/root/.sdkman/candidates/java/21.0.5-tem/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata ./data -tc ../benchexec/../../../trunk/examples/toolchains/AutomizerCInline_IcfgBuilder.xml -s ../benchexec/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.automaton.type.used.in.concurrency.analysis FINITE_AUTOMATA --preprocessor.replace.while.statements.and.if-then-else.statements false -i ../../../trunk/examples/svcomp/pthread/fib_unsafe-7.i -------------------------------------------------------------------------------- This is Ultimate 0.3.0-wip.dk.cfg-lbe-improvements-94356ea-m [2025-04-13 21:20:59,990 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-04-13 21:21:00,046 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 21:21:00,050 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-04-13 21:21:00,050 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-04-13 21:21:00,067 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-04-13 21:21:00,067 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-04-13 21:21:00,067 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-04-13 21:21:00,067 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-04-13 21:21:00,067 INFO L153 SettingsManager]: * Use memory slicer=true [2025-04-13 21:21:00,067 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-04-13 21:21:00,067 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-04-13 21:21:00,068 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-04-13 21:21:00,068 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-04-13 21:21:00,068 INFO L153 SettingsManager]: * Use SBE=true [2025-04-13 21:21:00,068 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-04-13 21:21:00,068 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-04-13 21:21:00,068 INFO L153 SettingsManager]: * sizeof long=4 [2025-04-13 21:21:00,068 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-04-13 21:21:00,068 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-04-13 21:21:00,068 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-04-13 21:21:00,068 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-04-13 21:21:00,068 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-04-13 21:21:00,068 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-04-13 21:21:00,068 INFO L153 SettingsManager]: * sizeof long double=12 [2025-04-13 21:21:00,070 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-04-13 21:21:00,070 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-04-13 21:21:00,070 INFO L153 SettingsManager]: * Use constant arrays=true [2025-04-13 21:21:00,070 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-04-13 21:21:00,070 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-13 21:21:00,070 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-13 21:21:00,070 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-13 21:21:00,070 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-13 21:21:00,070 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-04-13 21:21:00,070 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-13 21:21:00,070 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-13 21:21:00,071 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-13 21:21:00,071 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-13 21:21:00,071 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-04-13 21:21:00,071 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-04-13 21:21:00,071 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-04-13 21:21:00,071 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-04-13 21:21:00,071 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-04-13 21:21:00,071 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-04-13 21:21:00,071 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-04-13 21:21:00,071 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-04-13 21:21:00,071 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-04-13 21:21:00,071 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 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.preprocessor: Replace while statements and if-then-else statements -> false [2025-04-13 21:21:00,295 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-04-13 21:21:00,303 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-04-13 21:21:00,304 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-04-13 21:21:00,305 INFO L270 PluginConnector]: Initializing CDTParser... [2025-04-13 21:21:00,305 INFO L274 PluginConnector]: CDTParser initialized [2025-04-13 21:21:00,307 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_unsafe-7.i [2025-04-13 21:21:01,614 INFO L538 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e325f80a5/444cb1e3e8ba4901a04e45fd30c9f8bf/FLAG4580a83a4 [2025-04-13 21:21:01,830 INFO L389 CDTParser]: Found 1 translation units. [2025-04-13 21:21:01,830 INFO L178 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_unsafe-7.i [2025-04-13 21:21:01,841 INFO L432 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e325f80a5/444cb1e3e8ba4901a04e45fd30c9f8bf/FLAG4580a83a4 [2025-04-13 21:21:02,616 INFO L440 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e325f80a5/444cb1e3e8ba4901a04e45fd30c9f8bf [2025-04-13 21:21:02,618 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-04-13 21:21:02,619 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2025-04-13 21:21:02,620 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-04-13 21:21:02,620 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-04-13 21:21:02,624 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-04-13 21:21:02,624 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.04 09:21:02" (1/1) ... [2025-04-13 21:21:02,625 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61a46599 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 09:21:02, skipping insertion in model container [2025-04-13 21:21:02,625 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.04 09:21:02" (1/1) ... [2025-04-13 21:21:02,651 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-04-13 21:21:02,848 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_unsafe-7.i[30243,30256] [2025-04-13 21:21:02,865 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-04-13 21:21:02,871 INFO L200 MainTranslator]: Completed pre-run [2025-04-13 21:21:02,918 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_unsafe-7.i[30243,30256] [2025-04-13 21:21:02,924 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-04-13 21:21:02,948 INFO L204 MainTranslator]: Completed translation [2025-04-13 21:21:02,949 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 09:21:02 WrapperNode [2025-04-13 21:21:02,949 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-04-13 21:21:02,950 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-04-13 21:21:02,950 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-04-13 21:21:02,950 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-04-13 21:21:02,955 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 09:21:02" (1/1) ... [2025-04-13 21:21:02,970 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 09:21:02" (1/1) ... [2025-04-13 21:21:02,983 INFO L138 Inliner]: procedures = 164, calls = 20, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 63 [2025-04-13 21:21:02,983 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-04-13 21:21:02,983 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-04-13 21:21:02,983 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-04-13 21:21:02,984 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-04-13 21:21:02,988 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 09:21:02" (1/1) ... [2025-04-13 21:21:02,988 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 09:21:02" (1/1) ... [2025-04-13 21:21:02,991 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 09:21:02" (1/1) ... [2025-04-13 21:21:02,999 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 21:21:02,999 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 09:21:02" (1/1) ... [2025-04-13 21:21:02,999 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 09:21:02" (1/1) ... [2025-04-13 21:21:03,002 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 09:21:02" (1/1) ... [2025-04-13 21:21:03,002 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 09:21:02" (1/1) ... [2025-04-13 21:21:03,003 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 09:21:02" (1/1) ... [2025-04-13 21:21:03,004 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 09:21:02" (1/1) ... [2025-04-13 21:21:03,006 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-04-13 21:21:03,007 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-04-13 21:21:03,007 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-04-13 21:21:03,007 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-04-13 21:21:03,007 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 09:21:02" (1/1) ... [2025-04-13 21:21:03,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-13 21:21:03,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 21:21:03,029 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 21:21:03,034 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 21:21:03,046 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2025-04-13 21:21:03,046 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2025-04-13 21:21:03,046 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2025-04-13 21:21:03,046 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2025-04-13 21:21:03,046 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-04-13 21:21:03,046 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-04-13 21:21:03,046 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-04-13 21:21:03,046 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-04-13 21:21:03,046 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-04-13 21:21:03,046 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-04-13 21:21:03,047 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-04-13 21:21:03,141 INFO L256 CfgBuilder]: Building ICFG [2025-04-13 21:21:03,143 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-04-13 21:21:03,241 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-04-13 21:21:03,242 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-04-13 21:21:03,242 INFO L318 CfgBuilder]: Performing block encoding [2025-04-13 21:21:03,321 WARN L179 LargeBlockEncoding]: Complex 2:2 sequential composition. Such compositions can cause exponential blowup and should not occur in structured programs. [2025-04-13 21:21:03,323 WARN L179 LargeBlockEncoding]: Complex 2:2 sequential composition. Such compositions can cause exponential blowup and should not occur in structured programs. [2025-04-13 21:21:03,331 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-04-13 21:21:03,331 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 13.04 09:21:03 BoogieIcfgContainer [2025-04-13 21:21:03,331 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-04-13 21:21:03,334 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-04-13 21:21:03,334 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-04-13 21:21:03,338 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-04-13 21:21:03,338 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.04 09:21:02" (1/3) ... [2025-04-13 21:21:03,339 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1638d0c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.04 09:21:03, skipping insertion in model container [2025-04-13 21:21:03,339 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 09:21:02" (2/3) ... [2025-04-13 21:21:03,339 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1638d0c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.04 09:21:03, skipping insertion in model container [2025-04-13 21:21:03,339 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 13.04 09:21:03" (3/3) ... [2025-04-13 21:21:03,340 INFO L128 eAbstractionObserver]: Analyzing ICFG fib_unsafe-7.i [2025-04-13 21:21:03,350 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-04-13 21:21:03,351 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG fib_unsafe-7.i that has 3 procedures, 21 locations, 23 edges, 1 initial locations, 3 loop locations, and 1 error locations. [2025-04-13 21:21:03,351 INFO L490 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-04-13 21:21:03,384 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2025-04-13 21:21:03,407 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 27 places, 25 transitions, 58 flow [2025-04-13 21:21:03,427 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 21:21:03,445 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-04-13 21:21:03,453 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;@304e87a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-04-13 21:21:03,453 INFO L341 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2025-04-13 21:21:03,455 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 21:21:03,460 INFO L284 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2025-04-13 21:21:03,460 INFO L210 NwaCegarLoop]: Found error trace [2025-04-13 21:21:03,460 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 21:21:03,461 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 21:21:03,464 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 21:21:03,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1578653316, now seen corresponding path program 1 times [2025-04-13 21:21:03,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 21:21:03,472 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998718625] [2025-04-13 21:21:03,472 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 21:21:03,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 21:21:03,536 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-04-13 21:21:03,553 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-04-13 21:21:03,553 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 21:21:03,553 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 21:21:03,665 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 21:21:03,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 21:21:03,665 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998718625] [2025-04-13 21:21:03,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998718625] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 21:21:03,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 21:21:03,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-04-13 21:21:03,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640383813] [2025-04-13 21:21:03,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 21:21:03,670 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-04-13 21:21:03,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 21:21:03,683 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-04-13 21:21:03,684 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-04-13 21:21:03,686 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 21:21:03,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-04-13 21:21:03,767 INFO L93 Difference]: Finished difference Result 173 states and 570 transitions. [2025-04-13 21:21:03,768 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-04-13 21:21:03,769 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 21:21:03,769 INFO L85 Accepts]: Finished accepts. some prefix is accepted. [2025-04-13 21:21:03,774 INFO L225 Difference]: With dead ends: 173 [2025-04-13 21:21:03,775 INFO L226 Difference]: Without dead ends: 109 [2025-04-13 21:21:03,778 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 21:21:03,781 INFO L437 NwaCegarLoop]: 0 mSDtfsCounter, 14 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-04-13 21:21:03,781 INFO L438 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 0 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-04-13 21:21:03,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2025-04-13 21:21:03,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2025-04-13 21:21:03,810 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 21:21:03,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 309 transitions. [2025-04-13 21:21:03,814 INFO L79 Accepts]: Start accepts. Automaton has 109 states and 309 transitions. Word has length 11 [2025-04-13 21:21:03,814 INFO L85 Accepts]: Finished accepts. word is rejected. [2025-04-13 21:21:03,814 INFO L485 AbstractCegarLoop]: Abstraction has 109 states and 309 transitions. [2025-04-13 21:21:03,814 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 21:21:03,814 INFO L278 IsEmpty]: Start isEmpty. Operand 109 states and 309 transitions. [2025-04-13 21:21:03,815 INFO L284 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2025-04-13 21:21:03,815 INFO L210 NwaCegarLoop]: Found error trace [2025-04-13 21:21:03,815 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 21:21:03,815 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-04-13 21:21:03,815 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 21:21:03,815 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 21:21:03,815 INFO L85 PathProgramCache]: Analyzing trace with hash 1693576751, now seen corresponding path program 1 times [2025-04-13 21:21:03,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 21:21:03,816 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150344506] [2025-04-13 21:21:03,816 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 21:21:03,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 21:21:03,823 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-04-13 21:21:03,829 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-04-13 21:21:03,829 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 21:21:03,829 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 21:21:03,920 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 21:21:03,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 21:21:03,920 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150344506] [2025-04-13 21:21:03,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150344506] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 21:21:03,920 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532303742] [2025-04-13 21:21:03,920 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 21:21:03,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 21:21:03,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 21:21:03,923 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 21:21:03,925 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 21:21:03,974 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-04-13 21:21:03,993 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-04-13 21:21:03,993 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 21:21:03,993 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 21:21:03,994 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-04-13 21:21:03,998 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 21:21:04,022 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 21:21:04,022 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 21:21:04,046 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 21:21:04,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532303742] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 21:21:04,046 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 21:21:04,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2025-04-13 21:21:04,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851458191] [2025-04-13 21:21:04,047 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 21:21:04,047 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-04-13 21:21:04,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 21:21:04,048 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-04-13 21:21:04,048 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2025-04-13 21:21:04,048 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 21:21:04,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-04-13 21:21:04,139 INFO L93 Difference]: Finished difference Result 205 states and 629 transitions. [2025-04-13 21:21:04,140 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-04-13 21:21:04,140 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 21:21:04,140 INFO L85 Accepts]: Finished accepts. some prefix is accepted. [2025-04-13 21:21:04,142 INFO L225 Difference]: With dead ends: 205 [2025-04-13 21:21:04,142 INFO L226 Difference]: Without dead ends: 157 [2025-04-13 21:21:04,142 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 21:21:04,142 INFO L437 NwaCegarLoop]: 0 mSDtfsCounter, 74 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-04-13 21:21:04,143 INFO L438 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 0 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-04-13 21:21:04,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2025-04-13 21:21:04,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2025-04-13 21:21:04,161 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 21:21:04,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 453 transitions. [2025-04-13 21:21:04,162 INFO L79 Accepts]: Start accepts. Automaton has 157 states and 453 transitions. Word has length 12 [2025-04-13 21:21:04,162 INFO L85 Accepts]: Finished accepts. word is rejected. [2025-04-13 21:21:04,162 INFO L485 AbstractCegarLoop]: Abstraction has 157 states and 453 transitions. [2025-04-13 21:21:04,162 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 21:21:04,162 INFO L278 IsEmpty]: Start isEmpty. Operand 157 states and 453 transitions. [2025-04-13 21:21:04,163 INFO L284 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2025-04-13 21:21:04,163 INFO L210 NwaCegarLoop]: Found error trace [2025-04-13 21:21:04,163 INFO L218 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 21:21:04,171 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-04-13 21:21:04,369 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 21:21:04,369 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 21:21:04,370 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 21:21:04,370 INFO L85 PathProgramCache]: Analyzing trace with hash 328624452, now seen corresponding path program 2 times [2025-04-13 21:21:04,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 21:21:04,370 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129476524] [2025-04-13 21:21:04,370 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 21:21:04,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 21:21:04,380 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 15 statements into 2 equivalence classes. [2025-04-13 21:21:04,399 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-04-13 21:21:04,399 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 21:21:04,399 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 21:21:04,493 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 21:21:04,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 21:21:04,494 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129476524] [2025-04-13 21:21:04,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129476524] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 21:21:04,494 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847365788] [2025-04-13 21:21:04,494 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 21:21:04,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 21:21:04,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 21:21:04,496 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 21:21:04,497 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 21:21:04,535 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 15 statements into 2 equivalence classes. [2025-04-13 21:21:04,554 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-04-13 21:21:04,554 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 21:21:04,554 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 21:21:04,555 INFO L256 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-04-13 21:21:04,555 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 21:21:04,570 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 21:21:04,571 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 21:21:04,628 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 21:21:04,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847365788] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 21:21:04,628 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 21:21:04,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2025-04-13 21:21:04,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272318523] [2025-04-13 21:21:04,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 21:21:04,629 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-04-13 21:21:04,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 21:21:04,629 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-04-13 21:21:04,629 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2025-04-13 21:21:04,629 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 21:21:04,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-04-13 21:21:04,770 INFO L93 Difference]: Finished difference Result 301 states and 965 transitions. [2025-04-13 21:21:04,771 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-04-13 21:21:04,771 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 21:21:04,771 INFO L85 Accepts]: Finished accepts. some prefix is accepted. [2025-04-13 21:21:04,773 INFO L225 Difference]: With dead ends: 301 [2025-04-13 21:21:04,773 INFO L226 Difference]: Without dead ends: 253 [2025-04-13 21:21:04,774 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 21:21:04,774 INFO L437 NwaCegarLoop]: 0 mSDtfsCounter, 196 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-04-13 21:21:04,777 INFO L438 NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 0 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-04-13 21:21:04,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2025-04-13 21:21:04,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 253. [2025-04-13 21:21:04,800 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 21:21:04,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 741 transitions. [2025-04-13 21:21:04,801 INFO L79 Accepts]: Start accepts. Automaton has 253 states and 741 transitions. Word has length 15 [2025-04-13 21:21:04,801 INFO L85 Accepts]: Finished accepts. word is rejected. [2025-04-13 21:21:04,802 INFO L485 AbstractCegarLoop]: Abstraction has 253 states and 741 transitions. [2025-04-13 21:21:04,802 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 21:21:04,802 INFO L278 IsEmpty]: Start isEmpty. Operand 253 states and 741 transitions. [2025-04-13 21:21:04,803 INFO L284 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2025-04-13 21:21:04,803 INFO L210 NwaCegarLoop]: Found error trace [2025-04-13 21:21:04,803 INFO L218 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 21:21:04,808 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 21:21:05,003 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 21:21:05,004 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 21:21:05,004 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 21:21:05,004 INFO L85 PathProgramCache]: Analyzing trace with hash -2090552988, now seen corresponding path program 3 times [2025-04-13 21:21:05,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 21:21:05,004 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611302414] [2025-04-13 21:21:05,004 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-13 21:21:05,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 21:21:05,012 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 21 statements into 6 equivalence classes. [2025-04-13 21:21:05,045 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 21:21:05,045 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-04-13 21:21:05,045 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 21:21:05,199 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 21:21:05,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 21:21:05,199 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611302414] [2025-04-13 21:21:05,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611302414] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 21:21:05,199 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095080547] [2025-04-13 21:21:05,199 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-13 21:21:05,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 21:21:05,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 21:21:05,201 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 21:21:05,203 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 21:21:05,237 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 21 statements into 6 equivalence classes. [2025-04-13 21:21:05,255 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 21:21:05,256 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-04-13 21:21:05,256 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 21:21:05,256 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-04-13 21:21:05,258 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 21:21:05,281 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 21:21:05,281 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 21:21:05,422 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 21:21:05,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095080547] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 21:21:05,422 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 21:21:05,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 19 [2025-04-13 21:21:05,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710505189] [2025-04-13 21:21:05,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 21:21:05,423 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-04-13 21:21:05,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 21:21:05,423 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-04-13 21:21:05,424 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2025-04-13 21:21:05,424 INFO L87 Difference]: Start difference. First operand 253 states and 741 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 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 21:21:05,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-04-13 21:21:05,634 INFO L93 Difference]: Finished difference Result 397 states and 1253 transitions. [2025-04-13 21:21:05,635 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-04-13 21:21:05,635 INFO L79 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 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 21:21:05,635 INFO L85 Accepts]: Finished accepts. some prefix is accepted. [2025-04-13 21:21:05,637 INFO L225 Difference]: With dead ends: 397 [2025-04-13 21:21:05,637 INFO L226 Difference]: Without dead ends: 349 [2025-04-13 21:21:05,638 INFO L436 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 30 SyntacticMatches, 6 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2025-04-13 21:21:05,638 INFO L437 NwaCegarLoop]: 0 mSDtfsCounter, 244 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-04-13 21:21:05,638 INFO L438 NwaCegarLoop]: SdHoareTripleChecker [244 Valid, 0 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-04-13 21:21:05,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2025-04-13 21:21:05,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 349. [2025-04-13 21:21:05,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 2.956896551724138) internal successors, (1029), 348 states have internal predecessors, (1029), 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 21:21:05,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 1029 transitions. [2025-04-13 21:21:05,665 INFO L79 Accepts]: Start accepts. Automaton has 349 states and 1029 transitions. Word has length 21 [2025-04-13 21:21:05,665 INFO L85 Accepts]: Finished accepts. word is rejected. [2025-04-13 21:21:05,665 INFO L485 AbstractCegarLoop]: Abstraction has 349 states and 1029 transitions. [2025-04-13 21:21:05,665 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 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 21:21:05,665 INFO L278 IsEmpty]: Start isEmpty. Operand 349 states and 1029 transitions. [2025-04-13 21:21:05,668 INFO L284 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2025-04-13 21:21:05,668 INFO L210 NwaCegarLoop]: Found error trace [2025-04-13 21:21:05,668 INFO L218 NwaCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 21:21:05,676 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-04-13 21:21:05,875 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 21:21:05,875 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 21:21:05,875 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 21:21:05,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1104911996, now seen corresponding path program 4 times [2025-04-13 21:21:05,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 21:21:05,876 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590178] [2025-04-13 21:21:05,876 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-13 21:21:05,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 21:21:05,881 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 27 statements into 2 equivalence classes. [2025-04-13 21:21:05,900 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 27 of 27 statements. [2025-04-13 21:21:05,900 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-13 21:21:05,900 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 21:21:06,837 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 21:21:06,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 21:21:06,837 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590178] [2025-04-13 21:21:06,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590178] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 21:21:06,837 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270484939] [2025-04-13 21:21:06,837 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-13 21:21:06,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 21:21:06,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 21:21:06,839 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 21:21:06,840 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 21:21:06,875 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 27 statements into 2 equivalence classes. [2025-04-13 21:21:06,896 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 27 of 27 statements. [2025-04-13 21:21:06,896 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-13 21:21:06,896 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 21:21:06,898 INFO L256 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 59 conjuncts are in the unsatisfiable core [2025-04-13 21:21:06,900 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 21:21:07,739 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 105 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 21:21:07,740 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 21:21:08,714 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 21:21:08,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270484939] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 21:21:08,715 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 21:21:08,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 63 [2025-04-13 21:21:08,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349381679] [2025-04-13 21:21:08,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 21:21:08,715 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2025-04-13 21:21:08,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 21:21:08,716 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2025-04-13 21:21:08,717 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=691, Invalid=3469, Unknown=0, NotChecked=0, Total=4160 [2025-04-13 21:21:08,717 INFO L87 Difference]: Start difference. First operand 349 states and 1029 transitions. Second operand has 65 states, 64 states have (on average 1.265625) internal successors, (81), 64 states have internal predecessors, (81), 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 21:22:08,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-04-13 21:22:08,949 INFO L93 Difference]: Finished difference Result 25209 states and 75775 transitions. [2025-04-13 21:22:08,949 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 562 states. [2025-04-13 21:22:08,950 INFO L79 Accepts]: Start accepts. Automaton has has 65 states, 64 states have (on average 1.265625) internal successors, (81), 64 states have internal predecessors, (81), 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 27 [2025-04-13 21:22:08,950 INFO L85 Accepts]: Finished accepts. some prefix is accepted. [2025-04-13 21:22:09,068 INFO L225 Difference]: With dead ends: 25209 [2025-04-13 21:22:09,068 INFO L226 Difference]: Without dead ends: 22891 [2025-04-13 21:22:09,105 INFO L436 NwaCegarLoop]: 0 DeclaredPredicates, 615 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 605 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174473 ImplicationChecksByTransitivity, 52.4s TimeCoverageRelationStatistics Valid=72271, Invalid=295571, Unknown=0, NotChecked=0, Total=367842 [2025-04-13 21:22:09,106 INFO L437 NwaCegarLoop]: 0 mSDtfsCounter, 3611 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 9068 mSolverCounterSat, 706 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3611 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 9774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 706 IncrementalHoareTripleChecker+Valid, 9068 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2025-04-13 21:22:09,106 INFO L438 NwaCegarLoop]: SdHoareTripleChecker [3611 Valid, 0 Invalid, 9774 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [706 Valid, 9068 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2025-04-13 21:22:09,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22891 states. [2025-04-13 21:22:10,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22891 to 8881. [2025-04-13 21:22:10,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8881 states, 8880 states have (on average 3.0954954954954954) internal successors, (27488), 8880 states have internal predecessors, (27488), 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 21:22:10,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8881 states to 8881 states and 27488 transitions. [2025-04-13 21:22:10,478 INFO L79 Accepts]: Start accepts. Automaton has 8881 states and 27488 transitions. Word has length 27 [2025-04-13 21:22:10,479 INFO L85 Accepts]: Finished accepts. word is rejected. [2025-04-13 21:22:10,479 INFO L485 AbstractCegarLoop]: Abstraction has 8881 states and 27488 transitions. [2025-04-13 21:22:10,480 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 64 states have (on average 1.265625) internal successors, (81), 64 states have internal predecessors, (81), 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 21:22:10,480 INFO L278 IsEmpty]: Start isEmpty. Operand 8881 states and 27488 transitions. [2025-04-13 21:22:10,489 INFO L284 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2025-04-13 21:22:10,489 INFO L210 NwaCegarLoop]: Found error trace [2025-04-13 21:22:10,489 INFO L218 NwaCegarLoop]: trace histogram [16, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 21:22:10,496 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-04-13 21:22:10,690 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 21:22:10,690 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 21:22:10,690 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 21:22:10,691 INFO L85 PathProgramCache]: Analyzing trace with hash 1747275641, now seen corresponding path program 1 times [2025-04-13 21:22:10,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 21:22:10,691 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115629617] [2025-04-13 21:22:10,691 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 21:22:10,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 21:22:10,696 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 31 statements into 1 equivalence classes. [2025-04-13 21:22:10,712 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 31 of 31 statements. [2025-04-13 21:22:10,712 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 21:22:10,712 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 21:22:11,466 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 21:22:11,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 21:22:11,467 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115629617] [2025-04-13 21:22:11,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115629617] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 21:22:11,467 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808033971] [2025-04-13 21:22:11,467 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 21:22:11,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 21:22:11,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 21:22:11,469 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 21:22:11,469 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 21:22:11,501 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 31 statements into 1 equivalence classes. [2025-04-13 21:22:11,520 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 31 of 31 statements. [2025-04-13 21:22:11,520 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 21:22:11,521 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 21:22:11,522 INFO L256 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 61 conjuncts are in the unsatisfiable core [2025-04-13 21:22:11,523 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 21:22:12,295 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 105 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 21:22:12,295 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 21:22:13,275 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 21:22:13,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808033971] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 21:22:13,276 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 21:22:13,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 69 [2025-04-13 21:22:13,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363892093] [2025-04-13 21:22:13,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 21:22:13,276 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2025-04-13 21:22:13,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 21:22:13,277 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2025-04-13 21:22:13,278 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=662, Invalid=4308, Unknown=0, NotChecked=0, Total=4970 [2025-04-13 21:22:13,278 INFO L87 Difference]: Start difference. First operand 8881 states and 27488 transitions. Second operand has 71 states, 70 states have (on average 1.3285714285714285) internal successors, (93), 70 states have internal predecessors, (93), 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 21:23:19,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-04-13 21:23:19,725 INFO L93 Difference]: Finished difference Result 74024 states and 234126 transitions. [2025-04-13 21:23:19,725 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 438 states. [2025-04-13 21:23:19,725 INFO L79 Accepts]: Start accepts. Automaton has has 71 states, 70 states have (on average 1.3285714285714285) internal successors, (93), 70 states have internal predecessors, (93), 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 31 [2025-04-13 21:23:19,725 INFO L85 Accepts]: Finished accepts. some prefix is accepted. [2025-04-13 21:23:19,999 INFO L225 Difference]: With dead ends: 74024 [2025-04-13 21:23:19,999 INFO L226 Difference]: Without dead ends: 72722 [2025-04-13 21:23:20,040 INFO L436 NwaCegarLoop]: 0 DeclaredPredicates, 513 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 499 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109733 ImplicationChecksByTransitivity, 45.9s TimeCoverageRelationStatistics Valid=48055, Invalid=202445, Unknown=0, NotChecked=0, Total=250500 [2025-04-13 21:23:20,041 INFO L437 NwaCegarLoop]: 0 mSDtfsCounter, 4723 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 7017 mSolverCounterSat, 949 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4723 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 7966 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 949 IncrementalHoareTripleChecker+Valid, 7017 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2025-04-13 21:23:20,041 INFO L438 NwaCegarLoop]: SdHoareTripleChecker [4723 Valid, 0 Invalid, 7966 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [949 Valid, 7017 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2025-04-13 21:23:20,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72722 states. [2025-04-13 21:23:33,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72722 to 58532. [2025-04-13 21:23:33,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58532 states, 58531 states have (on average 3.3380943431685774) internal successors, (195382), 58531 states have internal predecessors, (195382), 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 21:23:33,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58532 states to 58532 states and 195382 transitions. [2025-04-13 21:23:33,571 INFO L79 Accepts]: Start accepts. Automaton has 58532 states and 195382 transitions. Word has length 31 [2025-04-13 21:23:33,571 INFO L85 Accepts]: Finished accepts. word is rejected. [2025-04-13 21:23:33,571 INFO L485 AbstractCegarLoop]: Abstraction has 58532 states and 195382 transitions. [2025-04-13 21:23:33,572 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 70 states have (on average 1.3285714285714285) internal successors, (93), 70 states have internal predecessors, (93), 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 21:23:33,572 INFO L278 IsEmpty]: Start isEmpty. Operand 58532 states and 195382 transitions. [2025-04-13 21:23:33,609 INFO L284 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2025-04-13 21:23:33,609 INFO L210 NwaCegarLoop]: Found error trace [2025-04-13 21:23:33,609 INFO L218 NwaCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 21:23:33,616 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-04-13 21:23:33,810 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 21:23:33,810 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 21:23:33,810 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 21:23:33,811 INFO L85 PathProgramCache]: Analyzing trace with hash 1414649622, now seen corresponding path program 1 times [2025-04-13 21:23:33,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 21:23:33,811 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930234664] [2025-04-13 21:23:33,811 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 21:23:33,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 21:23:33,815 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 31 statements into 1 equivalence classes. [2025-04-13 21:23:33,825 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 31 of 31 statements. [2025-04-13 21:23:33,825 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 21:23:33,825 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 21:23:34,482 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 21:23:34,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 21:23:34,482 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930234664] [2025-04-13 21:23:34,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930234664] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 21:23:34,482 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879844301] [2025-04-13 21:23:34,482 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 21:23:34,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 21:23:34,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 21:23:34,484 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 21:23:34,486 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 21:23:34,521 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 31 statements into 1 equivalence classes. [2025-04-13 21:23:34,542 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 31 of 31 statements. [2025-04-13 21:23:34,542 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 21:23:34,542 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 21:23:34,548 INFO L256 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 61 conjuncts are in the unsatisfiable core [2025-04-13 21:23:34,550 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 21:23:35,199 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 105 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 21:23:35,200 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 21:23:35,930 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 21:23:35,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879844301] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 21:23:35,931 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 21:23:35,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 69 [2025-04-13 21:23:35,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3478499] [2025-04-13 21:23:35,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 21:23:35,931 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2025-04-13 21:23:35,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 21:23:35,932 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2025-04-13 21:23:35,932 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=638, Invalid=4332, Unknown=0, NotChecked=0, Total=4970 [2025-04-13 21:23:35,932 INFO L87 Difference]: Start difference. First operand 58532 states and 195382 transitions. Second operand has 71 states, 70 states have (on average 1.3285714285714285) internal successors, (93), 70 states have internal predecessors, (93), 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 21:24:11,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-04-13 21:24:11,447 INFO L93 Difference]: Finished difference Result 90119 states and 296281 transitions. [2025-04-13 21:24:11,448 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2025-04-13 21:24:11,448 INFO L79 Accepts]: Start accepts. Automaton has has 71 states, 70 states have (on average 1.3285714285714285) internal successors, (93), 70 states have internal predecessors, (93), 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 31 [2025-04-13 21:24:11,448 INFO L85 Accepts]: Finished accepts. some prefix is accepted. [2025-04-13 21:24:11,815 INFO L225 Difference]: With dead ends: 90119 [2025-04-13 21:24:11,815 INFO L226 Difference]: Without dead ends: 89943 [2025-04-13 21:24:11,845 INFO L436 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10351 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=5954, Invalid=28456, Unknown=0, NotChecked=0, Total=34410 [2025-04-13 21:24:11,845 INFO L437 NwaCegarLoop]: 0 mSDtfsCounter, 1449 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 5980 mSolverCounterSat, 385 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1449 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 6365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 385 IncrementalHoareTripleChecker+Valid, 5980 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2025-04-13 21:24:11,845 INFO L438 NwaCegarLoop]: SdHoareTripleChecker [1449 Valid, 0 Invalid, 6365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [385 Valid, 5980 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2025-04-13 21:24:11,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89943 states. [2025-04-13 21:24:29,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89943 to 69370. [2025-04-13 21:24:29,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69370 states, 69369 states have (on average 3.433003214692442) internal successors, (238144), 69369 states have internal predecessors, (238144), 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 21:24:29,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69370 states to 69370 states and 238144 transitions. [2025-04-13 21:24:29,632 INFO L79 Accepts]: Start accepts. Automaton has 69370 states and 238144 transitions. Word has length 31 [2025-04-13 21:24:29,632 INFO L85 Accepts]: Finished accepts. word is rejected. [2025-04-13 21:24:29,632 INFO L485 AbstractCegarLoop]: Abstraction has 69370 states and 238144 transitions. [2025-04-13 21:24:29,633 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 70 states have (on average 1.3285714285714285) internal successors, (93), 70 states have internal predecessors, (93), 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 21:24:29,633 INFO L278 IsEmpty]: Start isEmpty. Operand 69370 states and 238144 transitions. [2025-04-13 21:24:29,673 INFO L284 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2025-04-13 21:24:29,673 INFO L210 NwaCegarLoop]: Found error trace [2025-04-13 21:24:29,674 INFO L218 NwaCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 21:24:29,679 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-04-13 21:24:29,874 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 21:24:29,876 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 21:24:29,876 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 21:24:29,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1903029822, now seen corresponding path program 2 times [2025-04-13 21:24:29,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 21:24:29,876 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381412003] [2025-04-13 21:24:29,876 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 21:24:29,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 21:24:29,881 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 31 statements into 2 equivalence classes. [2025-04-13 21:24:29,888 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 31 of 31 statements. [2025-04-13 21:24:29,888 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 21:24:29,888 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 21:24:30,470 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 21:24:30,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 21:24:30,471 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381412003] [2025-04-13 21:24:30,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381412003] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 21:24:30,471 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849959508] [2025-04-13 21:24:30,471 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 21:24:30,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 21:24:30,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 21:24:30,474 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 21:24:30,474 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 21:24:30,507 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 31 statements into 2 equivalence classes. [2025-04-13 21:24:30,527 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 31 of 31 statements. [2025-04-13 21:24:30,527 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 21:24:30,527 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 21:24:30,532 INFO L256 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 61 conjuncts are in the unsatisfiable core [2025-04-13 21:24:30,533 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 21:24:31,182 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 105 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 21:24:31,182 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 21:24:31,996 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 21:24:31,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849959508] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 21:24:31,996 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 21:24:31,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 69 [2025-04-13 21:24:31,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757369325] [2025-04-13 21:24:31,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 21:24:31,997 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2025-04-13 21:24:31,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 21:24:31,997 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2025-04-13 21:24:31,998 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=656, Invalid=4314, Unknown=0, NotChecked=0, Total=4970 [2025-04-13 21:24:31,998 INFO L87 Difference]: Start difference. First operand 69370 states and 238144 transitions. Second operand has 71 states, 70 states have (on average 1.3285714285714285) internal successors, (93), 70 states have internal predecessors, (93), 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 21:25:24,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-04-13 21:25:24,280 INFO L93 Difference]: Finished difference Result 111001 states and 371382 transitions. [2025-04-13 21:25:24,281 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2025-04-13 21:25:24,281 INFO L79 Accepts]: Start accepts. Automaton has has 71 states, 70 states have (on average 1.3285714285714285) internal successors, (93), 70 states have internal predecessors, (93), 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 31 [2025-04-13 21:25:24,281 INFO L85 Accepts]: Finished accepts. some prefix is accepted. [2025-04-13 21:25:24,743 INFO L225 Difference]: With dead ends: 111001 [2025-04-13 21:25:24,744 INFO L226 Difference]: Without dead ends: 110738 [2025-04-13 21:25:24,784 INFO L436 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14007 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=8205, Invalid=36951, Unknown=0, NotChecked=0, Total=45156 [2025-04-13 21:25:24,784 INFO L437 NwaCegarLoop]: 0 mSDtfsCounter, 1643 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 5843 mSolverCounterSat, 479 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1643 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 6322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 479 IncrementalHoareTripleChecker+Valid, 5843 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2025-04-13 21:25:24,784 INFO L438 NwaCegarLoop]: SdHoareTripleChecker [1643 Valid, 0 Invalid, 6322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [479 Valid, 5843 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2025-04-13 21:25:24,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110738 states. [2025-04-13 21:25:46,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110738 to 83574. [2025-04-13 21:25:46,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83574 states, 83573 states have (on average 3.5398394218228377) internal successors, (295835), 83573 states have internal predecessors, (295835), 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 21:25:47,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83574 states to 83574 states and 295835 transitions. [2025-04-13 21:25:47,108 INFO L79 Accepts]: Start accepts. Automaton has 83574 states and 295835 transitions. Word has length 31 [2025-04-13 21:25:47,108 INFO L85 Accepts]: Finished accepts. word is rejected. [2025-04-13 21:25:47,108 INFO L485 AbstractCegarLoop]: Abstraction has 83574 states and 295835 transitions. [2025-04-13 21:25:47,108 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 70 states have (on average 1.3285714285714285) internal successors, (93), 70 states have internal predecessors, (93), 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 21:25:47,108 INFO L278 IsEmpty]: Start isEmpty. Operand 83574 states and 295835 transitions. [2025-04-13 21:25:47,163 INFO L284 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2025-04-13 21:25:47,163 INFO L210 NwaCegarLoop]: Found error trace [2025-04-13 21:25:47,163 INFO L218 NwaCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 21:25:47,169 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 21:25:47,364 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 21:25:47,365 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 21:25:47,365 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 21:25:47,365 INFO L85 PathProgramCache]: Analyzing trace with hash 737014778, now seen corresponding path program 3 times [2025-04-13 21:25:47,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 21:25:47,365 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788148220] [2025-04-13 21:25:47,365 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-13 21:25:47,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 21:25:47,369 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 31 statements into 9 equivalence classes. [2025-04-13 21:25:47,387 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) and asserted 31 of 31 statements. [2025-04-13 21:25:47,387 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2025-04-13 21:25:47,387 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 21:25:47,976 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 21:25:47,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 21:25:47,976 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788148220] [2025-04-13 21:25:47,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788148220] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 21:25:47,976 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375371168] [2025-04-13 21:25:47,976 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-13 21:25:47,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 21:25:47,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 21:25:47,978 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 21:25:47,979 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 21:25:48,018 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 31 statements into 9 equivalence classes. [2025-04-13 21:25:48,041 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) and asserted 31 of 31 statements. [2025-04-13 21:25:48,042 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2025-04-13 21:25:48,042 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 21:25:48,043 INFO L256 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 61 conjuncts are in the unsatisfiable core [2025-04-13 21:25:48,044 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 21:25:48,659 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 105 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 21:25:48,660 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 21:25:49,422 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 21:25:49,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375371168] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 21:25:49,423 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 21:25:49,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 69 [2025-04-13 21:25:49,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730193660] [2025-04-13 21:25:49,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 21:25:49,423 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2025-04-13 21:25:49,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 21:25:49,424 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2025-04-13 21:25:49,424 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=653, Invalid=4317, Unknown=0, NotChecked=0, Total=4970 [2025-04-13 21:25:49,424 INFO L87 Difference]: Start difference. First operand 83574 states and 295835 transitions. Second operand has 71 states, 70 states have (on average 1.3285714285714285) internal successors, (93), 70 states have internal predecessors, (93), 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 21:27:08,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-04-13 21:27:08,572 INFO L93 Difference]: Finished difference Result 161294 states and 561110 transitions. [2025-04-13 21:27:08,572 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2025-04-13 21:27:08,572 INFO L79 Accepts]: Start accepts. Automaton has has 71 states, 70 states have (on average 1.3285714285714285) internal successors, (93), 70 states have internal predecessors, (93), 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 31 [2025-04-13 21:27:08,572 INFO L85 Accepts]: Finished accepts. some prefix is accepted. [2025-04-13 21:27:09,306 INFO L225 Difference]: With dead ends: 161294 [2025-04-13 21:27:09,306 INFO L226 Difference]: Without dead ends: 161019 [2025-04-13 21:27:09,367 INFO L436 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 219 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15422 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=8987, Invalid=39633, Unknown=0, NotChecked=0, Total=48620 [2025-04-13 21:27:09,368 INFO L437 NwaCegarLoop]: 0 mSDtfsCounter, 1617 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 6718 mSolverCounterSat, 485 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1617 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 7203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 485 IncrementalHoareTripleChecker+Valid, 6718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2025-04-13 21:27:09,368 INFO L438 NwaCegarLoop]: SdHoareTripleChecker [1617 Valid, 0 Invalid, 7203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [485 Valid, 6718 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2025-04-13 21:27:09,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161019 states. [2025-04-13 21:27:49,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161019 to 121531. [2025-04-13 21:27:49,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121531 states, 121530 states have (on average 3.7002468526289807) internal successors, (449691), 121530 states have internal predecessors, (449691), 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 21:27:49,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121531 states to 121531 states and 449691 transitions. [2025-04-13 21:27:49,827 INFO L79 Accepts]: Start accepts. Automaton has 121531 states and 449691 transitions. Word has length 31 [2025-04-13 21:27:49,828 INFO L85 Accepts]: Finished accepts. word is rejected. [2025-04-13 21:27:49,828 INFO L485 AbstractCegarLoop]: Abstraction has 121531 states and 449691 transitions. [2025-04-13 21:27:49,828 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 70 states have (on average 1.3285714285714285) internal successors, (93), 70 states have internal predecessors, (93), 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 21:27:49,828 INFO L278 IsEmpty]: Start isEmpty. Operand 121531 states and 449691 transitions. [2025-04-13 21:27:49,910 INFO L284 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2025-04-13 21:27:49,910 INFO L210 NwaCegarLoop]: Found error trace [2025-04-13 21:27:49,911 INFO L218 NwaCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 21:27:49,917 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 21:27:50,115 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 21:27:50,115 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 21:27:50,116 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 21:27:50,116 INFO L85 PathProgramCache]: Analyzing trace with hash 736611158, now seen corresponding path program 4 times [2025-04-13 21:27:50,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 21:27:50,116 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611403769] [2025-04-13 21:27:50,116 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-13 21:27:50,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 21:27:50,124 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 31 statements into 2 equivalence classes. [2025-04-13 21:27:50,132 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 31 of 31 statements. [2025-04-13 21:27:50,132 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-13 21:27:50,132 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 21:27:50,711 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 21:27:50,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 21:27:50,712 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611403769] [2025-04-13 21:27:50,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611403769] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 21:27:50,712 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86282882] [2025-04-13 21:27:50,712 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-13 21:27:50,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 21:27:50,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 21:27:50,715 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-13 21:27:50,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-04-13 21:27:50,749 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 31 statements into 2 equivalence classes. [2025-04-13 21:27:50,767 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 31 of 31 statements. [2025-04-13 21:27:50,767 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-13 21:27:50,767 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 21:27:50,768 INFO L256 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 61 conjuncts are in the unsatisfiable core [2025-04-13 21:27:50,770 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 21:27:51,424 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 105 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 21:27:51,424 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 21:27:52,168 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 21:27:52,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86282882] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 21:27:52,168 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 21:27:52,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 69 [2025-04-13 21:27:52,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282929573] [2025-04-13 21:27:52,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 21:27:52,169 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2025-04-13 21:27:52,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 21:27:52,169 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2025-04-13 21:27:52,170 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=712, Invalid=4258, Unknown=0, NotChecked=0, Total=4970 [2025-04-13 21:27:52,170 INFO L87 Difference]: Start difference. First operand 121531 states and 449691 transitions. Second operand has 71 states, 70 states have (on average 1.3285714285714285) internal successors, (93), 70 states have internal predecessors, (93), 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 21:30:54,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-04-13 21:30:54,424 INFO L93 Difference]: Finished difference Result 253346 states and 948246 transitions. [2025-04-13 21:30:54,425 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 447 states. [2025-04-13 21:30:54,426 INFO L79 Accepts]: Start accepts. Automaton has has 71 states, 70 states have (on average 1.3285714285714285) internal successors, (93), 70 states have internal predecessors, (93), 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 31 [2025-04-13 21:30:54,426 INFO L85 Accepts]: Finished accepts. some prefix is accepted. [2025-04-13 21:30:56,425 INFO L225 Difference]: With dead ends: 253346 [2025-04-13 21:30:56,426 INFO L226 Difference]: Without dead ends: 252990 [2025-04-13 21:30:56,555 INFO L436 NwaCegarLoop]: 0 DeclaredPredicates, 511 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 497 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105714 ImplicationChecksByTransitivity, 51.4s TimeCoverageRelationStatistics Valid=46199, Invalid=202303, Unknown=0, NotChecked=0, Total=248502 [2025-04-13 21:30:56,557 INFO L437 NwaCegarLoop]: 0 mSDtfsCounter, 2705 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 15204 mSolverCounterSat, 601 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2705 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 15805 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 601 IncrementalHoareTripleChecker+Valid, 15204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2025-04-13 21:30:56,557 INFO L438 NwaCegarLoop]: SdHoareTripleChecker [2705 Valid, 0 Invalid, 15805 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [601 Valid, 15204 Invalid, 0 Unknown, 0 Unchecked, 6.3s Time] [2025-04-13 21:30:56,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252990 states. [2025-04-13 21:31:59,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252990 to 177588. [2025-04-13 21:31:59,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177588 states, 177587 states have (on average 3.8740448343628757) internal successors, (687980), 177587 states have internal predecessors, (687980), 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 21:32:00,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177588 states to 177588 states and 687980 transitions. [2025-04-13 21:32:00,763 INFO L79 Accepts]: Start accepts. Automaton has 177588 states and 687980 transitions. Word has length 31 [2025-04-13 21:32:00,764 INFO L85 Accepts]: Finished accepts. word is rejected. [2025-04-13 21:32:00,764 INFO L485 AbstractCegarLoop]: Abstraction has 177588 states and 687980 transitions. [2025-04-13 21:32:00,764 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 70 states have (on average 1.3285714285714285) internal successors, (93), 70 states have internal predecessors, (93), 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 21:32:00,765 INFO L278 IsEmpty]: Start isEmpty. Operand 177588 states and 687980 transitions. [2025-04-13 21:32:00,973 INFO L284 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2025-04-13 21:32:00,973 INFO L210 NwaCegarLoop]: Found error trace [2025-04-13 21:32:00,974 INFO L218 NwaCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 21:32:00,980 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-04-13 21:32:01,174 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2025-04-13 21:32:01,175 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 21:32:01,175 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 21:32:01,176 INFO L85 PathProgramCache]: Analyzing trace with hash 587032314, now seen corresponding path program 5 times [2025-04-13 21:32:01,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 21:32:01,176 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145818686] [2025-04-13 21:32:01,176 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-13 21:32:01,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 21:32:01,210 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 31 statements into 8 equivalence classes. [2025-04-13 21:32:01,314 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) and asserted 31 of 31 statements. [2025-04-13 21:32:01,314 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2025-04-13 21:32:01,314 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 21:32:02,334 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 97 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 21:32:02,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 21:32:02,335 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145818686] [2025-04-13 21:32:02,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145818686] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 21:32:02,335 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32856187] [2025-04-13 21:32:02,335 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-13 21:32:02,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 21:32:02,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 21:32:02,341 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-13 21:32:02,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-04-13 21:32:02,399 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 31 statements into 8 equivalence classes. [2025-04-13 21:32:02,428 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) and asserted 31 of 31 statements. [2025-04-13 21:32:02,428 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2025-04-13 21:32:02,428 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 21:32:02,431 INFO L256 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 61 conjuncts are in the unsatisfiable core [2025-04-13 21:32:02,434 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 21:32:03,355 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 72 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 21:32:03,356 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 21:32:05,101 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 97 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 21:32:05,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32856187] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 21:32:05,101 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 21:32:05,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 68 [2025-04-13 21:32:05,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860761902] [2025-04-13 21:32:05,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 21:32:05,102 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2025-04-13 21:32:05,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 21:32:05,102 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2025-04-13 21:32:05,103 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=623, Invalid=4207, Unknown=0, NotChecked=0, Total=4830 [2025-04-13 21:32:05,103 INFO L87 Difference]: Start difference. First operand 177588 states and 687980 transitions. Second operand has 70 states, 69 states have (on average 1.3478260869565217) internal successors, (93), 69 states have internal predecessors, (93), 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 21:33:47,659 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 185 states. [2025-04-13 21:33:47,662 INFO L436 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 250 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21829 ImplicationChecksByTransitivity, 15.1s TimeCoverageRelationStatistics Valid=17150, Invalid=46102, Unknown=0, NotChecked=0, Total=63252 [2025-04-13 21:33:47,663 INFO L437 NwaCegarLoop]: 0 mSDtfsCounter, 1845 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 5993 mSolverCounterSat, 397 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1845 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 6390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 397 IncrementalHoareTripleChecker+Valid, 5993 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2025-04-13 21:33:47,663 INFO L438 NwaCegarLoop]: SdHoareTripleChecker [1845 Valid, 0 Invalid, 6390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [397 Valid, 5993 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2025-04-13 21:33:47,665 INFO L790 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2025-04-13 21:33:47,673 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2025-04-13 21:33:47,674 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 21:33:47,683 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-04-13 21:33:47,867 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2025-04-13 21:33:47,867 WARN L610 AbstractCegarLoop]: Verification canceled: while NwaCegarLoop was constructing difference of abstraction (177588states) and FLOYD_HOARE automaton (currently 185 states, 70 states before enhancement),while ReachableStatesComputation was computing reachable states (151527 states constructed, input type IntersectNwa). [2025-04-13 21:33:47,874 INFO L790 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2025-04-13 21:33:47,874 INFO L790 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2025-04-13 21:33:47,877 INFO L422 BasicCegarLoop]: Path program histogram: [5, 4, 1, 1] [2025-04-13 21:33:47,884 INFO L242 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2025-04-13 21:33:47,884 INFO L171 ceAbstractionStarter]: Computing trace abstraction results [2025-04-13 21:33:47,896 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.04 09:33:47 BasicIcfg [2025-04-13 21:33:47,897 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2025-04-13 21:33:47,897 INFO L158 Benchmark]: Toolchain (without parser) took 765278.38ms. Allocated memory was 167.8MB in the beginning and 3.0GB in the end (delta: 2.8GB). Free memory was 115.7MB in the beginning and 302.6MB in the end (delta: -187.0MB). Peak memory consumption was 2.6GB. Max. memory is 8.0GB. [2025-04-13 21:33:47,897 INFO L158 Benchmark]: CDTParser took 0.22ms. Allocated memory is still 159.4MB. Free memory is still 85.0MB. There was no memory consumed. Max. memory is 8.0GB. [2025-04-13 21:33:47,898 INFO L158 Benchmark]: CACSL2BoogieTranslator took 329.54ms. Allocated memory is still 167.8MB. Free memory was 115.7MB in the beginning and 93.0MB in the end (delta: 22.6MB). Peak memory consumption was 25.2MB. Max. memory is 8.0GB. [2025-04-13 21:33:47,898 INFO L158 Benchmark]: Boogie Procedure Inliner took 33.32ms. Allocated memory is still 167.8MB. Free memory was 93.0MB in the beginning and 91.0MB in the end (delta: 2.0MB). There was no memory consumed. Max. memory is 8.0GB. [2025-04-13 21:33:47,898 INFO L158 Benchmark]: Boogie Preprocessor took 22.63ms. Allocated memory is still 167.8MB. Free memory was 91.0MB in the beginning and 89.6MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 8.0GB. [2025-04-13 21:33:47,898 INFO L158 Benchmark]: IcfgBuilder took 324.66ms. Allocated memory is still 167.8MB. Free memory was 89.6MB in the beginning and 63.1MB in the end (delta: 26.5MB). Peak memory consumption was 25.2MB. Max. memory is 8.0GB. [2025-04-13 21:33:47,899 INFO L158 Benchmark]: TraceAbstraction took 764562.66ms. Allocated memory was 167.8MB in the beginning and 3.0GB in the end (delta: 2.8GB). Free memory was 62.4MB in the beginning and 302.6MB in the end (delta: -240.2MB). Peak memory consumption was 2.6GB. Max. memory is 8.0GB. [2025-04-13 21:33:47,905 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22ms. Allocated memory is still 159.4MB. Free memory is still 85.0MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 329.54ms. Allocated memory is still 167.8MB. Free memory was 115.7MB in the beginning and 93.0MB in the end (delta: 22.6MB). Peak memory consumption was 25.2MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 33.32ms. Allocated memory is still 167.8MB. Free memory was 93.0MB in the beginning and 91.0MB in the end (delta: 2.0MB). There was no memory consumed. Max. memory is 8.0GB. * Boogie Preprocessor took 22.63ms. Allocated memory is still 167.8MB. Free memory was 91.0MB in the beginning and 89.6MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 8.0GB. * IcfgBuilder took 324.66ms. Allocated memory is still 167.8MB. Free memory was 89.6MB in the beginning and 63.1MB in the end (delta: 26.5MB). Peak memory consumption was 25.2MB. Max. memory is 8.0GB. * TraceAbstraction took 764562.66ms. Allocated memory was 167.8MB in the beginning and 3.0GB in the end (delta: 2.8GB). Free memory was 62.4MB in the beginning and 302.6MB in the end (delta: -240.2MB). Peak memory consumption was 2.6GB. 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 (177588states) and FLOYD_HOARE automaton (currently 185 states, 70 states before enhancement),while ReachableStatesComputation was computing reachable states (151527 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 (177588states) and FLOYD_HOARE automaton (currently 185 states, 70 states before enhancement),while ReachableStatesComputation was computing reachable states (151527 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 (177588states) and FLOYD_HOARE automaton (currently 185 states, 70 states before enhancement),while ReachableStatesComputation was computing reachable states (151527 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: 764.5s, OverallIterations: 11, TraceHistogramMax: 16, PathProgramHistogramMax: 5, EmptinessCheckTime: 0.4s, AutomataDifference: 583.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 18121 SdHoareTripleChecker+Valid, 24.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 18121 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 20.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 4016 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 56224 IncrementalHoareTripleChecker+Invalid, 60240 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 4016 mSolverCounterUnsat, 0 mSDtfsCounter, 56224 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2677 GetRequests, 172 SyntacticMatches, 6 SemanticMatches, 2499 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451634 ImplicationChecksByTransitivity, 199.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=177588occurred in iteration=10, InterpolantAutomatonStates: 1917, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 159.1s AutomataMinimizationTime, 10 MinimizatonAttempts, 190827 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 17.7s InterpolantComputationTime, 533 NumberOfCodeBlocks, 533 NumberOfCodeBlocksAsserted, 69 NumberOfCheckSat, 763 ConstructedInterpolants, 0 QuantifiedInterpolants, 10471 SizeOfPredicates, 140 NumberOfNonLiveVariables, 2167 ConjunctsInSsa, 446 ConjunctsInUnsatCore, 31 InterpolantComputations, 1 PerfectInterpolantSequences, 702/2805 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