19 places, 15 transitions, 33 flow. Second operand 2 states and 108 transitions. [2023-08-26 15:29:32,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 18 places, 13 transitions, 53 flow [2023-08-26 15:29:32,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 17 places, 13 transitions, 52 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 15:29:32,623 INFO L231 Difference]: Finished difference. Result has 17 places, 13 transitions, 28 flow [2023-08-26 15:29:32,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=28, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=13, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=28, PETRI_PLACES=17, PETRI_TRANSITIONS=13} [2023-08-26 15:29:32,628 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, -2 predicate places. [2023-08-26 15:29:32,628 INFO L495 AbstractCegarLoop]: Abstraction has has 17 places, 13 transitions, 28 flow [2023-08-26 15:29:32,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 47.5) internal successors, (95), 2 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:29:32,629 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:29:32,629 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 15:29:32,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 15:29:32,629 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-08-26 15:29:32,630 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:29:32,630 INFO L85 PathProgramCache]: Analyzing trace with hash 174487, now seen corresponding path program 1 times [2023-08-26 15:29:32,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:29:32,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575051509] [2023-08-26 15:29:32,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:29:32,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:29:32,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:29:32,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 15:29:32,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:29:32,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575051509] [2023-08-26 15:29:32,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575051509] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:29:32,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:29:32,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 15:29:32,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493015916] [2023-08-26 15:29:32,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:29:32,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 15:29:32,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:29:32,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 15:29:32,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 15:29:32,875 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 89 [2023-08-26 15:29:32,875 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 17 places, 13 transitions, 28 flow. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:29:32,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:29:32,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 89 [2023-08-26 15:29:32,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:29:32,902 INFO L124 PetriNetUnfolderBase]: 20/51 cut-off events. [2023-08-26 15:29:32,902 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 15:29:32,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107 conditions, 51 events. 20/51 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 126 event pairs, 20 based on Foata normal form. 0/40 useless extension candidates. Maximal degree in co-relation 104. Up to 51 conditions per place. [2023-08-26 15:29:32,903 INFO L140 encePairwiseOnDemand]: 86/89 looper letters, 10 selfloop transitions, 1 changer transitions 0/11 dead transitions. [2023-08-26 15:29:32,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 17 places, 11 transitions, 46 flow [2023-08-26 15:29:32,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 15:29:32,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 15:29:32,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 118 transitions. [2023-08-26 15:29:32,905 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4419475655430712 [2023-08-26 15:29:32,905 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 118 transitions. [2023-08-26 15:29:32,905 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 118 transitions. [2023-08-26 15:29:32,905 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:29:32,906 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 118 transitions. [2023-08-26 15:29:32,906 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:29:32,907 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 89.0) internal successors, (356), 4 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:29:32,908 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 89.0) internal successors, (356), 4 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:29:32,908 INFO L175 Difference]: Start difference. First operand has 17 places, 13 transitions, 28 flow. Second operand 3 states and 118 transitions. [2023-08-26 15:29:32,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 17 places, 11 transitions, 46 flow [2023-08-26 15:29:32,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 17 places, 11 transitions, 46 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 15:29:32,909 INFO L231 Difference]: Finished difference. Result has 17 places, 11 transitions, 26 flow [2023-08-26 15:29:32,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=24, PETRI_DIFFERENCE_MINUEND_PLACES=15, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=11, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=26, PETRI_PLACES=17, PETRI_TRANSITIONS=11} [2023-08-26 15:29:32,909 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, -2 predicate places. [2023-08-26 15:29:32,910 INFO L495 AbstractCegarLoop]: Abstraction has has 17 places, 11 transitions, 26 flow [2023-08-26 15:29:32,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:29:32,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:29:32,910 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 15:29:32,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 15:29:32,911 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-08-26 15:29:32,911 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:29:32,911 INFO L85 PathProgramCache]: Analyzing trace with hash 174486, now seen corresponding path program 1 times [2023-08-26 15:29:32,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:29:32,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101291932] [2023-08-26 15:29:32,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:29:32,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:29:32,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:29:33,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 15:29:33,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:29:33,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101291932] [2023-08-26 15:29:33,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101291932] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:29:33,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:29:33,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 15:29:33,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136163026] [2023-08-26 15:29:33,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:29:33,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 15:29:33,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:29:33,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 15:29:33,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 15:29:33,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 89 [2023-08-26 15:29:33,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 17 places, 11 transitions, 26 flow. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:29:33,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:29:33,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 89 [2023-08-26 15:29:33,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:29:33,056 INFO L124 PetriNetUnfolderBase]: 12/34 cut-off events. [2023-08-26 15:29:33,057 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 15:29:33,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75 conditions, 34 events. 12/34 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 61 event pairs, 9 based on Foata normal form. 0/33 useless extension candidates. Maximal degree in co-relation 71. Up to 26 conditions per place. [2023-08-26 15:29:33,057 INFO L140 encePairwiseOnDemand]: 85/89 looper letters, 7 selfloop transitions, 2 changer transitions 4/13 dead transitions. [2023-08-26 15:29:33,057 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 18 places, 13 transitions, 56 flow [2023-08-26 15:29:33,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 15:29:33,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 15:29:33,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 114 transitions. [2023-08-26 15:29:33,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42696629213483145 [2023-08-26 15:29:33,062 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 114 transitions. [2023-08-26 15:29:33,062 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 114 transitions. [2023-08-26 15:29:33,063 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:29:33,063 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 114 transitions. [2023-08-26 15:29:33,064 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:29:33,064 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 89.0) internal successors, (356), 4 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:29:33,065 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 89.0) internal successors, (356), 4 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:29:33,065 INFO L175 Difference]: Start difference. First operand has 17 places, 11 transitions, 26 flow. Second operand 3 states and 114 transitions. [2023-08-26 15:29:33,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 18 places, 13 transitions, 56 flow [2023-08-26 15:29:33,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 17 places, 13 transitions, 55 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 15:29:33,067 INFO L231 Difference]: Finished difference. Result has 18 places, 8 transitions, 27 flow [2023-08-26 15:29:33,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=23, PETRI_DIFFERENCE_MINUEND_PLACES=15, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=10, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=27, PETRI_PLACES=18, PETRI_TRANSITIONS=8} [2023-08-26 15:29:33,068 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, -1 predicate places. [2023-08-26 15:29:33,068 INFO L495 AbstractCegarLoop]: Abstraction has has 18 places, 8 transitions, 27 flow [2023-08-26 15:29:33,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:29:33,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:29:33,069 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:29:33,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 15:29:33,069 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-08-26 15:29:33,070 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:29:33,070 INFO L85 PathProgramCache]: Analyzing trace with hash 305581100, now seen corresponding path program 1 times [2023-08-26 15:29:33,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:29:33,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993280234] [2023-08-26 15:29:33,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:29:33,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:29:33,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:29:33,169 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 15:29:33,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:29:33,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993280234] [2023-08-26 15:29:33,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993280234] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:29:33,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:29:33,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 15:29:33,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017238118] [2023-08-26 15:29:33,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:29:33,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 15:29:33,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:29:33,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 15:29:33,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 15:29:33,175 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 89 [2023-08-26 15:29:33,175 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 18 places, 8 transitions, 27 flow. Second operand has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:29:33,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:29:33,175 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 89 [2023-08-26 15:29:33,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:29:33,197 INFO L124 PetriNetUnfolderBase]: 1/11 cut-off events. [2023-08-26 15:29:33,197 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 15:29:33,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35 conditions, 11 events. 1/11 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 5 event pairs, 0 based on Foata normal form. 2/13 useless extension candidates. Maximal degree in co-relation 30. Up to 6 conditions per place. [2023-08-26 15:29:33,197 INFO L140 encePairwiseOnDemand]: 86/89 looper letters, 5 selfloop transitions, 3 changer transitions 0/9 dead transitions. [2023-08-26 15:29:33,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 18 places, 9 transitions, 48 flow [2023-08-26 15:29:33,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 15:29:33,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 15:29:33,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 121 transitions. [2023-08-26 15:29:33,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45318352059925093 [2023-08-26 15:29:33,199 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 121 transitions. [2023-08-26 15:29:33,199 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 121 transitions. [2023-08-26 15:29:33,200 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:29:33,200 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 121 transitions. [2023-08-26 15:29:33,201 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:29:33,203 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 89.0) internal successors, (356), 4 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:29:33,203 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 89.0) internal successors, (356), 4 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:29:33,203 INFO L175 Difference]: Start difference. First operand has 18 places, 8 transitions, 27 flow. Second operand 3 states and 121 transitions. [2023-08-26 15:29:33,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 18 places, 9 transitions, 48 flow [2023-08-26 15:29:33,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 16 places, 9 transitions, 42 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 15:29:33,205 INFO L231 Difference]: Finished difference. Result has 16 places, 8 transitions, 29 flow [2023-08-26 15:29:33,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=23, PETRI_DIFFERENCE_MINUEND_PLACES=14, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=8, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=5, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=29, PETRI_PLACES=16, PETRI_TRANSITIONS=8} [2023-08-26 15:29:33,206 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, -3 predicate places. [2023-08-26 15:29:33,206 INFO L495 AbstractCegarLoop]: Abstraction has has 16 places, 8 transitions, 29 flow [2023-08-26 15:29:33,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:29:33,206 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:29:33,207 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:29:33,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 15:29:33,207 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-08-26 15:29:33,208 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:29:33,208 INFO L85 PathProgramCache]: Analyzing trace with hash 274121060, now seen corresponding path program 2 times [2023-08-26 15:29:33,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:29:33,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936650230] [2023-08-26 15:29:33,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:29:33,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:29:33,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:29:33,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 15:29:33,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:29:33,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936650230] [2023-08-26 15:29:33,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936650230] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:29:33,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:29:33,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 15:29:33,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905916423] [2023-08-26 15:29:33,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:29:33,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 15:29:33,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:29:33,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 15:29:33,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-26 15:29:33,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 89 [2023-08-26 15:29:33,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 16 places, 8 transitions, 29 flow. Second operand has 6 states, 6 states have (on average 29.333333333333332) internal successors, (176), 6 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:29:33,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:29:33,348 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 89 [2023-08-26 15:29:33,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:29:33,398 INFO L124 PetriNetUnfolderBase]: 1/10 cut-off events. [2023-08-26 15:29:33,398 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 15:29:33,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35 conditions, 10 events. 1/10 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 5 event pairs, 0 based on Foata normal form. 1/11 useless extension candidates. Maximal degree in co-relation 30. Up to 4 conditions per place. [2023-08-26 15:29:33,400 INFO L140 encePairwiseOnDemand]: 85/89 looper letters, 0 selfloop transitions, 0 changer transitions 9/9 dead transitions. [2023-08-26 15:29:33,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 19 places, 9 transitions, 51 flow [2023-08-26 15:29:33,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 15:29:33,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 15:29:33,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 150 transitions. [2023-08-26 15:29:33,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33707865168539325 [2023-08-26 15:29:33,405 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 150 transitions. [2023-08-26 15:29:33,405 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 150 transitions. [2023-08-26 15:29:33,405 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:29:33,405 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 150 transitions. [2023-08-26 15:29:33,406 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 30.0) internal successors, (150), 5 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:29:33,407 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 89.0) internal successors, (534), 6 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:29:33,407 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 89.0) internal successors, (534), 6 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:29:33,407 INFO L175 Difference]: Start difference. First operand has 16 places, 8 transitions, 29 flow. Second operand 5 states and 150 transitions. [2023-08-26 15:29:33,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 19 places, 9 transitions, 51 flow [2023-08-26 15:29:33,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 17 places, 9 transitions, 44 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 15:29:33,407 INFO L231 Difference]: Finished difference. Result has 17 places, 0 transitions, 0 flow [2023-08-26 15:29:33,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=20, PETRI_DIFFERENCE_MINUEND_PLACES=13, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=7, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=7, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=17, PETRI_TRANSITIONS=0} [2023-08-26 15:29:33,408 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, -2 predicate places. [2023-08-26 15:29:33,408 INFO L495 AbstractCegarLoop]: Abstraction has has 17 places, 0 transitions, 0 flow [2023-08-26 15:29:33,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 29.333333333333332) internal successors, (176), 6 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:29:33,411 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 9 remaining) [2023-08-26 15:29:33,412 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 9 remaining) [2023-08-26 15:29:33,412 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 9 remaining) [2023-08-26 15:29:33,412 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 9 remaining) [2023-08-26 15:29:33,412 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 9 remaining) [2023-08-26 15:29:33,412 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 9 remaining) [2023-08-26 15:29:33,412 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 9 remaining) [2023-08-26 15:29:33,413 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 9 remaining) [2023-08-26 15:29:33,413 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 9 remaining) [2023-08-26 15:29:33,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 15:29:33,414 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1] [2023-08-26 15:29:33,418 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-26 15:29:33,418 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-26 15:29:33,420 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 03:29:33 BasicIcfg [2023-08-26 15:29:33,421 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-26 15:29:33,421 INFO L158 Benchmark]: Toolchain (without parser) took 4108.44ms. Allocated memory was 377.5MB in the beginning and 453.0MB in the end (delta: 75.5MB). Free memory was 352.9MB in the beginning and 374.2MB in the end (delta: -21.3MB). Peak memory consumption was 57.3MB. Max. memory is 16.0GB. [2023-08-26 15:29:33,421 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 377.5MB. Free memory is still 353.8MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 15:29:33,422 INFO L158 Benchmark]: CACSL2BoogieTranslator took 376.47ms. Allocated memory is still 377.5MB. Free memory was 352.5MB in the beginning and 334.1MB in the end (delta: 18.4MB). Peak memory consumption was 16.8MB. Max. memory is 16.0GB. [2023-08-26 15:29:33,422 INFO L158 Benchmark]: Boogie Procedure Inliner took 52.15ms. Allocated memory is still 377.5MB. Free memory was 334.1MB in the beginning and 332.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 15:29:33,423 INFO L158 Benchmark]: Boogie Preprocessor took 35.13ms. Allocated memory is still 377.5MB. Free memory was 332.1MB in the beginning and 330.8MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 15:29:33,423 INFO L158 Benchmark]: RCFGBuilder took 377.34ms. Allocated memory is still 377.5MB. Free memory was 330.8MB in the beginning and 318.6MB in the end (delta: 12.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2023-08-26 15:29:33,423 INFO L158 Benchmark]: TraceAbstraction took 3261.83ms. Allocated memory was 377.5MB in the beginning and 453.0MB in the end (delta: 75.5MB). Free memory was 317.9MB in the beginning and 374.2MB in the end (delta: -56.3MB). Peak memory consumption was 21.7MB. Max. memory is 16.0GB. [2023-08-26 15:29:33,425 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 377.5MB. Free memory is still 353.8MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 376.47ms. Allocated memory is still 377.5MB. Free memory was 352.5MB in the beginning and 334.1MB in the end (delta: 18.4MB). Peak memory consumption was 16.8MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 52.15ms. Allocated memory is still 377.5MB. Free memory was 334.1MB in the beginning and 332.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 35.13ms. Allocated memory is still 377.5MB. Free memory was 332.1MB in the beginning and 330.8MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 377.34ms. Allocated memory is still 377.5MB. Free memory was 330.8MB in the beginning and 318.6MB in the end (delta: 12.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * TraceAbstraction took 3261.83ms. Allocated memory was 377.5MB in the beginning and 453.0MB in the end (delta: 75.5MB). Free memory was 317.9MB in the beginning and 374.2MB in the end (delta: -56.3MB). Peak memory consumption was 21.7MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResultAtLocation [Line: 244]: Unsoundness Warning unspecified type, defaulting to int C: short [244] - GenericResultAtLocation [Line: 244]: Unsoundness Warning unspecified type, defaulting to int C: short [244] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.1s, 51 PlacesBefore, 19 PlacesAfterwards, 47 TransitionsBefore, 15 TransitionsAfterwards, 252 CoEnabledTransitionPairs, 6 FixpointIterations, 24 TrivialSequentialCompositions, 17 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 41 TotalNumberOfCompositions, 629 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 329, independent: 255, independent conditional: 0, independent unconditional: 255, dependent: 74, dependent conditional: 0, dependent unconditional: 74, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 145, independent: 127, independent conditional: 0, independent unconditional: 127, dependent: 18, dependent conditional: 0, dependent unconditional: 18, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 329, independent: 128, independent conditional: 0, independent unconditional: 128, dependent: 56, dependent conditional: 0, dependent unconditional: 56, unknown: 145, unknown conditional: 0, unknown unconditional: 145] , Statistics on independence cache: Total cache size (in pairs): 20, Positive cache size: 13, Positive conditional cache size: 0, Positive unconditional cache size: 13, Negative cache size: 7, Negative conditional cache size: 0, Negative unconditional cache size: 7, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 3 procedures, 60 locations, 9 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: 3.2s, OverallIterations: 5, TraceHistogramMax: 1, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.2s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 27 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 27 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 5 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 66 IncrementalHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 5 mSolverCounterUnsat, 0 mSDtfsCounter, 66 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=33occurred in iteration=0, InterpolantAutomatonStates: 16, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 23 NumberOfCodeBlocks, 23 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 18 ConstructedInterpolants, 0 QuantifiedInterpolants, 121 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 5 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 6 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-26 15:29:33,442 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...