/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 FINITE_AUTOMATA -i ../../../trunk/examples/svcomp/pthread/fib_safe-6.i -------------------------------------------------------------------------------- This is Ultimate 0.3.0-wip.dk.cfg-lbe-improvements-94356ea-m [2025-04-13 16:53:36,230 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-04-13 16:53:36,280 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 16:53:36,287 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-04-13 16:53:36,287 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-04-13 16:53:36,309 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-04-13 16:53:36,310 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-04-13 16:53:36,310 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-04-13 16:53:36,310 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-04-13 16:53:36,310 INFO L153 SettingsManager]: * Use memory slicer=true [2025-04-13 16:53:36,310 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-04-13 16:53:36,310 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-04-13 16:53:36,311 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-04-13 16:53:36,311 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-04-13 16:53:36,311 INFO L153 SettingsManager]: * Use SBE=true [2025-04-13 16:53:36,311 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-04-13 16:53:36,311 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-04-13 16:53:36,311 INFO L153 SettingsManager]: * sizeof long=4 [2025-04-13 16:53:36,312 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-04-13 16:53:36,312 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-04-13 16:53:36,312 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-04-13 16:53:36,312 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-04-13 16:53:36,312 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-04-13 16:53:36,312 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-04-13 16:53:36,312 INFO L153 SettingsManager]: * sizeof long double=12 [2025-04-13 16:53:36,312 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-04-13 16:53:36,312 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-04-13 16:53:36,312 INFO L153 SettingsManager]: * Use constant arrays=true [2025-04-13 16:53:36,312 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-04-13 16:53:36,312 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-13 16:53:36,312 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-13 16:53:36,312 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-13 16:53:36,312 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-13 16:53:36,312 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-04-13 16:53:36,312 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-13 16:53:36,312 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-13 16:53:36,312 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-13 16:53:36,312 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-13 16:53:36,313 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-04-13 16:53:36,313 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-04-13 16:53:36,313 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-04-13 16:53:36,313 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-04-13 16:53:36,313 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-04-13 16:53:36,313 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-04-13 16:53:36,313 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-04-13 16:53:36,313 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-04-13 16:53:36,313 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-04-13 16:53:36,313 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 -> FINITE_AUTOMATA [2025-04-13 16:53:36,558 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-04-13 16:53:36,564 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-04-13 16:53:36,566 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-04-13 16:53:36,568 INFO L270 PluginConnector]: Initializing CDTParser... [2025-04-13 16:53:36,569 INFO L274 PluginConnector]: CDTParser initialized [2025-04-13 16:53:36,571 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_safe-6.i [2025-04-13 16:53:37,896 INFO L538 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/363279132/1b12cbfaa30349d481f6acc837b87cea/FLAG422f87ab0 [2025-04-13 16:53:38,139 INFO L389 CDTParser]: Found 1 translation units. [2025-04-13 16:53:38,140 INFO L178 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_safe-6.i [2025-04-13 16:53:38,153 INFO L432 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/363279132/1b12cbfaa30349d481f6acc837b87cea/FLAG422f87ab0 [2025-04-13 16:53:38,947 INFO L440 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/363279132/1b12cbfaa30349d481f6acc837b87cea [2025-04-13 16:53:38,949 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-04-13 16:53:38,950 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2025-04-13 16:53:38,951 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-04-13 16:53:38,951 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-04-13 16:53:38,954 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-04-13 16:53:38,955 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.04 04:53:38" (1/1) ... [2025-04-13 16:53:38,956 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e42ed4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 04:53:38, skipping insertion in model container [2025-04-13 16:53:38,956 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.04 04:53:38" (1/1) ... [2025-04-13 16:53:38,974 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-04-13 16:53:39,256 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/fib_safe-6.i[30241,30254] [2025-04-13 16:53:39,280 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-04-13 16:53:39,288 INFO L200 MainTranslator]: Completed pre-run [2025-04-13 16:53:39,338 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/fib_safe-6.i[30241,30254] [2025-04-13 16:53:39,345 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-04-13 16:53:39,371 INFO L204 MainTranslator]: Completed translation [2025-04-13 16:53:39,372 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 04:53:39 WrapperNode [2025-04-13 16:53:39,372 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-04-13 16:53:39,373 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-04-13 16:53:39,373 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-04-13 16:53:39,373 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-04-13 16:53:39,377 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 04:53:39" (1/1) ... [2025-04-13 16:53:39,385 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 04:53:39" (1/1) ... [2025-04-13 16:53:39,401 INFO L138 Inliner]: procedures = 164, calls = 20, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 63 [2025-04-13 16:53:39,401 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-04-13 16:53:39,402 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-04-13 16:53:39,402 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-04-13 16:53:39,402 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-04-13 16:53:39,407 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 04:53:39" (1/1) ... [2025-04-13 16:53:39,407 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 04:53:39" (1/1) ... [2025-04-13 16:53:39,411 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 04:53:39" (1/1) ... [2025-04-13 16:53:39,429 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]. [2025-04-13 16:53:39,429 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 04:53:39" (1/1) ... [2025-04-13 16:53:39,430 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 04:53:39" (1/1) ... [2025-04-13 16:53:39,433 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 04:53:39" (1/1) ... [2025-04-13 16:53:39,434 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 04:53:39" (1/1) ... [2025-04-13 16:53:39,436 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 04:53:39" (1/1) ... [2025-04-13 16:53:39,437 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 04:53:39" (1/1) ... [2025-04-13 16:53:39,437 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 04:53:39" (1/1) ... [2025-04-13 16:53:39,440 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-04-13 16:53:39,440 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-04-13 16:53:39,440 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-04-13 16:53:39,440 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-04-13 16:53:39,441 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 04:53:39" (1/1) ... [2025-04-13 16:53:39,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-13 16:53:39,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 16:53:39,464 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 16:53:39,466 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 16:53:39,481 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2025-04-13 16:53:39,481 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2025-04-13 16:53:39,481 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2025-04-13 16:53:39,481 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2025-04-13 16:53:39,481 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-04-13 16:53:39,482 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-04-13 16:53:39,482 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-04-13 16:53:39,482 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-04-13 16:53:39,482 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-04-13 16:53:39,482 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-04-13 16:53:39,482 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 16:53:39,566 INFO L234 CfgBuilder]: Building ICFG [2025-04-13 16:53:39,567 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-04-13 16:53:39,706 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-04-13 16:53:39,706 INFO L289 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-04-13 16:53:39,706 INFO L294 CfgBuilder]: Performing block encoding [2025-04-13 16:53:39,819 WARN L179 LargeBlockEncoding]: Complex 2:2 sequential composition. Such compositions can cause exponential blowup and should not occur in structured programs. [2025-04-13 16:53:39,825 WARN L179 LargeBlockEncoding]: Complex 2:2 sequential composition. Such compositions can cause exponential blowup and should not occur in structured programs. [2025-04-13 16:53:39,832 INFO L313 CfgBuilder]: Removed 0 assume(true) statements. [2025-04-13 16:53:39,833 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.04 04:53:39 BoogieIcfgContainer [2025-04-13 16:53:39,833 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-04-13 16:53:39,836 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-04-13 16:53:39,836 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-04-13 16:53:39,840 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-04-13 16:53:39,840 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.04 04:53:38" (1/3) ... [2025-04-13 16:53:39,840 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@114fb35d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.04 04:53:39, skipping insertion in model container [2025-04-13 16:53:39,840 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 04:53:39" (2/3) ... [2025-04-13 16:53:39,841 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@114fb35d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.04 04:53:39, skipping insertion in model container [2025-04-13 16:53:39,841 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.04 04:53:39" (3/3) ... [2025-04-13 16:53:39,841 INFO L128 eAbstractionObserver]: Analyzing ICFG fib_safe-6.i [2025-04-13 16:53:39,853 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-04-13 16:53:39,854 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG fib_safe-6.i that has 3 procedures, 21 locations, 23 edges, 1 initial locations, 3 loop locations, and 1 error locations. [2025-04-13 16:53:39,854 INFO L490 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-04-13 16:53:39,892 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2025-04-13 16:53:39,914 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 27 places, 25 transitions, 58 flow [2025-04-13 16:53:39,937 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 93 states, 92 states have (on average 3.2934782608695654) internal successors, (303), 92 states have internal predecessors, (303), 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 16:53:39,967 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-04-13 16:53:39,978 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=FINITE_AUTOMATA, 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;@5c8b59d8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-04-13 16:53:39,978 INFO L341 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2025-04-13 16:53:39,981 INFO L278 IsEmpty]: Start isEmpty. Operand has 93 states, 92 states have (on average 3.2934782608695654) internal successors, (303), 92 states have internal predecessors, (303), 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 16:53:39,987 INFO L284 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2025-04-13 16:53:39,987 INFO L210 NwaCegarLoop]: Found error trace [2025-04-13 16:53:39,988 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 16:53:39,988 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 16:53:39,992 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 16:53:39,993 INFO L85 PathProgramCache]: Analyzing trace with hash -1561770242, now seen corresponding path program 1 times [2025-04-13 16:53:39,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 16:53:39,999 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673468419] [2025-04-13 16:53:40,001 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 16:53:40,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 16:53:40,076 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-04-13 16:53:40,100 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-04-13 16:53:40,100 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 16:53:40,100 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 16:53:40,229 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 16:53:40,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 16:53:40,229 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673468419] [2025-04-13 16:53:40,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673468419] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 16:53:40,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 16:53:40,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-04-13 16:53:40,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104266066] [2025-04-13 16:53:40,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 16:53:40,238 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-04-13 16:53:40,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 16:53:40,250 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-04-13 16:53:40,251 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-04-13 16:53:40,254 INFO L87 Difference]: Start difference. First operand has 93 states, 92 states have (on average 3.2934782608695654) internal successors, (303), 92 states have internal predecessors, (303), 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) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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 16:53:40,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-04-13 16:53:40,332 INFO L93 Difference]: Finished difference Result 173 states and 570 transitions. [2025-04-13 16:53:40,333 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-04-13 16:53:40,335 INFO L79 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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) Word has length 11 [2025-04-13 16:53:40,335 INFO L85 Accepts]: Finished accepts. some prefix is accepted. [2025-04-13 16:53:40,343 INFO L225 Difference]: With dead ends: 173 [2025-04-13 16:53:40,343 INFO L226 Difference]: Without dead ends: 109 [2025-04-13 16:53:40,347 INFO L436 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-04-13 16:53:40,350 INFO L437 NwaCegarLoop]: 5 mSDtfsCounter, 14 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-04-13 16:53:40,350 INFO L438 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 8 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-04-13 16:53:40,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2025-04-13 16:53:40,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2025-04-13 16:53:40,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.861111111111111) internal successors, (309), 108 states have internal predecessors, (309), 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 16:53:40,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 309 transitions. [2025-04-13 16:53:40,390 INFO L79 Accepts]: Start accepts. Automaton has 109 states and 309 transitions. Word has length 11 [2025-04-13 16:53:40,390 INFO L85 Accepts]: Finished accepts. word is rejected. [2025-04-13 16:53:40,390 INFO L485 AbstractCegarLoop]: Abstraction has 109 states and 309 transitions. [2025-04-13 16:53:40,390 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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 16:53:40,390 INFO L278 IsEmpty]: Start isEmpty. Operand 109 states and 309 transitions. [2025-04-13 16:53:40,391 INFO L284 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2025-04-13 16:53:40,391 INFO L210 NwaCegarLoop]: Found error trace [2025-04-13 16:53:40,391 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 16:53:40,391 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-04-13 16:53:40,391 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 16:53:40,392 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 16:53:40,392 INFO L85 PathProgramCache]: Analyzing trace with hash -1170211856, now seen corresponding path program 1 times [2025-04-13 16:53:40,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 16:53:40,392 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311841803] [2025-04-13 16:53:40,392 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 16:53:40,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 16:53:40,409 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-04-13 16:53:40,418 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-04-13 16:53:40,418 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 16:53:40,418 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 16:53:40,489 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 16:53:40,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 16:53:40,489 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311841803] [2025-04-13 16:53:40,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311841803] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 16:53:40,489 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732708237] [2025-04-13 16:53:40,489 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 16:53:40,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 16:53:40,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 16:53:40,496 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) [2025-04-13 16:53:40,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-04-13 16:53:40,546 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-04-13 16:53:40,562 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-04-13 16:53:40,562 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 16:53:40,563 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 16:53:40,564 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-04-13 16:53:40,566 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 16:53:40,592 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 16:53:40,592 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 16:53:40,610 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 16:53:40,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732708237] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 16:53:40,610 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 16:53:40,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2025-04-13 16:53:40,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974702765] [2025-04-13 16:53:40,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 16:53:40,611 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-04-13 16:53:40,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 16:53:40,611 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-04-13 16:53:40,611 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2025-04-13 16:53:40,611 INFO L87 Difference]: Start difference. First operand 109 states and 309 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 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 16:53:40,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-04-13 16:53:40,697 INFO L93 Difference]: Finished difference Result 205 states and 629 transitions. [2025-04-13 16:53:40,699 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-04-13 16:53:40,699 INFO L79 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 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) Word has length 12 [2025-04-13 16:53:40,699 INFO L85 Accepts]: Finished accepts. some prefix is accepted. [2025-04-13 16:53:40,701 INFO L225 Difference]: With dead ends: 205 [2025-04-13 16:53:40,701 INFO L226 Difference]: Without dead ends: 157 [2025-04-13 16:53:40,701 INFO L436 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2025-04-13 16:53:40,701 INFO L437 NwaCegarLoop]: 5 mSDtfsCounter, 74 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-04-13 16:53:40,701 INFO L438 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 15 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-04-13 16:53:40,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2025-04-13 16:53:40,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2025-04-13 16:53:40,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 2.9038461538461537) internal successors, (453), 156 states have internal predecessors, (453), 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 16:53:40,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 453 transitions. [2025-04-13 16:53:40,720 INFO L79 Accepts]: Start accepts. Automaton has 157 states and 453 transitions. Word has length 12 [2025-04-13 16:53:40,720 INFO L85 Accepts]: Finished accepts. word is rejected. [2025-04-13 16:53:40,720 INFO L485 AbstractCegarLoop]: Abstraction has 157 states and 453 transitions. [2025-04-13 16:53:40,720 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 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 16:53:40,720 INFO L278 IsEmpty]: Start isEmpty. Operand 157 states and 453 transitions. [2025-04-13 16:53:40,721 INFO L284 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2025-04-13 16:53:40,721 INFO L210 NwaCegarLoop]: Found error trace [2025-04-13 16:53:40,721 INFO L218 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 16:53:40,727 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-04-13 16:53:40,926 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 16:53:40,926 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 16:53:40,926 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 16:53:40,926 INFO L85 PathProgramCache]: Analyzing trace with hash 493351806, now seen corresponding path program 2 times [2025-04-13 16:53:40,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 16:53:40,927 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996952430] [2025-04-13 16:53:40,927 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 16:53:40,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 16:53:40,944 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 15 statements into 2 equivalence classes. [2025-04-13 16:53:40,961 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-04-13 16:53:40,961 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 16:53:40,961 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 16:53:41,051 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 16:53:41,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 16:53:41,051 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996952430] [2025-04-13 16:53:41,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996952430] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 16:53:41,052 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318952142] [2025-04-13 16:53:41,052 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 16:53:41,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 16:53:41,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 16:53:41,055 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-13 16:53:41,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-04-13 16:53:41,100 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 15 statements into 2 equivalence classes. [2025-04-13 16:53:41,123 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-04-13 16:53:41,123 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 16:53:41,123 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 16:53:41,124 INFO L256 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-04-13 16:53:41,125 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 16:53:41,144 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 16:53:41,144 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 16:53:41,207 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 16:53:41,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318952142] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 16:53:41,207 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 16:53:41,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2025-04-13 16:53:41,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450987387] [2025-04-13 16:53:41,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 16:53:41,207 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-04-13 16:53:41,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 16:53:41,208 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-04-13 16:53:41,208 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2025-04-13 16:53:41,208 INFO L87 Difference]: Start difference. First operand 157 states and 453 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 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 16:53:41,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-04-13 16:53:41,345 INFO L93 Difference]: Finished difference Result 301 states and 965 transitions. [2025-04-13 16:53:41,346 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-04-13 16:53:41,346 INFO L79 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 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) Word has length 15 [2025-04-13 16:53:41,346 INFO L85 Accepts]: Finished accepts. some prefix is accepted. [2025-04-13 16:53:41,348 INFO L225 Difference]: With dead ends: 301 [2025-04-13 16:53:41,348 INFO L226 Difference]: Without dead ends: 253 [2025-04-13 16:53:41,348 INFO L436 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2025-04-13 16:53:41,349 INFO L437 NwaCegarLoop]: 5 mSDtfsCounter, 196 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-04-13 16:53:41,349 INFO L438 NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 28 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-04-13 16:53:41,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2025-04-13 16:53:41,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 253. [2025-04-13 16:53:41,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 252 states have (on average 2.9404761904761907) internal successors, (741), 252 states have internal predecessors, (741), 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 16:53:41,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 741 transitions. [2025-04-13 16:53:41,372 INFO L79 Accepts]: Start accepts. Automaton has 253 states and 741 transitions. Word has length 15 [2025-04-13 16:53:41,372 INFO L85 Accepts]: Finished accepts. word is rejected. [2025-04-13 16:53:41,372 INFO L485 AbstractCegarLoop]: Abstraction has 253 states and 741 transitions. [2025-04-13 16:53:41,372 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 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 16:53:41,372 INFO L278 IsEmpty]: Start isEmpty. Operand 253 states and 741 transitions. [2025-04-13 16:53:41,373 INFO L284 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2025-04-13 16:53:41,373 INFO L210 NwaCegarLoop]: Found error trace [2025-04-13 16:53:41,373 INFO L218 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 16:53:41,380 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-04-13 16:53:41,574 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2025-04-13 16:53:41,574 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 16:53:41,574 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 16:53:41,574 INFO L85 PathProgramCache]: Analyzing trace with hash -1439646146, now seen corresponding path program 3 times [2025-04-13 16:53:41,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 16:53:41,575 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526115384] [2025-04-13 16:53:41,575 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-13 16:53:41,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 16:53:41,590 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 21 statements into 6 equivalence classes. [2025-04-13 16:53:41,641 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 16:53:41,642 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-04-13 16:53:41,642 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 16:53:41,862 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 16:53:41,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 16:53:41,862 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526115384] [2025-04-13 16:53:41,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526115384] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 16:53:41,863 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686404404] [2025-04-13 16:53:41,863 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-13 16:53:41,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 16:53:41,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 16:53:41,865 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-13 16:53:41,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-04-13 16:53:41,911 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 21 statements into 6 equivalence classes. [2025-04-13 16:53:41,936 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 16:53:41,936 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-04-13 16:53:41,936 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 16:53:41,937 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-04-13 16:53:41,941 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 16:53:41,976 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 16:53:41,977 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 16:53:42,102 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 16:53:42,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686404404] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 16:53:42,102 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 16:53:42,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 17 [2025-04-13 16:53:42,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094878130] [2025-04-13 16:53:42,103 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 16:53:42,103 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-04-13 16:53:42,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 16:53:42,103 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-04-13 16:53:42,103 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2025-04-13 16:53:42,104 INFO L87 Difference]: Start difference. First operand 253 states and 741 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 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 16:53:42,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-04-13 16:53:42,282 INFO L93 Difference]: Finished difference Result 365 states and 1125 transitions. [2025-04-13 16:53:42,283 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-04-13 16:53:42,283 INFO L79 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 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) Word has length 21 [2025-04-13 16:53:42,283 INFO L85 Accepts]: Finished accepts. some prefix is accepted. [2025-04-13 16:53:42,285 INFO L225 Difference]: With dead ends: 365 [2025-04-13 16:53:42,286 INFO L226 Difference]: Without dead ends: 317 [2025-04-13 16:53:42,286 INFO L436 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 30 SyntacticMatches, 8 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2025-04-13 16:53:42,287 INFO L437 NwaCegarLoop]: 5 mSDtfsCounter, 204 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-04-13 16:53:42,287 INFO L438 NwaCegarLoop]: SdHoareTripleChecker [204 Valid, 40 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-04-13 16:53:42,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2025-04-13 16:53:42,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 317. [2025-04-13 16:53:42,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 316 states have (on average 2.9525316455696204) internal successors, (933), 316 states have internal predecessors, (933), 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 16:53:42,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 933 transitions. [2025-04-13 16:53:42,313 INFO L79 Accepts]: Start accepts. Automaton has 317 states and 933 transitions. Word has length 21 [2025-04-13 16:53:42,313 INFO L85 Accepts]: Finished accepts. word is rejected. [2025-04-13 16:53:42,313 INFO L485 AbstractCegarLoop]: Abstraction has 317 states and 933 transitions. [2025-04-13 16:53:42,313 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 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 16:53:42,314 INFO L278 IsEmpty]: Start isEmpty. Operand 317 states and 933 transitions. [2025-04-13 16:53:42,319 INFO L284 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2025-04-13 16:53:42,319 INFO L210 NwaCegarLoop]: Found error trace [2025-04-13 16:53:42,319 INFO L218 NwaCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 16:53:42,330 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-04-13 16:53:42,521 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 16:53:42,521 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 16:53:42,522 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 16:53:42,522 INFO L85 PathProgramCache]: Analyzing trace with hash -1180579138, now seen corresponding path program 4 times [2025-04-13 16:53:42,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 16:53:42,522 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106220363] [2025-04-13 16:53:42,522 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-13 16:53:42,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 16:53:42,530 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 25 statements into 2 equivalence classes. [2025-04-13 16:53:42,550 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 25 of 25 statements. [2025-04-13 16:53:42,551 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-13 16:53:42,551 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 16:53:43,455 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 16:53:43,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 16:53:43,456 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106220363] [2025-04-13 16:53:43,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106220363] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 16:53:43,456 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723814104] [2025-04-13 16:53:43,456 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-13 16:53:43,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 16:53:43,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 16:53:43,458 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-13 16:53:43,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-04-13 16:53:43,496 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 25 statements into 2 equivalence classes. [2025-04-13 16:53:43,519 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 25 of 25 statements. [2025-04-13 16:53:43,519 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-13 16:53:43,520 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 16:53:43,521 INFO L256 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 53 conjuncts are in the unsatisfiable core [2025-04-13 16:53:43,523 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 16:53:44,239 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 78 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 16:53:44,239 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 16:53:45,047 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 16:53:45,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723814104] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 16:53:45,048 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 16:53:45,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 57 [2025-04-13 16:53:45,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396986733] [2025-04-13 16:53:45,048 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 16:53:45,048 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2025-04-13 16:53:45,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 16:53:45,049 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2025-04-13 16:53:45,050 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=562, Invalid=2860, Unknown=0, NotChecked=0, Total=3422 [2025-04-13 16:53:45,051 INFO L87 Difference]: Start difference. First operand 317 states and 933 transitions. Second operand has 59 states, 58 states have (on average 1.293103448275862) internal successors, (75), 58 states have internal predecessors, (75), 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 16:54:26,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-04-13 16:54:26,312 INFO L93 Difference]: Finished difference Result 17842 states and 53647 transitions. [2025-04-13 16:54:26,312 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 438 states. [2025-04-13 16:54:26,312 INFO L79 Accepts]: Start accepts. Automaton has has 59 states, 58 states have (on average 1.293103448275862) internal successors, (75), 58 states have internal predecessors, (75), 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) Word has length 25 [2025-04-13 16:54:26,312 INFO L85 Accepts]: Finished accepts. some prefix is accepted. [2025-04-13 16:54:26,429 INFO L225 Difference]: With dead ends: 17842 [2025-04-13 16:54:26,429 INFO L226 Difference]: Without dead ends: 16122 [2025-04-13 16:54:26,457 INFO L436 NwaCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 477 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105091 ImplicationChecksByTransitivity, 35.9s TimeCoverageRelationStatistics Valid=45180, Invalid=183782, Unknown=0, NotChecked=0, Total=228962 [2025-04-13 16:54:26,460 INFO L437 NwaCegarLoop]: 2 mSDtfsCounter, 2940 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 7189 mSolverCounterSat, 596 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2940 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 7785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 596 IncrementalHoareTripleChecker+Valid, 7189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2025-04-13 16:54:26,460 INFO L438 NwaCegarLoop]: SdHoareTripleChecker [2940 Valid, 8 Invalid, 7785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [596 Valid, 7189 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2025-04-13 16:54:26,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16122 states. [2025-04-13 16:54:27,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16122 to 6474. [2025-04-13 16:54:27,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6474 states, 6473 states have (on average 3.1010350687471036) internal successors, (20073), 6473 states have internal predecessors, (20073), 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 16:54:27,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6474 states to 6474 states and 20073 transitions. [2025-04-13 16:54:27,337 INFO L79 Accepts]: Start accepts. Automaton has 6474 states and 20073 transitions. Word has length 25 [2025-04-13 16:54:27,339 INFO L85 Accepts]: Finished accepts. word is rejected. [2025-04-13 16:54:27,339 INFO L485 AbstractCegarLoop]: Abstraction has 6474 states and 20073 transitions. [2025-04-13 16:54:27,339 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 58 states have (on average 1.293103448275862) internal successors, (75), 58 states have internal predecessors, (75), 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 16:54:27,339 INFO L278 IsEmpty]: Start isEmpty. Operand 6474 states and 20073 transitions. [2025-04-13 16:54:27,352 INFO L284 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2025-04-13 16:54:27,352 INFO L210 NwaCegarLoop]: Found error trace [2025-04-13 16:54:27,352 INFO L218 NwaCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 16:54:27,358 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-04-13 16:54:27,557 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 16:54:27,557 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 16:54:27,557 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 16:54:27,557 INFO L85 PathProgramCache]: Analyzing trace with hash -485619176, now seen corresponding path program 1 times [2025-04-13 16:54:27,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 16:54:27,558 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553880499] [2025-04-13 16:54:27,558 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 16:54:27,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 16:54:27,567 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-04-13 16:54:27,579 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-04-13 16:54:27,584 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 16:54:27,584 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 16:54:28,150 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 16:54:28,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 16:54:28,150 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553880499] [2025-04-13 16:54:28,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553880499] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 16:54:28,150 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068435939] [2025-04-13 16:54:28,150 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 16:54:28,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 16:54:28,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 16:54:28,152 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-13 16:54:28,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-04-13 16:54:28,190 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-04-13 16:54:28,212 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-04-13 16:54:28,212 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 16:54:28,212 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 16:54:28,213 INFO L256 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 55 conjuncts are in the unsatisfiable core [2025-04-13 16:54:28,214 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 16:54:28,849 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 78 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 16:54:28,849 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 16:54:29,550 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 16:54:29,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068435939] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 16:54:29,550 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 16:54:29,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 62 [2025-04-13 16:54:29,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563115578] [2025-04-13 16:54:29,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 16:54:29,551 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2025-04-13 16:54:29,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 16:54:29,551 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2025-04-13 16:54:29,552 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=547, Invalid=3485, Unknown=0, NotChecked=0, Total=4032 [2025-04-13 16:54:29,552 INFO L87 Difference]: Start difference. First operand 6474 states and 20073 transitions. Second operand has 64 states, 63 states have (on average 1.3650793650793651) internal successors, (86), 63 states have internal predecessors, (86), 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 16:54:52,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-04-13 16:54:52,309 INFO L93 Difference]: Finished difference Result 37026 states and 114429 transitions. [2025-04-13 16:54:52,310 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 229 states. [2025-04-13 16:54:52,310 INFO L79 Accepts]: Start accepts. Automaton has has 64 states, 63 states have (on average 1.3650793650793651) internal successors, (86), 63 states have internal predecessors, (86), 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) Word has length 29 [2025-04-13 16:54:52,310 INFO L85 Accepts]: Finished accepts. some prefix is accepted. [2025-04-13 16:54:52,447 INFO L225 Difference]: With dead ends: 37026 [2025-04-13 16:54:52,447 INFO L226 Difference]: Without dead ends: 36699 [2025-04-13 16:54:52,464 INFO L436 NwaCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 283 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31520 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=16563, Invalid=64377, Unknown=0, NotChecked=0, Total=80940 [2025-04-13 16:54:52,466 INFO L437 NwaCegarLoop]: 2 mSDtfsCounter, 2130 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 5959 mSolverCounterSat, 512 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2130 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 6471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 512 IncrementalHoareTripleChecker+Valid, 5959 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2025-04-13 16:54:52,467 INFO L438 NwaCegarLoop]: SdHoareTripleChecker [2130 Valid, 6 Invalid, 6471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [512 Valid, 5959 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2025-04-13 16:54:52,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36699 states. [2025-04-13 16:54:57,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36699 to 25336. [2025-04-13 16:54:57,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25336 states, 25335 states have (on average 3.4004736530491413) internal successors, (86151), 25335 states have internal predecessors, (86151), 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 16:54:57,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25336 states to 25336 states and 86151 transitions. [2025-04-13 16:54:57,941 INFO L79 Accepts]: Start accepts. Automaton has 25336 states and 86151 transitions. Word has length 29 [2025-04-13 16:54:57,942 INFO L85 Accepts]: Finished accepts. word is rejected. [2025-04-13 16:54:57,942 INFO L485 AbstractCegarLoop]: Abstraction has 25336 states and 86151 transitions. [2025-04-13 16:54:57,942 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 63 states have (on average 1.3650793650793651) internal successors, (86), 63 states have internal predecessors, (86), 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 16:54:57,942 INFO L278 IsEmpty]: Start isEmpty. Operand 25336 states and 86151 transitions. [2025-04-13 16:54:57,974 INFO L284 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2025-04-13 16:54:57,974 INFO L210 NwaCegarLoop]: Found error trace [2025-04-13 16:54:57,975 INFO L218 NwaCegarLoop]: trace histogram [14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 16:54:57,982 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-04-13 16:54:58,179 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 16:54:58,179 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 16:54:58,179 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 16:54:58,179 INFO L85 PathProgramCache]: Analyzing trace with hash 1660259889, now seen corresponding path program 1 times [2025-04-13 16:54:58,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 16:54:58,179 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921859351] [2025-04-13 16:54:58,179 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 16:54:58,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 16:54:58,186 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-04-13 16:54:58,195 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-04-13 16:54:58,195 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 16:54:58,195 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 16:54:58,798 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 16:54:58,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 16:54:58,798 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921859351] [2025-04-13 16:54:58,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921859351] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 16:54:58,798 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569756854] [2025-04-13 16:54:58,798 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 16:54:58,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 16:54:58,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 16:54:58,800 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-13 16:54:58,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-04-13 16:54:58,835 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-04-13 16:54:58,852 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-04-13 16:54:58,852 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 16:54:58,852 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 16:54:58,853 INFO L256 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 55 conjuncts are in the unsatisfiable core [2025-04-13 16:54:58,854 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 16:54:59,426 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 78 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 16:54:59,426 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 16:55:00,136 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 16:55:00,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569756854] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 16:55:00,137 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 16:55:00,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 63 [2025-04-13 16:55:00,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062431791] [2025-04-13 16:55:00,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 16:55:00,137 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2025-04-13 16:55:00,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 16:55:00,138 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2025-04-13 16:55:00,138 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=552, Invalid=3608, Unknown=0, NotChecked=0, Total=4160 [2025-04-13 16:55:00,138 INFO L87 Difference]: Start difference. First operand 25336 states and 86151 transitions. Second operand has 65 states, 64 states have (on average 1.359375) internal successors, (87), 64 states have internal predecessors, (87), 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 16:56:04,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-04-13 16:56:04,584 INFO L93 Difference]: Finished difference Result 102551 states and 354633 transitions. [2025-04-13 16:56:04,585 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 337 states. [2025-04-13 16:56:04,585 INFO L79 Accepts]: Start accepts. Automaton has has 65 states, 64 states have (on average 1.359375) internal successors, (87), 64 states have internal predecessors, (87), 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) Word has length 29 [2025-04-13 16:56:04,585 INFO L85 Accepts]: Finished accepts. some prefix is accepted. [2025-04-13 16:56:05,089 INFO L225 Difference]: With dead ends: 102551 [2025-04-13 16:56:05,090 INFO L226 Difference]: Without dead ends: 101736 [2025-04-13 16:56:05,128 INFO L436 NwaCegarLoop]: 0 DeclaredPredicates, 406 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 392 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65093 ImplicationChecksByTransitivity, 30.0s TimeCoverageRelationStatistics Valid=28746, Invalid=126096, Unknown=0, NotChecked=0, Total=154842 [2025-04-13 16:56:05,128 INFO L437 NwaCegarLoop]: 2 mSDtfsCounter, 3148 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 7046 mSolverCounterSat, 793 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3148 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 7839 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 793 IncrementalHoareTripleChecker+Valid, 7046 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2025-04-13 16:56:05,129 INFO L438 NwaCegarLoop]: SdHoareTripleChecker [3148 Valid, 6 Invalid, 7839 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [793 Valid, 7046 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2025-04-13 16:56:05,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101736 states. [2025-04-13 16:56:26,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101736 to 80407. [2025-04-13 16:56:26,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80407 states, 80406 states have (on average 3.625799069721165) internal successors, (291536), 80406 states have internal predecessors, (291536), 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 16:56:26,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80407 states to 80407 states and 291536 transitions. [2025-04-13 16:56:26,995 INFO L79 Accepts]: Start accepts. Automaton has 80407 states and 291536 transitions. Word has length 29 [2025-04-13 16:56:26,996 INFO L85 Accepts]: Finished accepts. word is rejected. [2025-04-13 16:56:26,996 INFO L485 AbstractCegarLoop]: Abstraction has 80407 states and 291536 transitions. [2025-04-13 16:56:26,997 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 64 states have (on average 1.359375) internal successors, (87), 64 states have internal predecessors, (87), 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 16:56:26,997 INFO L278 IsEmpty]: Start isEmpty. Operand 80407 states and 291536 transitions. [2025-04-13 16:56:27,045 INFO L284 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2025-04-13 16:56:27,045 INFO L210 NwaCegarLoop]: Found error trace [2025-04-13 16:56:27,045 INFO L218 NwaCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 16:56:27,051 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-04-13 16:56:27,245 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 16:56:27,246 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 16:56:27,246 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 16:56:27,246 INFO L85 PathProgramCache]: Analyzing trace with hash -469906826, now seen corresponding path program 2 times [2025-04-13 16:56:27,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 16:56:27,246 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016718781] [2025-04-13 16:56:27,246 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 16:56:27,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 16:56:27,250 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 29 statements into 2 equivalence classes. [2025-04-13 16:56:27,257 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 29 of 29 statements. [2025-04-13 16:56:27,258 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 16:56:27,258 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 16:56:27,793 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 16:56:27,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 16:56:27,794 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016718781] [2025-04-13 16:56:27,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016718781] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 16:56:27,794 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865642290] [2025-04-13 16:56:27,794 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 16:56:27,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 16:56:27,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 16:56:27,796 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-13 16:56:27,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-04-13 16:56:27,833 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 29 statements into 2 equivalence classes. [2025-04-13 16:56:27,855 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 29 of 29 statements. [2025-04-13 16:56:27,855 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 16:56:27,855 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 16:56:27,856 INFO L256 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 55 conjuncts are in the unsatisfiable core [2025-04-13 16:56:27,857 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 16:56:28,483 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 78 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 16:56:28,483 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 16:56:29,546 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 16:56:29,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865642290] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 16:56:29,547 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 16:56:29,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 63 [2025-04-13 16:56:29,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004896200] [2025-04-13 16:56:29,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 16:56:29,547 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2025-04-13 16:56:29,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 16:56:29,548 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2025-04-13 16:56:29,548 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=3597, Unknown=0, NotChecked=0, Total=4160 [2025-04-13 16:56:29,548 INFO L87 Difference]: Start difference. First operand 80407 states and 291536 transitions. Second operand has 65 states, 64 states have (on average 1.359375) internal successors, (87), 64 states have internal predecessors, (87), 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 16:59:10,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-04-13 16:59:10,647 INFO L93 Difference]: Finished difference Result 378199 states and 1432109 transitions. [2025-04-13 16:59:10,647 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 354 states. [2025-04-13 16:59:10,647 INFO L79 Accepts]: Start accepts. Automaton has has 65 states, 64 states have (on average 1.359375) internal successors, (87), 64 states have internal predecessors, (87), 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) Word has length 29 [2025-04-13 16:59:10,647 INFO L85 Accepts]: Finished accepts. some prefix is accepted. [2025-04-13 16:59:13,190 INFO L225 Difference]: With dead ends: 378199 [2025-04-13 16:59:13,190 INFO L226 Difference]: Without dead ends: 377169 [2025-04-13 16:59:13,341 INFO L436 NwaCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 409 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70099 ImplicationChecksByTransitivity, 24.4s TimeCoverageRelationStatistics Valid=34217, Invalid=134293, Unknown=0, NotChecked=0, Total=168510 [2025-04-13 16:59:13,342 INFO L437 NwaCegarLoop]: 2 mSDtfsCounter, 2624 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 6134 mSolverCounterSat, 532 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2624 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 6666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 532 IncrementalHoareTripleChecker+Valid, 6134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2025-04-13 16:59:13,342 INFO L438 NwaCegarLoop]: SdHoareTripleChecker [2624 Valid, 4 Invalid, 6666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [532 Valid, 6134 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2025-04-13 16:59:13,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377169 states. [2025-04-13 17:00:57,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377169 to 349631. [2025-04-13 17:00:58,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349631 states, 349630 states have (on average 3.8627920944998997) internal successors, (1350548), 349630 states have internal predecessors, (1350548), 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 17:01:01,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349631 states to 349631 states and 1350548 transitions. [2025-04-13 17:01:01,807 INFO L79 Accepts]: Start accepts. Automaton has 349631 states and 1350548 transitions. Word has length 29 [2025-04-13 17:01:01,807 INFO L85 Accepts]: Finished accepts. word is rejected. [2025-04-13 17:01:01,807 INFO L485 AbstractCegarLoop]: Abstraction has 349631 states and 1350548 transitions. [2025-04-13 17:01:01,808 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 64 states have (on average 1.359375) internal successors, (87), 64 states have internal predecessors, (87), 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 17:01:01,808 INFO L278 IsEmpty]: Start isEmpty. Operand 349631 states and 1350548 transitions. [2025-04-13 17:01:02,202 INFO L284 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2025-04-13 17:01:02,202 INFO L210 NwaCegarLoop]: Found error trace [2025-04-13 17:01:02,203 INFO L218 NwaCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 17:01:02,209 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-04-13 17:01:02,403 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 17:01:02,404 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 17:01:02,405 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 17:01:02,405 INFO L85 PathProgramCache]: Analyzing trace with hash -1996969654, now seen corresponding path program 3 times [2025-04-13 17:01:02,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 17:01:02,405 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942852140] [2025-04-13 17:01:02,405 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-13 17:01:02,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 17:01:02,415 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 29 statements into 8 equivalence classes. [2025-04-13 17:01:02,443 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) and asserted 29 of 29 statements. [2025-04-13 17:01:02,443 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2025-04-13 17:01:02,443 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 17:01:03,318 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 17:01:03,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 17:01:03,319 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942852140] [2025-04-13 17:01:03,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942852140] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 17:01:03,319 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930751248] [2025-04-13 17:01:03,319 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-13 17:01:03,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 17:01:03,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 17:01:03,321 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-13 17:01:03,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-04-13 17:01:03,390 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 29 statements into 8 equivalence classes. [2025-04-13 17:01:03,415 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) and asserted 29 of 29 statements. [2025-04-13 17:01:03,415 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2025-04-13 17:01:03,415 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 17:01:03,417 INFO L256 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 55 conjuncts are in the unsatisfiable core [2025-04-13 17:01:03,419 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 17:01:04,573 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 78 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 17:01:04,573 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 17:01:05,494 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 17:01:05,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930751248] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 17:01:05,494 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 17:01:05,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 63 [2025-04-13 17:01:05,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302542933] [2025-04-13 17:01:05,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 17:01:05,496 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2025-04-13 17:01:05,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 17:01:05,497 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2025-04-13 17:01:05,497 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=552, Invalid=3608, Unknown=0, NotChecked=0, Total=4160 [2025-04-13 17:01:05,497 INFO L87 Difference]: Start difference. First operand 349631 states and 1350548 transitions. Second operand has 65 states, 64 states have (on average 1.359375) internal successors, (87), 64 states have internal predecessors, (87), 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) Received shutdown request... [2025-04-13 17:05:56,388 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2025-04-13 17:05:56,388 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 287 states. [2025-04-13 17:05:56,392 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2025-04-13 17:05:56,450 INFO L436 NwaCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 342 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48548 ImplicationChecksByTransitivity, 19.3s TimeCoverageRelationStatistics Valid=23769, Invalid=94223, Unknown=0, NotChecked=0, Total=117992 [2025-04-13 17:05:56,452 INFO L437 NwaCegarLoop]: 2 mSDtfsCounter, 2123 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 6837 mSolverCounterSat, 633 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2123 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 7470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 633 IncrementalHoareTripleChecker+Valid, 6837 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2025-04-13 17:05:56,452 INFO L438 NwaCegarLoop]: SdHoareTripleChecker [2123 Valid, 4 Invalid, 7470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [633 Valid, 6837 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2025-04-13 17:05:56,463 INFO L790 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2025-04-13 17:05:56,495 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-04-13 17:05:56,666 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2025-04-13 17:05:56,667 WARN L610 AbstractCegarLoop]: Verification canceled: while NwaCegarLoop was constructing difference of abstraction (349631states) and FLOYD_HOARE automaton (currently 287 states, 65 states before enhancement),while ReachableStatesComputation was computing reachable states (559770 states constructed, input type IntersectNwa). [2025-04-13 17:05:56,679 INFO L790 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2025-04-13 17:05:56,679 INFO L790 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2025-04-13 17:05:56,691 INFO L422 BasicCegarLoop]: Path program histogram: [4, 3, 1, 1] [2025-04-13 17:05:56,703 INFO L242 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2025-04-13 17:05:56,703 INFO L171 ceAbstractionStarter]: Computing trace abstraction results [2025-04-13 17:05:56,719 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.04 05:05:56 BasicIcfg [2025-04-13 17:05:56,720 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2025-04-13 17:05:56,721 INFO L158 Benchmark]: Toolchain (without parser) took 737770.01ms. Allocated memory was 167.8MB in the beginning and 5.9GB in the end (delta: 5.7GB). Free memory was 119.1MB in the beginning and 3.6GB in the end (delta: -3.4GB). Peak memory consumption was 5.4GB. Max. memory is 8.0GB. [2025-04-13 17:05:56,721 INFO L158 Benchmark]: CDTParser took 0.26ms. Allocated memory is still 159.4MB. Free memory is still 86.3MB. There was no memory consumed. Max. memory is 8.0GB. [2025-04-13 17:05:56,721 INFO L158 Benchmark]: CACSL2BoogieTranslator took 420.84ms. Allocated memory is still 167.8MB. Free memory was 118.8MB in the beginning and 96.7MB in the end (delta: 22.2MB). Peak memory consumption was 21.0MB. Max. memory is 8.0GB. [2025-04-13 17:05:56,721 INFO L158 Benchmark]: Boogie Procedure Inliner took 28.60ms. Allocated memory is still 167.8MB. Free memory was 96.7MB in the beginning and 94.7MB in the end (delta: 2.0MB). Peak memory consumption was 4.2MB. Max. memory is 8.0GB. [2025-04-13 17:05:56,722 INFO L158 Benchmark]: Boogie Preprocessor took 38.11ms. Allocated memory is still 167.8MB. Free memory was 94.7MB in the beginning and 92.8MB in the end (delta: 1.9MB). There was no memory consumed. Max. memory is 8.0GB. [2025-04-13 17:05:56,722 INFO L158 Benchmark]: RCFGBuilder took 392.69ms. Allocated memory is still 167.8MB. Free memory was 92.8MB in the beginning and 66.6MB in the end (delta: 26.2MB). Peak memory consumption was 25.2MB. Max. memory is 8.0GB. [2025-04-13 17:05:56,722 INFO L158 Benchmark]: TraceAbstraction took 736883.90ms. Allocated memory was 167.8MB in the beginning and 5.9GB in the end (delta: 5.7GB). Free memory was 66.0MB in the beginning and 3.6GB in the end (delta: -3.5GB). Peak memory consumption was 5.4GB. Max. memory is 8.0GB. [2025-04-13 17:05:56,731 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26ms. Allocated memory is still 159.4MB. Free memory is still 86.3MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 420.84ms. Allocated memory is still 167.8MB. Free memory was 118.8MB in the beginning and 96.7MB in the end (delta: 22.2MB). Peak memory consumption was 21.0MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 28.60ms. Allocated memory is still 167.8MB. Free memory was 96.7MB in the beginning and 94.7MB in the end (delta: 2.0MB). Peak memory consumption was 4.2MB. Max. memory is 8.0GB. * Boogie Preprocessor took 38.11ms. Allocated memory is still 167.8MB. Free memory was 94.7MB in the beginning and 92.8MB in the end (delta: 1.9MB). There was no memory consumed. Max. memory is 8.0GB. * RCFGBuilder took 392.69ms. Allocated memory is still 167.8MB. Free memory was 92.8MB in the beginning and 66.6MB in the end (delta: 26.2MB). Peak memory consumption was 25.2MB. Max. memory is 8.0GB. * TraceAbstraction took 736883.90ms. Allocated memory was 167.8MB in the beginning and 5.9GB in the end (delta: 5.7GB). Free memory was 66.0MB in the beginning and 3.6GB in the end (delta: -3.5GB). Peak memory consumption was 5.4GB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 681]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable Cancelled while NwaCegarLoop was constructing difference of abstraction (349631states) and FLOYD_HOARE automaton (currently 287 states, 65 states before enhancement),while ReachableStatesComputation was computing reachable states (559770 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 720]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message) Cancelled while NwaCegarLoop was constructing difference of abstraction (349631states) and FLOYD_HOARE automaton (currently 287 states, 65 states before enhancement),while ReachableStatesComputation was computing reachable states (559770 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 721]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message) Cancelled while NwaCegarLoop was constructing difference of abstraction (349631states) and FLOYD_HOARE automaton (currently 287 states, 65 states before enhancement),while ReachableStatesComputation was computing reachable states (559770 states constructed, input type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 31 locations, 37 edges, 3 error locations. Started 1 CEGAR loops. OverallTime: 736.8s, OverallIterations: 9, TraceHistogramMax: 14, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.5s, AutomataDifference: 584.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 13453 SdHoareTripleChecker+Valid, 16.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 13453 mSDsluCounter, 119 SdHoareTripleChecker+Invalid, 13.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 89 mSDsCounter, 3080 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 33457 IncrementalHoareTripleChecker+Invalid, 36537 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 3080 mSolverCounterUnsat, 30 mSDtfsCounter, 33457 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2087 GetRequests, 144 SyntacticMatches, 8 SemanticMatches, 1935 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320463 ImplicationChecksByTransitivity, 123.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=349631occurred in iteration=8, InterpolantAutomatonStates: 1395, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 136.0s AutomataMinimizationTime, 8 MinimizatonAttempts, 69878 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 12.2s InterpolantComputationTime, 389 NumberOfCodeBlocks, 389 NumberOfCodeBlocksAsserted, 47 NumberOfCheckSat, 553 ConstructedInterpolants, 0 QuantifiedInterpolants, 6417 SizeOfPredicates, 90 NumberOfNonLiveVariables, 1569 ConjunctsInSsa, 294 ConjunctsInUnsatCore, 25 InterpolantComputations, 1 PerfectInterpolantSequences, 390/1698 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 could not prove your program: Timeout Completed graceful shutdown