/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_IcfgBuilder.xml -s ../benchexec/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.automaton.type.used.in.concurrency.analysis PETRI_NET --preprocessor.replace.while.statements.and.if-then-else.statements false -i ../../../trunk/examples/svcomp/pthread-theta/unwind1-nondet.i -------------------------------------------------------------------------------- This is Ultimate 0.3.0-wip.dk.cfg-lbe-improvements-94356ea-m [2025-04-14 01:46:59,037 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-04-14 01:46:59,091 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 [2025-04-14 01:46:59,096 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-04-14 01:46:59,096 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-04-14 01:46:59,111 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-04-14 01:46:59,111 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-04-14 01:46:59,111 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-04-14 01:46:59,111 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-04-14 01:46:59,112 INFO L153 SettingsManager]: * Use memory slicer=true [2025-04-14 01:46:59,112 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-04-14 01:46:59,112 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-04-14 01:46:59,112 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-04-14 01:46:59,112 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-04-14 01:46:59,112 INFO L153 SettingsManager]: * Use SBE=true [2025-04-14 01:46:59,112 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-04-14 01:46:59,112 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-04-14 01:46:59,112 INFO L153 SettingsManager]: * sizeof long=4 [2025-04-14 01:46:59,112 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-04-14 01:46:59,112 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-04-14 01:46:59,112 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-04-14 01:46:59,112 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-04-14 01:46:59,113 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-04-14 01:46:59,113 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-04-14 01:46:59,113 INFO L153 SettingsManager]: * sizeof long double=12 [2025-04-14 01:46:59,113 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-04-14 01:46:59,113 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-04-14 01:46:59,113 INFO L153 SettingsManager]: * Use constant arrays=true [2025-04-14 01:46:59,113 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-04-14 01:46:59,113 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-14 01:46:59,113 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-14 01:46:59,113 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-14 01:46:59,113 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-14 01:46:59,113 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-04-14 01:46:59,113 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-14 01:46:59,113 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-14 01:46:59,113 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-14 01:46:59,113 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-14 01:46:59,114 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-04-14 01:46:59,114 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-04-14 01:46:59,114 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-04-14 01:46:59,114 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-04-14 01:46:59,114 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-04-14 01:46:59,114 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-04-14 01:46:59,114 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-04-14 01:46:59,114 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-04-14 01:46:59,114 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-04-14 01:46:59,114 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 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.preprocessor: Replace while statements and if-then-else statements -> false [2025-04-14 01:46:59,313 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-04-14 01:46:59,321 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-04-14 01:46:59,322 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-04-14 01:46:59,323 INFO L270 PluginConnector]: Initializing CDTParser... [2025-04-14 01:46:59,323 INFO L274 PluginConnector]: CDTParser initialized [2025-04-14 01:46:59,324 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-theta/unwind1-nondet.i [2025-04-14 01:47:00,537 INFO L538 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/593653084/6b50a2a665984b7bb0596c31ec0cf6ba/FLAG782b1bf31 [2025-04-14 01:47:00,760 INFO L389 CDTParser]: Found 1 translation units. [2025-04-14 01:47:00,760 INFO L178 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-theta/unwind1-nondet.i [2025-04-14 01:47:00,770 INFO L432 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/593653084/6b50a2a665984b7bb0596c31ec0cf6ba/FLAG782b1bf31 [2025-04-14 01:47:01,538 INFO L440 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/593653084/6b50a2a665984b7bb0596c31ec0cf6ba [2025-04-14 01:47:01,540 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-04-14 01:47:01,542 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2025-04-14 01:47:01,543 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-04-14 01:47:01,544 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-04-14 01:47:01,547 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-04-14 01:47:01,547 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.04 01:47:01" (1/1) ... [2025-04-14 01:47:01,548 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@268bed0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 01:47:01, skipping insertion in model container [2025-04-14 01:47:01,548 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.04 01:47:01" (1/1) ... [2025-04-14 01:47:01,575 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-04-14 01:47:01,827 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-theta/unwind1-nondet.i[33026,33039] [2025-04-14 01:47:01,842 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-04-14 01:47:01,850 INFO L200 MainTranslator]: Completed pre-run [2025-04-14 01:47:01,882 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-theta/unwind1-nondet.i[33026,33039] [2025-04-14 01:47:01,885 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-04-14 01:47:01,917 INFO L204 MainTranslator]: Completed translation [2025-04-14 01:47:01,918 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 01:47:01 WrapperNode [2025-04-14 01:47:01,918 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-04-14 01:47:01,918 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-04-14 01:47:01,919 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-04-14 01:47:01,919 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-04-14 01:47:01,922 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 01:47:01" (1/1) ... [2025-04-14 01:47:01,931 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 01:47:01" (1/1) ... [2025-04-14 01:47:01,945 INFO L138 Inliner]: procedures = 169, calls = 10, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 54 [2025-04-14 01:47:01,946 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-04-14 01:47:01,946 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-04-14 01:47:01,946 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-04-14 01:47:01,946 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-04-14 01:47:01,952 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 01:47:01" (1/1) ... [2025-04-14 01:47:01,952 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 01:47:01" (1/1) ... [2025-04-14 01:47:01,958 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 01:47:01" (1/1) ... [2025-04-14 01:47:01,973 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2025-04-14 01:47:01,974 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 01:47:01" (1/1) ... [2025-04-14 01:47:01,974 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 01:47:01" (1/1) ... [2025-04-14 01:47:01,977 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 01:47:01" (1/1) ... [2025-04-14 01:47:01,977 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 01:47:01" (1/1) ... [2025-04-14 01:47:01,978 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 01:47:01" (1/1) ... [2025-04-14 01:47:01,978 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 01:47:01" (1/1) ... [2025-04-14 01:47:01,981 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-04-14 01:47:01,981 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-04-14 01:47:01,981 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-04-14 01:47:01,981 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-04-14 01:47:01,982 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 01:47:01" (1/1) ... [2025-04-14 01:47:01,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-14 01:47:01,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:47:02,006 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) [2025-04-14 01:47:02,009 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 [2025-04-14 01:47:02,024 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-04-14 01:47:02,024 INFO L130 BoogieDeclarations]: Found specification of procedure f1 [2025-04-14 01:47:02,024 INFO L138 BoogieDeclarations]: Found implementation of procedure f1 [2025-04-14 01:47:02,024 INFO L130 BoogieDeclarations]: Found specification of procedure f2 [2025-04-14 01:47:02,024 INFO L138 BoogieDeclarations]: Found implementation of procedure f2 [2025-04-14 01:47:02,024 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-04-14 01:47:02,024 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-04-14 01:47:02,024 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-04-14 01:47:02,025 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-04-14 01:47:02,105 INFO L256 CfgBuilder]: Building ICFG [2025-04-14 01:47:02,106 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-04-14 01:47:02,200 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-04-14 01:47:02,200 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-04-14 01:47:02,200 INFO L318 CfgBuilder]: Performing block encoding [2025-04-14 01:47:02,293 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-04-14 01:47:02,294 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 14.04 01:47:02 BoogieIcfgContainer [2025-04-14 01:47:02,294 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-04-14 01:47:02,295 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-04-14 01:47:02,295 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-04-14 01:47:02,298 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-04-14 01:47:02,299 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.04 01:47:01" (1/3) ... [2025-04-14 01:47:02,299 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39273c85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.04 01:47:02, skipping insertion in model container [2025-04-14 01:47:02,299 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 01:47:01" (2/3) ... [2025-04-14 01:47:02,299 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39273c85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.04 01:47:02, skipping insertion in model container [2025-04-14 01:47:02,299 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 14.04 01:47:02" (3/3) ... [2025-04-14 01:47:02,300 INFO L128 eAbstractionObserver]: Analyzing ICFG unwind1-nondet.i [2025-04-14 01:47:02,309 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-04-14 01:47:02,310 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG unwind1-nondet.i that has 3 procedures, 18 locations, 17 edges, 1 initial locations, 1 loop locations, and 1 error locations. [2025-04-14 01:47:02,310 INFO L490 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-04-14 01:47:02,339 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-04-14 01:47:02,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 24 places, 19 transitions, 52 flow [2025-04-14 01:47:02,386 INFO L116 PetriNetUnfolderBase]: 2/17 cut-off events. [2025-04-14 01:47:02,388 INFO L117 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-04-14 01:47:02,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26 conditions, 17 events. 2/17 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 18 event pairs, 0 based on Foata normal form. 0/14 useless extension candidates. Maximal degree in co-relation 14. Up to 2 conditions per place. [2025-04-14 01:47:02,390 INFO L82 GeneralOperation]: Start removeDead. Operand has 24 places, 19 transitions, 52 flow [2025-04-14 01:47:02,392 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 20 places, 15 transitions, 39 flow [2025-04-14 01:47:02,402 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-04-14 01:47:02,412 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;@712d20b6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-04-14 01:47:02,413 INFO L341 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2025-04-14 01:47:02,420 INFO L177 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-04-14 01:47:02,420 INFO L116 PetriNetUnfolderBase]: 2/12 cut-off events. [2025-04-14 01:47:02,420 INFO L117 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2025-04-14 01:47:02,421 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:47:02,422 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2025-04-14 01:47:02,423 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting f2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2025-04-14 01:47:02,426 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:47:02,426 INFO L85 PathProgramCache]: Analyzing trace with hash 818704363, now seen corresponding path program 1 times [2025-04-14 01:47:02,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:47:02,434 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773261486] [2025-04-14 01:47:02,435 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-14 01:47:02,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:47:02,496 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-04-14 01:47:02,515 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-04-14 01:47:02,516 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 01:47:02,516 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:47:02,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:47:02,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:47:02,717 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773261486] [2025-04-14 01:47:02,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773261486] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-14 01:47:02,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-14 01:47:02,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-04-14 01:47:02,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827256117] [2025-04-14 01:47:02,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-14 01:47:02,725 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-04-14 01:47:02,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:47:02,744 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-04-14 01:47:02,744 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-04-14 01:47:02,745 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 01:47:02,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 39 flow. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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) [2025-04-14 01:47:02,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:47:02,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 01:47:02,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:47:02,858 INFO L116 PetriNetUnfolderBase]: 102/168 cut-off events. [2025-04-14 01:47:02,859 INFO L117 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2025-04-14 01:47:02,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 357 conditions, 168 events. 102/168 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 463 event pairs, 40 based on Foata normal form. 0/123 useless extension candidates. Maximal degree in co-relation 320. Up to 103 conditions per place. [2025-04-14 01:47:02,861 INFO L140 encePairwiseOnDemand]: 14/19 looper letters, 19 selfloop transitions, 3 changer transitions 2/24 dead transitions. [2025-04-14 01:47:02,861 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 24 transitions, 108 flow [2025-04-14 01:47:02,863 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-04-14 01:47:02,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-04-14 01:47:02,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 33 transitions. [2025-04-14 01:47:02,872 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.4342105263157895 [2025-04-14 01:47:02,873 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 39 flow. Second operand 4 states and 33 transitions. [2025-04-14 01:47:02,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 24 transitions, 108 flow [2025-04-14 01:47:02,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 24 transitions, 101 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-04-14 01:47:02,881 INFO L231 Difference]: Finished difference. Result has 21 places, 15 transitions, 46 flow [2025-04-14 01:47:02,883 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=46, PETRI_PLACES=21, PETRI_TRANSITIONS=15} [2025-04-14 01:47:02,886 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 1 predicate places. [2025-04-14 01:47:02,886 INFO L485 AbstractCegarLoop]: Abstraction has has 21 places, 15 transitions, 46 flow [2025-04-14 01:47:02,887 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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) [2025-04-14 01:47:02,887 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:47:02,887 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:47:02,887 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-04-14 01:47:02,887 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting f2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2025-04-14 01:47:02,888 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:47:02,888 INFO L85 PathProgramCache]: Analyzing trace with hash -389968390, now seen corresponding path program 1 times [2025-04-14 01:47:02,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:47:02,888 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130889162] [2025-04-14 01:47:02,888 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-14 01:47:02,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:47:02,898 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-04-14 01:47:02,901 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-04-14 01:47:02,901 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 01:47:02,901 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:47:02,973 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:47:02,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:47:02,973 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130889162] [2025-04-14 01:47:02,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130889162] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-14 01:47:02,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-14 01:47:02,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-04-14 01:47:02,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162780041] [2025-04-14 01:47:02,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-14 01:47:02,974 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-04-14 01:47:02,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:47:02,975 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-04-14 01:47:02,975 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-04-14 01:47:02,975 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 01:47:02,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 15 transitions, 46 flow. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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) [2025-04-14 01:47:02,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:47:02,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 01:47:02,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:47:03,054 INFO L116 PetriNetUnfolderBase]: 47/95 cut-off events. [2025-04-14 01:47:03,054 INFO L117 PetriNetUnfolderBase]: For 37/37 co-relation queries the response was YES. [2025-04-14 01:47:03,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 237 conditions, 95 events. 47/95 cut-off events. For 37/37 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 243 event pairs, 15 based on Foata normal form. 11/95 useless extension candidates. Maximal degree in co-relation 133. Up to 55 conditions per place. [2025-04-14 01:47:03,055 INFO L140 encePairwiseOnDemand]: 14/19 looper letters, 15 selfloop transitions, 3 changer transitions 9/27 dead transitions. [2025-04-14 01:47:03,055 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 27 transitions, 130 flow [2025-04-14 01:47:03,057 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-04-14 01:47:03,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-04-14 01:47:03,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 38 transitions. [2025-04-14 01:47:03,057 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.4 [2025-04-14 01:47:03,057 INFO L175 Difference]: Start difference. First operand has 21 places, 15 transitions, 46 flow. Second operand 5 states and 38 transitions. [2025-04-14 01:47:03,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 27 transitions, 130 flow [2025-04-14 01:47:03,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 27 transitions, 123 flow, removed 1 selfloop flow, removed 2 redundant places. [2025-04-14 01:47:03,059 INFO L231 Difference]: Finished difference. Result has 25 places, 15 transitions, 55 flow [2025-04-14 01:47:03,059 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=55, PETRI_PLACES=25, PETRI_TRANSITIONS=15} [2025-04-14 01:47:03,059 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 5 predicate places. [2025-04-14 01:47:03,059 INFO L485 AbstractCegarLoop]: Abstraction has has 25 places, 15 transitions, 55 flow [2025-04-14 01:47:03,059 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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) [2025-04-14 01:47:03,059 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:47:03,059 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:47:03,060 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-04-14 01:47:03,060 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting f2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2025-04-14 01:47:03,060 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:47:03,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1197365778, now seen corresponding path program 1 times [2025-04-14 01:47:03,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:47:03,060 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253330899] [2025-04-14 01:47:03,060 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-14 01:47:03,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:47:03,072 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-04-14 01:47:03,080 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-04-14 01:47:03,080 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 01:47:03,080 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:47:03,164 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:47:03,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:47:03,165 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253330899] [2025-04-14 01:47:03,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253330899] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:47:03,165 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162185405] [2025-04-14 01:47:03,165 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-14 01:47:03,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:47:03,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:47:03,168 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) [2025-04-14 01:47:03,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-04-14 01:47:03,209 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-04-14 01:47:03,222 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-04-14 01:47:03,222 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 01:47:03,222 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:47:03,224 INFO L256 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-04-14 01:47:03,226 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:47:03,250 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:47:03,250 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:47:03,273 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:47:03,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162185405] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:47:03,273 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:47:03,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2025-04-14 01:47:03,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484019555] [2025-04-14 01:47:03,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:47:03,274 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-04-14 01:47:03,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:47:03,274 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-04-14 01:47:03,274 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-04-14 01:47:03,274 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 01:47:03,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 15 transitions, 55 flow. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 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) [2025-04-14 01:47:03,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:47:03,275 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 01:47:03,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:47:03,367 INFO L116 PetriNetUnfolderBase]: 53/109 cut-off events. [2025-04-14 01:47:03,367 INFO L117 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2025-04-14 01:47:03,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 312 conditions, 109 events. 53/109 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 294 event pairs, 21 based on Foata normal form. 0/100 useless extension candidates. Maximal degree in co-relation 190. Up to 51 conditions per place. [2025-04-14 01:47:03,368 INFO L140 encePairwiseOnDemand]: 14/19 looper letters, 14 selfloop transitions, 2 changer transitions 13/29 dead transitions. [2025-04-14 01:47:03,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 29 transitions, 156 flow [2025-04-14 01:47:03,374 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-04-14 01:47:03,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-04-14 01:47:03,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 39 transitions. [2025-04-14 01:47:03,375 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.4105263157894737 [2025-04-14 01:47:03,375 INFO L175 Difference]: Start difference. First operand has 25 places, 15 transitions, 55 flow. Second operand 5 states and 39 transitions. [2025-04-14 01:47:03,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 29 transitions, 156 flow [2025-04-14 01:47:03,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 29 transitions, 142 flow, removed 4 selfloop flow, removed 4 redundant places. [2025-04-14 01:47:03,377 INFO L231 Difference]: Finished difference. Result has 26 places, 13 transitions, 52 flow [2025-04-14 01:47:03,377 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=45, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=52, PETRI_PLACES=26, PETRI_TRANSITIONS=13} [2025-04-14 01:47:03,377 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 6 predicate places. [2025-04-14 01:47:03,377 INFO L485 AbstractCegarLoop]: Abstraction has has 26 places, 13 transitions, 52 flow [2025-04-14 01:47:03,377 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 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) [2025-04-14 01:47:03,378 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:47:03,378 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:47:03,384 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-04-14 01:47:03,582 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:47:03,582 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting f2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2025-04-14 01:47:03,582 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:47:03,583 INFO L85 PathProgramCache]: Analyzing trace with hash 2084899250, now seen corresponding path program 1 times [2025-04-14 01:47:03,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:47:03,583 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806733881] [2025-04-14 01:47:03,583 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-14 01:47:03,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:47:03,587 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-04-14 01:47:03,590 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-04-14 01:47:03,590 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 01:47:03,590 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-14 01:47:03,591 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-04-14 01:47:03,592 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-04-14 01:47:03,595 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-04-14 01:47:03,595 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 01:47:03,595 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-14 01:47:03,610 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-04-14 01:47:03,610 INFO L340 BasicCegarLoop]: Counterexample is feasible [2025-04-14 01:47:03,610 INFO L790 garLoopResultBuilder]: Registering result UNSAFE for location f2Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2025-04-14 01:47:03,612 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2025-04-14 01:47:03,612 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2025-04-14 01:47:03,612 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location f2Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2025-04-14 01:47:03,612 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-04-14 01:47:03,612 INFO L422 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2025-04-14 01:47:03,640 INFO L242 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2025-04-14 01:47:03,640 INFO L171 ceAbstractionStarter]: Computing trace abstraction results [2025-04-14 01:47:03,643 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.04 01:47:03 BasicIcfg [2025-04-14 01:47:03,643 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2025-04-14 01:47:03,643 INFO L158 Benchmark]: Toolchain (without parser) took 2102.03ms. Allocated memory is still 155.2MB. Free memory was 107.9MB in the beginning and 51.1MB in the end (delta: 56.8MB). Peak memory consumption was 57.7MB. Max. memory is 8.0GB. [2025-04-14 01:47:03,644 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 155.2MB. Free memory is still 83.4MB. There was no memory consumed. Max. memory is 8.0GB. [2025-04-14 01:47:03,644 INFO L158 Benchmark]: CACSL2BoogieTranslator took 375.70ms. Allocated memory is still 155.2MB. Free memory was 107.9MB in the beginning and 85.2MB in the end (delta: 22.7MB). Peak memory consumption was 25.2MB. Max. memory is 8.0GB. [2025-04-14 01:47:03,644 INFO L158 Benchmark]: Boogie Procedure Inliner took 27.12ms. Allocated memory is still 155.2MB. Free memory was 85.2MB in the beginning and 83.1MB in the end (delta: 2.0MB). There was no memory consumed. Max. memory is 8.0GB. [2025-04-14 01:47:03,644 INFO L158 Benchmark]: Boogie Preprocessor took 34.68ms. Allocated memory is still 155.2MB. Free memory was 83.1MB in the beginning and 81.8MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 8.0GB. [2025-04-14 01:47:03,644 INFO L158 Benchmark]: IcfgBuilder took 312.68ms. Allocated memory is still 155.2MB. Free memory was 81.7MB in the beginning and 58.7MB in the end (delta: 23.0MB). Peak memory consumption was 25.2MB. Max. memory is 8.0GB. [2025-04-14 01:47:03,644 INFO L158 Benchmark]: TraceAbstraction took 1347.90ms. Allocated memory is still 155.2MB. Free memory was 58.0MB in the beginning and 51.1MB in the end (delta: 6.9MB). Peak memory consumption was 7.3MB. Max. memory is 8.0GB. [2025-04-14 01:47:03,645 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 155.2MB. Free memory is still 83.4MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 375.70ms. Allocated memory is still 155.2MB. Free memory was 107.9MB in the beginning and 85.2MB in the end (delta: 22.7MB). Peak memory consumption was 25.2MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 27.12ms. Allocated memory is still 155.2MB. Free memory was 85.2MB in the beginning and 83.1MB in the end (delta: 2.0MB). There was no memory consumed. Max. memory is 8.0GB. * Boogie Preprocessor took 34.68ms. Allocated memory is still 155.2MB. Free memory was 83.1MB in the beginning and 81.8MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 8.0GB. * IcfgBuilder took 312.68ms. Allocated memory is still 155.2MB. Free memory was 81.7MB in the beginning and 58.7MB in the end (delta: 23.0MB). Peak memory consumption was 25.2MB. Max. memory is 8.0GB. * TraceAbstraction took 1347.90ms. Allocated memory is still 155.2MB. Free memory was 58.0MB in the beginning and 51.1MB in the end (delta: 6.9MB). Peak memory consumption was 7.3MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 753]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L754] 0 int _N; [L755] 0 atomic_int limit; [L772] 0 _N = __VERIFIER_nondet_int() [L773] CALL 0 assume_abort_if_not(0 <= _N && _N <= 0x7fffffff - 1) [L750] COND FALSE 0 !(!cond) [L773] RET 0 assume_abort_if_not(0 <= _N && _N <= 0x7fffffff - 1) [L774] 0 pthread_t t1, t2; [L775] FCALL, FORK 0 pthread_create(&t1, 0, f1, 0) VAL [\at(arg, Pre)={0:0}, _N=0, limit=0, t1=-1] [L757] COND FALSE 1 !(__VERIFIER_nondet_int()) [L776] FCALL, FORK 0 pthread_create(&t2, 0, f2, 0) VAL [\at(arg, Pre)={0:0}, _N=0, arg={0:0}, limit=0, t1=-1, t2=0] [L760] 1 limit = _N + 1 VAL [\at(arg, Pre)={0:0}, _N=0, arg={0:0}, limit=1] [L765] 2 int i, bound; [L766] 2 bound = limit [L767] 2 i = 0 VAL [\at(arg, Pre)={0:0}, \at(arg, Pre)={0:0}, _N=0, arg={0:0}, arg={0:0}, bound=1, i=0, limit=1] [L767] COND TRUE 2 i < bound [L767] 2 i++ VAL [\at(arg, Pre)={0:0}, \at(arg, Pre)={0:0}, _N=0, arg={0:0}, arg={0:0}, bound=1, i=1, limit=1] [L767] COND FALSE 2 !(i < bound) [L768] CALL 2 __VERIFIER_assert(i <= _N) [L753] COND TRUE 2 !expression [L753] 2 reach_error() VAL [\at(arg, Pre)={0:0}, \at(expression, Pre)=0, _N=0, arg={0:0}, expression=0, limit=1] - UnprovableResult [Line: 775]: 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. - UnprovableResult [Line: 776]: 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 5 procedures, 29 locations, 32 edges, 4 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: 1.2s, OverallIterations: 4, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 50 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 50 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 2 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 146 IncrementalHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2 mSolverCounterUnsat, 0 mSDtfsCounter, 146 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=55occurred in iteration=2, InterpolantAutomatonStates: 14, 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, 40 NumberOfCodeBlocks, 40 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 35 ConstructedInterpolants, 0 QuantifiedInterpolants, 79 SizeOfPredicates, 3 NumberOfNonLiveVariables, 79 ConjunctsInSsa, 7 ConjunctsInUnsatCore, 5 InterpolantComputations, 2 PerfectInterpolantSequences, 1/4 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! [2025-04-14 01:47:03,659 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...