/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_10-ptrmunge_nr.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 15:28:53,790 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 15:28:53,849 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 15:28:53,853 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 15:28:53,854 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 15:28:53,872 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 15:28:53,873 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 15:28:53,873 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 15:28:53,874 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 15:28:53,874 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 15:28:53,874 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 15:28:53,875 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 15:28:53,875 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 15:28:53,875 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 15:28:53,876 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 15:28:53,876 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 15:28:53,876 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 15:28:53,876 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 15:28:53,877 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 15:28:53,877 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 15:28:53,877 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 15:28:53,880 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 15:28:53,880 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 15:28:53,881 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 15:28:53,881 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 15:28:53,881 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 15:28:53,881 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 15:28:53,882 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 15:28:53,882 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 15:28:53,882 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 15:28:53,882 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 15:28:53,883 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 15:28:53,883 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 15:28:53,883 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 15:28:53,883 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 15:28:53,884 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 15:28:54,202 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 15:28:54,226 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 15:28:54,228 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 15:28:54,230 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 15:28:54,231 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 15:28:54,232 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/04-mutex_10-ptrmunge_nr.i [2023-08-26 15:28:55,371 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 15:28:55,614 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 15:28:55,615 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/04-mutex_10-ptrmunge_nr.i [2023-08-26 15:28:55,632 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/85f618524/4be8350ca7004387b91324fb3705089e/FLAGca472f0b3 [2023-08-26 15:28:55,645 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/85f618524/4be8350ca7004387b91324fb3705089e [2023-08-26 15:28:55,647 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 15:28:55,648 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 15:28:55,649 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 15:28:55,649 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 15:28:55,652 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 15:28:55,652 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 03:28:55" (1/1) ... [2023-08-26 15:28:55,653 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64eb6d85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:28:55, skipping insertion in model container [2023-08-26 15:28:55,653 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 03:28:55" (1/1) ... [2023-08-26 15:28:55,708 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 15:28:56,095 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 15:28:56,110 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 15:28:56,139 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-26 15:28:56,140 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-26 15:28:56,147 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: unsigned short [736] [2023-08-26 15:28:56,163 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 15:28:56,233 INFO L206 MainTranslator]: Completed translation [2023-08-26 15:28:56,233 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:28:56 WrapperNode [2023-08-26 15:28:56,234 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 15:28:56,234 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 15:28:56,234 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 15:28:56,234 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 15:28:56,240 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:28:56" (1/1) ... [2023-08-26 15:28:56,261 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:28:56" (1/1) ... [2023-08-26 15:28:56,286 INFO L138 Inliner]: procedures = 263, calls = 29, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 62 [2023-08-26 15:28:56,286 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 15:28:56,287 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 15:28:56,287 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 15:28:56,287 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 15:28:56,294 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:28:56" (1/1) ... [2023-08-26 15:28:56,295 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:28:56" (1/1) ... [2023-08-26 15:28:56,298 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:28:56" (1/1) ... [2023-08-26 15:28:56,298 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:28:56" (1/1) ... [2023-08-26 15:28:56,302 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:28:56" (1/1) ... [2023-08-26 15:28:56,303 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:28:56" (1/1) ... [2023-08-26 15:28:56,305 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:28:56" (1/1) ... [2023-08-26 15:28:56,306 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:28:56" (1/1) ... [2023-08-26 15:28:56,308 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 15:28:56,308 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 15:28:56,308 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 15:28:56,309 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 15:28:56,309 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:28:56" (1/1) ... [2023-08-26 15:28:56,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 15:28:56,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 15:28:56,337 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 15:28:56,343 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 15:28:56,369 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 15:28:56,369 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 15:28:56,369 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-26 15:28:56,369 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 15:28:56,369 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-26 15:28:56,370 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 15:28:56,370 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-26 15:28:56,370 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-26 15:28:56,370 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 15:28:56,370 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 15:28:56,370 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 15:28:56,371 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 15:28:56,485 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 15:28:56,486 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 15:28:56,693 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 15:28:56,699 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 15:28:56,699 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-08-26 15:28:56,701 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 03:28:56 BoogieIcfgContainer [2023-08-26 15:28:56,701 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 15:28:56,703 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 15:28:56,703 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 15:28:56,705 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 15:28:56,706 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 03:28:55" (1/3) ... [2023-08-26 15:28:56,706 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f66f33e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 03:28:56, skipping insertion in model container [2023-08-26 15:28:56,706 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:28:56" (2/3) ... [2023-08-26 15:28:56,707 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f66f33e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 03:28:56, skipping insertion in model container [2023-08-26 15:28:56,707 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 03:28:56" (3/3) ... [2023-08-26 15:28:56,708 INFO L112 eAbstractionObserver]: Analyzing ICFG 04-mutex_10-ptrmunge_nr.i [2023-08-26 15:28:56,725 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 15:28:56,725 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 12 error locations. [2023-08-26 15:28:56,725 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 15:28:56,815 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-26 15:28:56,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 81 places, 77 transitions, 162 flow [2023-08-26 15:28:56,906 INFO L124 PetriNetUnfolderBase]: 0/76 cut-off events. [2023-08-26 15:28:56,907 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 15:28:56,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81 conditions, 76 events. 0/76 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 78 event pairs, 0 based on Foata normal form. 0/64 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2023-08-26 15:28:56,910 INFO L82 GeneralOperation]: Start removeDead. Operand has 81 places, 77 transitions, 162 flow [2023-08-26 15:28:56,915 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 73 places, 69 transitions, 141 flow [2023-08-26 15:28:56,918 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 15:28:56,930 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 73 places, 69 transitions, 141 flow [2023-08-26 15:28:56,933 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 73 places, 69 transitions, 141 flow [2023-08-26 15:28:56,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 73 places, 69 transitions, 141 flow [2023-08-26 15:28:56,963 INFO L124 PetriNetUnfolderBase]: 0/69 cut-off events. [2023-08-26 15:28:56,963 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 15:28:56,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73 conditions, 69 events. 0/69 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 76 event pairs, 0 based on Foata normal form. 0/57 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2023-08-26 15:28:56,964 INFO L119 LiptonReduction]: Number of co-enabled transitions 680 [2023-08-26 15:29:00,190 INFO L134 LiptonReduction]: Checked pairs total: 1930 [2023-08-26 15:29:00,191 INFO L136 LiptonReduction]: Total number of compositions: 76 [2023-08-26 15:29:00,201 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 15:29:00,207 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;@752316a8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 15:29:00,207 INFO L358 AbstractCegarLoop]: Starting to check reachability of 17 error locations. [2023-08-26 15:29:00,208 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 15:29:00,208 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-08-26 15:29:00,208 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 15:29:00,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:29:00,209 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-26 15:29:00,209 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-26 15:29:00,213 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:29:00,213 INFO L85 PathProgramCache]: Analyzing trace with hash 280, now seen corresponding path program 1 times [2023-08-26 15:29:00,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:29:00,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059740223] [2023-08-26 15:29:00,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:29:00,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:29:00,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:29:00,298 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 15:29:00,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:29:00,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059740223] [2023-08-26 15:29:00,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059740223] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:29:00,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:29:00,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-26 15:29:00,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917582998] [2023-08-26 15:29:00,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:29:00,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 15:29:00,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:29:00,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 15:29:00,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 15:29:00,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 153 [2023-08-26 15:29:00,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 23 transitions, 49 flow. Second operand has 2 states, 2 states have (on average 75.5) internal successors, (151), 2 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:29:00,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:29:00,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 153 [2023-08-26 15:29:00,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:29:00,392 INFO L124 PetriNetUnfolderBase]: 40/105 cut-off events. [2023-08-26 15:29:00,392 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 15:29:00,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 205 conditions, 105 events. 40/105 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 394 event pairs, 40 based on Foata normal form. 0/62 useless extension candidates. Maximal degree in co-relation 196. Up to 96 conditions per place. [2023-08-26 15:29:00,396 INFO L140 encePairwiseOnDemand]: 147/153 looper letters, 15 selfloop transitions, 0 changer transitions 0/17 dead transitions. [2023-08-26 15:29:00,396 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 17 transitions, 67 flow [2023-08-26 15:29:00,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 15:29:00,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 15:29:00,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 171 transitions. [2023-08-26 15:29:00,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5588235294117647 [2023-08-26 15:29:00,409 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 171 transitions. [2023-08-26 15:29:00,410 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 171 transitions. [2023-08-26 15:29:00,411 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:29:00,413 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 171 transitions. [2023-08-26 15:29:00,419 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 85.5) internal successors, (171), 2 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:29:00,424 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 153.0) internal successors, (459), 3 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:29:00,424 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 153.0) internal successors, (459), 3 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:29:00,426 INFO L175 Difference]: Start difference. First operand has 27 places, 23 transitions, 49 flow. Second operand 2 states and 171 transitions. [2023-08-26 15:29:00,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 17 transitions, 67 flow [2023-08-26 15:29:00,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 17 transitions, 66 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 15:29:00,429 INFO L231 Difference]: Finished difference. Result has 21 places, 17 transitions, 36 flow [2023-08-26 15:29:00,430 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=153, PETRI_DIFFERENCE_MINUEND_FLOW=36, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=36, PETRI_PLACES=21, PETRI_TRANSITIONS=17} [2023-08-26 15:29:00,433 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, -6 predicate places. [2023-08-26 15:29:00,434 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 17 transitions, 36 flow [2023-08-26 15:29:00,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 75.5) internal successors, (151), 2 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:29:00,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:29:00,434 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 15:29:00,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 15:29:00,435 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-26 15:29:00,436 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:29:00,436 INFO L85 PathProgramCache]: Analyzing trace with hash 276640, now seen corresponding path program 1 times [2023-08-26 15:29:00,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:29:00,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778761712] [2023-08-26 15:29:00,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:29:00,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:29:00,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:29:00,701 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 15:29:00,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:29:00,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778761712] [2023-08-26 15:29:00,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778761712] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:29:00,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:29:00,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 15:29:00,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880926870] [2023-08-26 15:29:00,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:29:00,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 15:29:00,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:29:00,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 15:29:00,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 15:29:00,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 153 [2023-08-26 15:29:00,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 36 flow. Second operand has 3 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:29:00,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:29:00,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 153 [2023-08-26 15:29:00,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:29:00,739 INFO L124 PetriNetUnfolderBase]: 45/106 cut-off events. [2023-08-26 15:29:00,739 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 15:29:00,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 217 conditions, 106 events. 45/106 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 338 event pairs, 45 based on Foata normal form. 0/72 useless extension candidates. Maximal degree in co-relation 214. Up to 106 conditions per place. [2023-08-26 15:29:00,740 INFO L140 encePairwiseOnDemand]: 151/153 looper letters, 15 selfloop transitions, 1 changer transitions 0/16 dead transitions. [2023-08-26 15:29:00,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 16 transitions, 66 flow [2023-08-26 15:29:00,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 15:29:00,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 15:29:00,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 176 transitions. [2023-08-26 15:29:00,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38344226579520696 [2023-08-26 15:29:00,742 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 176 transitions. [2023-08-26 15:29:00,743 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 176 transitions. [2023-08-26 15:29:00,743 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:29:00,743 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 176 transitions. [2023-08-26 15:29:00,744 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 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 15:29:00,745 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 153.0) internal successors, (612), 4 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:29:00,745 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 153.0) internal successors, (612), 4 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:29:00,745 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 36 flow. Second operand 3 states and 176 transitions. [2023-08-26 15:29:00,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 16 transitions, 66 flow [2023-08-26 15:29:00,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 16 transitions, 66 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 15:29:00,746 INFO L231 Difference]: Finished difference. Result has 22 places, 16 transitions, 36 flow [2023-08-26 15:29:00,746 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=153, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=36, PETRI_PLACES=22, PETRI_TRANSITIONS=16} [2023-08-26 15:29:00,747 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, -5 predicate places. [2023-08-26 15:29:00,747 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 16 transitions, 36 flow [2023-08-26 15:29:00,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:29:00,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:29:00,748 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 15:29:00,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 15:29:00,748 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-26 15:29:00,748 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:29:00,748 INFO L85 PathProgramCache]: Analyzing trace with hash 276641, now seen corresponding path program 1 times [2023-08-26 15:29:00,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:29:00,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177249418] [2023-08-26 15:29:00,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:29:00,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:29:00,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:29:00,842 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 15:29:00,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:29:00,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177249418] [2023-08-26 15:29:00,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177249418] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:29:00,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:29:00,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 15:29:00,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530287564] [2023-08-26 15:29:00,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:29:00,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 15:29:00,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:29:00,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 15:29:00,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 15:29:00,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 153 [2023-08-26 15:29:00,846 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 16 transitions, 36 flow. Second operand has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:29:00,846 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:29:00,846 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 153 [2023-08-26 15:29:00,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:29:00,875 INFO L124 PetriNetUnfolderBase]: 36/87 cut-off events. [2023-08-26 15:29:00,875 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 15:29:00,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 181 conditions, 87 events. 36/87 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 252 event pairs, 36 based on Foata normal form. 0/67 useless extension candidates. Maximal degree in co-relation 177. Up to 87 conditions per place. [2023-08-26 15:29:00,876 INFO L140 encePairwiseOnDemand]: 151/153 looper letters, 12 selfloop transitions, 1 changer transitions 2/15 dead transitions. [2023-08-26 15:29:00,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 15 transitions, 64 flow [2023-08-26 15:29:00,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 15:29:00,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 15:29:00,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 181 transitions. [2023-08-26 15:29:00,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39433551198257083 [2023-08-26 15:29:00,882 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 181 transitions. [2023-08-26 15:29:00,882 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 181 transitions. [2023-08-26 15:29:00,882 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:29:00,883 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 181 transitions. [2023-08-26 15:29:00,883 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 60.333333333333336) internal successors, (181), 3 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:29:00,885 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 153.0) internal successors, (612), 4 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:29:00,886 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 153.0) internal successors, (612), 4 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:29:00,886 INFO L175 Difference]: Start difference. First operand has 22 places, 16 transitions, 36 flow. Second operand 3 states and 181 transitions. [2023-08-26 15:29:00,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 15 transitions, 64 flow [2023-08-26 15:29:00,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 15 transitions, 63 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 15:29:00,887 INFO L231 Difference]: Finished difference. Result has 22 places, 13 transitions, 31 flow [2023-08-26 15:29:00,887 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=153, PETRI_DIFFERENCE_MINUEND_FLOW=33, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=31, PETRI_PLACES=22, PETRI_TRANSITIONS=13} [2023-08-26 15:29:00,888 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, -5 predicate places. [2023-08-26 15:29:00,891 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 13 transitions, 31 flow [2023-08-26 15:29:00,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:29:00,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:29:00,892 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 15:29:00,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 15:29:00,892 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-26 15:29:00,893 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:29:00,893 INFO L85 PathProgramCache]: Analyzing trace with hash 276634, now seen corresponding path program 1 times [2023-08-26 15:29:00,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:29:00,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995745864] [2023-08-26 15:29:00,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:29:00,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:29:00,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:29:00,955 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 15:29:00,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:29:00,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995745864] [2023-08-26 15:29:00,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995745864] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:29:00,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:29:00,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 15:29:00,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413779996] [2023-08-26 15:29:00,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:29:00,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 15:29:00,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:29:00,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 15:29:00,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 15:29:00,958 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 153 [2023-08-26 15:29:00,958 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 13 transitions, 31 flow. Second operand has 3 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:29:00,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:29:00,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 153 [2023-08-26 15:29:00,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:29:00,981 INFO L124 PetriNetUnfolderBase]: 24/60 cut-off events. [2023-08-26 15:29:00,981 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 15:29:00,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128 conditions, 60 events. 24/60 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 147 event pairs, 24 based on Foata normal form. 0/50 useless extension candidates. Maximal degree in co-relation 124. Up to 60 conditions per place. [2023-08-26 15:29:00,982 INFO L140 encePairwiseOnDemand]: 151/153 looper letters, 11 selfloop transitions, 1 changer transitions 0/12 dead transitions. [2023-08-26 15:29:00,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 12 transitions, 53 flow [2023-08-26 15:29:00,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 15:29:00,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 15:29:00,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 172 transitions. [2023-08-26 15:29:00,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3747276688453159 [2023-08-26 15:29:00,983 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 172 transitions. [2023-08-26 15:29:00,983 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 172 transitions. [2023-08-26 15:29:00,984 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:29:00,984 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 172 transitions. [2023-08-26 15:29:00,984 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:29:00,985 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 153.0) internal successors, (612), 4 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:29:00,985 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 153.0) internal successors, (612), 4 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:29:00,986 INFO L175 Difference]: Start difference. First operand has 22 places, 13 transitions, 31 flow. Second operand 3 states and 172 transitions. [2023-08-26 15:29:00,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 12 transitions, 53 flow [2023-08-26 15:29:00,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 12 transitions, 52 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 15:29:00,986 INFO L231 Difference]: Finished difference. Result has 20 places, 12 transitions, 30 flow [2023-08-26 15:29:00,986 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=153, PETRI_DIFFERENCE_MINUEND_FLOW=28, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=12, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=30, PETRI_PLACES=20, PETRI_TRANSITIONS=12} [2023-08-26 15:29:00,987 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, -7 predicate places. [2023-08-26 15:29:00,987 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 12 transitions, 30 flow [2023-08-26 15:29:00,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:29:00,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:29:00,988 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 15:29:00,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 15:29:00,988 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-26 15:29:00,988 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:29:00,988 INFO L85 PathProgramCache]: Analyzing trace with hash 276632, now seen corresponding path program 1 times [2023-08-26 15:29:00,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:29:00,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135702411] [2023-08-26 15:29:00,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:29:00,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:29:00,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:29:01,074 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 15:29:01,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:29:01,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135702411] [2023-08-26 15:29:01,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135702411] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:29:01,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:29:01,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 15:29:01,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071697365] [2023-08-26 15:29:01,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:29:01,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 15:29:01,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:29:01,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 15:29:01,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 15:29:01,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 153 [2023-08-26 15:29:01,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 12 transitions, 30 flow. Second operand has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:29:01,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:29:01,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 153 [2023-08-26 15:29:01,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:29:01,104 INFO L124 PetriNetUnfolderBase]: 20/51 cut-off events. [2023-08-26 15:29:01,105 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 15:29:01,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111 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 107. Up to 51 conditions per place. [2023-08-26 15:29:01,105 INFO L140 encePairwiseOnDemand]: 151/153 looper letters, 10 selfloop transitions, 1 changer transitions 0/11 dead transitions. [2023-08-26 15:29:01,105 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 11 transitions, 50 flow [2023-08-26 15:29:01,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 15:29:01,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 15:29:01,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 177 transitions. [2023-08-26 15:29:01,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38562091503267976 [2023-08-26 15:29:01,107 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 177 transitions. [2023-08-26 15:29:01,107 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 177 transitions. [2023-08-26 15:29:01,107 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:29:01,107 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 177 transitions. [2023-08-26 15:29:01,108 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 59.0) internal successors, (177), 3 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:29:01,109 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 153.0) internal successors, (612), 4 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:29:01,109 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 153.0) internal successors, (612), 4 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:29:01,109 INFO L175 Difference]: Start difference. First operand has 20 places, 12 transitions, 30 flow. Second operand 3 states and 177 transitions. [2023-08-26 15:29:01,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 11 transitions, 50 flow [2023-08-26 15:29:01,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 11 transitions, 49 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 15:29:01,110 INFO L231 Difference]: Finished difference. Result has 20 places, 11 transitions, 29 flow [2023-08-26 15:29:01,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=153, PETRI_DIFFERENCE_MINUEND_FLOW=27, PETRI_DIFFERENCE_MINUEND_PLACES=18, 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=29, PETRI_PLACES=20, PETRI_TRANSITIONS=11} [2023-08-26 15:29:01,111 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, -7 predicate places. [2023-08-26 15:29:01,111 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 11 transitions, 29 flow [2023-08-26 15:29:01,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:29:01,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:29:01,111 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-26 15:29:01,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 15:29:01,111 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-26 15:29:01,112 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:29:01,112 INFO L85 PathProgramCache]: Analyzing trace with hash -348520265, now seen corresponding path program 1 times [2023-08-26 15:29:01,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:29:01,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69235846] [2023-08-26 15:29:01,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:29:01,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:29:01,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:29:01,146 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 15:29:01,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:29:01,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69235846] [2023-08-26 15:29:01,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69235846] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:29:01,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:29:01,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 15:29:01,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514449151] [2023-08-26 15:29:01,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:29:01,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 15:29:01,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:29:01,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 15:29:01,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 15:29:01,149 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 153 [2023-08-26 15:29:01,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 11 transitions, 29 flow. Second operand has 3 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:29:01,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:29:01,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 153 [2023-08-26 15:29:01,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:29:01,166 INFO L124 PetriNetUnfolderBase]: 16/42 cut-off events. [2023-08-26 15:29:01,167 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 15:29:01,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94 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 90. Up to 42 conditions per place. [2023-08-26 15:29:01,167 INFO L140 encePairwiseOnDemand]: 151/153 looper letters, 9 selfloop transitions, 1 changer transitions 0/10 dead transitions. [2023-08-26 15:29:01,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 10 transitions, 47 flow [2023-08-26 15:29:01,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 15:29:01,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 15:29:01,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 167 transitions. [2023-08-26 15:29:01,170 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3638344226579521 [2023-08-26 15:29:01,170 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 167 transitions. [2023-08-26 15:29:01,170 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 167 transitions. [2023-08-26 15:29:01,170 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:29:01,170 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 167 transitions. [2023-08-26 15:29:01,171 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:29:01,171 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 153.0) internal successors, (612), 4 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:29:01,172 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 153.0) internal successors, (612), 4 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:29:01,172 INFO L175 Difference]: Start difference. First operand has 20 places, 11 transitions, 29 flow. Second operand 3 states and 167 transitions. [2023-08-26 15:29:01,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 10 transitions, 47 flow [2023-08-26 15:29:01,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 10 transitions, 46 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 15:29:01,173 INFO L231 Difference]: Finished difference. Result has 20 places, 10 transitions, 28 flow [2023-08-26 15:29:01,173 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=153, PETRI_DIFFERENCE_MINUEND_FLOW=26, PETRI_DIFFERENCE_MINUEND_PLACES=18, 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=28, PETRI_PLACES=20, PETRI_TRANSITIONS=10} [2023-08-26 15:29:01,173 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, -7 predicate places. [2023-08-26 15:29:01,173 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 10 transitions, 28 flow [2023-08-26 15:29:01,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:29:01,174 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:29:01,174 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-26 15:29:01,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 15:29:01,174 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-26 15:29:01,174 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:29:01,175 INFO L85 PathProgramCache]: Analyzing trace with hash -348520264, now seen corresponding path program 1 times [2023-08-26 15:29:01,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:29:01,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044019665] [2023-08-26 15:29:01,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:29:01,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:29:01,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:29:01,241 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 15:29:01,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:29:01,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044019665] [2023-08-26 15:29:01,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044019665] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:29:01,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:29:01,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 15:29:01,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817253292] [2023-08-26 15:29:01,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:29:01,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 15:29:01,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:29:01,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 15:29:01,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 15:29:01,244 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 153 [2023-08-26 15:29:01,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 10 transitions, 28 flow. Second operand has 3 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:29:01,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:29:01,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 153 [2023-08-26 15:29:01,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:29:01,260 INFO L124 PetriNetUnfolderBase]: 12/33 cut-off events. [2023-08-26 15:29:01,260 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 15:29:01,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77 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 73. Up to 33 conditions per place. [2023-08-26 15:29:01,261 INFO L140 encePairwiseOnDemand]: 151/153 looper letters, 0 selfloop transitions, 0 changer transitions 9/9 dead transitions. [2023-08-26 15:29:01,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 9 transitions, 44 flow [2023-08-26 15:29:01,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 15:29:01,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 15:29:01,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 169 transitions. [2023-08-26 15:29:01,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3681917211328976 [2023-08-26 15:29:01,262 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 169 transitions. [2023-08-26 15:29:01,262 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 169 transitions. [2023-08-26 15:29:01,262 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:29:01,262 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 169 transitions. [2023-08-26 15:29:01,263 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:29:01,264 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 153.0) internal successors, (612), 4 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:29:01,265 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 153.0) internal successors, (612), 4 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:29:01,265 INFO L175 Difference]: Start difference. First operand has 20 places, 10 transitions, 28 flow. Second operand 3 states and 169 transitions. [2023-08-26 15:29:01,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 9 transitions, 44 flow [2023-08-26 15:29:01,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 9 transitions, 43 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 15:29:01,265 INFO L231 Difference]: Finished difference. Result has 20 places, 0 transitions, 0 flow [2023-08-26 15:29:01,267 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=153, PETRI_DIFFERENCE_MINUEND_FLOW=25, PETRI_DIFFERENCE_MINUEND_PLACES=18, 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=20, PETRI_TRANSITIONS=0} [2023-08-26 15:29:01,269 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, -7 predicate places. [2023-08-26 15:29:01,269 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 0 transitions, 0 flow [2023-08-26 15:29:01,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:29:01,271 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 17 remaining) [2023-08-26 15:29:01,272 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 17 remaining) [2023-08-26 15:29:01,273 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 17 remaining) [2023-08-26 15:29:01,273 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 17 remaining) [2023-08-26 15:29:01,277 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 17 remaining) [2023-08-26 15:29:01,277 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 17 remaining) [2023-08-26 15:29:01,277 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 17 remaining) [2023-08-26 15:29:01,277 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 17 remaining) [2023-08-26 15:29:01,278 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 17 remaining) [2023-08-26 15:29:01,278 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 17 remaining) [2023-08-26 15:29:01,278 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 17 remaining) [2023-08-26 15:29:01,278 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 17 remaining) [2023-08-26 15:29:01,278 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 17 remaining) [2023-08-26 15:29:01,278 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 17 remaining) [2023-08-26 15:29:01,278 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 17 remaining) [2023-08-26 15:29:01,278 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 17 remaining) [2023-08-26 15:29:01,279 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 17 remaining) [2023-08-26 15:29:01,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 15:29:01,279 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:29:01,284 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-26 15:29:01,284 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-26 15:29:01,293 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 03:29:01 BasicIcfg [2023-08-26 15:29:01,293 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-26 15:29:01,294 INFO L158 Benchmark]: Toolchain (without parser) took 5645.76ms. Allocated memory was 379.6MB in the beginning and 457.2MB in the end (delta: 77.6MB). Free memory was 353.2MB in the beginning and 302.6MB in the end (delta: 50.7MB). Peak memory consumption was 130.0MB. Max. memory is 16.0GB. [2023-08-26 15:29:01,294 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 379.6MB. Free memory is still 357.0MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 15:29:01,294 INFO L158 Benchmark]: CACSL2BoogieTranslator took 584.54ms. Allocated memory is still 379.6MB. Free memory was 352.9MB in the beginning and 326.0MB in the end (delta: 26.9MB). Peak memory consumption was 27.3MB. Max. memory is 16.0GB. [2023-08-26 15:29:01,295 INFO L158 Benchmark]: Boogie Procedure Inliner took 52.06ms. Allocated memory is still 379.6MB. Free memory was 326.0MB in the beginning and 323.7MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 15:29:01,295 INFO L158 Benchmark]: Boogie Preprocessor took 20.95ms. Allocated memory is still 379.6MB. Free memory was 323.7MB in the beginning and 322.3MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 15:29:01,295 INFO L158 Benchmark]: RCFGBuilder took 392.61ms. Allocated memory is still 379.6MB. Free memory was 321.7MB in the beginning and 306.2MB in the end (delta: 15.5MB). Peak memory consumption was 16.8MB. Max. memory is 16.0GB. [2023-08-26 15:29:01,295 INFO L158 Benchmark]: TraceAbstraction took 4590.95ms. Allocated memory was 379.6MB in the beginning and 457.2MB in the end (delta: 77.6MB). Free memory was 305.6MB in the beginning and 302.6MB in the end (delta: 3.0MB). Peak memory consumption was 81.8MB. Max. memory is 16.0GB. [2023-08-26 15:29:01,298 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 379.6MB. Free memory is still 357.0MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 584.54ms. Allocated memory is still 379.6MB. Free memory was 352.9MB in the beginning and 326.0MB in the end (delta: 26.9MB). Peak memory consumption was 27.3MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 52.06ms. Allocated memory is still 379.6MB. Free memory was 326.0MB in the beginning and 323.7MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 20.95ms. Allocated memory is still 379.6MB. Free memory was 323.7MB in the beginning and 322.3MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 392.61ms. Allocated memory is still 379.6MB. Free memory was 321.7MB in the beginning and 306.2MB in the end (delta: 15.5MB). Peak memory consumption was 16.8MB. Max. memory is 16.0GB. * TraceAbstraction took 4590.95ms. Allocated memory was 379.6MB in the beginning and 457.2MB in the end (delta: 77.6MB). Free memory was 305.6MB in the beginning and 302.6MB in the end (delta: 3.0MB). Peak memory consumption was 81.8MB. 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: 3.3s, 73 PlacesBefore, 27 PlacesAfterwards, 69 TransitionsBefore, 23 TransitionsAfterwards, 680 CoEnabledTransitionPairs, 7 FixpointIterations, 34 TrivialSequentialCompositions, 42 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 76 TotalNumberOfCompositions, 1930 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1241, independent: 1108, independent conditional: 0, independent unconditional: 1108, dependent: 133, dependent conditional: 0, dependent unconditional: 133, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 435, independent: 418, independent conditional: 0, independent unconditional: 418, dependent: 17, dependent conditional: 0, dependent unconditional: 17, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1241, independent: 690, independent conditional: 0, independent unconditional: 690, dependent: 116, dependent conditional: 0, dependent unconditional: 116, unknown: 435, unknown conditional: 0, unknown unconditional: 435] , Statistics on independence cache: Total cache size (in pairs): 37, Positive cache size: 29, Positive conditional cache size: 0, Positive unconditional cache size: 29, Negative cache size: 8, Negative conditional cache size: 0, Negative unconditional cache size: 8, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - 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, 97 locations, 17 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: 4.4s, OverallIterations: 7, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.4s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 55 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 55 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 0 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 88 IncrementalHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 0 mSolverCounterUnsat, 0 mSDtfsCounter, 88 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=49occurred in iteration=0, InterpolantAutomatonStates: 20, 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, 25 NumberOfCodeBlocks, 25 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 18 ConstructedInterpolants, 0 QuantifiedInterpolants, 146 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 7 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 12 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-26 15:29:01,315 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...