/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --cacsl2boogietranslator.allow.undefined.functions true --traceabstraction.smt.solver External_ModelsAndUnsatCoreMode --traceabstraction.command.for.external.solver 'cvc4 --incremental --print-success --lang smt' -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Bitvector.epf -i ../../../trunk/examples/svcomp/float-benchs/rlim_exit.c -------------------------------------------------------------------------------- This is Ultimate 0.2.5-dev-b75d321-m [2024-11-03 02:18:01,477 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-03 02:18:01,516 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Bitvector.epf [2024-11-03 02:18:01,519 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-03 02:18:01,519 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-03 02:18:01,534 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-03 02:18:01,534 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-03 02:18:01,535 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-03 02:18:01,535 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-03 02:18:01,535 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-03 02:18:01,536 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-03 02:18:01,536 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-03 02:18:01,536 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-03 02:18:01,536 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-03 02:18:01,537 INFO L153 SettingsManager]: * Use SBE=true [2024-11-03 02:18:01,537 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-03 02:18:01,537 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-03 02:18:01,538 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-03 02:18:01,538 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-03 02:18:01,538 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-03 02:18:01,538 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-03 02:18:01,539 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-03 02:18:01,539 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-03 02:18:01,539 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-03 02:18:01,540 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-11-03 02:18:01,540 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-03 02:18:01,540 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-11-03 02:18:01,540 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-03 02:18:01,541 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-03 02:18:01,541 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-03 02:18:01,541 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-03 02:18:01,541 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-03 02:18:01,541 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-03 02:18:01,542 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-03 02:18:01,542 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-03 02:18:01,542 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-03 02:18:01,542 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-03 02:18:01,543 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-03 02:18:01,543 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2024-11-03 02:18:01,543 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-11-03 02:18:01,543 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-03 02:18:01,545 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-03 02:18:01,545 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-03 02:18:01,545 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-03 02:18:01,545 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Allow undefined functions -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Command for external solver -> cvc4 --incremental --print-success --lang smt [2024-11-03 02:18:01,801 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-03 02:18:01,822 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-03 02:18:01,823 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-03 02:18:01,824 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-03 02:18:01,825 INFO L274 PluginConnector]: CDTParser initialized [2024-11-03 02:18:01,825 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-benchs/rlim_exit.c [2024-11-03 02:18:03,302 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-03 02:18:03,439 INFO L384 CDTParser]: Found 1 translation units. [2024-11-03 02:18:03,440 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-benchs/rlim_exit.c [2024-11-03 02:18:03,445 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b41512c1c/66e55956f438429f927b15d1e219054b/FLAG2c797926a [2024-11-03 02:18:03,859 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b41512c1c/66e55956f438429f927b15d1e219054b [2024-11-03 02:18:03,862 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-03 02:18:03,862 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-11-03 02:18:03,864 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-03 02:18:03,864 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-03 02:18:03,867 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-03 02:18:03,868 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:18:03" (1/1) ... [2024-11-03 02:18:03,869 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@609d98fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:18:03, skipping insertion in model container [2024-11-03 02:18:03,869 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:18:03" (1/1) ... [2024-11-03 02:18:03,887 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-03 02:18:04,003 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/float-benchs/rlim_exit.c[446,459] [2024-11-03 02:18:04,017 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-03 02:18:04,027 INFO L200 MainTranslator]: Completed pre-run [2024-11-03 02:18:04,035 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/float-benchs/rlim_exit.c[446,459] [2024-11-03 02:18:04,038 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-03 02:18:04,049 INFO L204 MainTranslator]: Completed translation [2024-11-03 02:18:04,049 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:18:04 WrapperNode [2024-11-03 02:18:04,050 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-03 02:18:04,050 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-03 02:18:04,050 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-03 02:18:04,051 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-03 02:18:04,055 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:18:04" (1/1) ... [2024-11-03 02:18:04,061 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:18:04" (1/1) ... [2024-11-03 02:18:04,072 INFO L138 Inliner]: procedures = 15, calls = 10, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 49 [2024-11-03 02:18:04,072 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-03 02:18:04,073 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-03 02:18:04,073 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-03 02:18:04,073 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-03 02:18:04,080 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:18:04" (1/1) ... [2024-11-03 02:18:04,080 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:18:04" (1/1) ... [2024-11-03 02:18:04,084 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:18:04" (1/1) ... [2024-11-03 02:18:04,097 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]. [2024-11-03 02:18:04,097 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:18:04" (1/1) ... [2024-11-03 02:18:04,097 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:18:04" (1/1) ... [2024-11-03 02:18:04,103 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:18:04" (1/1) ... [2024-11-03 02:18:04,104 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:18:04" (1/1) ... [2024-11-03 02:18:04,109 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:18:04" (1/1) ... [2024-11-03 02:18:04,110 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:18:04" (1/1) ... [2024-11-03 02:18:04,112 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-03 02:18:04,112 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-03 02:18:04,112 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-03 02:18:04,112 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-03 02:18:04,113 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:18:04" (1/1) ... [2024-11-03 02:18:04,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-03 02:18:04,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-03 02:18:04,141 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) [2024-11-03 02:18:04,153 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 [2024-11-03 02:18:04,171 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-03 02:18:04,171 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-11-03 02:18:04,171 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-03 02:18:04,172 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-03 02:18:04,172 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-03 02:18:04,173 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-03 02:18:04,256 INFO L238 CfgBuilder]: Building ICFG [2024-11-03 02:18:04,259 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-03 02:18:04,447 INFO L? ?]: Removed 17 outVars from TransFormulas that were not future-live. [2024-11-03 02:18:04,447 INFO L287 CfgBuilder]: Performing block encoding [2024-11-03 02:18:04,462 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-03 02:18:04,462 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-03 02:18:04,462 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:18:04 BoogieIcfgContainer [2024-11-03 02:18:04,462 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-03 02:18:04,464 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-03 02:18:04,464 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-03 02:18:04,466 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-03 02:18:04,466 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:18:03" (1/3) ... [2024-11-03 02:18:04,467 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@371a9df4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:18:04, skipping insertion in model container [2024-11-03 02:18:04,467 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:18:04" (2/3) ... [2024-11-03 02:18:04,467 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@371a9df4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:18:04, skipping insertion in model container [2024-11-03 02:18:04,468 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:18:04" (3/3) ... [2024-11-03 02:18:04,469 INFO L112 eAbstractionObserver]: Analyzing ICFG rlim_exit.c [2024-11-03 02:18:04,480 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-03 02:18:04,480 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-03 02:18:04,516 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-03 02:18:04,520 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@12e8e9a8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-03 02:18:04,520 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-03 02:18:04,525 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 16 states have (on average 1.4375) internal successors, (23), 17 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-03 02:18:04,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-03 02:18:04,529 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 02:18:04,529 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-03 02:18:04,530 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 02:18:04,533 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 02:18:04,533 INFO L85 PathProgramCache]: Analyzing trace with hash 889617946, now seen corresponding path program 1 times [2024-11-03 02:18:04,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 02:18:04,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1608393392] [2024-11-03 02:18:04,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 02:18:04,540 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-03 02:18:04,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-03 02:18:04,543 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-03 02:18:04,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (2)] Waiting until timeout for monitored process [2024-11-03 02:18:04,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 02:18:04,599 INFO L255 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-03 02:18:04,602 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 02:18:04,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-03 02:18:04,642 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 02:18:04,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-03 02:18:04,655 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 02:18:04,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1608393392] [2024-11-03 02:18:04,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1608393392] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-03 02:18:04,655 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-03 02:18:04,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2024-11-03 02:18:04,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586261010] [2024-11-03 02:18:04,657 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-03 02:18:04,660 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-03 02:18:04,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 02:18:04,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-03 02:18:04,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-03 02:18:04,677 INFO L87 Difference]: Start difference. First operand has 21 states, 16 states have (on average 1.4375) internal successors, (23), 17 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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) [2024-11-03 02:18:04,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-03 02:18:04,718 INFO L93 Difference]: Finished difference Result 48 states and 72 transitions. [2024-11-03 02:18:04,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-03 02:18:04,720 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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 6 [2024-11-03 02:18:04,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-03 02:18:04,724 INFO L225 Difference]: With dead ends: 48 [2024-11-03 02:18:04,725 INFO L226 Difference]: Without dead ends: 25 [2024-11-03 02:18:04,727 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-03 02:18:04,729 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 12 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-03 02:18:04,730 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 51 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-03 02:18:04,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-11-03 02:18:04,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2024-11-03 02:18:04,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-03 02:18:04,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2024-11-03 02:18:04,757 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 6 [2024-11-03 02:18:04,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-03 02:18:04,757 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2024-11-03 02:18:04,757 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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) [2024-11-03 02:18:04,757 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2024-11-03 02:18:04,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-03 02:18:04,759 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 02:18:04,759 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-03 02:18:04,763 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (2)] Ended with exit code 0 [2024-11-03 02:18:04,959 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-03 02:18:04,960 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 02:18:04,961 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 02:18:04,961 INFO L85 PathProgramCache]: Analyzing trace with hash 343707370, now seen corresponding path program 1 times [2024-11-03 02:18:04,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 02:18:04,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1965463879] [2024-11-03 02:18:04,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 02:18:04,962 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-03 02:18:04,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-03 02:18:04,965 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-03 02:18:04,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (3)] Waiting until timeout for monitored process [2024-11-03 02:18:05,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 02:18:05,244 INFO L255 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-03 02:18:05,247 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 02:18:05,381 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-03 02:18:05,382 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 02:18:05,532 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-03 02:18:05,532 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 02:18:05,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1965463879] [2024-11-03 02:18:05,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1965463879] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-03 02:18:05,533 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-03 02:18:05,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2024-11-03 02:18:05,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923718302] [2024-11-03 02:18:05,533 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-03 02:18:05,536 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-03 02:18:05,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 02:18:05,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-03 02:18:05,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-11-03 02:18:05,538 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 4 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-03 02:18:05,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-03 02:18:05,667 INFO L93 Difference]: Finished difference Result 57 states and 83 transitions. [2024-11-03 02:18:05,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-03 02:18:05,668 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 4 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 34 [2024-11-03 02:18:05,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-03 02:18:05,669 INFO L225 Difference]: With dead ends: 57 [2024-11-03 02:18:05,669 INFO L226 Difference]: Without dead ends: 53 [2024-11-03 02:18:05,669 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2024-11-03 02:18:05,670 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 51 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-03 02:18:05,670 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 115 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-03 02:18:05,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-11-03 02:18:05,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2024-11-03 02:18:05,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 39 states have (on average 1.3333333333333333) internal successors, (52), 39 states have internal predecessors, (52), 12 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-11-03 02:18:05,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 76 transitions. [2024-11-03 02:18:05,680 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 76 transitions. Word has length 34 [2024-11-03 02:18:05,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-03 02:18:05,681 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 76 transitions. [2024-11-03 02:18:05,682 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 4 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-03 02:18:05,682 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 76 transitions. [2024-11-03 02:18:05,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2024-11-03 02:18:05,684 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 02:18:05,684 INFO L215 NwaCegarLoop]: trace histogram [12, 12, 12, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2024-11-03 02:18:05,689 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (3)] Ended with exit code 0 [2024-11-03 02:18:05,884 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-03 02:18:05,885 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 02:18:05,885 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 02:18:05,885 INFO L85 PathProgramCache]: Analyzing trace with hash 611428490, now seen corresponding path program 2 times [2024-11-03 02:18:05,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 02:18:05,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1425735750] [2024-11-03 02:18:05,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 02:18:05,886 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-03 02:18:05,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-03 02:18:05,888 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-03 02:18:05,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2024-11-03 02:18:06,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 02:18:06,532 INFO L255 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-03 02:18:06,537 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 02:18:06,653 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-11-03 02:18:06,653 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 02:18:06,928 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-11-03 02:18:06,928 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 02:18:06,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1425735750] [2024-11-03 02:18:06,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1425735750] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-03 02:18:06,928 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-03 02:18:06,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2024-11-03 02:18:06,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778467837] [2024-11-03 02:18:06,929 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-03 02:18:06,929 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-03 02:18:06,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 02:18:06,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-03 02:18:06,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2024-11-03 02:18:06,931 INFO L87 Difference]: Start difference. First operand 53 states and 76 transitions. Second operand has 16 states, 16 states have (on average 3.6875) internal successors, (59), 16 states have internal predecessors, (59), 12 states have call successors, (24), 1 states have call predecessors, (24), 1 states have return successors, (24), 12 states have call predecessors, (24), 12 states have call successors, (24) [2024-11-03 02:18:07,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-03 02:18:07,362 INFO L93 Difference]: Finished difference Result 113 states and 175 transitions. [2024-11-03 02:18:07,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-03 02:18:07,362 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 16 states have internal predecessors, (59), 12 states have call successors, (24), 1 states have call predecessors, (24), 1 states have return successors, (24), 12 states have call predecessors, (24), 12 states have call successors, (24) Word has length 90 [2024-11-03 02:18:07,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-03 02:18:07,364 INFO L225 Difference]: With dead ends: 113 [2024-11-03 02:18:07,364 INFO L226 Difference]: Without dead ends: 109 [2024-11-03 02:18:07,365 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=174, Invalid=288, Unknown=0, NotChecked=0, Total=462 [2024-11-03 02:18:07,365 INFO L432 NwaCegarLoop]: 72 mSDtfsCounter, 186 mSDsluCounter, 450 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 522 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-03 02:18:07,366 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 522 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-03 02:18:07,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2024-11-03 02:18:07,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2024-11-03 02:18:07,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 79 states have (on average 1.3670886075949367) internal successors, (108), 79 states have internal predecessors, (108), 28 states have call successors, (28), 1 states have call predecessors, (28), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2024-11-03 02:18:07,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 164 transitions. [2024-11-03 02:18:07,403 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 164 transitions. Word has length 90 [2024-11-03 02:18:07,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-03 02:18:07,403 INFO L471 AbstractCegarLoop]: Abstraction has 109 states and 164 transitions. [2024-11-03 02:18:07,403 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 16 states have internal predecessors, (59), 12 states have call successors, (24), 1 states have call predecessors, (24), 1 states have return successors, (24), 12 states have call predecessors, (24), 12 states have call successors, (24) [2024-11-03 02:18:07,403 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 164 transitions. [2024-11-03 02:18:07,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2024-11-03 02:18:07,407 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 02:18:07,407 INFO L215 NwaCegarLoop]: trace histogram [28, 28, 28, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1] [2024-11-03 02:18:07,418 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (4)] Forceful destruction successful, exit code 0 [2024-11-03 02:18:07,610 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-03 02:18:07,611 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 02:18:07,611 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 02:18:07,611 INFO L85 PathProgramCache]: Analyzing trace with hash 187677642, now seen corresponding path program 3 times [2024-11-03 02:18:07,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 02:18:07,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [852158665] [2024-11-03 02:18:07,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 02:18:07,612 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-03 02:18:07,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-03 02:18:07,616 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-03 02:18:07,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2024-11-03 02:18:09,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 02:18:09,365 INFO L255 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-03 02:18:09,375 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 02:18:09,680 INFO L134 CoverageAnalysis]: Checked inductivity of 2072 backedges. 0 proven. 560 refuted. 0 times theorem prover too weak. 1512 trivial. 0 not checked. [2024-11-03 02:18:09,680 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 02:18:10,358 INFO L134 CoverageAnalysis]: Checked inductivity of 2072 backedges. 0 proven. 560 refuted. 0 times theorem prover too weak. 1512 trivial. 0 not checked. [2024-11-03 02:18:10,358 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 02:18:10,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [852158665] [2024-11-03 02:18:10,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [852158665] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-03 02:18:10,359 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-03 02:18:10,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2024-11-03 02:18:10,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529794702] [2024-11-03 02:18:10,359 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-03 02:18:10,360 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-03 02:18:10,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 02:18:10,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-03 02:18:10,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=706, Unknown=0, NotChecked=0, Total=992 [2024-11-03 02:18:10,362 INFO L87 Difference]: Start difference. First operand 109 states and 164 transitions. Second operand has 32 states, 32 states have (on average 3.84375) internal successors, (123), 32 states have internal predecessors, (123), 28 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 28 states have call predecessors, (56), 28 states have call successors, (56) [2024-11-03 02:18:12,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-03 02:18:12,206 INFO L93 Difference]: Finished difference Result 225 states and 359 transitions. [2024-11-03 02:18:12,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-03 02:18:12,207 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.84375) internal successors, (123), 32 states have internal predecessors, (123), 28 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 28 states have call predecessors, (56), 28 states have call successors, (56) Word has length 202 [2024-11-03 02:18:12,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-03 02:18:12,209 INFO L225 Difference]: With dead ends: 225 [2024-11-03 02:18:12,209 INFO L226 Difference]: Without dead ends: 221 [2024-11-03 02:18:12,210 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 416 GetRequests, 372 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=734, Invalid=1336, Unknown=0, NotChecked=0, Total=2070 [2024-11-03 02:18:12,211 INFO L432 NwaCegarLoop]: 144 mSDtfsCounter, 777 mSDsluCounter, 1749 mSDsCounter, 0 mSdLazyCounter, 959 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 781 SdHoareTripleChecker+Valid, 1893 SdHoareTripleChecker+Invalid, 989 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 959 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-03 02:18:12,211 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [781 Valid, 1893 Invalid, 989 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 959 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-03 02:18:12,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2024-11-03 02:18:12,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 221. [2024-11-03 02:18:12,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 159 states have (on average 1.3836477987421383) internal successors, (220), 159 states have internal predecessors, (220), 60 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 60 states have call predecessors, (60), 60 states have call successors, (60) [2024-11-03 02:18:12,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 340 transitions. [2024-11-03 02:18:12,229 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 340 transitions. Word has length 202 [2024-11-03 02:18:12,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-03 02:18:12,229 INFO L471 AbstractCegarLoop]: Abstraction has 221 states and 340 transitions. [2024-11-03 02:18:12,230 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.84375) internal successors, (123), 32 states have internal predecessors, (123), 28 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 28 states have call predecessors, (56), 28 states have call successors, (56) [2024-11-03 02:18:12,230 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 340 transitions. [2024-11-03 02:18:12,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 427 [2024-11-03 02:18:12,234 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 02:18:12,234 INFO L215 NwaCegarLoop]: trace histogram [60, 60, 60, 30, 30, 30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1] [2024-11-03 02:18:12,254 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (5)] Ended with exit code 0 [2024-11-03 02:18:12,435 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-03 02:18:12,435 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 02:18:12,436 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 02:18:12,436 INFO L85 PathProgramCache]: Analyzing trace with hash -646225334, now seen corresponding path program 4 times [2024-11-03 02:18:12,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 02:18:12,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [515201078] [2024-11-03 02:18:12,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 02:18:12,436 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-03 02:18:12,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-03 02:18:12,439 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-03 02:18:12,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2024-11-03 02:18:16,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 02:18:16,304 INFO L255 TraceCheckSpWp]: Trace formula consists of 650 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-03 02:18:16,310 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 02:18:16,999 INFO L134 CoverageAnalysis]: Checked inductivity of 9720 backedges. 0 proven. 2640 refuted. 0 times theorem prover too weak. 7080 trivial. 0 not checked. [2024-11-03 02:18:16,999 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 02:18:19,019 INFO L134 CoverageAnalysis]: Checked inductivity of 9720 backedges. 0 proven. 2640 refuted. 0 times theorem prover too weak. 7080 trivial. 0 not checked. [2024-11-03 02:18:19,019 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 02:18:19,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [515201078] [2024-11-03 02:18:19,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [515201078] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-03 02:18:19,020 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-03 02:18:19,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 64 [2024-11-03 02:18:19,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711184149] [2024-11-03 02:18:19,020 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-03 02:18:19,021 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2024-11-03 02:18:19,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 02:18:19,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2024-11-03 02:18:19,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1086, Invalid=2946, Unknown=0, NotChecked=0, Total=4032 [2024-11-03 02:18:19,025 INFO L87 Difference]: Start difference. First operand 221 states and 340 transitions. Second operand has 64 states, 64 states have (on average 3.921875) internal successors, (251), 64 states have internal predecessors, (251), 60 states have call successors, (120), 1 states have call predecessors, (120), 1 states have return successors, (120), 60 states have call predecessors, (120), 60 states have call successors, (120) [2024-11-03 02:18:30,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-03 02:18:30,058 INFO L93 Difference]: Finished difference Result 449 states and 727 transitions. [2024-11-03 02:18:30,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2024-11-03 02:18:30,059 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 3.921875) internal successors, (251), 64 states have internal predecessors, (251), 60 states have call successors, (120), 1 states have call predecessors, (120), 1 states have return successors, (120), 60 states have call predecessors, (120), 60 states have call successors, (120) Word has length 426 [2024-11-03 02:18:30,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-03 02:18:30,065 INFO L225 Difference]: With dead ends: 449 [2024-11-03 02:18:30,065 INFO L226 Difference]: Without dead ends: 445 [2024-11-03 02:18:30,068 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 880 GetRequests, 788 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=3006, Invalid=5736, Unknown=0, NotChecked=0, Total=8742 [2024-11-03 02:18:30,070 INFO L432 NwaCegarLoop]: 288 mSDtfsCounter, 2994 mSDsluCounter, 7008 mSDsCounter, 0 mSdLazyCounter, 3966 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2998 SdHoareTripleChecker+Valid, 7296 SdHoareTripleChecker+Invalid, 4030 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 3966 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2024-11-03 02:18:30,070 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2998 Valid, 7296 Invalid, 4030 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 3966 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2024-11-03 02:18:30,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2024-11-03 02:18:30,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 445. [2024-11-03 02:18:30,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 319 states have (on average 1.3918495297805642) internal successors, (444), 319 states have internal predecessors, (444), 124 states have call successors, (124), 1 states have call predecessors, (124), 1 states have return successors, (124), 124 states have call predecessors, (124), 124 states have call successors, (124) [2024-11-03 02:18:30,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 692 transitions. [2024-11-03 02:18:30,177 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 692 transitions. Word has length 426 [2024-11-03 02:18:30,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-03 02:18:30,178 INFO L471 AbstractCegarLoop]: Abstraction has 445 states and 692 transitions. [2024-11-03 02:18:30,179 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 3.921875) internal successors, (251), 64 states have internal predecessors, (251), 60 states have call successors, (120), 1 states have call predecessors, (120), 1 states have return successors, (120), 60 states have call predecessors, (120), 60 states have call successors, (120) [2024-11-03 02:18:30,179 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 692 transitions. [2024-11-03 02:18:30,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 875 [2024-11-03 02:18:30,219 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 02:18:30,220 INFO L215 NwaCegarLoop]: trace histogram [124, 124, 124, 62, 62, 62, 62, 62, 62, 62, 62, 1, 1, 1, 1, 1, 1] [2024-11-03 02:18:30,296 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (6)] Ended with exit code 0 [2024-11-03 02:18:30,420 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-03 02:18:30,420 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 02:18:30,421 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 02:18:30,421 INFO L85 PathProgramCache]: Analyzing trace with hash -1521438902, now seen corresponding path program 5 times [2024-11-03 02:18:30,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 02:18:30,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [144865312] [2024-11-03 02:18:30,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 02:18:30,424 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-03 02:18:30,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-03 02:18:30,426 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-03 02:18:30,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2024-11-03 02:18:39,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 02:18:39,331 INFO L255 TraceCheckSpWp]: Trace formula consists of 1322 conjuncts, 64 conjuncts are in the unsatisfiable core [2024-11-03 02:18:39,370 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 02:18:41,459 INFO L134 CoverageAnalysis]: Checked inductivity of 41912 backedges. 0 proven. 11408 refuted. 0 times theorem prover too weak. 30504 trivial. 0 not checked. [2024-11-03 02:18:41,459 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 02:18:49,009 INFO L134 CoverageAnalysis]: Checked inductivity of 41912 backedges. 0 proven. 11408 refuted. 0 times theorem prover too weak. 30504 trivial. 0 not checked. [2024-11-03 02:18:49,009 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 02:18:49,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [144865312] [2024-11-03 02:18:49,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [144865312] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-03 02:18:49,010 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-03 02:18:49,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 128 [2024-11-03 02:18:49,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662472649] [2024-11-03 02:18:49,010 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-03 02:18:49,011 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2024-11-03 02:18:49,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 02:18:49,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2024-11-03 02:18:49,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4222, Invalid=12034, Unknown=0, NotChecked=0, Total=16256 [2024-11-03 02:18:49,027 INFO L87 Difference]: Start difference. First operand 445 states and 692 transitions. Second operand has 128 states, 128 states have (on average 3.9609375) internal successors, (507), 128 states have internal predecessors, (507), 124 states have call successors, (248), 1 states have call predecessors, (248), 1 states have return successors, (248), 124 states have call predecessors, (248), 124 states have call successors, (248)