/root/.sdkman/candidates/java/21.0.5-tem/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata ./data -tc ../benchexec/../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../benchexec/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.automaton.type.used.in.concurrency.analysis FINITE_AUTOMATA -i ../../../trunk/examples/svcomp/weaver/parallel-bakery-4.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.3.0-wip.dk.cfg-lbe-improvements-94356ea-m [2025-04-13 18:02:29,614 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-04-13 18:02:29,674 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 18:02:29,680 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-04-13 18:02:29,680 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-04-13 18:02:29,698 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-04-13 18:02:29,698 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-04-13 18:02:29,698 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-04-13 18:02:29,699 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-04-13 18:02:29,699 INFO L153 SettingsManager]: * Use memory slicer=true [2025-04-13 18:02:29,700 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-04-13 18:02:29,700 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-04-13 18:02:29,700 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-04-13 18:02:29,700 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-04-13 18:02:29,701 INFO L153 SettingsManager]: * Use SBE=true [2025-04-13 18:02:29,701 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-04-13 18:02:29,701 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-04-13 18:02:29,701 INFO L153 SettingsManager]: * sizeof long=4 [2025-04-13 18:02:29,701 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-04-13 18:02:29,701 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-04-13 18:02:29,701 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-04-13 18:02:29,701 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-04-13 18:02:29,701 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-04-13 18:02:29,701 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-04-13 18:02:29,701 INFO L153 SettingsManager]: * sizeof long double=12 [2025-04-13 18:02:29,702 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-04-13 18:02:29,702 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-04-13 18:02:29,702 INFO L153 SettingsManager]: * Use constant arrays=true [2025-04-13 18:02:29,702 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-04-13 18:02:29,702 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-13 18:02:29,702 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-13 18:02:29,702 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-13 18:02:29,702 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-13 18:02:29,702 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-04-13 18:02:29,702 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-13 18:02:29,702 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-13 18:02:29,702 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-13 18:02:29,702 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-13 18:02:29,702 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-04-13 18:02:29,702 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-04-13 18:02:29,702 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-04-13 18:02:29,702 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-04-13 18:02:29,702 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-04-13 18:02:29,702 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-04-13 18:02:29,702 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-04-13 18:02:29,703 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-04-13 18:02:29,703 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-04-13 18:02:29,703 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Automaton type used in concurrency analysis -> FINITE_AUTOMATA [2025-04-13 18:02:29,931 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-04-13 18:02:29,938 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-04-13 18:02:29,940 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-04-13 18:02:29,940 INFO L270 PluginConnector]: Initializing CDTParser... [2025-04-13 18:02:29,941 INFO L274 PluginConnector]: CDTParser initialized [2025-04-13 18:02:29,942 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/parallel-bakery-4.wvr.c [2025-04-13 18:02:31,288 INFO L538 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4fa13760c/0ce6c011a2cb42ec9a01132acb04e6fa/FLAGef321ae1e [2025-04-13 18:02:31,488 INFO L389 CDTParser]: Found 1 translation units. [2025-04-13 18:02:31,489 INFO L178 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-bakery-4.wvr.c [2025-04-13 18:02:31,500 INFO L432 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4fa13760c/0ce6c011a2cb42ec9a01132acb04e6fa/FLAGef321ae1e [2025-04-13 18:02:32,288 INFO L440 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4fa13760c/0ce6c011a2cb42ec9a01132acb04e6fa [2025-04-13 18:02:32,290 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-04-13 18:02:32,291 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2025-04-13 18:02:32,291 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-04-13 18:02:32,291 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-04-13 18:02:32,294 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-04-13 18:02:32,295 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.04 06:02:32" (1/1) ... [2025-04-13 18:02:32,296 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6767bb87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 06:02:32, skipping insertion in model container [2025-04-13 18:02:32,296 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.04 06:02:32" (1/1) ... [2025-04-13 18:02:32,310 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-04-13 18:02:32,502 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-bakery-4.wvr.c[5088,5101] [2025-04-13 18:02:32,511 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-04-13 18:02:32,518 INFO L200 MainTranslator]: Completed pre-run [2025-04-13 18:02:32,548 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-bakery-4.wvr.c[5088,5101] [2025-04-13 18:02:32,548 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-04-13 18:02:32,557 INFO L204 MainTranslator]: Completed translation [2025-04-13 18:02:32,558 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 06:02:32 WrapperNode [2025-04-13 18:02:32,558 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-04-13 18:02:32,559 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-04-13 18:02:32,559 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-04-13 18:02:32,559 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-04-13 18:02:32,563 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 06:02:32" (1/1) ... [2025-04-13 18:02:32,570 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 06:02:32" (1/1) ... [2025-04-13 18:02:32,593 INFO L138 Inliner]: procedures = 20, calls = 36, calls flagged for inlining = 28, calls inlined = 28, statements flattened = 365 [2025-04-13 18:02:32,593 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-04-13 18:02:32,594 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-04-13 18:02:32,594 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-04-13 18:02:32,594 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-04-13 18:02:32,600 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 06:02:32" (1/1) ... [2025-04-13 18:02:32,600 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 06:02:32" (1/1) ... [2025-04-13 18:02:32,603 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 06:02:32" (1/1) ... [2025-04-13 18:02:32,615 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 18:02:32,616 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 06:02:32" (1/1) ... [2025-04-13 18:02:32,616 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 06:02:32" (1/1) ... [2025-04-13 18:02:32,620 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 06:02:32" (1/1) ... [2025-04-13 18:02:32,625 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 06:02:32" (1/1) ... [2025-04-13 18:02:32,631 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 06:02:32" (1/1) ... [2025-04-13 18:02:32,632 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 06:02:32" (1/1) ... [2025-04-13 18:02:32,633 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 06:02:32" (1/1) ... [2025-04-13 18:02:32,641 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-04-13 18:02:32,641 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-04-13 18:02:32,642 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-04-13 18:02:32,642 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-04-13 18:02:32,642 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 06:02:32" (1/1) ... [2025-04-13 18:02:32,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-13 18:02:32,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 18:02:32,674 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 18:02:32,676 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 18:02:32,695 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-04-13 18:02:32,695 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-04-13 18:02:32,695 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-04-13 18:02:32,695 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-04-13 18:02:32,695 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-04-13 18:02:32,695 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2025-04-13 18:02:32,695 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2025-04-13 18:02:32,695 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2025-04-13 18:02:32,695 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2025-04-13 18:02:32,695 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-04-13 18:02:32,695 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-04-13 18:02:32,695 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-04-13 18:02:32,696 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-04-13 18:02:32,775 INFO L234 CfgBuilder]: Building ICFG [2025-04-13 18:02:32,777 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-04-13 18:02:33,126 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-04-13 18:02:33,126 INFO L289 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-04-13 18:02:33,126 INFO L294 CfgBuilder]: Performing block encoding [2025-04-13 18:02:33,396 INFO L313 CfgBuilder]: Removed 0 assume(true) statements. [2025-04-13 18:02:33,396 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.04 06:02:33 BoogieIcfgContainer [2025-04-13 18:02:33,396 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-04-13 18:02:33,397 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-04-13 18:02:33,397 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-04-13 18:02:33,401 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-04-13 18:02:33,402 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.04 06:02:32" (1/3) ... [2025-04-13 18:02:33,402 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c186247 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.04 06:02:33, skipping insertion in model container [2025-04-13 18:02:33,402 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 06:02:32" (2/3) ... [2025-04-13 18:02:33,402 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c186247 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.04 06:02:33, skipping insertion in model container [2025-04-13 18:02:33,402 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.04 06:02:33" (3/3) ... [2025-04-13 18:02:33,403 INFO L128 eAbstractionObserver]: Analyzing ICFG parallel-bakery-4.wvr.c [2025-04-13 18:02:33,414 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-04-13 18:02:33,415 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG parallel-bakery-4.wvr.c that has 5 procedures, 110 locations, 117 edges, 1 initial locations, 0 loop locations, and 1 error locations. [2025-04-13 18:02:33,415 INFO L490 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-04-13 18:02:33,476 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2025-04-13 18:02:33,506 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 122 places, 121 transitions, 270 flow [2025-04-13 18:02:38,259 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 182729 states, 182728 states have (on average 4.911113786611795) internal successors, (897398), 182728 states have internal predecessors, (897398), 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 18:02:38,275 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-04-13 18:02:38,282 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;@3304c50e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-04-13 18:02:38,283 INFO L341 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2025-04-13 18:02:38,555 INFO L278 IsEmpty]: Start isEmpty. Operand has 182729 states, 182728 states have (on average 4.911113786611795) internal successors, (897398), 182728 states have internal predecessors, (897398), 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 18:02:39,841 INFO L284 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2025-04-13 18:02:39,841 INFO L210 NwaCegarLoop]: Found error trace [2025-04-13 18:02:39,842 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 18:02:39,842 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2025-04-13 18:02:39,845 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 18:02:39,846 INFO L85 PathProgramCache]: Analyzing trace with hash 2005819674, now seen corresponding path program 1 times [2025-04-13 18:02:39,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 18:02:39,851 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254900631] [2025-04-13 18:02:39,851 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 18:02:39,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 18:02:39,935 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 92 statements into 1 equivalence classes. [2025-04-13 18:02:40,022 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 92 of 92 statements. [2025-04-13 18:02:40,022 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 18:02:40,023 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 18:02:40,489 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 18:02:40,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 18:02:40,491 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254900631] [2025-04-13 18:02:40,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254900631] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 18:02:40,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 18:02:40,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-04-13 18:02:40,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057328343] [2025-04-13 18:02:40,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 18:02:40,497 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-04-13 18:02:40,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 18:02:40,512 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-04-13 18:02:40,512 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-04-13 18:02:40,904 INFO L87 Difference]: Start difference. First operand has 182729 states, 182728 states have (on average 4.911113786611795) internal successors, (897398), 182728 states have internal predecessors, (897398), 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 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 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 18:02:46,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-04-13 18:02:46,250 INFO L93 Difference]: Finished difference Result 416635 states and 2027047 transitions. [2025-04-13 18:02:46,251 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-04-13 18:02:46,252 INFO L79 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 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 92 [2025-04-13 18:02:46,253 INFO L85 Accepts]: Finished accepts. some prefix is accepted. [2025-04-13 18:02:49,225 INFO L225 Difference]: With dead ends: 416635 [2025-04-13 18:02:49,225 INFO L226 Difference]: Without dead ends: 309057 [2025-04-13 18:02:49,527 INFO L436 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-04-13 18:02:49,529 INFO L437 NwaCegarLoop]: 84 mSDtfsCounter, 130 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-04-13 18:02:49,529 INFO L438 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 165 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-04-13 18:02:49,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309057 states. [2025-04-13 18:02:58,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309057 to 222747. [2025-04-13 18:02:58,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222747 states, 222746 states have (on average 4.953790415989513) internal successors, (1103437), 222746 states have internal predecessors, (1103437), 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 18:03:01,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222747 states to 222747 states and 1103437 transitions. [2025-04-13 18:03:01,469 INFO L79 Accepts]: Start accepts. Automaton has 222747 states and 1103437 transitions. Word has length 92 [2025-04-13 18:03:01,470 INFO L85 Accepts]: Finished accepts. word is rejected. [2025-04-13 18:03:01,470 INFO L485 AbstractCegarLoop]: Abstraction has 222747 states and 1103437 transitions. [2025-04-13 18:03:01,470 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 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 18:03:01,470 INFO L278 IsEmpty]: Start isEmpty. Operand 222747 states and 1103437 transitions. [2025-04-13 18:03:02,814 INFO L284 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2025-04-13 18:03:02,814 INFO L210 NwaCegarLoop]: Found error trace [2025-04-13 18:03:02,814 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 18:03:02,815 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-04-13 18:03:02,815 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2025-04-13 18:03:02,820 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 18:03:02,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1225399000, now seen corresponding path program 2 times [2025-04-13 18:03:02,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 18:03:02,820 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765346835] [2025-04-13 18:03:02,820 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 18:03:02,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 18:03:02,860 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 92 statements into 1 equivalence classes. [2025-04-13 18:03:02,913 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 92 of 92 statements. [2025-04-13 18:03:02,913 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-04-13 18:03:02,913 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 18:03:03,189 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 18:03:03,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 18:03:03,189 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765346835] [2025-04-13 18:03:03,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765346835] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 18:03:03,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 18:03:03,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-04-13 18:03:03,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414468922] [2025-04-13 18:03:03,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 18:03:03,191 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-04-13 18:03:03,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 18:03:03,191 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-04-13 18:03:03,191 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-04-13 18:03:03,192 INFO L87 Difference]: Start difference. First operand 222747 states and 1103437 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 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 18:03:11,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-04-13 18:03:11,357 INFO L93 Difference]: Finished difference Result 574485 states and 2838534 transitions. [2025-04-13 18:03:11,357 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-04-13 18:03:11,357 INFO L79 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 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 92 [2025-04-13 18:03:11,357 INFO L85 Accepts]: Finished accepts. some prefix is accepted. [2025-04-13 18:03:14,818 INFO L225 Difference]: With dead ends: 574485 [2025-04-13 18:03:14,822 INFO L226 Difference]: Without dead ends: 389974 [2025-04-13 18:03:15,212 INFO L436 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-04-13 18:03:15,213 INFO L437 NwaCegarLoop]: 84 mSDtfsCounter, 132 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2025-04-13 18:03:15,213 INFO L438 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 166 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2025-04-13 18:03:16,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389974 states. [2025-04-13 18:03:25,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389974 to 245045. [2025-04-13 18:03:25,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245045 states, 245044 states have (on average 4.94213692234864) internal successors, (1211041), 245044 states have internal predecessors, (1211041), 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 18:03:27,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245045 states to 245045 states and 1211041 transitions. [2025-04-13 18:03:28,502 INFO L79 Accepts]: Start accepts. Automaton has 245045 states and 1211041 transitions. Word has length 92 [2025-04-13 18:03:28,502 INFO L85 Accepts]: Finished accepts. word is rejected. [2025-04-13 18:03:28,502 INFO L485 AbstractCegarLoop]: Abstraction has 245045 states and 1211041 transitions. [2025-04-13 18:03:28,502 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 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 18:03:28,502 INFO L278 IsEmpty]: Start isEmpty. Operand 245045 states and 1211041 transitions. [2025-04-13 18:03:29,821 INFO L284 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2025-04-13 18:03:29,822 INFO L210 NwaCegarLoop]: Found error trace [2025-04-13 18:03:29,822 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 18:03:29,822 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-04-13 18:03:29,823 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2025-04-13 18:03:29,823 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 18:03:29,823 INFO L85 PathProgramCache]: Analyzing trace with hash -1614039032, now seen corresponding path program 3 times [2025-04-13 18:03:29,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 18:03:29,823 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967215732] [2025-04-13 18:03:29,823 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-13 18:03:29,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 18:03:29,866 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 92 statements into 1 equivalence classes. [2025-04-13 18:03:29,908 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) and asserted 92 of 92 statements. [2025-04-13 18:03:29,908 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2025-04-13 18:03:29,908 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 18:03:30,032 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 18:03:30,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 18:03:30,033 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967215732] [2025-04-13 18:03:30,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967215732] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 18:03:30,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 18:03:30,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-04-13 18:03:30,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272359736] [2025-04-13 18:03:30,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 18:03:30,033 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-04-13 18:03:30,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 18:03:30,034 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-04-13 18:03:30,034 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-04-13 18:03:30,034 INFO L87 Difference]: Start difference. First operand 245045 states and 1211041 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 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)