/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.pointer.base.address.is.valid.at.dereference ASSERTandASSUME --cacsl2boogietranslator.pointer.to.allocated.memory.at.dereference ASSERTandASSUME --cacsl2boogietranslator.check.array.bounds.for.arrays.that.are.off.heap ASSERTandASSUME --cacsl2boogietranslator.check.if.freed.pointer.was.valid true --cacsl2boogietranslator.adapt.memory.model.on.pointer.casts.if.necessary true -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_09-ptrmunge_racing.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 12:34:10,330 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 12:34:10,386 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 12:34:10,388 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 12:34:10,389 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 12:34:10,403 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 12:34:10,403 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 12:34:10,404 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 12:34:10,404 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 12:34:10,407 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 12:34:10,407 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 12:34:10,407 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 12:34:10,408 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 12:34:10,408 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 12:34:10,409 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 12:34:10,409 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 12:34:10,409 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 12:34:10,409 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 12:34:10,409 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 12:34:10,409 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 12:34:10,410 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 12:34:10,410 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 12:34:10,410 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 12:34:10,410 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 12:34:10,411 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 12:34:10,411 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 12:34:10,411 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 12:34:10,411 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 12:34:10,411 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 12:34:10,411 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 12:34:10,412 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 12:34:10,412 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 12:34:10,412 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 12:34:10,412 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 12:34:10,413 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 12:34:10,413 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 12:34:10,659 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 12:34:10,671 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 12:34:10,673 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 12:34:10,674 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 12:34:10,674 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 12:34:10,675 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_09-ptrmunge_racing.i [2023-08-26 12:34:11,556 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 12:34:11,772 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 12:34:11,772 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_09-ptrmunge_racing.i [2023-08-26 12:34:11,781 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/80172c994/e0436f213e7d4b90a5dfaa8e5b891231/FLAG3a5c0888a [2023-08-26 12:34:11,790 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/80172c994/e0436f213e7d4b90a5dfaa8e5b891231 [2023-08-26 12:34:11,791 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 12:34:11,792 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 12:34:11,793 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 12:34:11,793 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 12:34:11,795 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 12:34:11,795 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 12:34:11" (1/1) ... [2023-08-26 12:34:11,796 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4953d6c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:34:11, skipping insertion in model container [2023-08-26 12:34:11,796 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 12:34:11" (1/1) ... [2023-08-26 12:34:11,837 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 12:34:12,096 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 12:34:12,106 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 12:34:12,130 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-26 12:34:12,131 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-26 12:34:12,143 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 12:34:12,174 INFO L206 MainTranslator]: Completed translation [2023-08-26 12:34:12,175 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:34:12 WrapperNode [2023-08-26 12:34:12,176 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 12:34:12,176 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 12:34:12,177 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 12:34:12,177 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 12:34:12,182 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:34:12" (1/1) ... [2023-08-26 12:34:12,214 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:34:12" (1/1) ... [2023-08-26 12:34:12,242 INFO L138 Inliner]: procedures = 172, calls = 51, calls flagged for inlining = 6, calls inlined = 8, statements flattened = 228 [2023-08-26 12:34:12,242 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 12:34:12,243 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 12:34:12,243 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 12:34:12,243 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 12:34:12,249 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:34:12" (1/1) ... [2023-08-26 12:34:12,249 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:34:12" (1/1) ... [2023-08-26 12:34:12,263 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:34:12" (1/1) ... [2023-08-26 12:34:12,263 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:34:12" (1/1) ... [2023-08-26 12:34:12,268 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:34:12" (1/1) ... [2023-08-26 12:34:12,276 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:34:12" (1/1) ... [2023-08-26 12:34:12,279 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:34:12" (1/1) ... [2023-08-26 12:34:12,280 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:34:12" (1/1) ... [2023-08-26 12:34:12,282 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 12:34:12,282 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 12:34:12,283 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 12:34:12,283 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 12:34:12,283 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:34:12" (1/1) ... [2023-08-26 12:34:12,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 12:34:12,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 12:34:12,307 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 12:34:12,325 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 12:34:12,333 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-26 12:34:12,333 INFO L130 BoogieDeclarations]: Found specification of procedure t2_fun [2023-08-26 12:34:12,333 INFO L138 BoogieDeclarations]: Found implementation of procedure t2_fun [2023-08-26 12:34:12,333 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 12:34:12,333 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-26 12:34:12,333 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 12:34:12,333 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 12:34:12,333 INFO L130 BoogieDeclarations]: Found specification of procedure t1_fun [2023-08-26 12:34:12,334 INFO L138 BoogieDeclarations]: Found implementation of procedure t1_fun [2023-08-26 12:34:12,334 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 12:34:12,334 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 12:34:12,334 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 12:34:12,334 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 12:34:12,335 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 12:34:12,448 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 12:34:12,449 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 12:34:12,766 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 12:34:12,771 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 12:34:12,771 INFO L302 CfgBuilder]: Removed 24 assume(true) statements. [2023-08-26 12:34:12,772 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 12:34:12 BoogieIcfgContainer [2023-08-26 12:34:12,773 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 12:34:12,774 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 12:34:12,774 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 12:34:12,776 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 12:34:12,776 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 12:34:11" (1/3) ... [2023-08-26 12:34:12,777 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cac23dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 12:34:12, skipping insertion in model container [2023-08-26 12:34:12,777 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:34:12" (2/3) ... [2023-08-26 12:34:12,777 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cac23dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 12:34:12, skipping insertion in model container [2023-08-26 12:34:12,777 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 12:34:12" (3/3) ... [2023-08-26 12:34:12,778 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_09-ptrmunge_racing.i [2023-08-26 12:34:12,793 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 12:34:12,816 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 30 error locations. [2023-08-26 12:34:12,816 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 12:34:12,893 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-26 12:34:12,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 226 places, 255 transitions, 532 flow [2023-08-26 12:34:13,048 INFO L124 PetriNetUnfolderBase]: 61/464 cut-off events. [2023-08-26 12:34:13,048 INFO L125 PetriNetUnfolderBase]: For 8/10 co-relation queries the response was YES. [2023-08-26 12:34:13,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 484 conditions, 464 events. 61/464 cut-off events. For 8/10 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 2266 event pairs, 0 based on Foata normal form. 0/336 useless extension candidates. Maximal degree in co-relation 252. Up to 8 conditions per place. [2023-08-26 12:34:13,064 INFO L82 GeneralOperation]: Start removeDead. Operand has 226 places, 255 transitions, 532 flow [2023-08-26 12:34:13,074 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 226 places, 255 transitions, 532 flow [2023-08-26 12:34:13,076 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 12:34:13,085 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 226 places, 255 transitions, 532 flow [2023-08-26 12:34:13,088 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 226 places, 255 transitions, 532 flow [2023-08-26 12:34:13,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 226 places, 255 transitions, 532 flow [2023-08-26 12:34:13,130 INFO L124 PetriNetUnfolderBase]: 61/464 cut-off events. [2023-08-26 12:34:13,131 INFO L125 PetriNetUnfolderBase]: For 8/10 co-relation queries the response was YES. [2023-08-26 12:34:13,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 484 conditions, 464 events. 61/464 cut-off events. For 8/10 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 2266 event pairs, 0 based on Foata normal form. 0/336 useless extension candidates. Maximal degree in co-relation 252. Up to 8 conditions per place. [2023-08-26 12:34:13,146 INFO L119 LiptonReduction]: Number of co-enabled transitions 28350 [2023-08-26 12:34:17,364 INFO L134 LiptonReduction]: Checked pairs total: 67023 [2023-08-26 12:34:17,365 INFO L136 LiptonReduction]: Total number of compositions: 219 [2023-08-26 12:34:17,373 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 12:34:17,377 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;@3df7a518, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 12:34:17,377 INFO L358 AbstractCegarLoop]: Starting to check reachability of 54 error locations. [2023-08-26 12:34:17,379 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 12:34:17,379 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2023-08-26 12:34:17,379 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 12:34:17,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:34:17,379 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 12:34:17,379 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2023-08-26 12:34:17,382 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:34:17,382 INFO L85 PathProgramCache]: Analyzing trace with hash 33354, now seen corresponding path program 1 times [2023-08-26 12:34:17,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:34:17,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930450837] [2023-08-26 12:34:17,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:34:17,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:34:17,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:34:17,639 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 12:34:17,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:34:17,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930450837] [2023-08-26 12:34:17,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930450837] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:34:17,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:34:17,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 12:34:17,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213878397] [2023-08-26 12:34:17,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:34:17,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:34:17,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:34:17,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:34:17,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:34:17,669 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 474 [2023-08-26 12:34:17,674 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 108 transitions, 238 flow. Second operand has 3 states, 3 states have (on average 172.66666666666666) internal successors, (518), 3 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:34:17,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:34:17,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 474 [2023-08-26 12:34:17,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:34:19,150 INFO L124 PetriNetUnfolderBase]: 15143/24948 cut-off events. [2023-08-26 12:34:19,151 INFO L125 PetriNetUnfolderBase]: For 176/176 co-relation queries the response was YES. [2023-08-26 12:34:19,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48277 conditions, 24948 events. 15143/24948 cut-off events. For 176/176 co-relation queries the response was YES. Maximal size of possible extension queue 1204. Compared 201343 event pairs, 7014 based on Foata normal form. 2118/16010 useless extension candidates. Maximal degree in co-relation 47006. Up to 23112 conditions per place. [2023-08-26 12:34:19,261 INFO L140 encePairwiseOnDemand]: 448/474 looper letters, 93 selfloop transitions, 2 changer transitions 0/110 dead transitions. [2023-08-26 12:34:19,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 110 transitions, 432 flow [2023-08-26 12:34:19,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:34:19,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:34:19,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 645 transitions. [2023-08-26 12:34:19,275 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45358649789029537 [2023-08-26 12:34:19,276 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 645 transitions. [2023-08-26 12:34:19,276 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 645 transitions. [2023-08-26 12:34:19,278 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:34:19,280 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 645 transitions. [2023-08-26 12:34:19,284 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 215.0) internal successors, (645), 3 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:34:19,289 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 474.0) internal successors, (1896), 4 states have internal predecessors, (1896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:34:19,290 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 474.0) internal successors, (1896), 4 states have internal predecessors, (1896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:34:19,292 INFO L175 Difference]: Start difference. First operand has 87 places, 108 transitions, 238 flow. Second operand 3 states and 645 transitions. [2023-08-26 12:34:19,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 110 transitions, 432 flow [2023-08-26 12:34:19,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 110 transitions, 432 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 12:34:19,299 INFO L231 Difference]: Finished difference. Result has 88 places, 86 transitions, 204 flow [2023-08-26 12:34:19,300 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=474, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=204, PETRI_PLACES=88, PETRI_TRANSITIONS=86} [2023-08-26 12:34:19,303 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, 1 predicate places. [2023-08-26 12:34:19,303 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 86 transitions, 204 flow [2023-08-26 12:34:19,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 172.66666666666666) internal successors, (518), 3 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:34:19,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:34:19,303 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 12:34:19,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 12:34:19,304 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2023-08-26 12:34:19,310 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:34:19,310 INFO L85 PathProgramCache]: Analyzing trace with hash 33356, now seen corresponding path program 1 times [2023-08-26 12:34:19,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:34:19,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451546569] [2023-08-26 12:34:19,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:34:19,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:34:19,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:34:19,371 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 12:34:19,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:34:19,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451546569] [2023-08-26 12:34:19,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451546569] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:34:19,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:34:19,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 12:34:19,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500771452] [2023-08-26 12:34:19,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:34:19,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:34:19,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:34:19,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:34:19,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:34:19,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 474 [2023-08-26 12:34:19,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 86 transitions, 204 flow. Second operand has 3 states, 3 states have (on average 176.66666666666666) internal successors, (530), 3 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:34:19,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:34:19,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 474 [2023-08-26 12:34:19,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:34:20,595 INFO L124 PetriNetUnfolderBase]: 14852/23753 cut-off events. [2023-08-26 12:34:20,595 INFO L125 PetriNetUnfolderBase]: For 239/239 co-relation queries the response was YES. [2023-08-26 12:34:20,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46491 conditions, 23753 events. 14852/23753 cut-off events. For 239/239 co-relation queries the response was YES. Maximal size of possible extension queue 1173. Compared 182791 event pairs, 12188 based on Foata normal form. 0/13043 useless extension candidates. Maximal degree in co-relation 45316. Up to 19217 conditions per place. [2023-08-26 12:34:20,736 INFO L140 encePairwiseOnDemand]: 470/474 looper letters, 112 selfloop transitions, 2 changer transitions 0/128 dead transitions. [2023-08-26 12:34:20,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 128 transitions, 516 flow [2023-08-26 12:34:20,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:34:20,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:34:20,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 644 transitions. [2023-08-26 12:34:20,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45288326300984527 [2023-08-26 12:34:20,739 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 644 transitions. [2023-08-26 12:34:20,739 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 644 transitions. [2023-08-26 12:34:20,739 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:34:20,740 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 644 transitions. [2023-08-26 12:34:20,741 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 214.66666666666666) internal successors, (644), 3 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:34:20,742 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 474.0) internal successors, (1896), 4 states have internal predecessors, (1896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:34:20,743 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 474.0) internal successors, (1896), 4 states have internal predecessors, (1896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:34:20,743 INFO L175 Difference]: Start difference. First operand has 88 places, 86 transitions, 204 flow. Second operand 3 states and 644 transitions. [2023-08-26 12:34:20,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 128 transitions, 516 flow [2023-08-26 12:34:20,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 128 transitions, 512 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 12:34:20,749 INFO L231 Difference]: Finished difference. Result has 86 places, 84 transitions, 200 flow [2023-08-26 12:34:20,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=474, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=200, PETRI_PLACES=86, PETRI_TRANSITIONS=84} [2023-08-26 12:34:20,749 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, -1 predicate places. [2023-08-26 12:34:20,750 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 84 transitions, 200 flow [2023-08-26 12:34:20,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 176.66666666666666) internal successors, (530), 3 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:34:20,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:34:20,752 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 12:34:20,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 12:34:20,753 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2023-08-26 12:34:20,755 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:34:20,755 INFO L85 PathProgramCache]: Analyzing trace with hash 994470295, now seen corresponding path program 1 times [2023-08-26 12:34:20,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:34:20,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595707503] [2023-08-26 12:34:20,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:34:20,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:34:20,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:34:20,874 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:34:20,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:34:20,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595707503] [2023-08-26 12:34:20,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595707503] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 12:34:20,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323493257] [2023-08-26 12:34:20,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:34:20,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 12:34:20,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 12:34:20,878 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 12:34:20,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-26 12:34:20,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:34:20,953 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-26 12:34:20,956 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 12:34:21,000 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-26 12:34:21,040 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:34:21,040 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 12:34:21,073 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:34:21,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323493257] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 12:34:21,073 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 12:34:21,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-08-26 12:34:21,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509505887] [2023-08-26 12:34:21,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 12:34:21,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-26 12:34:21,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:34:21,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-26 12:34:21,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-08-26 12:34:21,076 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 474 [2023-08-26 12:34:21,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 84 transitions, 200 flow. Second operand has 8 states, 8 states have (on average 173.875) internal successors, (1391), 8 states have internal predecessors, (1391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:34:21,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:34:21,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 474 [2023-08-26 12:34:21,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:34:21,154 INFO L124 PetriNetUnfolderBase]: 47/133 cut-off events. [2023-08-26 12:34:21,154 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-26 12:34:21,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 287 conditions, 133 events. 47/133 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 483 event pairs, 19 based on Foata normal form. 23/125 useless extension candidates. Maximal degree in co-relation 281. Up to 90 conditions per place. [2023-08-26 12:34:21,155 INFO L140 encePairwiseOnDemand]: 470/474 looper letters, 47 selfloop transitions, 2 changer transitions 0/56 dead transitions. [2023-08-26 12:34:21,155 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 56 transitions, 219 flow [2023-08-26 12:34:21,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 12:34:21,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 12:34:21,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 739 transitions. [2023-08-26 12:34:21,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38976793248945146 [2023-08-26 12:34:21,157 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 739 transitions. [2023-08-26 12:34:21,157 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 739 transitions. [2023-08-26 12:34:21,158 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:34:21,158 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 739 transitions. [2023-08-26 12:34:21,159 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 184.75) internal successors, (739), 4 states have internal predecessors, (739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:34:21,161 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 474.0) internal successors, (2370), 5 states have internal predecessors, (2370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:34:21,162 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 474.0) internal successors, (2370), 5 states have internal predecessors, (2370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:34:21,162 INFO L175 Difference]: Start difference. First operand has 86 places, 84 transitions, 200 flow. Second operand 4 states and 739 transitions. [2023-08-26 12:34:21,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 56 transitions, 219 flow [2023-08-26 12:34:21,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 56 transitions, 216 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 12:34:21,163 INFO L231 Difference]: Finished difference. Result has 40 places, 33 transitions, 76 flow [2023-08-26 12:34:21,163 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=474, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=76, PETRI_PLACES=40, PETRI_TRANSITIONS=33} [2023-08-26 12:34:21,164 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, -47 predicate places. [2023-08-26 12:34:21,164 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 33 transitions, 76 flow [2023-08-26 12:34:21,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 173.875) internal successors, (1391), 8 states have internal predecessors, (1391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:34:21,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:34:21,165 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-26 12:34:21,170 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-26 12:34:21,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 12:34:21,370 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2023-08-26 12:34:21,370 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:34:21,370 INFO L85 PathProgramCache]: Analyzing trace with hash 763808894, now seen corresponding path program 1 times [2023-08-26 12:34:21,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:34:21,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795647045] [2023-08-26 12:34:21,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:34:21,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:34:21,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 12:34:21,385 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 12:34:21,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 12:34:21,406 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 12:34:21,406 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 12:34:21,406 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (53 of 54 remaining) [2023-08-26 12:34:21,407 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (52 of 54 remaining) [2023-08-26 12:34:21,408 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (51 of 54 remaining) [2023-08-26 12:34:21,408 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (50 of 54 remaining) [2023-08-26 12:34:21,408 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (49 of 54 remaining) [2023-08-26 12:34:21,408 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 54 remaining) [2023-08-26 12:34:21,408 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 54 remaining) [2023-08-26 12:34:21,408 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 54 remaining) [2023-08-26 12:34:21,408 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 54 remaining) [2023-08-26 12:34:21,408 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 54 remaining) [2023-08-26 12:34:21,408 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 54 remaining) [2023-08-26 12:34:21,408 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr10ASSERT_VIOLATIONASSERT (42 of 54 remaining) [2023-08-26 12:34:21,409 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 54 remaining) [2023-08-26 12:34:21,409 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 54 remaining) [2023-08-26 12:34:21,409 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 54 remaining) [2023-08-26 12:34:21,409 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 54 remaining) [2023-08-26 12:34:21,409 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 54 remaining) [2023-08-26 12:34:21,409 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 54 remaining) [2023-08-26 12:34:21,409 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 54 remaining) [2023-08-26 12:34:21,409 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 54 remaining) [2023-08-26 12:34:21,409 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (33 of 54 remaining) [2023-08-26 12:34:21,409 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 54 remaining) [2023-08-26 12:34:21,410 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 54 remaining) [2023-08-26 12:34:21,410 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 54 remaining) [2023-08-26 12:34:21,410 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 54 remaining) [2023-08-26 12:34:21,410 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 54 remaining) [2023-08-26 12:34:21,410 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 54 remaining) [2023-08-26 12:34:21,410 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 54 remaining) [2023-08-26 12:34:21,410 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 54 remaining) [2023-08-26 12:34:21,410 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 54 remaining) [2023-08-26 12:34:21,410 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 54 remaining) [2023-08-26 12:34:21,410 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr10ASSERT_VIOLATIONASSERT (22 of 54 remaining) [2023-08-26 12:34:21,410 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 54 remaining) [2023-08-26 12:34:21,411 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 54 remaining) [2023-08-26 12:34:21,411 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 54 remaining) [2023-08-26 12:34:21,411 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 54 remaining) [2023-08-26 12:34:21,411 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 54 remaining) [2023-08-26 12:34:21,411 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 54 remaining) [2023-08-26 12:34:21,411 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 54 remaining) [2023-08-26 12:34:21,411 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 54 remaining) [2023-08-26 12:34:21,411 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 54 remaining) [2023-08-26 12:34:21,411 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 54 remaining) [2023-08-26 12:34:21,411 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr10ASSERT_VIOLATIONASSERT (11 of 54 remaining) [2023-08-26 12:34:21,411 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 54 remaining) [2023-08-26 12:34:21,411 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 54 remaining) [2023-08-26 12:34:21,412 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 54 remaining) [2023-08-26 12:34:21,412 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 54 remaining) [2023-08-26 12:34:21,412 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 54 remaining) [2023-08-26 12:34:21,412 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 54 remaining) [2023-08-26 12:34:21,412 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 54 remaining) [2023-08-26 12:34:21,412 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 54 remaining) [2023-08-26 12:34:21,412 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 54 remaining) [2023-08-26 12:34:21,412 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 54 remaining) [2023-08-26 12:34:21,412 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr10ASSERT_VIOLATIONASSERT (0 of 54 remaining) [2023-08-26 12:34:21,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 12:34:21,413 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-26 12:34:21,416 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 12:34:21,416 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-26 12:34:21,468 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-26 12:34:21,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 356 places, 411 transitions, 870 flow [2023-08-26 12:34:21,622 INFO L124 PetriNetUnfolderBase]: 205/1347 cut-off events. [2023-08-26 12:34:21,622 INFO L125 PetriNetUnfolderBase]: For 72/78 co-relation queries the response was YES. [2023-08-26 12:34:21,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1444 conditions, 1347 events. 205/1347 cut-off events. For 72/78 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 8953 event pairs, 2 based on Foata normal form. 0/979 useless extension candidates. Maximal degree in co-relation 813. Up to 32 conditions per place. [2023-08-26 12:34:21,637 INFO L82 GeneralOperation]: Start removeDead. Operand has 356 places, 411 transitions, 870 flow [2023-08-26 12:34:21,652 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 356 places, 411 transitions, 870 flow [2023-08-26 12:34:21,652 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 12:34:21,653 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 356 places, 411 transitions, 870 flow [2023-08-26 12:34:21,653 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 356 places, 411 transitions, 870 flow [2023-08-26 12:34:21,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 356 places, 411 transitions, 870 flow [2023-08-26 12:34:21,798 INFO L124 PetriNetUnfolderBase]: 205/1347 cut-off events. [2023-08-26 12:34:21,798 INFO L125 PetriNetUnfolderBase]: For 72/78 co-relation queries the response was YES. [2023-08-26 12:34:21,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1444 conditions, 1347 events. 205/1347 cut-off events. For 72/78 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 8953 event pairs, 2 based on Foata normal form. 0/979 useless extension candidates. Maximal degree in co-relation 813. Up to 32 conditions per place. [2023-08-26 12:34:21,918 INFO L119 LiptonReduction]: Number of co-enabled transitions 104700 [2023-08-26 12:34:27,239 INFO L134 LiptonReduction]: Checked pairs total: 253927 [2023-08-26 12:34:27,239 INFO L136 LiptonReduction]: Total number of compositions: 330 [2023-08-26 12:34:27,242 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 12:34:27,244 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;@3df7a518, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 12:34:27,244 INFO L358 AbstractCegarLoop]: Starting to check reachability of 76 error locations. [2023-08-26 12:34:27,245 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 12:34:27,245 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-08-26 12:34:27,245 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 12:34:27,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:34:27,246 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 12:34:27,246 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 73 more)] === [2023-08-26 12:34:27,246 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:34:27,246 INFO L85 PathProgramCache]: Analyzing trace with hash 61943, now seen corresponding path program 1 times [2023-08-26 12:34:27,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:34:27,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795879178] [2023-08-26 12:34:27,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:34:27,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:34:27,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:34:27,294 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 12:34:27,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:34:27,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795879178] [2023-08-26 12:34:27,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795879178] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:34:27,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:34:27,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 12:34:27,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906090308] [2023-08-26 12:34:27,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:34:27,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:34:27,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:34:27,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:34:27,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:34:27,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 276 out of 741 [2023-08-26 12:34:27,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 193 transitions, 434 flow. Second operand has 3 states, 3 states have (on average 276.6666666666667) internal successors, (830), 3 states have internal predecessors, (830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:34:27,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:34:27,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 276 of 741 [2023-08-26 12:34:27,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand