/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_82-list_racefree.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-24 13:01:20,269 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-24 13:01:20,355 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 13:01:20,360 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-24 13:01:20,361 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-24 13:01:20,392 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-24 13:01:20,393 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-24 13:01:20,397 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-24 13:01:20,398 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-24 13:01:20,401 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-24 13:01:20,402 INFO L153 SettingsManager]: * Use SBE=true [2023-08-24 13:01:20,402 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-24 13:01:20,402 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-24 13:01:20,403 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-24 13:01:20,403 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-24 13:01:20,404 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-24 13:01:20,404 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-24 13:01:20,404 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-24 13:01:20,404 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-24 13:01:20,405 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-24 13:01:20,405 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-24 13:01:20,406 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-24 13:01:20,406 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-24 13:01:20,406 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-24 13:01:20,407 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-24 13:01:20,407 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-24 13:01:20,407 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-24 13:01:20,407 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 13:01:20,408 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-24 13:01:20,408 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-24 13:01:20,409 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-24 13:01:20,409 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-24 13:01:20,409 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-24 13:01:20,409 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-24 13:01:20,409 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-24 13:01:20,410 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-24 13:01:20,719 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-24 13:01:20,739 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-24 13:01:20,741 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-24 13:01:20,741 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-24 13:01:20,742 INFO L274 PluginConnector]: CDTParser initialized [2023-08-24 13:01:20,743 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_82-list_racefree.i [2023-08-24 13:01:21,951 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-24 13:01:22,231 INFO L384 CDTParser]: Found 1 translation units. [2023-08-24 13:01:22,232 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_82-list_racefree.i [2023-08-24 13:01:22,256 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/caa5b8532/89fe6a9c321f46cb8692b775ff437338/FLAG32ab9f3fc [2023-08-24 13:01:22,271 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/caa5b8532/89fe6a9c321f46cb8692b775ff437338 [2023-08-24 13:01:22,273 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-24 13:01:22,274 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-24 13:01:22,275 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-24 13:01:22,276 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-24 13:01:22,278 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-24 13:01:22,278 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 01:01:22" (1/1) ... [2023-08-24 13:01:22,281 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36c7ec05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 01:01:22, skipping insertion in model container [2023-08-24 13:01:22,281 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 01:01:22" (1/1) ... [2023-08-24 13:01:22,334 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-24 13:01:22,741 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_82-list_racefree.i[47038,47051] [2023-08-24 13:01:22,778 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 13:01:22,790 INFO L201 MainTranslator]: Completed pre-run [2023-08-24 13:01:22,808 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [261] [2023-08-24 13:01:22,810 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [261] [2023-08-24 13:01:22,825 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_82-list_racefree.i[47038,47051] [2023-08-24 13:01:22,853 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 13:01:22,924 INFO L206 MainTranslator]: Completed translation [2023-08-24 13:01:22,924 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 01:01:22 WrapperNode [2023-08-24 13:01:22,924 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-24 13:01:22,926 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-24 13:01:22,926 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-24 13:01:22,926 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-24 13:01:22,932 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 01:01:22" (1/1) ... [2023-08-24 13:01:22,960 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 01:01:22" (1/1) ... [2023-08-24 13:01:22,985 INFO L138 Inliner]: procedures = 278, calls = 61, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 212 [2023-08-24 13:01:22,986 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-24 13:01:22,986 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-24 13:01:22,986 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-24 13:01:22,986 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-24 13:01:22,994 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 01:01:22" (1/1) ... [2023-08-24 13:01:22,994 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 01:01:22" (1/1) ... [2023-08-24 13:01:22,998 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 01:01:22" (1/1) ... [2023-08-24 13:01:22,998 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 01:01:22" (1/1) ... [2023-08-24 13:01:23,005 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 01:01:22" (1/1) ... [2023-08-24 13:01:23,015 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 01:01:22" (1/1) ... [2023-08-24 13:01:23,017 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 01:01:22" (1/1) ... [2023-08-24 13:01:23,018 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 01:01:22" (1/1) ... [2023-08-24 13:01:23,021 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-24 13:01:23,022 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-24 13:01:23,022 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-24 13:01:23,022 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-24 13:01:23,023 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 01:01:22" (1/1) ... [2023-08-24 13:01:23,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 13:01:23,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:01:23,047 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 13:01:23,053 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 13:01:23,072 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-24 13:01:23,073 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-08-24 13:01:23,073 INFO L130 BoogieDeclarations]: Found specification of procedure t1_fun [2023-08-24 13:01:23,073 INFO L138 BoogieDeclarations]: Found implementation of procedure t1_fun [2023-08-24 13:01:23,073 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-24 13:01:23,073 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-24 13:01:23,073 INFO L130 BoogieDeclarations]: Found specification of procedure t2_fun [2023-08-24 13:01:23,073 INFO L138 BoogieDeclarations]: Found implementation of procedure t2_fun [2023-08-24 13:01:23,073 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-24 13:01:23,074 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-24 13:01:23,074 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-24 13:01:23,074 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-24 13:01:23,074 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-08-24 13:01:23,074 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-24 13:01:23,074 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-24 13:01:23,074 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-24 13:01:23,075 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 13:01:23,195 INFO L236 CfgBuilder]: Building ICFG [2023-08-24 13:01:23,197 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-24 13:01:23,499 INFO L277 CfgBuilder]: Performing block encoding [2023-08-24 13:01:23,506 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-24 13:01:23,506 INFO L302 CfgBuilder]: Removed 15 assume(true) statements. [2023-08-24 13:01:23,508 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 01:01:23 BoogieIcfgContainer [2023-08-24 13:01:23,508 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-24 13:01:23,510 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-24 13:01:23,510 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-24 13:01:23,512 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-24 13:01:23,512 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.08 01:01:22" (1/3) ... [2023-08-24 13:01:23,517 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16d8ba78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 01:01:23, skipping insertion in model container [2023-08-24 13:01:23,517 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 01:01:22" (2/3) ... [2023-08-24 13:01:23,517 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16d8ba78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 01:01:23, skipping insertion in model container [2023-08-24 13:01:23,518 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 01:01:23" (3/3) ... [2023-08-24 13:01:23,519 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_82-list_racefree.i [2023-08-24 13:01:23,533 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-24 13:01:23,534 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-24 13:01:23,534 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-24 13:01:23,662 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-24 13:01:23,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 196 places, 214 transitions, 450 flow [2023-08-24 13:01:23,813 INFO L124 PetriNetUnfolderBase]: 52/416 cut-off events. [2023-08-24 13:01:23,813 INFO L125 PetriNetUnfolderBase]: For 8/14 co-relation queries the response was YES. [2023-08-24 13:01:23,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 436 conditions, 416 events. 52/416 cut-off events. For 8/14 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1716 event pairs, 0 based on Foata normal form. 0/356 useless extension candidates. Maximal degree in co-relation 213. Up to 8 conditions per place. [2023-08-24 13:01:23,826 INFO L82 GeneralOperation]: Start removeDead. Operand has 196 places, 214 transitions, 450 flow [2023-08-24 13:01:23,837 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 195 places, 211 transitions, 436 flow [2023-08-24 13:01:23,841 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 13:01:23,850 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 195 places, 211 transitions, 436 flow [2023-08-24 13:01:23,853 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 195 places, 211 transitions, 436 flow [2023-08-24 13:01:23,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 195 places, 211 transitions, 436 flow [2023-08-24 13:01:23,945 INFO L124 PetriNetUnfolderBase]: 48/403 cut-off events. [2023-08-24 13:01:23,945 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-08-24 13:01:23,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 418 conditions, 403 events. 48/403 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1637 event pairs, 0 based on Foata normal form. 0/343 useless extension candidates. Maximal degree in co-relation 201. Up to 8 conditions per place. [2023-08-24 13:01:23,959 INFO L119 LiptonReduction]: Number of co-enabled transitions 13602 [2023-08-24 13:01:30,771 INFO L134 LiptonReduction]: Checked pairs total: 23081 [2023-08-24 13:01:30,771 INFO L136 LiptonReduction]: Total number of compositions: 172 [2023-08-24 13:01:30,781 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 13:01:30,787 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;@1914b473, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 13:01:30,787 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-24 13:01:30,795 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 13:01:30,795 INFO L124 PetriNetUnfolderBase]: 7/68 cut-off events. [2023-08-24 13:01:30,796 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 13:01:30,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:01:30,796 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:01:30,797 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-24 13:01:30,802 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:01:30,802 INFO L85 PathProgramCache]: Analyzing trace with hash 214316130, now seen corresponding path program 1 times [2023-08-24 13:01:30,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:01:30,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404654100] [2023-08-24 13:01:30,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:01:30,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:01:30,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:01:31,127 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 13:01:31,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:01:31,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404654100] [2023-08-24 13:01:31,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404654100] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 13:01:31,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 13:01:31,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 13:01:31,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296310222] [2023-08-24 13:01:31,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 13:01:31,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 13:01:31,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:01:31,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 13:01:31,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 13:01:31,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 386 [2023-08-24 13:01:31,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 60 transitions, 134 flow. Second operand has 3 states, 3 states have (on average 186.0) internal successors, (558), 3 states have internal predecessors, (558), 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 13:01:31,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:01:31,170 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 386 [2023-08-24 13:01:31,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:01:31,722 INFO L124 PetriNetUnfolderBase]: 2607/4378 cut-off events. [2023-08-24 13:01:31,723 INFO L125 PetriNetUnfolderBase]: For 104/104 co-relation queries the response was YES. [2023-08-24 13:01:31,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8511 conditions, 4378 events. 2607/4378 cut-off events. For 104/104 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 24344 event pairs, 1224 based on Foata normal form. 320/3956 useless extension candidates. Maximal degree in co-relation 7815. Up to 4056 conditions per place. [2023-08-24 13:01:31,737 INFO L140 encePairwiseOnDemand]: 372/386 looper letters, 37 selfloop transitions, 2 changer transitions 15/57 dead transitions. [2023-08-24 13:01:31,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 57 transitions, 230 flow [2023-08-24 13:01:31,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 13:01:31,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 13:01:31,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 612 transitions. [2023-08-24 13:01:31,750 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5284974093264249 [2023-08-24 13:01:31,751 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 612 transitions. [2023-08-24 13:01:31,751 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 612 transitions. [2023-08-24 13:01:31,753 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:01:31,754 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 612 transitions. [2023-08-24 13:01:31,759 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 204.0) internal successors, (612), 3 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:01:31,765 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 386.0) internal successors, (1544), 4 states have internal predecessors, (1544), 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 13:01:31,766 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 386.0) internal successors, (1544), 4 states have internal predecessors, (1544), 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 13:01:31,767 INFO L175 Difference]: Start difference. First operand has 50 places, 60 transitions, 134 flow. Second operand 3 states and 612 transitions. [2023-08-24 13:01:31,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 57 transitions, 230 flow [2023-08-24 13:01:31,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 57 transitions, 227 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-24 13:01:31,772 INFO L231 Difference]: Finished difference. Result has 52 places, 35 transitions, 89 flow [2023-08-24 13:01:31,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=386, PETRI_DIFFERENCE_MINUEND_FLOW=109, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=89, PETRI_PLACES=52, PETRI_TRANSITIONS=35} [2023-08-24 13:01:31,776 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 2 predicate places. [2023-08-24 13:01:31,776 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 35 transitions, 89 flow [2023-08-24 13:01:31,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 186.0) internal successors, (558), 3 states have internal predecessors, (558), 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 13:01:31,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:01:31,777 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:01:31,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-24 13:01:31,777 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-24 13:01:31,778 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:01:31,778 INFO L85 PathProgramCache]: Analyzing trace with hash -1187068148, now seen corresponding path program 1 times [2023-08-24 13:01:31,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:01:31,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347833934] [2023-08-24 13:01:31,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:01:31,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:01:31,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:01:31,881 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 13:01:31,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:01:31,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347833934] [2023-08-24 13:01:31,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347833934] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:01:31,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905952400] [2023-08-24 13:01:31,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:01:31,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:01:31,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:01:31,885 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 13:01:31,896 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 13:01:32,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:01:32,025 INFO L262 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-24 13:01:32,029 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:01:32,068 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 13:01:32,069 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:01:32,091 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 13:01:32,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905952400] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 13:01:32,092 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 13:01:32,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-24 13:01:32,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805701338] [2023-08-24 13:01:32,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 13:01:32,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 13:01:32,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:01:32,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 13:01:32,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-24 13:01:32,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 386 [2023-08-24 13:01:32,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 35 transitions, 89 flow. Second operand has 7 states, 7 states have (on average 186.14285714285714) internal successors, (1303), 7 states have internal predecessors, (1303), 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 13:01:32,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:01:32,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 386 [2023-08-24 13:01:32,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:01:32,132 INFO L124 PetriNetUnfolderBase]: 14/41 cut-off events. [2023-08-24 13:01:32,132 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-24 13:01:32,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105 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 77 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 13:01:32,133 INFO L140 encePairwiseOnDemand]: 383/386 looper letters, 0 selfloop transitions, 0 changer transitions 20/20 dead transitions. [2023-08-24 13:01:32,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 20 transitions, 86 flow [2023-08-24 13:01:32,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-24 13:01:32,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-24 13:01:32,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 752 transitions. [2023-08-24 13:01:32,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48704663212435234 [2023-08-24 13:01:32,136 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 752 transitions. [2023-08-24 13:01:32,137 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 752 transitions. [2023-08-24 13:01:32,140 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:01:32,140 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 752 transitions. [2023-08-24 13:01:32,146 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 188.0) internal successors, (752), 4 states have internal predecessors, (752), 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 13:01:32,149 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 386.0) internal successors, (1930), 5 states have internal predecessors, (1930), 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 13:01:32,150 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 386.0) internal successors, (1930), 5 states have internal predecessors, (1930), 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 13:01:32,150 INFO L175 Difference]: Start difference. First operand has 52 places, 35 transitions, 89 flow. Second operand 4 states and 752 transitions. [2023-08-24 13:01:32,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 20 transitions, 86 flow [2023-08-24 13:01:32,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 20 transitions, 80 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-24 13:01:32,151 INFO L231 Difference]: Finished difference. Result has 18 places, 0 transitions, 0 flow [2023-08-24 13:01:32,151 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=386, PETRI_DIFFERENCE_MINUEND_FLOW=26, PETRI_DIFFERENCE_MINUEND_PLACES=15, 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=18, PETRI_TRANSITIONS=0} [2023-08-24 13:01:32,153 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -32 predicate places. [2023-08-24 13:01:32,153 INFO L495 AbstractCegarLoop]: Abstraction has has 18 places, 0 transitions, 0 flow [2023-08-24 13:01:32,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 186.14285714285714) internal successors, (1303), 7 states have internal predecessors, (1303), 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 13:01:32,156 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2023-08-24 13:01:32,157 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-08-24 13:01:32,165 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-24 13:01:32,364 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 13:01:32,365 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-24 13:01:32,367 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE (1/2) [2023-08-24 13:01:32,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 196 places, 214 transitions, 450 flow [2023-08-24 13:01:32,410 INFO L124 PetriNetUnfolderBase]: 52/416 cut-off events. [2023-08-24 13:01:32,410 INFO L125 PetriNetUnfolderBase]: For 8/14 co-relation queries the response was YES. [2023-08-24 13:01:32,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 436 conditions, 416 events. 52/416 cut-off events. For 8/14 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1716 event pairs, 0 based on Foata normal form. 0/356 useless extension candidates. Maximal degree in co-relation 213. Up to 8 conditions per place. [2023-08-24 13:01:32,411 INFO L82 GeneralOperation]: Start removeDead. Operand has 196 places, 214 transitions, 450 flow [2023-08-24 13:01:32,413 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 196 places, 212 transitions, 440 flow [2023-08-24 13:01:32,413 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 13:01:32,413 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 196 places, 212 transitions, 440 flow [2023-08-24 13:01:32,413 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 196 places, 212 transitions, 440 flow [2023-08-24 13:01:32,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 196 places, 212 transitions, 440 flow [2023-08-24 13:01:32,444 INFO L124 PetriNetUnfolderBase]: 48/404 cut-off events. [2023-08-24 13:01:32,445 INFO L125 PetriNetUnfolderBase]: For 4/6 co-relation queries the response was YES. [2023-08-24 13:01:32,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 420 conditions, 404 events. 48/404 cut-off events. For 4/6 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1637 event pairs, 0 based on Foata normal form. 0/344 useless extension candidates. Maximal degree in co-relation 201. Up to 8 conditions per place. [2023-08-24 13:01:32,454 INFO L119 LiptonReduction]: Number of co-enabled transitions 13648 [2023-08-24 13:01:38,397 INFO L134 LiptonReduction]: Checked pairs total: 21550 [2023-08-24 13:01:38,398 INFO L136 LiptonReduction]: Total number of compositions: 172 [2023-08-24 13:01:38,400 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-24 13:01:38,401 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;@1914b473, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 13:01:38,401 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-24 13:01:38,427 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 13:01:38,427 INFO L124 PetriNetUnfolderBase]: 2/25 cut-off events. [2023-08-24 13:01:38,427 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 13:01:38,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:01:38,428 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-24 13:01:38,428 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 13:01:38,428 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:01:38,428 INFO L85 PathProgramCache]: Analyzing trace with hash -206989374, now seen corresponding path program 1 times [2023-08-24 13:01:38,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:01:38,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484068216] [2023-08-24 13:01:38,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:01:38,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:01:38,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 13:01:38,466 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-24 13:01:38,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 13:01:38,512 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-24 13:01:38,512 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-24 13:01:38,512 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-24 13:01:38,512 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-24 13:01:38,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-24 13:01:38,513 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-24 13:01:38,513 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (2/2) [2023-08-24 13:01:38,514 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-24 13:01:38,514 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-24 13:01:38,573 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-24 13:01:38,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 298 places, 331 transitions, 710 flow [2023-08-24 13:01:38,740 INFO L124 PetriNetUnfolderBase]: 191/1239 cut-off events. [2023-08-24 13:01:38,740 INFO L125 PetriNetUnfolderBase]: For 72/102 co-relation queries the response was YES. [2023-08-24 13:01:38,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1336 conditions, 1239 events. 191/1239 cut-off events. For 72/102 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 7833 event pairs, 1 based on Foata normal form. 0/1052 useless extension candidates. Maximal degree in co-relation 779. Up to 32 conditions per place. [2023-08-24 13:01:38,754 INFO L82 GeneralOperation]: Start removeDead. Operand has 298 places, 331 transitions, 710 flow [2023-08-24 13:01:38,764 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 297 places, 330 transitions, 704 flow [2023-08-24 13:01:38,764 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 13:01:38,764 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 297 places, 330 transitions, 704 flow [2023-08-24 13:01:38,764 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 297 places, 330 transitions, 704 flow [2023-08-24 13:01:38,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 297 places, 330 transitions, 704 flow [2023-08-24 13:01:38,917 INFO L124 PetriNetUnfolderBase]: 191/1238 cut-off events. [2023-08-24 13:01:38,918 INFO L125 PetriNetUnfolderBase]: For 71/97 co-relation queries the response was YES. [2023-08-24 13:01:38,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1333 conditions, 1238 events. 191/1238 cut-off events. For 71/97 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 7829 event pairs, 1 based on Foata normal form. 0/1051 useless extension candidates. Maximal degree in co-relation 779. Up to 32 conditions per place. [2023-08-24 13:01:38,983 INFO L119 LiptonReduction]: Number of co-enabled transitions 54856 [2023-08-24 13:01:45,805 INFO L134 LiptonReduction]: Checked pairs total: 107618 [2023-08-24 13:01:45,805 INFO L136 LiptonReduction]: Total number of compositions: 250 [2023-08-24 13:01:45,807 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 13:01:45,808 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;@1914b473, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 13:01:45,808 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-24 13:01:45,815 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 13:01:45,815 INFO L124 PetriNetUnfolderBase]: 9/86 cut-off events. [2023-08-24 13:01:45,815 INFO L125 PetriNetUnfolderBase]: For 6/8 co-relation queries the response was YES. [2023-08-24 13:01:45,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:01:45,815 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:01:45,815 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-24 13:01:45,816 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:01:45,816 INFO L85 PathProgramCache]: Analyzing trace with hash 95303936, now seen corresponding path program 1 times [2023-08-24 13:01:45,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:01:45,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253855044] [2023-08-24 13:01:45,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:01:45,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:01:45,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:01:45,854 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 13:01:45,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:01:45,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253855044] [2023-08-24 13:01:45,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253855044] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 13:01:45,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 13:01:45,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 13:01:45,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894862431] [2023-08-24 13:01:45,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 13:01:45,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 13:01:45,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:01:45,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 13:01:45,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 13:01:45,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 281 out of 581 [2023-08-24 13:01:45,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 114 transitions, 272 flow. Second operand has 3 states, 3 states have (on average 284.0) internal successors, (852), 3 states have internal predecessors, (852), 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 13:01:45,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:01:45,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 281 of 581 [2023-08-24 13:01:45,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:03:01,700 INFO L124 PetriNetUnfolderBase]: 824347/1098855 cut-off events. [2023-08-24 13:03:01,700 INFO L125 PetriNetUnfolderBase]: For 46792/46792 co-relation queries the response was YES. [2023-08-24 13:03:03,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2158756 conditions, 1098855 events. 824347/1098855 cut-off events. For 46792/46792 co-relation queries the response was YES. Maximal size of possible extension queue 22507. Compared 8483489 event pairs, 576024 based on Foata normal form. 74880/1019506 useless extension candidates. Maximal degree in co-relation 341991. Up to 1038244 conditions per place. [2023-08-24 13:03:06,249 INFO L140 encePairwiseOnDemand]: 556/581 looper letters, 82 selfloop transitions, 2 changer transitions 0/101 dead transitions. [2023-08-24 13:03:06,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 101 transitions, 414 flow [2023-08-24 13:03:06,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 13:03:06,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 13:03:06,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 950 transitions. [2023-08-24 13:03:06,253 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5450372920252439 [2023-08-24 13:03:06,253 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 950 transitions. [2023-08-24 13:03:06,253 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 950 transitions. [2023-08-24 13:03:06,253 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:03:06,253 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 950 transitions. [2023-08-24 13:03:06,256 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 316.6666666666667) internal successors, (950), 3 states have internal predecessors, (950), 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 13:03:06,259 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 581.0) internal successors, (2324), 4 states have internal predecessors, (2324), 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 13:03:06,260 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 581.0) internal successors, (2324), 4 states have internal predecessors, (2324), 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 13:03:06,260 INFO L175 Difference]: Start difference. First operand has 89 places, 114 transitions, 272 flow. Second operand 3 states and 950 transitions. [2023-08-24 13:03:06,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 101 transitions, 414 flow [2023-08-24 13:03:06,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 101 transitions, 411 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-24 13:03:06,390 INFO L231 Difference]: Finished difference. Result has 91 places, 93 transitions, 237 flow [2023-08-24 13:03:06,390 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=581, PETRI_DIFFERENCE_MINUEND_FLOW=225, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=237, PETRI_PLACES=91, PETRI_TRANSITIONS=93} [2023-08-24 13:03:06,391 INFO L281 CegarLoopForPetriNet]: 89 programPoint places, 2 predicate places. [2023-08-24 13:03:06,391 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 93 transitions, 237 flow [2023-08-24 13:03:06,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 284.0) internal successors, (852), 3 states have internal predecessors, (852), 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 13:03:06,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:03:06,392 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:03:06,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-24 13:03:06,392 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-24 13:03:06,393 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:03:06,393 INFO L85 PathProgramCache]: Analyzing trace with hash 1125405653, now seen corresponding path program 1 times [2023-08-24 13:03:06,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:03:06,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029290269] [2023-08-24 13:03:06,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:03:06,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:03:06,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:03:06,471 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 13:03:06,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:03:06,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029290269] [2023-08-24 13:03:06,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029290269] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:03:06,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053519289] [2023-08-24 13:03:06,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:03:06,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:03:06,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:03:06,477 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 13:03:06,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-24 13:03:06,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:03:06,595 INFO L262 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-24 13:03:06,596 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:03:06,608 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 13:03:06,609 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:03:06,624 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 13:03:06,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053519289] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 13:03:06,624 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 13:03:06,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-24 13:03:06,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822088078] [2023-08-24 13:03:06,624 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 13:03:06,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 13:03:06,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:03:06,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 13:03:06,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-24 13:03:06,627 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 281 out of 581 [2023-08-24 13:03:06,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 93 transitions, 237 flow. Second operand has 7 states, 7 states have (on average 284.14285714285717) internal successors, (1989), 7 states have internal predecessors, (1989), 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 13:03:06,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:03:06,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 281 of 581 [2023-08-24 13:03:06,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:03:06,911 INFO L124 PetriNetUnfolderBase]: 257/477 cut-off events. [2023-08-24 13:03:06,911 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-24 13:03:06,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1027 conditions, 477 events. 257/477 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 2001 event pairs, 0 based on Foata normal form. 64/540 useless extension candidates. Maximal degree in co-relation 1019. Up to 306 conditions per place. [2023-08-24 13:03:06,912 INFO L140 encePairwiseOnDemand]: 578/581 looper letters, 0 selfloop transitions, 0 changer transitions 45/45 dead transitions. [2023-08-24 13:03:06,912 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 45 transitions, 187 flow [2023-08-24 13:03:06,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 13:03:06,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 13:03:06,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1448 transitions. [2023-08-24 13:03:06,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49845094664371775 [2023-08-24 13:03:06,932 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1448 transitions. [2023-08-24 13:03:06,932 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1448 transitions. [2023-08-24 13:03:06,933 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:03:06,933 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1448 transitions. [2023-08-24 13:03:06,936 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 289.6) internal successors, (1448), 5 states have internal predecessors, (1448), 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 13:03:06,943 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 581.0) internal successors, (3486), 6 states have internal predecessors, (3486), 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 13:03:06,945 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 581.0) internal successors, (3486), 6 states have internal predecessors, (3486), 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 13:03:06,945 INFO L175 Difference]: Start difference. First operand has 91 places, 93 transitions, 237 flow. Second operand 5 states and 1448 transitions. [2023-08-24 13:03:06,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 45 transitions, 187 flow [2023-08-24 13:03:06,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 45 transitions, 185 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-24 13:03:06,947 INFO L231 Difference]: Finished difference. Result has 34 places, 0 transitions, 0 flow [2023-08-24 13:03:06,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=581, PETRI_DIFFERENCE_MINUEND_FLOW=59, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=34, PETRI_TRANSITIONS=0} [2023-08-24 13:03:06,950 INFO L281 CegarLoopForPetriNet]: 89 programPoint places, -55 predicate places. [2023-08-24 13:03:06,950 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 0 transitions, 0 flow [2023-08-24 13:03:06,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 284.14285714285717) internal successors, (1989), 7 states have internal predecessors, (1989), 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 13:03:06,952 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-08-24 13:03:06,952 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-08-24 13:03:06,952 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-08-24 13:03:06,959 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-24 13:03:07,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:03:07,157 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-24 13:03:07,157 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE (1/2) [2023-08-24 13:03:07,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 298 places, 331 transitions, 710 flow [2023-08-24 13:03:07,312 INFO L124 PetriNetUnfolderBase]: 191/1239 cut-off events. [2023-08-24 13:03:07,312 INFO L125 PetriNetUnfolderBase]: For 72/102 co-relation queries the response was YES. [2023-08-24 13:03:07,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1336 conditions, 1239 events. 191/1239 cut-off events. For 72/102 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 7833 event pairs, 1 based on Foata normal form. 0/1052 useless extension candidates. Maximal degree in co-relation 779. Up to 32 conditions per place. [2023-08-24 13:03:07,328 INFO L82 GeneralOperation]: Start removeDead. Operand has 298 places, 331 transitions, 710 flow [2023-08-24 13:03:07,336 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 298 places, 331 transitions, 710 flow [2023-08-24 13:03:07,337 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 13:03:07,337 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 298 places, 331 transitions, 710 flow [2023-08-24 13:03:07,337 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 298 places, 331 transitions, 710 flow [2023-08-24 13:03:07,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 298 places, 331 transitions, 710 flow [2023-08-24 13:03:07,475 INFO L124 PetriNetUnfolderBase]: 191/1239 cut-off events. [2023-08-24 13:03:07,476 INFO L125 PetriNetUnfolderBase]: For 72/102 co-relation queries the response was YES. [2023-08-24 13:03:07,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1336 conditions, 1239 events. 191/1239 cut-off events. For 72/102 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 7833 event pairs, 1 based on Foata normal form. 0/1052 useless extension candidates. Maximal degree in co-relation 779. Up to 32 conditions per place. [2023-08-24 13:03:07,535 INFO L119 LiptonReduction]: Number of co-enabled transitions 54948 [2023-08-24 13:03:14,624 INFO L134 LiptonReduction]: Checked pairs total: 118473 [2023-08-24 13:03:14,624 INFO L136 LiptonReduction]: Total number of compositions: 252 [2023-08-24 13:03:14,626 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-24 13:03:14,626 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;@1914b473, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 13:03:14,626 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-24 13:03:14,632 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 13:03:14,632 INFO L124 PetriNetUnfolderBase]: 13/95 cut-off events. [2023-08-24 13:03:14,632 INFO L125 PetriNetUnfolderBase]: For 7/8 co-relation queries the response was YES. [2023-08-24 13:03:14,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:03:14,632 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-24 13:03:14,633 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 13:03:14,633 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:03:14,633 INFO L85 PathProgramCache]: Analyzing trace with hash -87116328, now seen corresponding path program 1 times [2023-08-24 13:03:14,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:03:14,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046161320] [2023-08-24 13:03:14,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:03:14,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:03:14,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 13:03:14,662 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-24 13:03:14,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 13:03:14,678 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-24 13:03:14,678 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-24 13:03:14,678 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-24 13:03:14,679 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-24 13:03:14,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-24 13:03:14,679 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-24 13:03:14,679 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (2/2) [2023-08-24 13:03:14,679 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-24 13:03:14,679 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-24 13:03:14,728 INFO L144 ThreadInstanceAdder]: Constructed 12 joinOtherThreadTransitions. [2023-08-24 13:03:14,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 400 places, 448 transitions, 974 flow [2023-08-24 13:03:15,247 INFO L124 PetriNetUnfolderBase]: 664/3466 cut-off events. [2023-08-24 13:03:15,247 INFO L125 PetriNetUnfolderBase]: For 419/469 co-relation queries the response was YES. [2023-08-24 13:03:15,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3917 conditions, 3466 events. 664/3466 cut-off events. For 419/469 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 26984 event pairs, 32 based on Foata normal form. 0/2974 useless extension candidates. Maximal degree in co-relation 2257. Up to 192 conditions per place. [2023-08-24 13:03:15,309 INFO L82 GeneralOperation]: Start removeDead. Operand has 400 places, 448 transitions, 974 flow [2023-08-24 13:03:15,346 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 399 places, 447 transitions, 966 flow [2023-08-24 13:03:15,346 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 13:03:15,346 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 399 places, 447 transitions, 966 flow [2023-08-24 13:03:15,347 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 399 places, 447 transitions, 966 flow [2023-08-24 13:03:15,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 399 places, 447 transitions, 966 flow [2023-08-24 13:03:15,981 INFO L124 PetriNetUnfolderBase]: 664/3465 cut-off events. [2023-08-24 13:03:15,981 INFO L125 PetriNetUnfolderBase]: For 416/462 co-relation queries the response was YES. [2023-08-24 13:03:16,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3913 conditions, 3465 events. 664/3465 cut-off events. For 416/462 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 27036 event pairs, 32 based on Foata normal form. 0/2973 useless extension candidates. Maximal degree in co-relation 2257. Up to 192 conditions per place. [2023-08-24 13:03:16,153 INFO L119 LiptonReduction]: Number of co-enabled transitions 122382 [2023-08-24 13:03:24,227 INFO L134 LiptonReduction]: Checked pairs total: 269609 [2023-08-24 13:03:24,227 INFO L136 LiptonReduction]: Total number of compositions: 338 [2023-08-24 13:03:24,228 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 13:03:24,229 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;@1914b473, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 13:03:24,229 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-24 13:03:24,233 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 13:03:24,233 INFO L124 PetriNetUnfolderBase]: 9/72 cut-off events. [2023-08-24 13:03:24,233 INFO L125 PetriNetUnfolderBase]: For 4/5 co-relation queries the response was YES. [2023-08-24 13:03:24,233 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:03:24,233 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:03:24,233 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-24 13:03:24,233 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:03:24,233 INFO L85 PathProgramCache]: Analyzing trace with hash 1222021451, now seen corresponding path program 1 times [2023-08-24 13:03:24,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:03:24,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338064606] [2023-08-24 13:03:24,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:03:24,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:03:24,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:03:24,278 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 13:03:24,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:03:24,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338064606] [2023-08-24 13:03:24,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338064606] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 13:03:24,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 13:03:24,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 13:03:24,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857452260] [2023-08-24 13:03:24,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 13:03:24,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 13:03:24,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:03:24,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 13:03:24,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 13:03:24,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 379 out of 786 [2023-08-24 13:03:24,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 160 transitions, 392 flow. Second operand has 3 states, 3 states have (on average 382.0) internal successors, (1146), 3 states have internal predecessors, (1146), 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 13:03:24,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:03:24,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 379 of 786 [2023-08-24 13:03:24,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand