/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.order.of.the.error.locations.to.be.checked PROGRAM_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_83-list2_racing1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-24 13:01:40,963 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-24 13:01:41,048 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 [2023-08-24 13:01:41,053 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-24 13:01:41,054 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-24 13:01:41,085 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-24 13:01:41,086 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-24 13:01:41,086 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-24 13:01:41,087 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-24 13:01:41,090 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-24 13:01:41,091 INFO L153 SettingsManager]: * Use SBE=true [2023-08-24 13:01:41,091 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-24 13:01:41,091 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-24 13:01:41,092 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-24 13:01:41,093 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-24 13:01:41,093 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-24 13:01:41,093 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-24 13:01:41,093 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-24 13:01:41,094 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-24 13:01:41,094 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-24 13:01:41,094 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-24 13:01:41,095 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-24 13:01:41,095 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-24 13:01:41,096 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-24 13:01:41,096 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-24 13:01:41,096 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-24 13:01:41,096 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-24 13:01:41,096 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 13:01:41,097 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-24 13:01:41,097 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-24 13:01:41,098 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-24 13:01:41,098 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-24 13:01:41,098 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-24 13:01:41,098 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-24 13:01:41,098 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-24 13:01:41,099 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-24 13:01:41,394 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-24 13:01:41,414 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-24 13:01:41,416 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-24 13:01:41,418 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-24 13:01:41,419 INFO L274 PluginConnector]: CDTParser initialized [2023-08-24 13:01:41,420 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_83-list2_racing1.i [2023-08-24 13:01:42,640 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-24 13:01:42,916 INFO L384 CDTParser]: Found 1 translation units. [2023-08-24 13:01:42,916 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_83-list2_racing1.i [2023-08-24 13:01:42,935 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45d03b82e/82dd3c6c03224a919db4f50d437a4d5b/FLAGde7aab20e [2023-08-24 13:01:42,948 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45d03b82e/82dd3c6c03224a919db4f50d437a4d5b [2023-08-24 13:01:42,950 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-24 13:01:42,951 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-24 13:01:42,952 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-24 13:01:42,952 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-24 13:01:42,955 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-24 13:01:42,955 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 01:01:42" (1/1) ... [2023-08-24 13:01:42,956 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23e0f4ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 01:01:42, skipping insertion in model container [2023-08-24 13:01:42,956 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 01:01:42" (1/1) ... [2023-08-24 13:01:42,998 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-24 13:01:43,352 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_83-list2_racing1.i[47038,47051] [2023-08-24 13:01:43,400 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 13:01:43,416 INFO L201 MainTranslator]: Completed pre-run [2023-08-24 13:01:43,442 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [261] [2023-08-24 13:01:43,443 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [261] [2023-08-24 13:01:43,461 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_83-list2_racing1.i[47038,47051] [2023-08-24 13:01:43,484 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 13:01:43,562 INFO L206 MainTranslator]: Completed translation [2023-08-24 13:01:43,563 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 01:01:43 WrapperNode [2023-08-24 13:01:43,563 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-24 13:01:43,564 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-24 13:01:43,564 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-24 13:01:43,564 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-24 13:01:43,570 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 01:01:43" (1/1) ... [2023-08-24 13:01:43,602 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 01:01:43" (1/1) ... [2023-08-24 13:01:43,647 INFO L138 Inliner]: procedures = 279, calls = 86, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 350 [2023-08-24 13:01:43,647 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-24 13:01:43,648 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-24 13:01:43,648 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-24 13:01:43,648 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-24 13:01:43,657 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 01:01:43" (1/1) ... [2023-08-24 13:01:43,658 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 01:01:43" (1/1) ... [2023-08-24 13:01:43,674 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 01:01:43" (1/1) ... [2023-08-24 13:01:43,674 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 01:01:43" (1/1) ... [2023-08-24 13:01:43,684 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 01:01:43" (1/1) ... [2023-08-24 13:01:43,689 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 01:01:43" (1/1) ... [2023-08-24 13:01:43,692 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 01:01:43" (1/1) ... [2023-08-24 13:01:43,694 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 01:01:43" (1/1) ... [2023-08-24 13:01:43,697 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-24 13:01:43,698 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-24 13:01:43,698 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-24 13:01:43,698 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-24 13:01:43,699 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 01:01:43" (1/1) ... [2023-08-24 13:01:43,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 13:01:43,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:01:43,747 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) [2023-08-24 13:01:43,748 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 [2023-08-24 13:01:43,771 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-24 13:01:43,771 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-08-24 13:01:43,771 INFO L130 BoogieDeclarations]: Found specification of procedure t1_fun [2023-08-24 13:01:43,772 INFO L138 BoogieDeclarations]: Found implementation of procedure t1_fun [2023-08-24 13:01:43,772 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-24 13:01:43,772 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-24 13:01:43,772 INFO L130 BoogieDeclarations]: Found specification of procedure t2_fun [2023-08-24 13:01:43,772 INFO L138 BoogieDeclarations]: Found implementation of procedure t2_fun [2023-08-24 13:01:43,773 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-24 13:01:43,773 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-24 13:01:43,773 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-24 13:01:43,773 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-24 13:01:43,773 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-08-24 13:01:43,773 INFO L130 BoogieDeclarations]: Found specification of procedure t3_fun [2023-08-24 13:01:43,775 INFO L138 BoogieDeclarations]: Found implementation of procedure t3_fun [2023-08-24 13:01:43,775 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-24 13:01:43,775 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-24 13:01:43,775 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-24 13:01:43,777 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-24 13:01:43,974 INFO L236 CfgBuilder]: Building ICFG [2023-08-24 13:01:43,977 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-24 13:01:44,378 INFO L277 CfgBuilder]: Performing block encoding [2023-08-24 13:01:44,389 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-24 13:01:44,389 INFO L302 CfgBuilder]: Removed 28 assume(true) statements. [2023-08-24 13:01:44,394 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 01:01:44 BoogieIcfgContainer [2023-08-24 13:01:44,394 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-24 13:01:44,396 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-24 13:01:44,396 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-24 13:01:44,398 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-24 13:01:44,398 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.08 01:01:42" (1/3) ... [2023-08-24 13:01:44,399 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fc0eedf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 01:01:44, skipping insertion in model container [2023-08-24 13:01:44,399 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 01:01:43" (2/3) ... [2023-08-24 13:01:44,399 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fc0eedf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 01:01:44, skipping insertion in model container [2023-08-24 13:01:44,400 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 01:01:44" (3/3) ... [2023-08-24 13:01:44,401 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_83-list2_racing1.i [2023-08-24 13:01:44,418 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-24 13:01:44,419 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-08-24 13:01:44,419 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-24 13:01:44,514 INFO L144 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2023-08-24 13:01:44,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 318 places, 356 transitions, 754 flow [2023-08-24 13:01:44,885 INFO L124 PetriNetUnfolderBase]: 164/1109 cut-off events. [2023-08-24 13:01:44,886 INFO L125 PetriNetUnfolderBase]: For 36/57 co-relation queries the response was YES. [2023-08-24 13:01:44,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1170 conditions, 1109 events. 164/1109 cut-off events. For 36/57 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 7042 event pairs, 0 based on Foata normal form. 0/937 useless extension candidates. Maximal degree in co-relation 576. Up to 16 conditions per place. [2023-08-24 13:01:44,909 INFO L82 GeneralOperation]: Start removeDead. Operand has 318 places, 356 transitions, 754 flow [2023-08-24 13:01:44,924 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 317 places, 355 transitions, 750 flow [2023-08-24 13:01:44,928 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 13:01:44,941 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 317 places, 355 transitions, 750 flow [2023-08-24 13:01:44,947 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 317 places, 355 transitions, 750 flow [2023-08-24 13:01:44,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 317 places, 355 transitions, 750 flow [2023-08-24 13:01:45,152 INFO L124 PetriNetUnfolderBase]: 164/1108 cut-off events. [2023-08-24 13:01:45,153 INFO L125 PetriNetUnfolderBase]: For 36/54 co-relation queries the response was YES. [2023-08-24 13:01:45,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1168 conditions, 1108 events. 164/1108 cut-off events. For 36/54 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 7036 event pairs, 0 based on Foata normal form. 0/936 useless extension candidates. Maximal degree in co-relation 576. Up to 16 conditions per place. [2023-08-24 13:01:45,211 INFO L119 LiptonReduction]: Number of co-enabled transitions 53030 [2023-08-24 13:02:00,263 INFO L134 LiptonReduction]: Checked pairs total: 100420 [2023-08-24 13:02:00,263 INFO L136 LiptonReduction]: Total number of compositions: 282 [2023-08-24 13:02:00,274 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 13:02:00,280 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;@2668e74d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 13:02:00,280 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-24 13:02:00,292 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 13:02:00,292 INFO L124 PetriNetUnfolderBase]: 17/118 cut-off events. [2023-08-24 13:02:00,292 INFO L125 PetriNetUnfolderBase]: For 6/9 co-relation queries the response was YES. [2023-08-24 13:02:00,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:02:00,293 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:02:00,294 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t3_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-24 13:02:00,298 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:02:00,298 INFO L85 PathProgramCache]: Analyzing trace with hash 72962584, now seen corresponding path program 1 times [2023-08-24 13:02:00,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:02:00,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419285904] [2023-08-24 13:02:00,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:02:00,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:02:00,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:02:00,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 13:02:00,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:02:00,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419285904] [2023-08-24 13:02:00,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419285904] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 13:02:00,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 13:02:00,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 13:02:00,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476480753] [2023-08-24 13:02:00,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 13:02:00,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 13:02:00,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:02:00,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 13:02:00,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 13:02:00,668 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 304 out of 638 [2023-08-24 13:02:00,674 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 114 transitions, 268 flow. Second operand has 3 states, 3 states have (on average 307.3333333333333) internal successors, (922), 3 states have internal predecessors, (922), 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) [2023-08-24 13:02:00,675 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:02:00,675 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 304 of 638 [2023-08-24 13:02:00,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:02:11,415 INFO L124 PetriNetUnfolderBase]: 109462/158248 cut-off events. [2023-08-24 13:02:11,415 INFO L125 PetriNetUnfolderBase]: For 4809/4809 co-relation queries the response was YES. [2023-08-24 13:02:11,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 306380 conditions, 158248 events. 109462/158248 cut-off events. For 4809/4809 co-relation queries the response was YES. Maximal size of possible extension queue 3488. Compared 1165540 event pairs, 68136 based on Foata normal form. 10300/142389 useless extension candidates. Maximal degree in co-relation 276915. Up to 145615 conditions per place. [2023-08-24 13:02:12,347 INFO L140 encePairwiseOnDemand]: 612/638 looper letters, 81 selfloop transitions, 2 changer transitions 1/99 dead transitions. [2023-08-24 13:02:12,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 99 transitions, 406 flow [2023-08-24 13:02:12,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 13:02:12,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 13:02:12,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1020 transitions. [2023-08-24 13:02:12,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5329153605015674 [2023-08-24 13:02:12,370 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1020 transitions. [2023-08-24 13:02:12,370 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1020 transitions. [2023-08-24 13:02:12,383 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:02:12,385 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1020 transitions. [2023-08-24 13:02:12,391 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 340.0) internal successors, (1020), 3 states have internal predecessors, (1020), 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) [2023-08-24 13:02:12,403 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 638.0) internal successors, (2552), 4 states have internal predecessors, (2552), 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) [2023-08-24 13:02:12,404 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 638.0) internal successors, (2552), 4 states have internal predecessors, (2552), 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) [2023-08-24 13:02:12,406 INFO L175 Difference]: Start difference. First operand has 85 places, 114 transitions, 268 flow. Second operand 3 states and 1020 transitions. [2023-08-24 13:02:12,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 99 transitions, 406 flow [2023-08-24 13:02:12,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 99 transitions, 402 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-24 13:02:12,424 INFO L231 Difference]: Finished difference. Result has 87 places, 91 transitions, 226 flow [2023-08-24 13:02:12,426 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=638, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=226, PETRI_PLACES=87, PETRI_TRANSITIONS=91} [2023-08-24 13:02:12,429 INFO L281 CegarLoopForPetriNet]: 85 programPoint places, 2 predicate places. [2023-08-24 13:02:12,429 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 91 transitions, 226 flow [2023-08-24 13:02:12,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 307.3333333333333) internal successors, (922), 3 states have internal predecessors, (922), 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) [2023-08-24 13:02:12,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:02:12,431 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:02:12,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-24 13:02:12,431 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t3_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-24 13:02:12,438 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:02:12,438 INFO L85 PathProgramCache]: Analyzing trace with hash -122355495, now seen corresponding path program 1 times [2023-08-24 13:02:12,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:02:12,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475203343] [2023-08-24 13:02:12,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:02:12,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:02:12,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:02:12,573 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 13:02:12,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:02:12,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475203343] [2023-08-24 13:02:12,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475203343] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:02:12,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540399056] [2023-08-24 13:02:12,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:02:12,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:02:12,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:02:12,577 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) [2023-08-24 13:02:12,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-24 13:02:12,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:02:12,745 INFO L262 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-24 13:02:12,749 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:02:12,800 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 13:02:12,800 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:02:12,823 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 13:02:12,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540399056] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 13:02:12,824 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 13:02:12,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-24 13:02:12,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514860078] [2023-08-24 13:02:12,826 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 13:02:12,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 13:02:12,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:02:12,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 13:02:12,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-24 13:02:12,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 304 out of 638 [2023-08-24 13:02:12,832 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 91 transitions, 226 flow. Second operand has 7 states, 7 states have (on average 307.2857142857143) internal successors, (2151), 7 states have internal predecessors, (2151), 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) [2023-08-24 13:02:12,832 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:02:12,832 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 304 of 638 [2023-08-24 13:02:12,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:02:12,890 INFO L124 PetriNetUnfolderBase]: 14/41 cut-off events. [2023-08-24 13:02:12,890 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-24 13:02:12,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106 conditions, 41 events. 14/41 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 73 event pairs, 1 based on Foata normal form. 8/49 useless extension candidates. Maximal degree in co-relation 99. Up to 30 conditions per place. [2023-08-24 13:02:12,891 INFO L140 encePairwiseOnDemand]: 635/638 looper letters, 0 selfloop transitions, 0 changer transitions 20/20 dead transitions. [2023-08-24 13:02:12,891 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 20 transitions, 86 flow [2023-08-24 13:02:12,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-24 13:02:12,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-24 13:02:12,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1236 transitions. [2023-08-24 13:02:12,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4843260188087774 [2023-08-24 13:02:12,898 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1236 transitions. [2023-08-24 13:02:12,899 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1236 transitions. [2023-08-24 13:02:12,904 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:02:12,904 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1236 transitions. [2023-08-24 13:02:12,907 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 309.0) internal successors, (1236), 4 states have internal predecessors, (1236), 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) [2023-08-24 13:02:12,911 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 638.0) internal successors, (3190), 5 states have internal predecessors, (3190), 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) [2023-08-24 13:02:12,913 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 638.0) internal successors, (3190), 5 states have internal predecessors, (3190), 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) [2023-08-24 13:02:12,913 INFO L175 Difference]: Start difference. First operand has 87 places, 91 transitions, 226 flow. Second operand 4 states and 1236 transitions. [2023-08-24 13:02:12,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 20 transitions, 86 flow [2023-08-24 13:02:12,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 20 transitions, 80 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-24 13:02:12,914 INFO L231 Difference]: Finished difference. Result has 19 places, 0 transitions, 0 flow [2023-08-24 13:02:12,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=638, PETRI_DIFFERENCE_MINUEND_FLOW=26, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=12, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=19, PETRI_TRANSITIONS=0} [2023-08-24 13:02:12,916 INFO L281 CegarLoopForPetriNet]: 85 programPoint places, -66 predicate places. [2023-08-24 13:02:12,916 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 0 transitions, 0 flow [2023-08-24 13:02:12,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 307.2857142857143) internal successors, (2151), 7 states have internal predecessors, (2151), 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) [2023-08-24 13:02:12,920 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2023-08-24 13:02:12,921 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-08-24 13:02:12,921 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t3_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-08-24 13:02:12,922 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t3_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-08-24 13:02:12,929 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-24 13:02:13,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:02:13,127 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-24 13:02:13,129 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-24 13:02:13,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 318 places, 356 transitions, 754 flow [2023-08-24 13:02:13,258 INFO L124 PetriNetUnfolderBase]: 164/1109 cut-off events. [2023-08-24 13:02:13,258 INFO L125 PetriNetUnfolderBase]: For 36/57 co-relation queries the response was YES. [2023-08-24 13:02:13,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1170 conditions, 1109 events. 164/1109 cut-off events. For 36/57 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 7042 event pairs, 0 based on Foata normal form. 0/937 useless extension candidates. Maximal degree in co-relation 576. Up to 16 conditions per place. [2023-08-24 13:02:13,270 INFO L82 GeneralOperation]: Start removeDead. Operand has 318 places, 356 transitions, 754 flow [2023-08-24 13:02:13,276 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 318 places, 356 transitions, 754 flow [2023-08-24 13:02:13,276 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 13:02:13,276 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 318 places, 356 transitions, 754 flow [2023-08-24 13:02:13,277 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 318 places, 356 transitions, 754 flow [2023-08-24 13:02:13,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 318 places, 356 transitions, 754 flow [2023-08-24 13:02:13,391 INFO L124 PetriNetUnfolderBase]: 164/1109 cut-off events. [2023-08-24 13:02:13,391 INFO L125 PetriNetUnfolderBase]: For 36/57 co-relation queries the response was YES. [2023-08-24 13:02:13,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1170 conditions, 1109 events. 164/1109 cut-off events. For 36/57 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 7042 event pairs, 0 based on Foata normal form. 0/937 useless extension candidates. Maximal degree in co-relation 576. Up to 16 conditions per place. [2023-08-24 13:02:13,433 INFO L119 LiptonReduction]: Number of co-enabled transitions 53084 [2023-08-24 13:02:27,385 INFO L134 LiptonReduction]: Checked pairs total: 107924 [2023-08-24 13:02:27,386 INFO L136 LiptonReduction]: Total number of compositions: 282 [2023-08-24 13:02:27,387 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-24 13:02:27,388 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;@2668e74d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 13:02:27,388 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-24 13:02:27,392 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 13:02:27,392 INFO L124 PetriNetUnfolderBase]: 2/27 cut-off events. [2023-08-24 13:02:27,392 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 13:02:27,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:02:27,392 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-24 13:02:27,392 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 13:02:27,393 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:02:27,393 INFO L85 PathProgramCache]: Analyzing trace with hash -1893483561, now seen corresponding path program 1 times [2023-08-24 13:02:27,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:02:27,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415364303] [2023-08-24 13:02:27,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:02:27,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:02:27,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 13:02:27,427 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-24 13:02:27,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 13:02:27,479 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-24 13:02:27,479 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-24 13:02:27,479 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-24 13:02:27,483 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-24 13:02:27,484 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-24 13:02:27,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-24 13:02:27,484 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-24 13:02:27,485 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN (2/2) [2023-08-24 13:02:27,486 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-24 13:02:27,486 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-24 13:02:27,585 INFO L144 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2023-08-24 13:02:27,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 500 places, 571 transitions, 1232 flow [2023-08-24 13:02:28,723 INFO L124 PetriNetUnfolderBase]: 1130/5714 cut-off events. [2023-08-24 13:02:28,723 INFO L125 PetriNetUnfolderBase]: For 602/680 co-relation queries the response was YES. [2023-08-24 13:02:28,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6388 conditions, 5714 events. 1130/5714 cut-off events. For 602/680 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 52808 event pairs, 22 based on Foata normal form. 0/4868 useless extension candidates. Maximal degree in co-relation 3562. Up to 192 conditions per place. [2023-08-24 13:02:28,837 INFO L82 GeneralOperation]: Start removeDead. Operand has 500 places, 571 transitions, 1232 flow [2023-08-24 13:02:28,902 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 499 places, 570 transitions, 1226 flow [2023-08-24 13:02:28,903 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 13:02:28,903 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 499 places, 570 transitions, 1226 flow [2023-08-24 13:02:28,903 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 499 places, 570 transitions, 1226 flow [2023-08-24 13:02:28,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 499 places, 570 transitions, 1226 flow [2023-08-24 13:02:29,837 INFO L124 PetriNetUnfolderBase]: 1130/5713 cut-off events. [2023-08-24 13:02:29,837 INFO L125 PetriNetUnfolderBase]: For 601/673 co-relation queries the response was YES. [2023-08-24 13:02:29,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6385 conditions, 5713 events. 1130/5713 cut-off events. For 601/673 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 52749 event pairs, 22 based on Foata normal form. 0/4867 useless extension candidates. Maximal degree in co-relation 3562. Up to 192 conditions per place. [2023-08-24 13:02:30,330 INFO L119 LiptonReduction]: Number of co-enabled transitions 196760 [2023-08-24 13:02:45,849 INFO L134 LiptonReduction]: Checked pairs total: 422332 [2023-08-24 13:02:45,849 INFO L136 LiptonReduction]: Total number of compositions: 437 [2023-08-24 13:02:45,851 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 13:02:45,852 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;@2668e74d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 13:02:45,852 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-24 13:02:45,867 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 13:02:45,867 INFO L124 PetriNetUnfolderBase]: 27/160 cut-off events. [2023-08-24 13:02:45,867 INFO L125 PetriNetUnfolderBase]: For 14/19 co-relation queries the response was YES. [2023-08-24 13:02:45,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:02:45,867 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:02:45,868 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t3_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t3_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-24 13:02:45,868 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:02:45,868 INFO L85 PathProgramCache]: Analyzing trace with hash -266201482, now seen corresponding path program 1 times [2023-08-24 13:02:45,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:02:45,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876546250] [2023-08-24 13:02:45,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:02:45,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:02:45,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:02:45,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 13:02:45,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:02:45,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876546250] [2023-08-24 13:02:45,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876546250] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 13:02:45,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 13:02:45,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 13:02:45,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924737657] [2023-08-24 13:02:45,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 13:02:45,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 13:02:45,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:02:45,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 13:02:45,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 13:02:45,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 481 out of 1008 [2023-08-24 13:02:45,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 203 transitions, 492 flow. Second operand has 3 states, 3 states have (on average 484.0) internal successors, (1452), 3 states have internal predecessors, (1452), 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) [2023-08-24 13:02:45,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:02:45,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 481 of 1008 [2023-08-24 13:02:45,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand