/root/.sdkman/candidates/java/21.0.5-tem/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata ./data -tc ../benchexec/../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../benchexec/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.automaton.type.used.in.concurrency.analysis PETRI_NET -i ../../../trunk/examples/svcomp/goblint-regression/13-privatized_41-traces-ex-7_unknown_1_pos.i -------------------------------------------------------------------------------- This is Ultimate 0.3.0-wip.dk.cfg-lbe-improvements-94356ea-m [2025-04-13 19:40:11,874 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-04-13 19:40:11,918 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../benchexec/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2025-04-13 19:40:11,922 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-04-13 19:40:11,922 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-04-13 19:40:11,947 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-04-13 19:40:11,947 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-04-13 19:40:11,947 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-04-13 19:40:11,948 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-04-13 19:40:11,948 INFO L153 SettingsManager]: * Use memory slicer=true [2025-04-13 19:40:11,949 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-04-13 19:40:11,949 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-04-13 19:40:11,949 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-04-13 19:40:11,949 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-04-13 19:40:11,949 INFO L153 SettingsManager]: * Use SBE=true [2025-04-13 19:40:11,950 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-04-13 19:40:11,950 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-04-13 19:40:11,950 INFO L153 SettingsManager]: * sizeof long=4 [2025-04-13 19:40:11,950 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-04-13 19:40:11,950 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-04-13 19:40:11,950 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-04-13 19:40:11,950 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-04-13 19:40:11,950 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-04-13 19:40:11,950 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-04-13 19:40:11,950 INFO L153 SettingsManager]: * sizeof long double=12 [2025-04-13 19:40:11,950 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-04-13 19:40:11,950 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-04-13 19:40:11,950 INFO L153 SettingsManager]: * Use constant arrays=true [2025-04-13 19:40:11,950 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-04-13 19:40:11,950 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-13 19:40:11,951 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-13 19:40:11,951 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-13 19:40:11,951 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-13 19:40:11,951 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-04-13 19:40:11,951 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-13 19:40:11,951 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-13 19:40:11,951 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-13 19:40:11,951 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-13 19:40:11,951 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-04-13 19:40:11,951 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-04-13 19:40:11,951 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-04-13 19:40:11,951 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-04-13 19:40:11,951 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-04-13 19:40:11,951 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-04-13 19:40:11,952 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-04-13 19:40:11,952 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-04-13 19:40:11,952 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-04-13 19:40:11,952 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Automaton type used in concurrency analysis -> PETRI_NET [2025-04-13 19:40:12,143 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-04-13 19:40:12,149 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-04-13 19:40:12,151 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-04-13 19:40:12,151 INFO L270 PluginConnector]: Initializing CDTParser... [2025-04-13 19:40:12,152 INFO L274 PluginConnector]: CDTParser initialized [2025-04-13 19:40:12,152 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/13-privatized_41-traces-ex-7_unknown_1_pos.i [2025-04-13 19:40:13,472 INFO L538 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8fb86078a/37afcf1aad734bd9bc19f13133802d85/FLAGefda7bbe1 [2025-04-13 19:40:13,747 INFO L389 CDTParser]: Found 1 translation units. [2025-04-13 19:40:13,748 INFO L178 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/13-privatized_41-traces-ex-7_unknown_1_pos.i [2025-04-13 19:40:13,760 INFO L432 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8fb86078a/37afcf1aad734bd9bc19f13133802d85/FLAGefda7bbe1 [2025-04-13 19:40:14,522 INFO L440 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8fb86078a/37afcf1aad734bd9bc19f13133802d85 [2025-04-13 19:40:14,524 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-04-13 19:40:14,525 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2025-04-13 19:40:14,526 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-04-13 19:40:14,526 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-04-13 19:40:14,529 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-04-13 19:40:14,530 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.04 07:40:14" (1/1) ... [2025-04-13 19:40:14,530 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f077c2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:40:14, skipping insertion in model container [2025-04-13 19:40:14,530 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.04 07:40:14" (1/1) ... [2025-04-13 19:40:14,555 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-04-13 19:40:14,707 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/13-privatized_41-traces-ex-7_unknown_1_pos.i[1097,1110] [2025-04-13 19:40:14,828 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-04-13 19:40:14,839 INFO L200 MainTranslator]: Completed pre-run [2025-04-13 19:40:14,854 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/13-privatized_41-traces-ex-7_unknown_1_pos.i[1097,1110] [2025-04-13 19:40:14,876 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-04-13 19:40:14,909 INFO L204 MainTranslator]: Completed translation [2025-04-13 19:40:14,909 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:40:14 WrapperNode [2025-04-13 19:40:14,909 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-04-13 19:40:14,910 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-04-13 19:40:14,910 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-04-13 19:40:14,910 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-04-13 19:40:14,914 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:40:14" (1/1) ... [2025-04-13 19:40:14,931 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:40:14" (1/1) ... [2025-04-13 19:40:14,946 INFO L138 Inliner]: procedures = 162, calls = 27, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 47 [2025-04-13 19:40:14,946 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-04-13 19:40:14,947 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-04-13 19:40:14,947 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-04-13 19:40:14,947 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-04-13 19:40:14,951 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:40:14" (1/1) ... [2025-04-13 19:40:14,952 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:40:14" (1/1) ... [2025-04-13 19:40:14,955 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:40:14" (1/1) ... [2025-04-13 19:40:14,969 INFO L175 MemorySlicer]: Split 12 memory accesses to 3 slices as follows [2, 5, 5]. 42 percent of accesses are in the largest equivalence class. The 12 initializations are split as follows [2, 5, 5]. The 0 writes are split as follows [0, 0, 0]. [2025-04-13 19:40:14,969 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:40:14" (1/1) ... [2025-04-13 19:40:14,969 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:40:14" (1/1) ... [2025-04-13 19:40:14,974 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:40:14" (1/1) ... [2025-04-13 19:40:14,975 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:40:14" (1/1) ... [2025-04-13 19:40:14,976 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:40:14" (1/1) ... [2025-04-13 19:40:14,976 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:40:14" (1/1) ... [2025-04-13 19:40:14,981 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:40:14" (1/1) ... [2025-04-13 19:40:14,983 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-04-13 19:40:14,988 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-04-13 19:40:14,988 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-04-13 19:40:14,988 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-04-13 19:40:14,988 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:40:14" (1/1) ... [2025-04-13 19:40:14,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-13 19:40:15,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 19:40:15,013 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-04-13 19:40:15,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-04-13 19:40:15,031 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2025-04-13 19:40:15,031 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-04-13 19:40:15,031 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2025-04-13 19:40:15,031 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2025-04-13 19:40:15,031 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-04-13 19:40:15,031 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-04-13 19:40:15,031 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-04-13 19:40:15,031 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2025-04-13 19:40:15,032 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-04-13 19:40:15,032 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-04-13 19:40:15,032 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-04-13 19:40:15,124 INFO L234 CfgBuilder]: Building ICFG [2025-04-13 19:40:15,125 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-04-13 19:40:15,224 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-04-13 19:40:15,225 INFO L289 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-04-13 19:40:15,225 INFO L294 CfgBuilder]: Performing block encoding [2025-04-13 19:40:15,338 INFO L313 CfgBuilder]: Removed 0 assume(true) statements. [2025-04-13 19:40:15,339 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.04 07:40:15 BoogieIcfgContainer [2025-04-13 19:40:15,339 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-04-13 19:40:15,341 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-04-13 19:40:15,341 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-04-13 19:40:15,344 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-04-13 19:40:15,344 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.04 07:40:14" (1/3) ... [2025-04-13 19:40:15,344 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7edb2446 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.04 07:40:15, skipping insertion in model container [2025-04-13 19:40:15,344 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:40:14" (2/3) ... [2025-04-13 19:40:15,345 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7edb2446 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.04 07:40:15, skipping insertion in model container [2025-04-13 19:40:15,345 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.04 07:40:15" (3/3) ... [2025-04-13 19:40:15,345 INFO L128 eAbstractionObserver]: Analyzing ICFG 13-privatized_41-traces-ex-7_unknown_1_pos.i [2025-04-13 19:40:15,355 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-04-13 19:40:15,356 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG 13-privatized_41-traces-ex-7_unknown_1_pos.i that has 2 procedures, 21 locations, 19 edges, 1 initial locations, 0 loop locations, and 1 error locations. [2025-04-13 19:40:15,356 INFO L490 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-04-13 19:40:15,383 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2025-04-13 19:40:15,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 24 places, 20 transitions, 44 flow [2025-04-13 19:40:15,424 INFO L116 PetriNetUnfolderBase]: 0/19 cut-off events. [2025-04-13 19:40:15,426 INFO L117 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-04-13 19:40:15,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23 conditions, 19 events. 0/19 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 16 event pairs, 0 based on Foata normal form. 0/18 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2025-04-13 19:40:15,427 INFO L82 GeneralOperation]: Start removeDead. Operand has 24 places, 20 transitions, 44 flow [2025-04-13 19:40:15,429 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 22 places, 18 transitions, 39 flow [2025-04-13 19:40:15,434 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-04-13 19:40:15,442 INFO L340 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, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@4c936120, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-04-13 19:40:15,443 INFO L341 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2025-04-13 19:40:15,447 INFO L177 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-04-13 19:40:15,448 INFO L116 PetriNetUnfolderBase]: 0/14 cut-off events. [2025-04-13 19:40:15,448 INFO L117 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-04-13 19:40:15,448 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 19:40:15,448 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 19:40:15,449 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 19:40:15,452 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 19:40:15,452 INFO L85 PathProgramCache]: Analyzing trace with hash 496260877, now seen corresponding path program 1 times [2025-04-13 19:40:15,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 19:40:15,461 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288983552] [2025-04-13 19:40:15,461 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 19:40:15,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 19:40:15,543 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-04-13 19:40:15,562 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-04-13 19:40:15,563 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 19:40:15,563 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 19:40:15,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 19:40:15,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 19:40:15,747 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288983552] [2025-04-13 19:40:15,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288983552] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 19:40:15,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 19:40:15,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-04-13 19:40:15,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913502578] [2025-04-13 19:40:15,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 19:40:15,755 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-04-13 19:40:15,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 19:40:15,772 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-04-13 19:40:15,772 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-04-13 19:40:15,773 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 20 [2025-04-13 19:40:15,776 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 18 transitions, 39 flow. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 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) [2025-04-13 19:40:15,776 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 19:40:15,776 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 20 [2025-04-13 19:40:15,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 19:40:15,832 INFO L116 PetriNetUnfolderBase]: 27/80 cut-off events. [2025-04-13 19:40:15,832 INFO L117 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-04-13 19:40:15,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152 conditions, 80 events. 27/80 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 234 event pairs, 11 based on Foata normal form. 3/81 useless extension candidates. Maximal degree in co-relation 143. Up to 44 conditions per place. [2025-04-13 19:40:15,834 INFO L140 encePairwiseOnDemand]: 17/20 looper letters, 15 selfloop transitions, 2 changer transitions 0/22 dead transitions. [2025-04-13 19:40:15,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 22 transitions, 81 flow [2025-04-13 19:40:15,836 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-04-13 19:40:15,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-04-13 19:40:15,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 36 transitions. [2025-04-13 19:40:15,843 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.6 [2025-04-13 19:40:15,844 INFO L175 Difference]: Start difference. First operand has 22 places, 18 transitions, 39 flow. Second operand 3 states and 36 transitions. [2025-04-13 19:40:15,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 22 transitions, 81 flow [2025-04-13 19:40:15,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 22 transitions, 80 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-04-13 19:40:15,852 INFO L231 Difference]: Finished difference. Result has 24 places, 18 transitions, 46 flow [2025-04-13 19:40:15,854 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=46, PETRI_PLACES=24, PETRI_TRANSITIONS=18} [2025-04-13 19:40:15,857 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 2 predicate places. [2025-04-13 19:40:15,857 INFO L485 AbstractCegarLoop]: Abstraction has has 24 places, 18 transitions, 46 flow [2025-04-13 19:40:15,857 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 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) [2025-04-13 19:40:15,857 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 19:40:15,857 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 19:40:15,857 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-04-13 19:40:15,857 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 19:40:15,858 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 19:40:15,858 INFO L85 PathProgramCache]: Analyzing trace with hash 278548366, now seen corresponding path program 1 times [2025-04-13 19:40:15,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 19:40:15,858 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766768088] [2025-04-13 19:40:15,858 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 19:40:15,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 19:40:15,872 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-04-13 19:40:15,884 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-04-13 19:40:15,884 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 19:40:15,884 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 19:40:16,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 19:40:16,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 19:40:16,031 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766768088] [2025-04-13 19:40:16,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766768088] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 19:40:16,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 19:40:16,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-04-13 19:40:16,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118664283] [2025-04-13 19:40:16,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 19:40:16,032 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-04-13 19:40:16,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 19:40:16,032 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-04-13 19:40:16,032 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-04-13 19:40:16,032 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 20 [2025-04-13 19:40:16,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 18 transitions, 46 flow. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 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) [2025-04-13 19:40:16,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 19:40:16,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 20 [2025-04-13 19:40:16,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 19:40:16,074 INFO L116 PetriNetUnfolderBase]: 13/58 cut-off events. [2025-04-13 19:40:16,074 INFO L117 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-04-13 19:40:16,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120 conditions, 58 events. 13/58 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 110 event pairs, 5 based on Foata normal form. 6/63 useless extension candidates. Maximal degree in co-relation 109. Up to 27 conditions per place. [2025-04-13 19:40:16,075 INFO L140 encePairwiseOnDemand]: 15/20 looper letters, 11 selfloop transitions, 5 changer transitions 0/21 dead transitions. [2025-04-13 19:40:16,075 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 21 transitions, 86 flow [2025-04-13 19:40:16,075 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-04-13 19:40:16,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-04-13 19:40:16,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 42 transitions. [2025-04-13 19:40:16,076 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.525 [2025-04-13 19:40:16,076 INFO L175 Difference]: Start difference. First operand has 24 places, 18 transitions, 46 flow. Second operand 4 states and 42 transitions. [2025-04-13 19:40:16,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 21 transitions, 86 flow [2025-04-13 19:40:16,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 21 transitions, 82 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-04-13 19:40:16,077 INFO L231 Difference]: Finished difference. Result has 25 places, 18 transitions, 52 flow [2025-04-13 19:40:16,077 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=52, PETRI_PLACES=25, PETRI_TRANSITIONS=18} [2025-04-13 19:40:16,077 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 3 predicate places. [2025-04-13 19:40:16,077 INFO L485 AbstractCegarLoop]: Abstraction has has 25 places, 18 transitions, 52 flow [2025-04-13 19:40:16,078 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 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) [2025-04-13 19:40:16,078 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 19:40:16,078 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 19:40:16,078 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-04-13 19:40:16,078 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 19:40:16,078 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 19:40:16,078 INFO L85 PathProgramCache]: Analyzing trace with hash -223889266, now seen corresponding path program 2 times [2025-04-13 19:40:16,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 19:40:16,078 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444371421] [2025-04-13 19:40:16,078 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 19:40:16,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 19:40:16,091 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 14 statements into 1 equivalence classes. [2025-04-13 19:40:16,095 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-04-13 19:40:16,096 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-04-13 19:40:16,096 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 19:40:16,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 19:40:16,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 19:40:16,220 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444371421] [2025-04-13 19:40:16,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444371421] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 19:40:16,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 19:40:16,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-04-13 19:40:16,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373590274] [2025-04-13 19:40:16,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 19:40:16,221 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-04-13 19:40:16,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 19:40:16,221 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-04-13 19:40:16,221 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2025-04-13 19:40:16,221 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 20 [2025-04-13 19:40:16,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 18 transitions, 52 flow. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 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) [2025-04-13 19:40:16,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 19:40:16,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 20 [2025-04-13 19:40:16,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 19:40:16,271 INFO L116 PetriNetUnfolderBase]: 10/46 cut-off events. [2025-04-13 19:40:16,271 INFO L117 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2025-04-13 19:40:16,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105 conditions, 46 events. 10/46 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 65 event pairs, 5 based on Foata normal form. 1/44 useless extension candidates. Maximal degree in co-relation 94. Up to 19 conditions per place. [2025-04-13 19:40:16,272 INFO L140 encePairwiseOnDemand]: 16/20 looper letters, 11 selfloop transitions, 4 changer transitions 1/21 dead transitions. [2025-04-13 19:40:16,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 21 transitions, 92 flow [2025-04-13 19:40:16,273 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-04-13 19:40:16,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-04-13 19:40:16,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 41 transitions. [2025-04-13 19:40:16,275 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5125 [2025-04-13 19:40:16,275 INFO L175 Difference]: Start difference. First operand has 25 places, 18 transitions, 52 flow. Second operand 4 states and 41 transitions. [2025-04-13 19:40:16,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 21 transitions, 92 flow [2025-04-13 19:40:16,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 21 transitions, 86 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-04-13 19:40:16,276 INFO L231 Difference]: Finished difference. Result has 26 places, 18 transitions, 55 flow [2025-04-13 19:40:16,276 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=47, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=55, PETRI_PLACES=26, PETRI_TRANSITIONS=18} [2025-04-13 19:40:16,277 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 4 predicate places. [2025-04-13 19:40:16,277 INFO L485 AbstractCegarLoop]: Abstraction has has 26 places, 18 transitions, 55 flow [2025-04-13 19:40:16,277 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 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) [2025-04-13 19:40:16,277 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 19:40:16,277 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 19:40:16,277 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-04-13 19:40:16,277 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 19:40:16,277 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 19:40:16,277 INFO L85 PathProgramCache]: Analyzing trace with hash -934272247, now seen corresponding path program 1 times [2025-04-13 19:40:16,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 19:40:16,278 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031265724] [2025-04-13 19:40:16,278 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 19:40:16,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 19:40:16,288 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-04-13 19:40:16,300 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-04-13 19:40:16,301 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 19:40:16,301 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-13 19:40:16,301 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-04-13 19:40:16,304 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-04-13 19:40:16,311 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-04-13 19:40:16,311 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 19:40:16,311 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-13 19:40:16,327 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-04-13 19:40:16,327 INFO L340 BasicCegarLoop]: Counterexample is feasible [2025-04-13 19:40:16,328 INFO L790 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2025-04-13 19:40:16,329 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2025-04-13 19:40:16,329 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-04-13 19:40:16,329 INFO L422 BasicCegarLoop]: Path program histogram: [2, 1, 1] [2025-04-13 19:40:16,364 INFO L242 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2025-04-13 19:40:16,365 INFO L171 ceAbstractionStarter]: Computing trace abstraction results [2025-04-13 19:40:16,370 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.04 07:40:16 BasicIcfg [2025-04-13 19:40:16,370 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2025-04-13 19:40:16,371 INFO L158 Benchmark]: Toolchain (without parser) took 1845.68ms. Allocated memory is still 125.8MB. Free memory was 86.6MB in the beginning and 67.7MB in the end (delta: 18.9MB). Peak memory consumption was 17.6MB. Max. memory is 8.0GB. [2025-04-13 19:40:16,371 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 155.2MB. Free memory is still 84.5MB. There was no memory consumed. Max. memory is 8.0GB. [2025-04-13 19:40:16,371 INFO L158 Benchmark]: CACSL2BoogieTranslator took 383.63ms. Allocated memory is still 125.8MB. Free memory was 86.6MB in the beginning and 64.2MB in the end (delta: 22.4MB). Peak memory consumption was 16.8MB. Max. memory is 8.0GB. [2025-04-13 19:40:16,371 INFO L158 Benchmark]: Boogie Procedure Inliner took 36.14ms. Allocated memory is still 125.8MB. Free memory was 64.2MB in the beginning and 62.1MB in the end (delta: 2.1MB). Peak memory consumption was 4.2MB. Max. memory is 8.0GB. [2025-04-13 19:40:16,371 INFO L158 Benchmark]: Boogie Preprocessor took 36.38ms. Allocated memory is still 125.8MB. Free memory was 62.1MB in the beginning and 60.7MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 8.0GB. [2025-04-13 19:40:16,371 INFO L158 Benchmark]: RCFGBuilder took 351.66ms. Allocated memory is still 125.8MB. Free memory was 60.7MB in the beginning and 32.8MB in the end (delta: 28.0MB). Peak memory consumption was 29.4MB. Max. memory is 8.0GB. [2025-04-13 19:40:16,372 INFO L158 Benchmark]: TraceAbstraction took 1029.67ms. Allocated memory is still 125.8MB. Free memory was 32.1MB in the beginning and 67.7MB in the end (delta: -35.6MB). There was no memory consumed. Max. memory is 8.0GB. [2025-04-13 19:40:16,372 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 155.2MB. Free memory is still 84.5MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 383.63ms. Allocated memory is still 125.8MB. Free memory was 86.6MB in the beginning and 64.2MB in the end (delta: 22.4MB). Peak memory consumption was 16.8MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 36.14ms. Allocated memory is still 125.8MB. Free memory was 64.2MB in the beginning and 62.1MB in the end (delta: 2.1MB). Peak memory consumption was 4.2MB. Max. memory is 8.0GB. * Boogie Preprocessor took 36.38ms. Allocated memory is still 125.8MB. Free memory was 62.1MB in the beginning and 60.7MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 8.0GB. * RCFGBuilder took 351.66ms. Allocated memory is still 125.8MB. Free memory was 60.7MB in the beginning and 32.8MB in the end (delta: 28.0MB). Peak memory consumption was 29.4MB. Max. memory is 8.0GB. * TraceAbstraction took 1029.67ms. Allocated memory is still 125.8MB. Free memory was 32.1MB in the beginning and 67.7MB in the end (delta: -35.6MB). There was no memory consumed. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 19]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L681] 0 int g = 0; [L682] 0 pthread_mutex_t A = { { 0, 0, 0, PTHREAD_MUTEX_TIMED_NP, 0, { { 0, 0 } } } }; [L682] 0 pthread_mutex_t A = { { 0, 0, 0, PTHREAD_MUTEX_TIMED_NP, 0, { { 0, 0 } } } }; [L682] 0 pthread_mutex_t A = { { 0, 0, 0, PTHREAD_MUTEX_TIMED_NP, 0, { { 0, 0 } } } }; [L682] 0 pthread_mutex_t A = { { 0, 0, 0, PTHREAD_MUTEX_TIMED_NP, 0, { { 0, 0 } } } }; [L682] 0 pthread_mutex_t A = { { 0, 0, 0, PTHREAD_MUTEX_TIMED_NP, 0, { { 0, 0 } } } }; [L682] 0 pthread_mutex_t A = { { 0, 0, 0, PTHREAD_MUTEX_TIMED_NP, 0, { { 0, 0 } } } }; [L683] 0 pthread_mutex_t D = { { 0, 0, 0, PTHREAD_MUTEX_TIMED_NP, 0, { { 0, 0 } } } }; [L683] 0 pthread_mutex_t D = { { 0, 0, 0, PTHREAD_MUTEX_TIMED_NP, 0, { { 0, 0 } } } }; [L683] 0 pthread_mutex_t D = { { 0, 0, 0, PTHREAD_MUTEX_TIMED_NP, 0, { { 0, 0 } } } }; [L683] 0 pthread_mutex_t D = { { 0, 0, 0, PTHREAD_MUTEX_TIMED_NP, 0, { { 0, 0 } } } }; [L683] 0 pthread_mutex_t D = { { 0, 0, 0, PTHREAD_MUTEX_TIMED_NP, 0, { { 0, 0 } } } }; [L683] 0 pthread_mutex_t D = { { 0, 0, 0, PTHREAD_MUTEX_TIMED_NP, 0, { { 0, 0 } } } }; [L693] 0 pthread_t id; [L694] FCALL, FORK 0 pthread_create(&id, ((void *)0), t_fun, ((void *)0)) VAL [A={3:0}, D={4:0}, \at(arg, Pre)={0:0}, g=0, id=-1] [L687] 1 g = 17 VAL [A={3:0}, D={4:0}, \at(arg, Pre)={0:0}, arg={0:0}, g=17] [L698] CALL 0 __VERIFIER_assert(g == 0) [L19] COND TRUE 0 !(cond) [L19] 0 reach_error() VAL [A={3:0}, D={4:0}, \at(arg, Pre)={0:0}, \at(cond, Pre)=0, arg={0:0}, cond=0, g=17] - UnprovableResult [Line: 694]: Unable to prove that petrification did provide enough thread instances (tool internal message) Unable to prove that petrification did provide enough thread instances (tool internal message) Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 3 procedures, 32 locations, 30 edges, 2 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 0.9s, OverallIterations: 4, TraceHistogramMax: 1, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 18 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 18 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 6 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 76 IncrementalHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 6 mSolverCounterUnsat, 0 mSDtfsCounter, 76 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=55occurred in iteration=3, InterpolantAutomatonStates: 11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 54 NumberOfCodeBlocks, 54 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 34 ConstructedInterpolants, 0 QuantifiedInterpolants, 174 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available, ConComCheckerStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2025-04-13 19:40:16,387 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request...