/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/goblint-regression/04-mutex_05-lockfuns.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 18:33:00,988 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 18:33:01,065 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 18:33:01,071 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 18:33:01,071 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 18:33:01,103 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 18:33:01,104 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 18:33:01,108 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 18:33:01,109 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 18:33:01,112 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 18:33:01,112 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 18:33:01,113 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 18:33:01,113 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 18:33:01,114 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 18:33:01,114 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 18:33:01,114 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 18:33:01,114 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 18:33:01,115 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 18:33:01,115 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 18:33:01,115 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 18:33:01,115 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 18:33:01,116 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 18:33:01,116 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 18:33:01,117 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 18:33:01,117 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 18:33:01,117 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 18:33:01,117 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 18:33:01,117 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 18:33:01,118 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 18:33:01,118 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 18:33:01,119 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 18:33:01,119 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 18:33:01,119 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 18:33:01,119 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 18:33:01,119 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 18:33:01,119 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 18:33:01,446 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 18:33:01,464 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 18:33:01,466 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 18:33:01,467 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 18:33:01,468 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 18:33:01,469 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/04-mutex_05-lockfuns.i [2023-08-26 18:33:02,558 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 18:33:02,863 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 18:33:02,863 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/04-mutex_05-lockfuns.i [2023-08-26 18:33:02,879 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a3a35eabc/075e203d56b64af69edba31c14f250b7/FLAG252ebc0c4 [2023-08-26 18:33:02,894 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a3a35eabc/075e203d56b64af69edba31c14f250b7 [2023-08-26 18:33:02,896 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 18:33:02,897 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 18:33:02,898 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 18:33:02,898 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 18:33:02,900 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 18:33:02,901 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 06:33:02" (1/1) ... [2023-08-26 18:33:02,902 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ab1966e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:33:02, skipping insertion in model container [2023-08-26 18:33:02,902 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 06:33:02" (1/1) ... [2023-08-26 18:33:02,955 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 18:33:03,346 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 18:33:03,362 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 18:33:03,388 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-26 18:33:03,389 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-26 18:33:03,395 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: unsigned short [736] [2023-08-26 18:33:03,412 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 18:33:03,475 INFO L206 MainTranslator]: Completed translation [2023-08-26 18:33:03,476 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:33:03 WrapperNode [2023-08-26 18:33:03,476 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 18:33:03,477 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 18:33:03,477 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 18:33:03,477 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 18:33:03,483 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:33:03" (1/1) ... [2023-08-26 18:33:03,514 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:33:03" (1/1) ... [2023-08-26 18:33:03,534 INFO L138 Inliner]: procedures = 264, calls = 19, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 48 [2023-08-26 18:33:03,535 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 18:33:03,536 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 18:33:03,536 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 18:33:03,536 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 18:33:03,543 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:33:03" (1/1) ... [2023-08-26 18:33:03,543 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:33:03" (1/1) ... [2023-08-26 18:33:03,554 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:33:03" (1/1) ... [2023-08-26 18:33:03,554 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:33:03" (1/1) ... [2023-08-26 18:33:03,561 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:33:03" (1/1) ... [2023-08-26 18:33:03,563 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:33:03" (1/1) ... [2023-08-26 18:33:03,564 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:33:03" (1/1) ... [2023-08-26 18:33:03,564 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:33:03" (1/1) ... [2023-08-26 18:33:03,566 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 18:33:03,567 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 18:33:03,567 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 18:33:03,567 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 18:33:03,568 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:33:03" (1/1) ... [2023-08-26 18:33:03,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 18:33:03,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 18:33:03,605 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 18:33:03,612 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 18:33:03,642 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 18:33:03,642 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 18:33:03,643 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-26 18:33:03,643 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 18:33:03,643 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-26 18:33:03,643 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 18:33:03,643 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-26 18:33:03,643 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-26 18:33:03,643 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 18:33:03,643 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 18:33:03,644 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 18:33:03,645 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 18:33:03,773 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 18:33:03,774 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 18:33:03,872 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 18:33:03,877 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 18:33:03,877 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-08-26 18:33:03,879 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 06:33:03 BoogieIcfgContainer [2023-08-26 18:33:03,879 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 18:33:03,881 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 18:33:03,881 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 18:33:03,884 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 18:33:03,884 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 06:33:02" (1/3) ... [2023-08-26 18:33:03,884 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@497880a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 06:33:03, skipping insertion in model container [2023-08-26 18:33:03,885 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:33:03" (2/3) ... [2023-08-26 18:33:03,885 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@497880a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 06:33:03, skipping insertion in model container [2023-08-26 18:33:03,885 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 06:33:03" (3/3) ... [2023-08-26 18:33:03,886 INFO L112 eAbstractionObserver]: Analyzing ICFG 04-mutex_05-lockfuns.i [2023-08-26 18:33:03,900 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 18:33:03,900 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2023-08-26 18:33:03,901 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 18:33:03,936 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-26 18:33:03,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 55 places, 51 transitions, 110 flow [2023-08-26 18:33:03,991 INFO L124 PetriNetUnfolderBase]: 0/50 cut-off events. [2023-08-26 18:33:03,991 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 18:33:03,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55 conditions, 50 events. 0/50 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 32 event pairs, 0 based on Foata normal form. 0/46 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2023-08-26 18:33:03,994 INFO L82 GeneralOperation]: Start removeDead. Operand has 55 places, 51 transitions, 110 flow [2023-08-26 18:33:03,996 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 46 places, 42 transitions, 87 flow [2023-08-26 18:33:03,999 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 18:33:04,010 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 46 places, 42 transitions, 87 flow [2023-08-26 18:33:04,012 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 46 places, 42 transitions, 87 flow [2023-08-26 18:33:04,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 46 places, 42 transitions, 87 flow [2023-08-26 18:33:04,023 INFO L124 PetriNetUnfolderBase]: 0/42 cut-off events. [2023-08-26 18:33:04,024 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 18:33:04,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46 conditions, 42 events. 0/42 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 27 event pairs, 0 based on Foata normal form. 0/39 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2023-08-26 18:33:04,041 INFO L119 LiptonReduction]: Number of co-enabled transitions 240 [2023-08-26 18:33:05,352 INFO L134 LiptonReduction]: Checked pairs total: 507 [2023-08-26 18:33:05,353 INFO L136 LiptonReduction]: Total number of compositions: 38 [2023-08-26 18:33:05,365 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 18:33:05,370 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;@6a5a7e6b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 18:33:05,370 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-08-26 18:33:05,371 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 18:33:05,371 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-08-26 18:33:05,371 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 18:33:05,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:33:05,372 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-26 18:33:05,372 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-08-26 18:33:05,376 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:33:05,377 INFO L85 PathProgramCache]: Analyzing trace with hash 186, now seen corresponding path program 1 times [2023-08-26 18:33:05,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:33:05,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499131647] [2023-08-26 18:33:05,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:33:05,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:33:05,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:33:05,476 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 18:33:05,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:33:05,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499131647] [2023-08-26 18:33:05,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499131647] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:33:05,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:33:05,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-26 18:33:05,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070982811] [2023-08-26 18:33:05,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:33:05,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 18:33:05,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:33:05,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 18:33:05,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 18:33:05,508 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 89 [2023-08-26 18:33:05,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 17 places, 13 transitions, 29 flow. Second operand has 2 states, 2 states have (on average 49.5) internal successors, (99), 2 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:33:05,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:33:05,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 89 [2023-08-26 18:33:05,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:33:05,556 INFO L124 PetriNetUnfolderBase]: 20/51 cut-off events. [2023-08-26 18:33:05,557 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 18:33:05,558 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 8. Compared 114 event pairs, 20 based on Foata normal form. 0/46 useless extension candidates. Maximal degree in co-relation 98. Up to 52 conditions per place. [2023-08-26 18:33:05,560 INFO L140 encePairwiseOnDemand]: 87/89 looper letters, 11 selfloop transitions, 0 changer transitions 0/11 dead transitions. [2023-08-26 18:33:05,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 16 places, 11 transitions, 47 flow [2023-08-26 18:33:05,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 18:33:05,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 18:33:05,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 111 transitions. [2023-08-26 18:33:05,571 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6235955056179775 [2023-08-26 18:33:05,571 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 111 transitions. [2023-08-26 18:33:05,572 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 111 transitions. [2023-08-26 18:33:05,573 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:33:05,575 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 111 transitions. [2023-08-26 18:33:05,578 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 55.5) internal successors, (111), 2 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:33:05,584 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 18:33:05,585 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 18:33:05,586 INFO L175 Difference]: Start difference. First operand has 17 places, 13 transitions, 29 flow. Second operand 2 states and 111 transitions. [2023-08-26 18:33:05,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 16 places, 11 transitions, 47 flow [2023-08-26 18:33:05,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 15 places, 11 transitions, 46 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 18:33:05,591 INFO L231 Difference]: Finished difference. Result has 15 places, 11 transitions, 24 flow [2023-08-26 18:33:05,592 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=24, PETRI_DIFFERENCE_MINUEND_PLACES=14, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=11, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=24, PETRI_PLACES=15, PETRI_TRANSITIONS=11} [2023-08-26 18:33:05,595 INFO L281 CegarLoopForPetriNet]: 17 programPoint places, -2 predicate places. [2023-08-26 18:33:05,596 INFO L495 AbstractCegarLoop]: Abstraction has has 15 places, 11 transitions, 24 flow [2023-08-26 18:33:05,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 49.5) internal successors, (99), 2 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:33:05,596 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:33:05,596 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-26 18:33:05,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 18:33:05,597 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-08-26 18:33:05,597 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:33:05,597 INFO L85 PathProgramCache]: Analyzing trace with hash 1113752115, now seen corresponding path program 1 times [2023-08-26 18:33:05,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:33:05,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968771075] [2023-08-26 18:33:05,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:33:05,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:33:05,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:33:05,786 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 18:33:05,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:33:05,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968771075] [2023-08-26 18:33:05,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968771075] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:33:05,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:33:05,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 18:33:05,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619087351] [2023-08-26 18:33:05,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:33:05,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 18:33:05,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:33:05,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 18:33:05,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 18:33:05,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 89 [2023-08-26 18:33:05,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 15 places, 11 transitions, 24 flow. Second operand has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:33:05,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:33:05,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 89 [2023-08-26 18:33:05,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:33:05,813 INFO L124 PetriNetUnfolderBase]: 16/42 cut-off events. [2023-08-26 18:33:05,814 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 18:33:05,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89 conditions, 42 events. 16/42 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 83 event pairs, 16 based on Foata normal form. 0/42 useless extension candidates. Maximal degree in co-relation 86. Up to 42 conditions per place. [2023-08-26 18:33:05,814 INFO L140 encePairwiseOnDemand]: 87/89 looper letters, 9 selfloop transitions, 1 changer transitions 0/10 dead transitions. [2023-08-26 18:33:05,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 16 places, 10 transitions, 42 flow [2023-08-26 18:33:05,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 18:33:05,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 18:33:05,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 122 transitions. [2023-08-26 18:33:05,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45692883895131087 [2023-08-26 18:33:05,820 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 122 transitions. [2023-08-26 18:33:05,820 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 122 transitions. [2023-08-26 18:33:05,821 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:33:05,822 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 122 transitions. [2023-08-26 18:33:05,824 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:33:05,825 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 18:33:05,825 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 18:33:05,826 INFO L175 Difference]: Start difference. First operand has 15 places, 11 transitions, 24 flow. Second operand 3 states and 122 transitions. [2023-08-26 18:33:05,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 16 places, 10 transitions, 42 flow [2023-08-26 18:33:05,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 16 places, 10 transitions, 42 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 18:33:05,828 INFO L231 Difference]: Finished difference. Result has 16 places, 10 transitions, 24 flow [2023-08-26 18:33:05,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=22, PETRI_DIFFERENCE_MINUEND_PLACES=14, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=10, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=24, PETRI_PLACES=16, PETRI_TRANSITIONS=10} [2023-08-26 18:33:05,829 INFO L281 CegarLoopForPetriNet]: 17 programPoint places, -1 predicate places. [2023-08-26 18:33:05,830 INFO L495 AbstractCegarLoop]: Abstraction has has 16 places, 10 transitions, 24 flow [2023-08-26 18:33:05,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:33:05,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:33:05,835 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-26 18:33:05,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 18:33:05,835 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-08-26 18:33:05,835 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:33:05,836 INFO L85 PathProgramCache]: Analyzing trace with hash 1113752116, now seen corresponding path program 1 times [2023-08-26 18:33:05,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:33:05,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849667954] [2023-08-26 18:33:05,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:33:05,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:33:05,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:33:05,971 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 18:33:05,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:33:05,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849667954] [2023-08-26 18:33:05,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849667954] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:33:05,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:33:05,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 18:33:05,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173079547] [2023-08-26 18:33:05,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:33:05,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 18:33:05,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:33:05,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 18:33:05,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 18:33:05,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 89 [2023-08-26 18:33:05,974 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 16 places, 10 transitions, 24 flow. Second operand has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:33:05,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:33:05,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 89 [2023-08-26 18:33:05,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:33:05,995 INFO L124 PetriNetUnfolderBase]: 12/33 cut-off events. [2023-08-26 18:33:05,995 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 18:33:05,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73 conditions, 33 events. 12/33 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 59 event pairs, 12 based on Foata normal form. 5/38 useless extension candidates. Maximal degree in co-relation 69. Up to 33 conditions per place. [2023-08-26 18:33:05,997 INFO L140 encePairwiseOnDemand]: 87/89 looper letters, 0 selfloop transitions, 0 changer transitions 9/9 dead transitions. [2023-08-26 18:33:05,997 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 17 places, 9 transitions, 40 flow [2023-08-26 18:33:05,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 18:33:05,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 18:33:06,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 124 transitions. [2023-08-26 18:33:06,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46441947565543074 [2023-08-26 18:33:06,002 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 124 transitions. [2023-08-26 18:33:06,002 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 124 transitions. [2023-08-26 18:33:06,002 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:33:06,002 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 124 transitions. [2023-08-26 18:33:06,003 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:33:06,004 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 18:33:06,005 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 18:33:06,005 INFO L175 Difference]: Start difference. First operand has 16 places, 10 transitions, 24 flow. Second operand 3 states and 124 transitions. [2023-08-26 18:33:06,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 17 places, 9 transitions, 40 flow [2023-08-26 18:33:06,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 16 places, 9 transitions, 39 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 18:33:06,006 INFO L231 Difference]: Finished difference. Result has 16 places, 0 transitions, 0 flow [2023-08-26 18:33:06,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=21, PETRI_DIFFERENCE_MINUEND_PLACES=14, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=9, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=16, PETRI_TRANSITIONS=0} [2023-08-26 18:33:06,008 INFO L281 CegarLoopForPetriNet]: 17 programPoint places, -1 predicate places. [2023-08-26 18:33:06,010 INFO L495 AbstractCegarLoop]: Abstraction has has 16 places, 0 transitions, 0 flow [2023-08-26 18:33:06,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:33:06,013 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 5 remaining) [2023-08-26 18:33:06,013 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 5 remaining) [2023-08-26 18:33:06,013 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 5 remaining) [2023-08-26 18:33:06,014 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 5 remaining) [2023-08-26 18:33:06,014 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 5 remaining) [2023-08-26 18:33:06,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 18:33:06,014 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-26 18:33:06,020 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-26 18:33:06,020 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-26 18:33:06,025 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 06:33:06 BasicIcfg [2023-08-26 18:33:06,026 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-26 18:33:06,029 INFO L158 Benchmark]: Toolchain (without parser) took 3129.12ms. Allocated memory is still 362.8MB. Free memory was 338.2MB in the beginning and 207.4MB in the end (delta: 130.7MB). Peak memory consumption was 132.3MB. Max. memory is 16.0GB. [2023-08-26 18:33:06,029 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 362.8MB. Free memory is still 337.9MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 18:33:06,030 INFO L158 Benchmark]: CACSL2BoogieTranslator took 578.55ms. Allocated memory is still 362.8MB. Free memory was 337.7MB in the beginning and 310.9MB in the end (delta: 26.8MB). Peak memory consumption was 27.3MB. Max. memory is 16.0GB. [2023-08-26 18:33:06,030 INFO L158 Benchmark]: Boogie Procedure Inliner took 57.76ms. Allocated memory is still 362.8MB. Free memory was 310.9MB in the beginning and 308.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 18:33:06,030 INFO L158 Benchmark]: Boogie Preprocessor took 30.28ms. Allocated memory is still 362.8MB. Free memory was 308.8MB in the beginning and 307.2MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 18:33:06,031 INFO L158 Benchmark]: RCFGBuilder took 312.21ms. Allocated memory is still 362.8MB. Free memory was 307.2MB in the beginning and 294.7MB in the end (delta: 12.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2023-08-26 18:33:06,031 INFO L158 Benchmark]: TraceAbstraction took 2144.75ms. Allocated memory is still 362.8MB. Free memory was 294.1MB in the beginning and 207.4MB in the end (delta: 86.7MB). Peak memory consumption was 88.2MB. Max. memory is 16.0GB. [2023-08-26 18:33:06,038 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 362.8MB. Free memory is still 337.9MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 578.55ms. Allocated memory is still 362.8MB. Free memory was 337.7MB in the beginning and 310.9MB in the end (delta: 26.8MB). Peak memory consumption was 27.3MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 57.76ms. Allocated memory is still 362.8MB. Free memory was 310.9MB in the beginning and 308.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 30.28ms. Allocated memory is still 362.8MB. Free memory was 308.8MB in the beginning and 307.2MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 312.21ms. Allocated memory is still 362.8MB. Free memory was 307.2MB in the beginning and 294.7MB in the end (delta: 12.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * TraceAbstraction took 2144.75ms. Allocated memory is still 362.8MB. Free memory was 294.1MB in the beginning and 207.4MB in the end (delta: 86.7MB). Peak memory consumption was 88.2MB. 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] - GenericResultAtLocation [Line: 736]: Unsoundness Warning unspecified type, defaulting to int C: unsigned short [736] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.3s, 46 PlacesBefore, 17 PlacesAfterwards, 42 TransitionsBefore, 13 TransitionsAfterwards, 240 CoEnabledTransitionPairs, 5 FixpointIterations, 24 TrivialSequentialCompositions, 14 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 38 TotalNumberOfCompositions, 507 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 284, independent: 211, independent conditional: 0, independent unconditional: 211, dependent: 73, dependent conditional: 0, dependent unconditional: 73, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 131, independent: 117, independent conditional: 0, independent unconditional: 117, dependent: 14, dependent conditional: 0, dependent unconditional: 14, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 284, independent: 94, independent conditional: 0, independent unconditional: 94, dependent: 59, dependent conditional: 0, dependent unconditional: 59, unknown: 131, unknown conditional: 0, unknown unconditional: 131] , Statistics on independence cache: Total cache size (in pairs): 14, Positive cache size: 7, Positive conditional cache size: 0, Positive unconditional cache size: 7, 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 - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 3 procedures, 64 locations, 5 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: 2.1s, OverallIterations: 3, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.4s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 9 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 9 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 0 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 30 IncrementalHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 0 mSolverCounterUnsat, 0 mSDtfsCounter, 30 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=29occurred in iteration=0, InterpolantAutomatonStates: 8, 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, 0.0s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 13 NumberOfCodeBlocks, 13 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 10 ConstructedInterpolants, 0 QuantifiedInterpolants, 70 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 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 4 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-26 18:33:06,053 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...