/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 Internal_SMTInterpol -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Bitvector.epf -i ../../../trunk/examples/svcomp/bitvector/soft_float_4-2a.c.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.5-dev-b75d321-m [2024-11-02 19:56:29,031 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-02 19:56:29,107 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Bitvector.epf [2024-11-02 19:56:29,113 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-02 19:56:29,114 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-02 19:56:29,144 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-02 19:56:29,144 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-02 19:56:29,145 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-02 19:56:29,145 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-02 19:56:29,146 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-02 19:56:29,147 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-02 19:56:29,147 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-02 19:56:29,148 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-02 19:56:29,148 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-02 19:56:29,148 INFO L153 SettingsManager]: * Use SBE=true [2024-11-02 19:56:29,149 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-02 19:56:29,151 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-02 19:56:29,154 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-02 19:56:29,154 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-02 19:56:29,154 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-02 19:56:29,154 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-02 19:56:29,155 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-02 19:56:29,155 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-02 19:56:29,155 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-02 19:56:29,156 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-11-02 19:56:29,156 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-02 19:56:29,156 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-11-02 19:56:29,156 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-02 19:56:29,156 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-02 19:56:29,157 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-02 19:56:29,157 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-02 19:56:29,157 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-02 19:56:29,158 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-02 19:56:29,158 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-02 19:56:29,158 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-02 19:56:29,161 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-02 19:56:29,161 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-02 19:56:29,161 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-02 19:56:29,161 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2024-11-02 19:56:29,161 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-11-02 19:56:29,161 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-02 19:56:29,162 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-02 19:56:29,162 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-02 19:56:29,162 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-02 19:56:29,162 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Allow undefined functions -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol [2024-11-02 19:56:29,395 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-02 19:56:29,413 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-02 19:56:29,417 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-02 19:56:29,418 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-02 19:56:29,418 INFO L274 PluginConnector]: CDTParser initialized [2024-11-02 19:56:29,419 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/soft_float_4-2a.c.cil.c [2024-11-02 19:56:30,870 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-02 19:56:31,041 INFO L384 CDTParser]: Found 1 translation units. [2024-11-02 19:56:31,042 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/bitvector/soft_float_4-2a.c.cil.c [2024-11-02 19:56:31,050 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a42736d6f/f679cfc136fb4596ab31a6ab374f6929/FLAG0d67efad6 [2024-11-02 19:56:31,064 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a42736d6f/f679cfc136fb4596ab31a6ab374f6929 [2024-11-02 19:56:31,066 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-02 19:56:31,068 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-11-02 19:56:31,069 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-02 19:56:31,069 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-02 19:56:31,074 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-02 19:56:31,075 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 07:56:31" (1/1) ... [2024-11-02 19:56:31,076 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2943b934 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 07:56:31, skipping insertion in model container [2024-11-02 19:56:31,076 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 07:56:31" (1/1) ... [2024-11-02 19:56:31,100 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-02 19:56:31,245 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/bitvector/soft_float_4-2a.c.cil.c[755,768] [2024-11-02 19:56:31,289 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 19:56:31,300 INFO L200 MainTranslator]: Completed pre-run [2024-11-02 19:56:31,313 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/bitvector/soft_float_4-2a.c.cil.c[755,768] [2024-11-02 19:56:31,348 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 19:56:31,361 INFO L204 MainTranslator]: Completed translation [2024-11-02 19:56:31,362 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 07:56:31 WrapperNode [2024-11-02 19:56:31,362 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-02 19:56:31,363 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-02 19:56:31,363 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-02 19:56:31,363 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-02 19:56:31,369 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 07:56:31" (1/1) ... [2024-11-02 19:56:31,377 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 07:56:31" (1/1) ... [2024-11-02 19:56:31,392 INFO L138 Inliner]: procedures = 17, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 54 [2024-11-02 19:56:31,393 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-02 19:56:31,393 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-02 19:56:31,393 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-02 19:56:31,394 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-02 19:56:31,404 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 07:56:31" (1/1) ... [2024-11-02 19:56:31,404 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 07:56:31" (1/1) ... [2024-11-02 19:56:31,407 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 07:56:31" (1/1) ... [2024-11-02 19:56:31,417 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]. [2024-11-02 19:56:31,418 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 07:56:31" (1/1) ... [2024-11-02 19:56:31,418 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 07:56:31" (1/1) ... [2024-11-02 19:56:31,424 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 07:56:31" (1/1) ... [2024-11-02 19:56:31,428 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 07:56:31" (1/1) ... [2024-11-02 19:56:31,430 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 07:56:31" (1/1) ... [2024-11-02 19:56:31,431 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 07:56:31" (1/1) ... [2024-11-02 19:56:31,433 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-02 19:56:31,434 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-02 19:56:31,434 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-02 19:56:31,434 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-02 19:56:31,435 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 07:56:31" (1/1) ... [2024-11-02 19:56:31,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-02 19:56:31,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-02 19:56:31,462 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) [2024-11-02 19:56:31,466 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-02 19:56:31,488 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-02 19:56:31,488 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-11-02 19:56:31,488 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2024-11-02 19:56:31,488 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2024-11-02 19:56:31,488 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-02 19:56:31,489 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-02 19:56:31,489 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2024-11-02 19:56:31,489 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2024-11-02 19:56:31,489 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-02 19:56:31,489 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-02 19:56:31,565 INFO L238 CfgBuilder]: Building ICFG [2024-11-02 19:56:31,567 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-02 19:56:31,825 INFO L? ?]: Removed 34 outVars from TransFormulas that were not future-live. [2024-11-02 19:56:31,826 INFO L287 CfgBuilder]: Performing block encoding [2024-11-02 19:56:31,846 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-02 19:56:31,846 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-02 19:56:31,847 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 07:56:31 BoogieIcfgContainer [2024-11-02 19:56:31,847 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-02 19:56:31,850 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-02 19:56:31,851 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-02 19:56:31,853 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-02 19:56:31,853 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 07:56:31" (1/3) ... [2024-11-02 19:56:31,854 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@755c2354 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 07:56:31, skipping insertion in model container [2024-11-02 19:56:31,854 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 07:56:31" (2/3) ... [2024-11-02 19:56:31,854 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@755c2354 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 07:56:31, skipping insertion in model container [2024-11-02 19:56:31,855 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 07:56:31" (3/3) ... [2024-11-02 19:56:31,856 INFO L112 eAbstractionObserver]: Analyzing ICFG soft_float_4-2a.c.cil.c [2024-11-02 19:56:31,868 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-02 19:56:31,869 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-02 19:56:31,937 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-02 19:56:31,942 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;@4029ea86, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-02 19:56:31,942 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-02 19:56:31,946 INFO L276 IsEmpty]: Start isEmpty. Operand has 54 states, 41 states have (on average 1.4878048780487805) internal successors, (61), 42 states have internal predecessors, (61), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-02 19:56:31,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-02 19:56:31,955 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 19:56:31,956 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 19:56:31,957 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 19:56:31,963 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 19:56:31,963 INFO L85 PathProgramCache]: Analyzing trace with hash -2030319843, now seen corresponding path program 1 times [2024-11-02 19:56:31,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-02 19:56:31,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1356569587] [2024-11-02 19:56:31,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 19:56:31,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 19:56:32,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 19:56:32,208 INFO L255 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-02 19:56:32,215 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 19:56:32,384 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-02 19:56:32,384 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 19:56:32,466 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-02 19:56:32,468 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-02 19:56:32,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1356569587] [2024-11-02 19:56:32,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1356569587] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 19:56:32,469 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-02 19:56:32,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2024-11-02 19:56:32,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324277463] [2024-11-02 19:56:32,471 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-02 19:56:32,474 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-02 19:56:32,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-02 19:56:32,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-02 19:56:32,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-11-02 19:56:32,501 INFO L87 Difference]: Start difference. First operand has 54 states, 41 states have (on average 1.4878048780487805) internal successors, (61), 42 states have internal predecessors, (61), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-02 19:56:32,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 19:56:32,696 INFO L93 Difference]: Finished difference Result 128 states and 196 transitions. [2024-11-02 19:56:32,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-02 19:56:32,701 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2024-11-02 19:56:32,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 19:56:32,709 INFO L225 Difference]: With dead ends: 128 [2024-11-02 19:56:32,709 INFO L226 Difference]: Without dead ends: 71 [2024-11-02 19:56:32,712 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-11-02 19:56:32,716 INFO L432 NwaCegarLoop]: 64 mSDtfsCounter, 15 mSDsluCounter, 438 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 502 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 19:56:32,717 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 502 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 19:56:32,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-11-02 19:56:32,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 63. [2024-11-02 19:56:32,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 47 states have (on average 1.3191489361702127) internal successors, (62), 49 states have internal predecessors, (62), 10 states have call successors, (10), 4 states have call predecessors, (10), 5 states have return successors, (13), 9 states have call predecessors, (13), 9 states have call successors, (13) [2024-11-02 19:56:32,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 85 transitions. [2024-11-02 19:56:32,754 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 85 transitions. Word has length 31 [2024-11-02 19:56:32,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 19:56:32,754 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 85 transitions. [2024-11-02 19:56:32,755 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-02 19:56:32,755 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 85 transitions. [2024-11-02 19:56:32,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-02 19:56:32,757 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 19:56:32,757 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 19:56:32,757 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-02 19:56:32,758 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 19:56:32,758 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 19:56:32,758 INFO L85 PathProgramCache]: Analyzing trace with hash 565485640, now seen corresponding path program 1 times [2024-11-02 19:56:32,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-02 19:56:32,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1809629315] [2024-11-02 19:56:32,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 19:56:32,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 19:56:32,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 19:56:33,014 INFO L255 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-02 19:56:33,021 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 19:56:33,114 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-02 19:56:33,115 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 19:56:33,184 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-02 19:56:33,185 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-02 19:56:33,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1809629315] [2024-11-02 19:56:33,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1809629315] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-02 19:56:33,185 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-02 19:56:33,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 9 [2024-11-02 19:56:33,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611835130] [2024-11-02 19:56:33,187 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-02 19:56:33,189 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-02 19:56:33,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-02 19:56:33,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-02 19:56:33,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2024-11-02 19:56:33,191 INFO L87 Difference]: Start difference. First operand 63 states and 85 transitions. Second operand has 9 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-02 19:56:33,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 19:56:33,303 INFO L93 Difference]: Finished difference Result 118 states and 155 transitions. [2024-11-02 19:56:33,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-02 19:56:33,304 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 35 [2024-11-02 19:56:33,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 19:56:33,307 INFO L225 Difference]: With dead ends: 118 [2024-11-02 19:56:33,307 INFO L226 Difference]: Without dead ends: 86 [2024-11-02 19:56:33,310 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-11-02 19:56:33,311 INFO L432 NwaCegarLoop]: 60 mSDtfsCounter, 14 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 19:56:33,311 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 411 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 19:56:33,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2024-11-02 19:56:33,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 71. [2024-11-02 19:56:33,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 53 states have (on average 1.2830188679245282) internal successors, (68), 55 states have internal predecessors, (68), 11 states have call successors, (11), 5 states have call predecessors, (11), 6 states have return successors, (14), 10 states have call predecessors, (14), 10 states have call successors, (14) [2024-11-02 19:56:33,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 93 transitions. [2024-11-02 19:56:33,333 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 93 transitions. Word has length 35 [2024-11-02 19:56:33,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 19:56:33,334 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 93 transitions. [2024-11-02 19:56:33,334 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-02 19:56:33,334 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 93 transitions. [2024-11-02 19:56:33,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-02 19:56:33,336 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 19:56:33,336 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 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] [2024-11-02 19:56:33,336 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-02 19:56:33,339 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 19:56:33,340 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 19:56:33,340 INFO L85 PathProgramCache]: Analyzing trace with hash -686479404, now seen corresponding path program 1 times [2024-11-02 19:56:33,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-02 19:56:33,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1617080167] [2024-11-02 19:56:33,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 19:56:33,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 19:56:33,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 19:56:33,425 INFO L255 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-02 19:56:33,430 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 19:56:33,517 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-02 19:56:33,517 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 19:56:33,582 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-02 19:56:33,583 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-02 19:56:33,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1617080167] [2024-11-02 19:56:33,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1617080167] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-02 19:56:33,583 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-02 19:56:33,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [] total 9 [2024-11-02 19:56:33,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35966930] [2024-11-02 19:56:33,584 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-02 19:56:33,585 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-02 19:56:33,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-02 19:56:33,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-02 19:56:33,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-11-02 19:56:33,586 INFO L87 Difference]: Start difference. First operand 71 states and 93 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-02 19:56:33,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 19:56:33,717 INFO L93 Difference]: Finished difference Result 108 states and 141 transitions. [2024-11-02 19:56:33,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-02 19:56:33,718 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 39 [2024-11-02 19:56:33,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 19:56:33,720 INFO L225 Difference]: With dead ends: 108 [2024-11-02 19:56:33,720 INFO L226 Difference]: Without dead ends: 85 [2024-11-02 19:56:33,720 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-11-02 19:56:33,723 INFO L432 NwaCegarLoop]: 65 mSDtfsCounter, 13 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 19:56:33,724 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 501 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 19:56:33,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2024-11-02 19:56:33,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 79. [2024-11-02 19:56:33,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 59 states have (on average 1.271186440677966) internal successors, (75), 61 states have internal predecessors, (75), 12 states have call successors, (12), 6 states have call predecessors, (12), 7 states have return successors, (15), 11 states have call predecessors, (15), 11 states have call successors, (15) [2024-11-02 19:56:33,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 102 transitions. [2024-11-02 19:56:33,739 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 102 transitions. Word has length 39 [2024-11-02 19:56:33,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 19:56:33,740 INFO L471 AbstractCegarLoop]: Abstraction has 79 states and 102 transitions. [2024-11-02 19:56:33,740 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-02 19:56:33,740 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 102 transitions. [2024-11-02 19:56:33,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-02 19:56:33,744 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 19:56:33,745 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 19:56:33,745 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-02 19:56:33,745 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 19:56:33,745 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 19:56:33,746 INFO L85 PathProgramCache]: Analyzing trace with hash 461161469, now seen corresponding path program 2 times [2024-11-02 19:56:33,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-02 19:56:33,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [392875304] [2024-11-02 19:56:33,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 19:56:33,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 19:56:37,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 19:56:37,095 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-02 19:56:37,103 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 19:56:37,260 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-02 19:56:37,260 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 19:56:37,376 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-02 19:56:37,376 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-02 19:56:37,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [392875304] [2024-11-02 19:56:37,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [392875304] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-02 19:56:37,377 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-02 19:56:37,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2024-11-02 19:56:37,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941933913] [2024-11-02 19:56:37,377 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-02 19:56:37,378 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-02 19:56:37,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-02 19:56:37,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-02 19:56:37,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-11-02 19:56:37,379 INFO L87 Difference]: Start difference. First operand 79 states and 102 transitions. Second operand has 10 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-02 19:56:39,197 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-02 19:56:39,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 19:56:39,258 INFO L93 Difference]: Finished difference Result 90 states and 114 transitions. [2024-11-02 19:56:39,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-02 19:56:39,258 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 39 [2024-11-02 19:56:39,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 19:56:39,260 INFO L225 Difference]: With dead ends: 90 [2024-11-02 19:56:39,260 INFO L226 Difference]: Without dead ends: 88 [2024-11-02 19:56:39,260 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 66 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-11-02 19:56:39,261 INFO L432 NwaCegarLoop]: 64 mSDtfsCounter, 6 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2024-11-02 19:56:39,262 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 365 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 53 Invalid, 1 Unknown, 0 Unchecked, 1.9s Time] [2024-11-02 19:56:39,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2024-11-02 19:56:39,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 83. [2024-11-02 19:56:39,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 62 states have (on average 1.2580645161290323) internal successors, (78), 64 states have internal predecessors, (78), 12 states have call successors, (12), 7 states have call predecessors, (12), 8 states have return successors, (15), 11 states have call predecessors, (15), 11 states have call successors, (15) [2024-11-02 19:56:39,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 105 transitions. [2024-11-02 19:56:39,271 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 105 transitions. Word has length 39 [2024-11-02 19:56:39,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 19:56:39,272 INFO L471 AbstractCegarLoop]: Abstraction has 83 states and 105 transitions. [2024-11-02 19:56:39,272 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-02 19:56:39,272 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 105 transitions. [2024-11-02 19:56:39,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-02 19:56:39,274 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 19:56:39,274 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 19:56:39,274 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-02 19:56:39,274 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 19:56:39,275 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 19:56:39,275 INFO L85 PathProgramCache]: Analyzing trace with hash -1863687100, now seen corresponding path program 1 times [2024-11-02 19:56:39,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-02 19:56:39,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1106347374] [2024-11-02 19:56:39,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 19:56:39,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 19:56:39,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 19:56:39,315 INFO L255 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-02 19:56:39,317 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 19:56:39,383 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-02 19:56:39,383 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 19:56:39,480 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-02 19:56:39,481 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-02 19:56:39,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1106347374] [2024-11-02 19:56:39,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1106347374] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 19:56:39,481 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-02 19:56:39,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2024-11-02 19:56:39,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145470114] [2024-11-02 19:56:39,482 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-02 19:56:39,482 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-02 19:56:39,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-02 19:56:39,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-02 19:56:39,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-11-02 19:56:39,483 INFO L87 Difference]: Start difference. First operand 83 states and 105 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-02 19:56:39,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 19:56:39,569 INFO L93 Difference]: Finished difference Result 117 states and 149 transitions. [2024-11-02 19:56:39,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-02 19:56:39,570 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 44 [2024-11-02 19:56:39,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 19:56:39,571 INFO L225 Difference]: With dead ends: 117 [2024-11-02 19:56:39,572 INFO L226 Difference]: Without dead ends: 106 [2024-11-02 19:56:39,572 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-11-02 19:56:39,573 INFO L432 NwaCegarLoop]: 65 mSDtfsCounter, 29 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 421 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 19:56:39,573 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 421 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 19:56:39,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2024-11-02 19:56:39,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 97. [2024-11-02 19:56:39,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 71 states have (on average 1.2394366197183098) internal successors, (88), 75 states have internal predecessors, (88), 15 states have call successors, (15), 7 states have call predecessors, (15), 10 states have return successors, (21), 14 states have call predecessors, (21), 14 states have call successors, (21) [2024-11-02 19:56:39,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 124 transitions. [2024-11-02 19:56:39,596 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 124 transitions. Word has length 44 [2024-11-02 19:56:39,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 19:56:39,596 INFO L471 AbstractCegarLoop]: Abstraction has 97 states and 124 transitions. [2024-11-02 19:56:39,596 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-02 19:56:39,596 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 124 transitions. [2024-11-02 19:56:39,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-02 19:56:39,597 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 19:56:39,598 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 19:56:39,598 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-02 19:56:39,598 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 19:56:39,601 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 19:56:39,602 INFO L85 PathProgramCache]: Analyzing trace with hash -1162622522, now seen corresponding path program 1 times [2024-11-02 19:56:39,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-02 19:56:39,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [69473515] [2024-11-02 19:56:39,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 19:56:39,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 19:56:39,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 19:56:39,634 INFO L255 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-02 19:56:39,640 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 19:56:39,756 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-02 19:56:39,756 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 19:56:39,972 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-02 19:56:39,972 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-02 19:56:39,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [69473515] [2024-11-02 19:56:39,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [69473515] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-02 19:56:39,972 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-02 19:56:39,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11, 12] imperfect sequences [] total 17 [2024-11-02 19:56:39,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115559674] [2024-11-02 19:56:39,973 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-02 19:56:39,973 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-02 19:56:39,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-02 19:56:39,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-02 19:56:39,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2024-11-02 19:56:39,974 INFO L87 Difference]: Start difference. First operand 97 states and 124 transitions. Second operand has 17 states, 16 states have (on average 2.25) internal successors, (36), 14 states have internal predecessors, (36), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-02 19:56:40,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 19:56:40,268 INFO L93 Difference]: Finished difference Result 131 states and 168 transitions. [2024-11-02 19:56:40,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-02 19:56:40,268 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.25) internal successors, (36), 14 states have internal predecessors, (36), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 44 [2024-11-02 19:56:40,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 19:56:40,270 INFO L225 Difference]: With dead ends: 131 [2024-11-02 19:56:40,270 INFO L226 Difference]: Without dead ends: 124 [2024-11-02 19:56:40,271 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2024-11-02 19:56:40,271 INFO L432 NwaCegarLoop]: 71 mSDtfsCounter, 24 mSDsluCounter, 714 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 785 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-02 19:56:40,272 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 785 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-02 19:56:40,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2024-11-02 19:56:40,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 99. [2024-11-02 19:56:40,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 73 states have (on average 1.2328767123287672) internal successors, (90), 76 states have internal predecessors, (90), 15 states have call successors, (15), 7 states have call predecessors, (15), 10 states have return successors, (21), 15 states have call predecessors, (21), 14 states have call successors, (21) [2024-11-02 19:56:40,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 126 transitions. [2024-11-02 19:56:40,284 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 126 transitions. Word has length 44 [2024-11-02 19:56:40,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 19:56:40,284 INFO L471 AbstractCegarLoop]: Abstraction has 99 states and 126 transitions. [2024-11-02 19:56:40,285 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.25) internal successors, (36), 14 states have internal predecessors, (36), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-02 19:56:40,285 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 126 transitions. [2024-11-02 19:56:40,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-02 19:56:40,286 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 19:56:40,286 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 19:56:40,286 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-02 19:56:40,286 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 19:56:40,287 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 19:56:40,287 INFO L85 PathProgramCache]: Analyzing trace with hash -977013140, now seen corresponding path program 1 times [2024-11-02 19:56:40,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-02 19:56:40,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [900423225] [2024-11-02 19:56:40,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 19:56:40,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 19:56:40,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 19:56:40,308 INFO L255 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-02 19:56:40,310 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 19:56:40,421 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-02 19:56:40,422 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 19:56:40,598 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-02 19:56:40,598 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-02 19:56:40,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [900423225] [2024-11-02 19:56:40,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [900423225] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 19:56:40,599 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-02 19:56:40,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 15 [2024-11-02 19:56:40,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761214961] [2024-11-02 19:56:40,599 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-02 19:56:40,599 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-02 19:56:40,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-02 19:56:40,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-02 19:56:40,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2024-11-02 19:56:40,601 INFO L87 Difference]: Start difference. First operand 99 states and 126 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 13 states have internal predecessors, (38), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-02 19:56:40,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 19:56:40,873 INFO L93 Difference]: Finished difference Result 138 states and 176 transitions. [2024-11-02 19:56:40,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-02 19:56:40,874 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 13 states have internal predecessors, (38), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 46 [2024-11-02 19:56:40,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 19:56:40,876 INFO L225 Difference]: With dead ends: 138 [2024-11-02 19:56:40,876 INFO L226 Difference]: Without dead ends: 130 [2024-11-02 19:56:40,876 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2024-11-02 19:56:40,877 INFO L432 NwaCegarLoop]: 58 mSDtfsCounter, 23 mSDsluCounter, 704 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 762 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-02 19:56:40,878 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 762 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-02 19:56:40,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2024-11-02 19:56:40,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 110. [2024-11-02 19:56:40,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 82 states have (on average 1.2195121951219512) internal successors, (100), 84 states have internal predecessors, (100), 16 states have call successors, (16), 7 states have call predecessors, (16), 11 states have return successors, (23), 18 states have call predecessors, (23), 15 states have call successors, (23) [2024-11-02 19:56:40,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 139 transitions. [2024-11-02 19:56:40,890 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 139 transitions. Word has length 46 [2024-11-02 19:56:40,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 19:56:40,891 INFO L471 AbstractCegarLoop]: Abstraction has 110 states and 139 transitions. [2024-11-02 19:56:40,891 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 13 states have internal predecessors, (38), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-02 19:56:40,891 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 139 transitions. [2024-11-02 19:56:40,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-02 19:56:40,892 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 19:56:40,892 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 19:56:40,895 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-02 19:56:40,896 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 19:56:40,896 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 19:56:40,897 INFO L85 PathProgramCache]: Analyzing trace with hash -919754838, now seen corresponding path program 1 times [2024-11-02 19:56:40,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-02 19:56:40,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1232133909] [2024-11-02 19:56:40,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 19:56:40,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 19:56:40,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 19:56:40,926 INFO L255 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-02 19:56:40,927 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 19:56:40,966 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-02 19:56:40,966 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 19:56:41,010 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-02 19:56:41,011 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-02 19:56:41,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1232133909] [2024-11-02 19:56:41,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1232133909] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-02 19:56:41,011 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-02 19:56:41,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2024-11-02 19:56:41,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118783125] [2024-11-02 19:56:41,012 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-02 19:56:41,012 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-02 19:56:41,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-02 19:56:41,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-02 19:56:41,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-02 19:56:41,013 INFO L87 Difference]: Start difference. First operand 110 states and 139 transitions. Second operand has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2024-11-02 19:56:41,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 19:56:41,061 INFO L93 Difference]: Finished difference Result 118 states and 146 transitions. [2024-11-02 19:56:41,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-02 19:56:41,062 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 46 [2024-11-02 19:56:41,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 19:56:41,063 INFO L225 Difference]: With dead ends: 118 [2024-11-02 19:56:41,063 INFO L226 Difference]: Without dead ends: 103 [2024-11-02 19:56:41,063 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-11-02 19:56:41,064 INFO L432 NwaCegarLoop]: 64 mSDtfsCounter, 3 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-02 19:56:41,064 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 437 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-02 19:56:41,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2024-11-02 19:56:41,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2024-11-02 19:56:41,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 77 states have (on average 1.2077922077922079) internal successors, (93), 80 states have internal predecessors, (93), 14 states have call successors, (14), 7 states have call predecessors, (14), 11 states have return successors, (20), 15 states have call predecessors, (20), 13 states have call successors, (20) [2024-11-02 19:56:41,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 127 transitions. [2024-11-02 19:56:41,073 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 127 transitions. Word has length 46 [2024-11-02 19:56:41,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 19:56:41,074 INFO L471 AbstractCegarLoop]: Abstraction has 103 states and 127 transitions. [2024-11-02 19:56:41,074 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2024-11-02 19:56:41,074 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 127 transitions. [2024-11-02 19:56:41,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-02 19:56:41,075 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 19:56:41,075 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 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] [2024-11-02 19:56:41,075 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-02 19:56:41,075 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 19:56:41,075 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 19:56:41,076 INFO L85 PathProgramCache]: Analyzing trace with hash -168643793, now seen corresponding path program 1 times [2024-11-02 19:56:41,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-02 19:56:41,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1588159188] [2024-11-02 19:56:41,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 19:56:41,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 19:56:41,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 19:56:41,157 INFO L255 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-02 19:56:41,160 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 19:56:41,315 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-02 19:56:41,315 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 19:56:41,724 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-02 19:56:41,724 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-02 19:56:41,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1588159188] [2024-11-02 19:56:41,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1588159188] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 19:56:41,725 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-02 19:56:41,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2024-11-02 19:56:41,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287191018] [2024-11-02 19:56:41,725 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-02 19:56:41,726 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-02 19:56:41,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-02 19:56:41,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-02 19:56:41,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=496, Unknown=0, NotChecked=0, Total=552 [2024-11-02 19:56:41,727 INFO L87 Difference]: Start difference. First operand 103 states and 127 transitions. Second operand has 24 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 20 states have internal predecessors, (43), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-02 19:56:42,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 19:56:42,771 INFO L93 Difference]: Finished difference Result 150 states and 201 transitions. [2024-11-02 19:56:42,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-02 19:56:42,772 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 20 states have internal predecessors, (43), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 48 [2024-11-02 19:56:42,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 19:56:42,773 INFO L225 Difference]: With dead ends: 150 [2024-11-02 19:56:42,774 INFO L226 Difference]: Without dead ends: 137 [2024-11-02 19:56:42,775 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=156, Invalid=1404, Unknown=0, NotChecked=0, Total=1560 [2024-11-02 19:56:42,775 INFO L432 NwaCegarLoop]: 69 mSDtfsCounter, 73 mSDsluCounter, 920 mSDsCounter, 0 mSdLazyCounter, 542 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 989 SdHoareTripleChecker+Invalid, 562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-02 19:56:42,776 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 989 Invalid, 562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 542 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-02 19:56:42,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2024-11-02 19:56:42,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 110. [2024-11-02 19:56:42,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 81 states have (on average 1.2098765432098766) internal successors, (98), 86 states have internal predecessors, (98), 16 states have call successors, (16), 7 states have call predecessors, (16), 12 states have return successors, (29), 16 states have call predecessors, (29), 14 states have call successors, (29) [2024-11-02 19:56:42,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 143 transitions. [2024-11-02 19:56:42,796 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 143 transitions. Word has length 48 [2024-11-02 19:56:42,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 19:56:42,796 INFO L471 AbstractCegarLoop]: Abstraction has 110 states and 143 transitions. [2024-11-02 19:56:42,796 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 20 states have internal predecessors, (43), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-02 19:56:42,797 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 143 transitions. [2024-11-02 19:56:42,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-02 19:56:42,798 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 19:56:42,798 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 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] [2024-11-02 19:56:42,798 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-02 19:56:42,799 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 19:56:42,799 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 19:56:42,799 INFO L85 PathProgramCache]: Analyzing trace with hash 291178745, now seen corresponding path program 2 times [2024-11-02 19:56:42,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-02 19:56:42,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1013009271] [2024-11-02 19:56:42,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 19:56:42,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 19:56:42,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 19:56:42,854 INFO L255 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-02 19:56:42,858 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 19:56:43,001 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-02 19:56:43,001 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 19:56:43,386 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-02 19:56:43,386 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-02 19:56:43,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1013009271] [2024-11-02 19:56:43,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1013009271] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 19:56:43,387 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-02 19:56:43,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2024-11-02 19:56:43,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068366819] [2024-11-02 19:56:43,387 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-02 19:56:43,388 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-02 19:56:43,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-02 19:56:43,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-02 19:56:43,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=496, Unknown=0, NotChecked=0, Total=552 [2024-11-02 19:56:43,389 INFO L87 Difference]: Start difference. First operand 110 states and 143 transitions. Second operand has 24 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 20 states have internal predecessors, (43), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-02 19:56:44,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 19:56:44,287 INFO L93 Difference]: Finished difference Result 149 states and 200 transitions. [2024-11-02 19:56:44,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-02 19:56:44,288 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 20 states have internal predecessors, (43), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 48 [2024-11-02 19:56:44,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 19:56:44,290 INFO L225 Difference]: With dead ends: 149 [2024-11-02 19:56:44,290 INFO L226 Difference]: Without dead ends: 134 [2024-11-02 19:56:44,291 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=137, Invalid=1269, Unknown=0, NotChecked=0, Total=1406 [2024-11-02 19:56:44,291 INFO L432 NwaCegarLoop]: 70 mSDtfsCounter, 57 mSDsluCounter, 1032 mSDsCounter, 0 mSdLazyCounter, 539 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 1102 SdHoareTripleChecker+Invalid, 561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-02 19:56:44,292 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 1102 Invalid, 561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 539 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-02 19:56:44,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2024-11-02 19:56:44,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 108. [2024-11-02 19:56:44,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 79 states have (on average 1.2025316455696202) internal successors, (95), 83 states have internal predecessors, (95), 17 states have call successors, (17), 7 states have call predecessors, (17), 11 states have return successors, (31), 17 states have call predecessors, (31), 15 states have call successors, (31) [2024-11-02 19:56:44,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 143 transitions. [2024-11-02 19:56:44,313 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 143 transitions. Word has length 48 [2024-11-02 19:56:44,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 19:56:44,314 INFO L471 AbstractCegarLoop]: Abstraction has 108 states and 143 transitions. [2024-11-02 19:56:44,315 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 20 states have internal predecessors, (43), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-02 19:56:44,315 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 143 transitions. [2024-11-02 19:56:44,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-02 19:56:44,315 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 19:56:44,316 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 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] [2024-11-02 19:56:44,316 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-02 19:56:44,316 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 19:56:44,316 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 19:56:44,316 INFO L85 PathProgramCache]: Analyzing trace with hash -744862915, now seen corresponding path program 1 times [2024-11-02 19:56:44,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-02 19:56:44,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [396697384] [2024-11-02 19:56:44,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 19:56:44,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 19:56:55,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 19:56:55,293 INFO L255 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-02 19:56:55,298 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 19:57:00,265 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-02 19:57:00,265 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 19:57:00,630 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-02 19:57:00,631 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-02 19:57:00,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [396697384] [2024-11-02 19:57:00,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [396697384] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-02 19:57:00,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-02 19:57:00,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [12] total 18 [2024-11-02 19:57:00,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173966464] [2024-11-02 19:57:00,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 19:57:00,632 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-02 19:57:00,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-02 19:57:00,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-02 19:57:00,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=232, Unknown=1, NotChecked=0, Total=306 [2024-11-02 19:57:00,633 INFO L87 Difference]: Start difference. First operand 108 states and 143 transitions. Second operand has 9 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-02 19:57:02,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 19:57:02,779 INFO L93 Difference]: Finished difference Result 122 states and 163 transitions. [2024-11-02 19:57:02,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-02 19:57:02,780 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 49 [2024-11-02 19:57:02,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 19:57:02,782 INFO L225 Difference]: With dead ends: 122 [2024-11-02 19:57:02,782 INFO L226 Difference]: Without dead ends: 120 [2024-11-02 19:57:02,782 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=88, Invalid=291, Unknown=1, NotChecked=0, Total=380 [2024-11-02 19:57:02,783 INFO L432 NwaCegarLoop]: 62 mSDtfsCounter, 14 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-02 19:57:02,783 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 467 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-02 19:57:02,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2024-11-02 19:57:02,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 113. [2024-11-02 19:57:02,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 82 states have (on average 1.1951219512195121) internal successors, (98), 87 states have internal predecessors, (98), 18 states have call successors, (18), 8 states have call predecessors, (18), 12 states have return successors, (32), 17 states have call predecessors, (32), 16 states have call successors, (32) [2024-11-02 19:57:02,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 148 transitions. [2024-11-02 19:57:02,797 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 148 transitions. Word has length 49 [2024-11-02 19:57:02,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 19:57:02,797 INFO L471 AbstractCegarLoop]: Abstraction has 113 states and 148 transitions. [2024-11-02 19:57:02,797 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-02 19:57:02,798 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 148 transitions. [2024-11-02 19:57:02,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-02 19:57:02,799 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 19:57:02,799 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 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] [2024-11-02 19:57:02,799 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-02 19:57:02,799 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 19:57:02,799 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 19:57:02,800 INFO L85 PathProgramCache]: Analyzing trace with hash -325172767, now seen corresponding path program 1 times [2024-11-02 19:57:02,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-02 19:57:02,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2057069622] [2024-11-02 19:57:02,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 19:57:02,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 19:57:02,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 19:57:02,855 INFO L255 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-02 19:57:02,859 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 19:57:03,035 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-02 19:57:03,036 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 19:57:03,346 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-02 19:57:03,346 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-02 19:57:03,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2057069622] [2024-11-02 19:57:03,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [2057069622] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 19:57:03,346 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-02 19:57:03,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 23 [2024-11-02 19:57:03,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174709610] [2024-11-02 19:57:03,347 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-02 19:57:03,347 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-02 19:57:03,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-02 19:57:03,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-02 19:57:03,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2024-11-02 19:57:03,348 INFO L87 Difference]: Start difference. First operand 113 states and 148 transitions. Second operand has 23 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 6 states have call successors, (8), 2 states have call predecessors, (8), 5 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2024-11-02 19:57:03,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 19:57:03,755 INFO L93 Difference]: Finished difference Result 140 states and 186 transitions. [2024-11-02 19:57:03,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-02 19:57:03,756 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 6 states have call successors, (8), 2 states have call predecessors, (8), 5 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) Word has length 50 [2024-11-02 19:57:03,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 19:57:03,756 INFO L225 Difference]: With dead ends: 140 [2024-11-02 19:57:03,757 INFO L226 Difference]: Without dead ends: 113 [2024-11-02 19:57:03,757 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 74 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=121, Invalid=809, Unknown=0, NotChecked=0, Total=930 [2024-11-02 19:57:03,758 INFO L432 NwaCegarLoop]: 69 mSDtfsCounter, 67 mSDsluCounter, 1035 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 1104 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-02 19:57:03,758 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 1104 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 357 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-02 19:57:03,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2024-11-02 19:57:03,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 97. [2024-11-02 19:57:03,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 70 states have (on average 1.2285714285714286) internal successors, (86), 75 states have internal predecessors, (86), 16 states have call successors, (16), 6 states have call predecessors, (16), 10 states have return successors, (29), 15 states have call predecessors, (29), 14 states have call successors, (29) [2024-11-02 19:57:03,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 131 transitions. [2024-11-02 19:57:03,769 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 131 transitions. Word has length 50 [2024-11-02 19:57:03,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 19:57:03,769 INFO L471 AbstractCegarLoop]: Abstraction has 97 states and 131 transitions. [2024-11-02 19:57:03,769 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 6 states have call successors, (8), 2 states have call predecessors, (8), 5 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2024-11-02 19:57:03,769 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 131 transitions. [2024-11-02 19:57:03,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-02 19:57:03,770 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 19:57:03,770 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 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] [2024-11-02 19:57:03,770 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-02 19:57:03,770 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 19:57:03,771 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 19:57:03,771 INFO L85 PathProgramCache]: Analyzing trace with hash -477005395, now seen corresponding path program 1 times [2024-11-02 19:57:03,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-02 19:57:03,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [664778832] [2024-11-02 19:57:03,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 19:57:03,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 19:57:03,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 19:57:03,816 INFO L255 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-02 19:57:03,818 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 19:57:03,870 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-02 19:57:03,870 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 19:57:03,918 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-02 19:57:03,918 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-02 19:57:03,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [664778832] [2024-11-02 19:57:03,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [664778832] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 19:57:03,918 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-02 19:57:03,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2024-11-02 19:57:03,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493275257] [2024-11-02 19:57:03,918 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-02 19:57:03,919 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-02 19:57:03,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-02 19:57:03,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-02 19:57:03,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2024-11-02 19:57:03,920 INFO L87 Difference]: Start difference. First operand 97 states and 131 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 7 states have internal predecessors, (42), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-02 19:57:03,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 19:57:03,983 INFO L93 Difference]: Finished difference Result 145 states and 182 transitions. [2024-11-02 19:57:03,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-02 19:57:03,984 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 7 states have internal predecessors, (42), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 54 [2024-11-02 19:57:03,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 19:57:03,985 INFO L225 Difference]: With dead ends: 145 [2024-11-02 19:57:03,985 INFO L226 Difference]: Without dead ends: 85 [2024-11-02 19:57:03,986 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-11-02 19:57:03,987 INFO L432 NwaCegarLoop]: 64 mSDtfsCounter, 6 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-02 19:57:03,987 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 493 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-02 19:57:03,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2024-11-02 19:57:03,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2024-11-02 19:57:03,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 62 states have (on average 1.2419354838709677) internal successors, (77), 67 states have internal predecessors, (77), 13 states have call successors, (13), 5 states have call predecessors, (13), 9 states have return successors, (26), 12 states have call predecessors, (26), 12 states have call successors, (26) [2024-11-02 19:57:03,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 116 transitions. [2024-11-02 19:57:03,999 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 116 transitions. Word has length 54 [2024-11-02 19:57:03,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 19:57:03,999 INFO L471 AbstractCegarLoop]: Abstraction has 85 states and 116 transitions. [2024-11-02 19:57:04,000 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 7 states have internal predecessors, (42), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-02 19:57:04,000 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 116 transitions. [2024-11-02 19:57:04,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-02 19:57:04,000 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 19:57:04,001 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 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] [2024-11-02 19:57:04,001 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-02 19:57:04,001 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 19:57:04,001 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 19:57:04,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1846975685, now seen corresponding path program 1 times [2024-11-02 19:57:04,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-02 19:57:04,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1863288236] [2024-11-02 19:57:04,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 19:57:04,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 19:57:22,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 19:57:22,040 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-02 19:57:22,042 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 19:57:42,750 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-02 19:57:42,750 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 19:57:47,152 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-02 19:57:47,153 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-02 19:57:47,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1863288236] [2024-11-02 19:57:47,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1863288236] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-02 19:57:47,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-02 19:57:47,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [13] total 20 [2024-11-02 19:57:47,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43065270] [2024-11-02 19:57:47,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 19:57:47,154 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-02 19:57:47,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-02 19:57:47,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-02 19:57:47,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=291, Unknown=5, NotChecked=0, Total=380 [2024-11-02 19:57:47,155 INFO L87 Difference]: Start difference. First operand 85 states and 116 transitions. Second operand has 10 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 states have internal predecessors, (29), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-02 19:57:47,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 19:57:47,692 INFO L93 Difference]: Finished difference Result 98 states and 134 transitions. [2024-11-02 19:57:47,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-02 19:57:47,693 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 states have internal predecessors, (29), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 50 [2024-11-02 19:57:47,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 19:57:47,694 INFO L225 Difference]: With dead ends: 98 [2024-11-02 19:57:47,694 INFO L226 Difference]: Without dead ends: 94 [2024-11-02 19:57:47,694 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 24.9s TimeCoverageRelationStatistics Valid=100, Invalid=357, Unknown=5, NotChecked=0, Total=462 [2024-11-02 19:57:47,695 INFO L432 NwaCegarLoop]: 64 mSDtfsCounter, 21 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 416 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-02 19:57:47,695 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 416 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-02 19:57:47,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2024-11-02 19:57:47,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 82. [2024-11-02 19:57:47,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 61 states have (on average 1.2295081967213115) internal successors, (75), 64 states have internal predecessors, (75), 12 states have call successors, (12), 5 states have call predecessors, (12), 8 states have return successors, (25), 12 states have call predecessors, (25), 11 states have call successors, (25) [2024-11-02 19:57:47,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 112 transitions. [2024-11-02 19:57:47,706 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 112 transitions. Word has length 50 [2024-11-02 19:57:47,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 19:57:47,706 INFO L471 AbstractCegarLoop]: Abstraction has 82 states and 112 transitions. [2024-11-02 19:57:47,706 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 states have internal predecessors, (29), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-02 19:57:47,706 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 112 transitions. [2024-11-02 19:57:47,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-02 19:57:47,707 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 19:57:47,707 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2024-11-02 19:57:47,707 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-02 19:57:47,707 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 19:57:47,708 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 19:57:47,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1592416888, now seen corresponding path program 1 times [2024-11-02 19:57:47,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-02 19:57:47,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1760709187] [2024-11-02 19:57:47,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 19:57:47,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 19:57:47,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 19:57:47,779 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-02 19:57:47,781 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 19:57:47,953 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-02 19:57:47,953 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 19:57:48,226 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-02 19:57:48,226 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-02 19:57:48,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1760709187] [2024-11-02 19:57:48,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1760709187] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 19:57:48,227 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-02 19:57:48,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2024-11-02 19:57:48,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238004758] [2024-11-02 19:57:48,227 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-02 19:57:48,227 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-02 19:57:48,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-02 19:57:48,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-02 19:57:48,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-11-02 19:57:48,228 INFO L87 Difference]: Start difference. First operand 82 states and 112 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-02 19:57:48,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 19:57:48,556 INFO L93 Difference]: Finished difference Result 111 states and 164 transitions. [2024-11-02 19:57:48,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-02 19:57:48,557 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 54 [2024-11-02 19:57:48,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 19:57:48,558 INFO L225 Difference]: With dead ends: 111 [2024-11-02 19:57:48,558 INFO L226 Difference]: Without dead ends: 98 [2024-11-02 19:57:48,559 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2024-11-02 19:57:48,559 INFO L432 NwaCegarLoop]: 64 mSDtfsCounter, 46 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 442 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-02 19:57:48,559 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 442 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-02 19:57:48,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2024-11-02 19:57:48,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 85. [2024-11-02 19:57:48,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 63 states have (on average 1.2222222222222223) internal successors, (77), 67 states have internal predecessors, (77), 12 states have call successors, (12), 5 states have call predecessors, (12), 9 states have return successors, (28), 12 states have call predecessors, (28), 11 states have call successors, (28) [2024-11-02 19:57:48,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 117 transitions. [2024-11-02 19:57:48,578 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 117 transitions. Word has length 54 [2024-11-02 19:57:48,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 19:57:48,578 INFO L471 AbstractCegarLoop]: Abstraction has 85 states and 117 transitions. [2024-11-02 19:57:48,578 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-02 19:57:48,579 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 117 transitions. [2024-11-02 19:57:48,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-02 19:57:48,579 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 19:57:48,579 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2024-11-02 19:57:48,580 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-02 19:57:48,580 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 19:57:48,582 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 19:57:48,582 INFO L85 PathProgramCache]: Analyzing trace with hash -1756521076, now seen corresponding path program 2 times [2024-11-02 19:57:48,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-02 19:57:48,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1433181818] [2024-11-02 19:57:48,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 19:57:48,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 19:57:48,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 19:57:48,661 INFO L255 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-02 19:57:48,664 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 19:57:48,946 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-02 19:57:48,947 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 19:57:49,626 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-02 19:57:49,626 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-02 19:57:49,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1433181818] [2024-11-02 19:57:49,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1433181818] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 19:57:49,626 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-02 19:57:49,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 16 [2024-11-02 19:57:49,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660202601] [2024-11-02 19:57:49,627 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-02 19:57:49,627 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-02 19:57:49,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-02 19:57:49,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-02 19:57:49,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2024-11-02 19:57:49,628 INFO L87 Difference]: Start difference. First operand 85 states and 117 transitions. Second operand has 16 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-02 19:57:50,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 19:57:50,469 INFO L93 Difference]: Finished difference Result 116 states and 169 transitions. [2024-11-02 19:57:50,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-02 19:57:50,470 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 54 [2024-11-02 19:57:50,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 19:57:50,471 INFO L225 Difference]: With dead ends: 116 [2024-11-02 19:57:50,471 INFO L226 Difference]: Without dead ends: 107 [2024-11-02 19:57:50,472 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 90 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2024-11-02 19:57:50,472 INFO L432 NwaCegarLoop]: 80 mSDtfsCounter, 27 mSDsluCounter, 752 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 832 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-02 19:57:50,473 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 832 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-02 19:57:50,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2024-11-02 19:57:50,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 102. [2024-11-02 19:57:50,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 75 states have (on average 1.2133333333333334) internal successors, (91), 81 states have internal predecessors, (91), 14 states have call successors, (14), 5 states have call predecessors, (14), 12 states have return successors, (47), 15 states have call predecessors, (47), 13 states have call successors, (47) [2024-11-02 19:57:50,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 152 transitions. [2024-11-02 19:57:50,482 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 152 transitions. Word has length 54 [2024-11-02 19:57:50,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 19:57:50,483 INFO L471 AbstractCegarLoop]: Abstraction has 102 states and 152 transitions. [2024-11-02 19:57:50,483 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-02 19:57:50,483 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 152 transitions. [2024-11-02 19:57:50,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-11-02 19:57:50,484 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 19:57:50,484 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2024-11-02 19:57:50,484 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-02 19:57:50,484 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 19:57:50,484 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 19:57:50,484 INFO L85 PathProgramCache]: Analyzing trace with hash -177633806, now seen corresponding path program 1 times [2024-11-02 19:57:50,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-02 19:57:50,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [59825505] [2024-11-02 19:57:50,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 19:57:50,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 19:57:50,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 19:57:50,536 INFO L255 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-02 19:57:50,538 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 19:57:50,679 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-02 19:57:50,679 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 19:57:50,892 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-02 19:57:50,892 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-02 19:57:50,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [59825505] [2024-11-02 19:57:50,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [59825505] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 19:57:50,893 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-02 19:57:50,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2024-11-02 19:57:50,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222310374] [2024-11-02 19:57:50,893 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-02 19:57:50,893 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-02 19:57:50,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-02 19:57:50,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-02 19:57:50,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-11-02 19:57:50,894 INFO L87 Difference]: Start difference. First operand 102 states and 152 transitions. Second operand has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 11 states have internal predecessors, (45), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-02 19:57:51,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 19:57:51,068 INFO L93 Difference]: Finished difference Result 111 states and 161 transitions. [2024-11-02 19:57:51,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-02 19:57:51,068 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 11 states have internal predecessors, (45), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 63 [2024-11-02 19:57:51,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 19:57:51,069 INFO L225 Difference]: With dead ends: 111 [2024-11-02 19:57:51,069 INFO L226 Difference]: Without dead ends: 98 [2024-11-02 19:57:51,070 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2024-11-02 19:57:51,070 INFO L432 NwaCegarLoop]: 67 mSDtfsCounter, 22 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 19:57:51,071 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 367 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 19:57:51,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2024-11-02 19:57:51,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 88. [2024-11-02 19:57:51,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 65 states have (on average 1.2153846153846153) internal successors, (79), 70 states have internal predecessors, (79), 12 states have call successors, (12), 5 states have call predecessors, (12), 10 states have return successors, (31), 12 states have call predecessors, (31), 11 states have call successors, (31) [2024-11-02 19:57:51,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 122 transitions. [2024-11-02 19:57:51,081 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 122 transitions. Word has length 63 [2024-11-02 19:57:51,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 19:57:51,081 INFO L471 AbstractCegarLoop]: Abstraction has 88 states and 122 transitions. [2024-11-02 19:57:51,081 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 11 states have internal predecessors, (45), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-02 19:57:51,081 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 122 transitions. [2024-11-02 19:57:51,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-11-02 19:57:51,083 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 19:57:51,083 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2024-11-02 19:57:51,083 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-02 19:57:51,083 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 19:57:51,084 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 19:57:51,084 INFO L85 PathProgramCache]: Analyzing trace with hash -378794195, now seen corresponding path program 1 times [2024-11-02 19:57:51,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-02 19:57:51,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [192077086] [2024-11-02 19:57:51,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 19:57:51,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 19:57:51,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 19:57:51,165 INFO L255 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-02 19:57:51,167 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 19:57:51,299 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-02 19:57:51,299 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 19:57:51,496 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-02 19:57:51,497 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-02 19:57:51,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [192077086] [2024-11-02 19:57:51,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [192077086] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 19:57:51,497 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-02 19:57:51,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2024-11-02 19:57:51,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716316682] [2024-11-02 19:57:51,497 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-02 19:57:51,498 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-02 19:57:51,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-02 19:57:51,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-02 19:57:51,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-11-02 19:57:51,499 INFO L87 Difference]: Start difference. First operand 88 states and 122 transitions. Second operand has 11 states, 11 states have (on average 4.0) internal successors, (44), 11 states have internal predecessors, (44), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-02 19:57:51,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 19:57:51,683 INFO L93 Difference]: Finished difference Result 109 states and 154 transitions. [2024-11-02 19:57:51,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-02 19:57:51,684 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 11 states have internal predecessors, (44), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 63 [2024-11-02 19:57:51,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 19:57:51,685 INFO L225 Difference]: With dead ends: 109 [2024-11-02 19:57:51,685 INFO L226 Difference]: Without dead ends: 95 [2024-11-02 19:57:51,686 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2024-11-02 19:57:51,686 INFO L432 NwaCegarLoop]: 63 mSDtfsCounter, 57 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 19:57:51,687 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 391 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 19:57:51,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2024-11-02 19:57:51,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 85. [2024-11-02 19:57:51,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 63 states have (on average 1.2063492063492063) internal successors, (76), 67 states have internal predecessors, (76), 12 states have call successors, (12), 5 states have call predecessors, (12), 9 states have return successors, (28), 12 states have call predecessors, (28), 11 states have call successors, (28) [2024-11-02 19:57:51,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 116 transitions. [2024-11-02 19:57:51,700 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 116 transitions. Word has length 63 [2024-11-02 19:57:51,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 19:57:51,701 INFO L471 AbstractCegarLoop]: Abstraction has 85 states and 116 transitions. [2024-11-02 19:57:51,701 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 11 states have internal predecessors, (44), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-02 19:57:51,701 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 116 transitions. [2024-11-02 19:57:51,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-11-02 19:57:51,702 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 19:57:51,702 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2024-11-02 19:57:51,702 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-11-02 19:57:51,702 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 19:57:51,702 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 19:57:51,703 INFO L85 PathProgramCache]: Analyzing trace with hash -942967955, now seen corresponding path program 1 times [2024-11-02 19:57:51,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-02 19:57:51,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [99860743] [2024-11-02 19:57:51,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 19:57:51,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 19:57:51,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 19:57:51,792 INFO L255 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-02 19:57:51,795 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 19:57:51,968 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-02 19:57:51,969 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 19:57:52,385 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-02 19:57:52,385 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-02 19:57:52,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [99860743] [2024-11-02 19:57:52,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [99860743] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 19:57:52,385 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-02 19:57:52,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2024-11-02 19:57:52,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16083218] [2024-11-02 19:57:52,386 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-02 19:57:52,386 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-02 19:57:52,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-02 19:57:52,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-02 19:57:52,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2024-11-02 19:57:52,387 INFO L87 Difference]: Start difference. First operand 85 states and 116 transitions. Second operand has 17 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 15 states have internal predecessors, (55), 6 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2024-11-02 19:57:52,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 19:57:52,772 INFO L93 Difference]: Finished difference Result 111 states and 153 transitions. [2024-11-02 19:57:52,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-02 19:57:52,773 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 15 states have internal predecessors, (55), 6 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) Word has length 63 [2024-11-02 19:57:52,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 19:57:52,774 INFO L225 Difference]: With dead ends: 111 [2024-11-02 19:57:52,774 INFO L226 Difference]: Without dead ends: 102 [2024-11-02 19:57:52,774 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2024-11-02 19:57:52,775 INFO L432 NwaCegarLoop]: 64 mSDtfsCounter, 22 mSDsluCounter, 531 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 595 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-02 19:57:52,775 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 595 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-02 19:57:52,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2024-11-02 19:57:52,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 85. [2024-11-02 19:57:52,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 63 states have (on average 1.2063492063492063) internal successors, (76), 67 states have internal predecessors, (76), 12 states have call successors, (12), 5 states have call predecessors, (12), 9 states have return successors, (27), 12 states have call predecessors, (27), 11 states have call successors, (27) [2024-11-02 19:57:52,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 115 transitions. [2024-11-02 19:57:52,784 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 115 transitions. Word has length 63 [2024-11-02 19:57:52,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 19:57:52,784 INFO L471 AbstractCegarLoop]: Abstraction has 85 states and 115 transitions. [2024-11-02 19:57:52,785 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 15 states have internal predecessors, (55), 6 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2024-11-02 19:57:52,785 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 115 transitions. [2024-11-02 19:57:52,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-11-02 19:57:52,785 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 19:57:52,786 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2024-11-02 19:57:52,786 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-11-02 19:57:52,786 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 19:57:52,786 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 19:57:52,786 INFO L85 PathProgramCache]: Analyzing trace with hash -2130957302, now seen corresponding path program 1 times [2024-11-02 19:57:52,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-02 19:57:52,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [910356616] [2024-11-02 19:57:52,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 19:57:52,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 19:57:52,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 19:57:52,829 INFO L255 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-02 19:57:52,831 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 19:57:52,924 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-02 19:57:52,924 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 19:57:53,098 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-02 19:57:53,098 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-02 19:57:53,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [910356616] [2024-11-02 19:57:53,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [910356616] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 19:57:53,098 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-02 19:57:53,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2024-11-02 19:57:53,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789130927] [2024-11-02 19:57:53,098 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-02 19:57:53,099 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-02 19:57:53,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-02 19:57:53,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-02 19:57:53,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-11-02 19:57:53,100 INFO L87 Difference]: Start difference. First operand 85 states and 115 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6)