/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/s3_srvr_2a_alt.BV.c.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.5-dev-356b6ba-m [2024-10-31 15:04:15,748 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-31 15:04:15,827 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Bitvector.epf [2024-10-31 15:04:15,863 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-31 15:04:15,866 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-31 15:04:15,868 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-31 15:04:15,868 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-31 15:04:15,869 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-31 15:04:15,869 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-31 15:04:15,870 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-31 15:04:15,870 INFO L153 SettingsManager]: * Use SBE=true [2024-10-31 15:04:15,870 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-31 15:04:15,871 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-31 15:04:15,872 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-31 15:04:15,873 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-31 15:04:15,873 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-31 15:04:15,874 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-31 15:04:15,876 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-31 15:04:15,876 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-31 15:04:15,876 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-31 15:04:15,876 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-10-31 15:04:15,879 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-31 15:04:15,880 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-10-31 15:04:15,880 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-31 15:04:15,880 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-31 15:04:15,880 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-31 15:04:15,881 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-31 15:04:15,881 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-31 15:04:15,881 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-31 15:04:15,881 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-31 15:04:15,882 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 15:04:15,882 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-31 15:04:15,882 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-31 15:04:15,882 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-31 15:04:15,883 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2024-10-31 15:04:15,883 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-10-31 15:04:15,884 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-31 15:04:15,885 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-31 15:04:15,885 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-31 15:04:15,886 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-31 15:04:15,886 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2024-10-31 15:04:15,886 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Allow undefined functions -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol [2024-10-31 15:04:16,168 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-31 15:04:16,189 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-31 15:04:16,191 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-31 15:04:16,192 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-31 15:04:16,193 INFO L274 PluginConnector]: CDTParser initialized [2024-10-31 15:04:16,194 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/s3_srvr_2a_alt.BV.c.cil.c [2024-10-31 15:04:17,730 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-31 15:04:17,975 INFO L384 CDTParser]: Found 1 translation units. [2024-10-31 15:04:17,976 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/bitvector/s3_srvr_2a_alt.BV.c.cil.c [2024-10-31 15:04:17,991 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b2d673a70/bc7473d812d944b6b1206f5ce29769ca/FLAG7a49f58e3 [2024-10-31 15:04:18,008 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b2d673a70/bc7473d812d944b6b1206f5ce29769ca [2024-10-31 15:04:18,010 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-31 15:04:18,013 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-10-31 15:04:18,015 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-31 15:04:18,015 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-31 15:04:18,019 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-31 15:04:18,020 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 03:04:18" (1/1) ... [2024-10-31 15:04:18,021 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2aa09038 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 03:04:18, skipping insertion in model container [2024-10-31 15:04:18,021 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 03:04:18" (1/1) ... [2024-10-31 15:04:18,067 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-31 15:04:18,303 WARN L251 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/bitvector/s3_srvr_2a_alt.BV.c.cil.c[44811,44824] [2024-10-31 15:04:18,314 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 15:04:18,327 INFO L200 MainTranslator]: Completed pre-run [2024-10-31 15:04:18,388 WARN L251 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/bitvector/s3_srvr_2a_alt.BV.c.cil.c[44811,44824] [2024-10-31 15:04:18,391 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 15:04:18,408 INFO L204 MainTranslator]: Completed translation [2024-10-31 15:04:18,408 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 03:04:18 WrapperNode [2024-10-31 15:04:18,408 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-31 15:04:18,409 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-31 15:04:18,409 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-31 15:04:18,409 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-31 15:04:18,415 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 03:04:18" (1/1) ... [2024-10-31 15:04:18,424 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 03:04:18" (1/1) ... [2024-10-31 15:04:18,451 INFO L138 Inliner]: procedures = 15, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 526 [2024-10-31 15:04:18,455 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-31 15:04:18,455 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-31 15:04:18,456 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-31 15:04:18,456 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-31 15:04:18,467 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 03:04:18" (1/1) ... [2024-10-31 15:04:18,467 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 03:04:18" (1/1) ... [2024-10-31 15:04:18,471 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 03:04:18" (1/1) ... [2024-10-31 15:04:18,484 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]. [2024-10-31 15:04:18,484 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 03:04:18" (1/1) ... [2024-10-31 15:04:18,484 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 03:04:18" (1/1) ... [2024-10-31 15:04:18,495 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 03:04:18" (1/1) ... [2024-10-31 15:04:18,505 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 03:04:18" (1/1) ... [2024-10-31 15:04:18,508 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 03:04:18" (1/1) ... [2024-10-31 15:04:18,510 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 03:04:18" (1/1) ... [2024-10-31 15:04:18,516 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-31 15:04:18,517 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-31 15:04:18,517 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-31 15:04:18,517 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-31 15:04:18,518 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 03:04:18" (1/1) ... [2024-10-31 15:04:18,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 15:04:18,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-31 15:04:18,542 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) [2024-10-31 15:04:18,546 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 [2024-10-31 15:04:18,565 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-31 15:04:18,566 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-10-31 15:04:18,566 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-31 15:04:18,566 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-31 15:04:18,679 INFO L238 CfgBuilder]: Building ICFG [2024-10-31 15:04:18,681 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-31 15:04:18,703 WARN L781 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2024-10-31 15:04:19,226 INFO L735 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2024-10-31 15:04:19,226 INFO L735 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2024-10-31 15:04:19,280 INFO L? ?]: Removed 118 outVars from TransFormulas that were not future-live. [2024-10-31 15:04:19,280 INFO L287 CfgBuilder]: Performing block encoding [2024-10-31 15:04:19,298 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-31 15:04:19,299 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-10-31 15:04:19,300 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 03:04:19 BoogieIcfgContainer [2024-10-31 15:04:19,300 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-31 15:04:19,302 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-31 15:04:19,302 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-31 15:04:19,305 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-31 15:04:19,305 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.10 03:04:18" (1/3) ... [2024-10-31 15:04:19,306 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70cba3c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 03:04:19, skipping insertion in model container [2024-10-31 15:04:19,306 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 03:04:18" (2/3) ... [2024-10-31 15:04:19,306 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70cba3c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 03:04:19, skipping insertion in model container [2024-10-31 15:04:19,306 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 03:04:19" (3/3) ... [2024-10-31 15:04:19,307 INFO L112 eAbstractionObserver]: Analyzing ICFG s3_srvr_2a_alt.BV.c.cil.c [2024-10-31 15:04:19,323 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-31 15:04:19,323 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-31 15:04:19,386 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-31 15:04:19,392 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;@f89ce70, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-31 15:04:19,393 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-31 15:04:19,398 INFO L276 IsEmpty]: Start isEmpty. Operand has 138 states, 136 states have (on average 1.7426470588235294) internal successors, (237), 137 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 15:04:19,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-10-31 15:04:19,406 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:04:19,407 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 15:04:19,408 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:04:19,413 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:04:19,413 INFO L85 PathProgramCache]: Analyzing trace with hash 1632002022, now seen corresponding path program 1 times [2024-10-31 15:04:19,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:04:19,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1183420284] [2024-10-31 15:04:19,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:04:19,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:04:19,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:04:19,622 INFO L255 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-31 15:04:19,629 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:04:19,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 15:04:19,718 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:04:19,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 15:04:19,825 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:04:19,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1183420284] [2024-10-31 15:04:19,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1183420284] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 15:04:19,826 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 15:04:19,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2024-10-31 15:04:19,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681440866] [2024-10-31 15:04:19,828 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 15:04:19,833 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 15:04:19,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:04:19,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 15:04:19,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 15:04:19,860 INFO L87 Difference]: Start difference. First operand has 138 states, 136 states have (on average 1.7426470588235294) internal successors, (237), 137 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 15:04:20,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:04:20,067 INFO L93 Difference]: Finished difference Result 275 states and 473 transitions. [2024-10-31 15:04:20,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 15:04:20,070 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2024-10-31 15:04:20,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:04:20,079 INFO L225 Difference]: With dead ends: 275 [2024-10-31 15:04:20,079 INFO L226 Difference]: Without dead ends: 125 [2024-10-31 15:04:20,083 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 15:04:20,088 INFO L432 NwaCegarLoop]: 211 mSDtfsCounter, 8 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-31 15:04:20,090 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 325 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-31 15:04:20,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2024-10-31 15:04:20,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2024-10-31 15:04:20,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.4919354838709677) internal successors, (185), 124 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 15:04:20,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 185 transitions. [2024-10-31 15:04:20,137 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 185 transitions. Word has length 44 [2024-10-31 15:04:20,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:04:20,137 INFO L471 AbstractCegarLoop]: Abstraction has 125 states and 185 transitions. [2024-10-31 15:04:20,138 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 15:04:20,138 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 185 transitions. [2024-10-31 15:04:20,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-10-31 15:04:20,142 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:04:20,143 INFO L215 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2024-10-31 15:04:20,143 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-31 15:04:20,143 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:04:20,144 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:04:20,144 INFO L85 PathProgramCache]: Analyzing trace with hash 2033157093, now seen corresponding path program 1 times [2024-10-31 15:04:20,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:04:20,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2128818228] [2024-10-31 15:04:20,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:04:20,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:04:20,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:04:20,272 INFO L255 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-31 15:04:20,275 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:04:20,380 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 15:04:20,380 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:04:20,487 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 15:04:20,488 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:04:20,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2128818228] [2024-10-31 15:04:20,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [2128818228] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 15:04:20,488 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 15:04:20,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2024-10-31 15:04:20,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841350847] [2024-10-31 15:04:20,489 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 15:04:20,490 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 15:04:20,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:04:20,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 15:04:20,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-31 15:04:20,492 INFO L87 Difference]: Start difference. First operand 125 states and 185 transitions. Second operand has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 15:04:20,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:04:20,567 INFO L93 Difference]: Finished difference Result 432 states and 659 transitions. [2024-10-31 15:04:20,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 15:04:20,568 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2024-10-31 15:04:20,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:04:20,571 INFO L225 Difference]: With dead ends: 432 [2024-10-31 15:04:20,571 INFO L226 Difference]: Without dead ends: 326 [2024-10-31 15:04:20,571 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-31 15:04:20,573 INFO L432 NwaCegarLoop]: 177 mSDtfsCounter, 346 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 346 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 15:04:20,573 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [346 Valid, 487 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 15:04:20,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2024-10-31 15:04:20,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 326. [2024-10-31 15:04:20,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 1.5138461538461538) internal successors, (492), 325 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 15:04:20,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 492 transitions. [2024-10-31 15:04:20,595 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 492 transitions. Word has length 60 [2024-10-31 15:04:20,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:04:20,596 INFO L471 AbstractCegarLoop]: Abstraction has 326 states and 492 transitions. [2024-10-31 15:04:20,596 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 15:04:20,596 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 492 transitions. [2024-10-31 15:04:20,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2024-10-31 15:04:20,599 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:04:20,599 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 15:04:20,599 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-31 15:04:20,600 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:04:20,600 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:04:20,600 INFO L85 PathProgramCache]: Analyzing trace with hash -1976048908, now seen corresponding path program 1 times [2024-10-31 15:04:20,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:04:20,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1301323621] [2024-10-31 15:04:20,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:04:20,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:04:20,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:04:20,642 INFO L255 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-31 15:04:20,643 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:04:20,681 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-31 15:04:20,681 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:04:20,716 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-31 15:04:20,717 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:04:20,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1301323621] [2024-10-31 15:04:20,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1301323621] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 15:04:20,717 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 15:04:20,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2024-10-31 15:04:20,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051983314] [2024-10-31 15:04:20,718 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 15:04:20,718 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 15:04:20,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:04:20,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 15:04:20,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 15:04:20,720 INFO L87 Difference]: Start difference. First operand 326 states and 492 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 15:04:20,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:04:20,742 INFO L93 Difference]: Finished difference Result 635 states and 964 transitions. [2024-10-31 15:04:20,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 15:04:20,742 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2024-10-31 15:04:20,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:04:20,744 INFO L225 Difference]: With dead ends: 635 [2024-10-31 15:04:20,744 INFO L226 Difference]: Without dead ends: 328 [2024-10-31 15:04:20,745 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 15:04:20,746 INFO L432 NwaCegarLoop]: 173 mSDtfsCounter, 6 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 15:04:20,747 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 326 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 15:04:20,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2024-10-31 15:04:20,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 328. [2024-10-31 15:04:20,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 1.510703363914373) internal successors, (494), 327 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 15:04:20,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 494 transitions. [2024-10-31 15:04:20,761 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 494 transitions. Word has length 82 [2024-10-31 15:04:20,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:04:20,762 INFO L471 AbstractCegarLoop]: Abstraction has 328 states and 494 transitions. [2024-10-31 15:04:20,762 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 15:04:20,762 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 494 transitions. [2024-10-31 15:04:20,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2024-10-31 15:04:20,765 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:04:20,766 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 15:04:20,766 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-31 15:04:20,766 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:04:20,766 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:04:20,766 INFO L85 PathProgramCache]: Analyzing trace with hash -1614320406, now seen corresponding path program 1 times [2024-10-31 15:04:20,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:04:20,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [992545503] [2024-10-31 15:04:20,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:04:20,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:04:20,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:04:20,862 INFO L255 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-31 15:04:20,867 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:04:20,906 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-10-31 15:04:20,906 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:04:20,984 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 58 proven. 17 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-10-31 15:04:20,984 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:04:20,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [992545503] [2024-10-31 15:04:20,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [992545503] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-31 15:04:20,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-31 15:04:20,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2024-10-31 15:04:20,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765422056] [2024-10-31 15:04:20,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 15:04:20,986 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 15:04:20,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:04:20,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 15:04:20,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-31 15:04:20,987 INFO L87 Difference]: Start difference. First operand 328 states and 494 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 15:04:21,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:04:21,165 INFO L93 Difference]: Finished difference Result 760 states and 1181 transitions. [2024-10-31 15:04:21,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 15:04:21,166 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2024-10-31 15:04:21,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:04:21,168 INFO L225 Difference]: With dead ends: 760 [2024-10-31 15:04:21,168 INFO L226 Difference]: Without dead ends: 453 [2024-10-31 15:04:21,169 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-31 15:04:21,170 INFO L432 NwaCegarLoop]: 185 mSDtfsCounter, 29 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-31 15:04:21,170 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 272 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-31 15:04:21,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2024-10-31 15:04:21,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 453. [2024-10-31 15:04:21,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 452 states have (on average 1.4026548672566372) internal successors, (634), 452 states have internal predecessors, (634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 15:04:21,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 634 transitions. [2024-10-31 15:04:21,190 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 634 transitions. Word has length 103 [2024-10-31 15:04:21,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:04:21,191 INFO L471 AbstractCegarLoop]: Abstraction has 453 states and 634 transitions. [2024-10-31 15:04:21,191 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 15:04:21,191 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 634 transitions. [2024-10-31 15:04:21,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2024-10-31 15:04:21,197 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:04:21,198 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 15:04:21,199 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-31 15:04:21,199 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:04:21,199 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:04:21,200 INFO L85 PathProgramCache]: Analyzing trace with hash -1420566810, now seen corresponding path program 1 times [2024-10-31 15:04:21,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:04:21,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1819413007] [2024-10-31 15:04:21,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:04:21,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:04:21,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:04:21,250 INFO L255 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-31 15:04:21,269 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:04:21,300 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-10-31 15:04:21,301 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:04:21,362 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 58 proven. 17 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-10-31 15:04:21,362 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:04:21,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1819413007] [2024-10-31 15:04:21,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1819413007] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-31 15:04:21,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-31 15:04:21,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2024-10-31 15:04:21,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299561933] [2024-10-31 15:04:21,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 15:04:21,364 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 15:04:21,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:04:21,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 15:04:21,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-31 15:04:21,365 INFO L87 Difference]: Start difference. First operand 453 states and 634 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 15:04:21,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:04:21,488 INFO L93 Difference]: Finished difference Result 931 states and 1317 transitions. [2024-10-31 15:04:21,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 15:04:21,492 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2024-10-31 15:04:21,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:04:21,494 INFO L225 Difference]: With dead ends: 931 [2024-10-31 15:04:21,494 INFO L226 Difference]: Without dead ends: 499 [2024-10-31 15:04:21,495 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-31 15:04:21,498 INFO L432 NwaCegarLoop]: 186 mSDtfsCounter, 11 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 15:04:21,499 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 273 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 15:04:21,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2024-10-31 15:04:21,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 499. [2024-10-31 15:04:21,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 498 states have (on average 1.3855421686746987) internal successors, (690), 498 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 15:04:21,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 690 transitions. [2024-10-31 15:04:21,521 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 690 transitions. Word has length 103 [2024-10-31 15:04:21,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:04:21,523 INFO L471 AbstractCegarLoop]: Abstraction has 499 states and 690 transitions. [2024-10-31 15:04:21,524 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 15:04:21,524 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 690 transitions. [2024-10-31 15:04:21,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2024-10-31 15:04:21,525 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:04:21,526 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 3, 3, 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] [2024-10-31 15:04:21,526 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-31 15:04:21,526 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:04:21,526 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:04:21,526 INFO L85 PathProgramCache]: Analyzing trace with hash 1506722242, now seen corresponding path program 1 times [2024-10-31 15:04:21,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:04:21,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [833080167] [2024-10-31 15:04:21,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:04:21,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:04:21,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:04:21,590 INFO L255 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-31 15:04:21,592 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:04:21,663 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 183 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-10-31 15:04:21,664 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:04:21,736 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 183 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-10-31 15:04:21,736 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:04:21,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [833080167] [2024-10-31 15:04:21,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [833080167] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 15:04:21,737 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 15:04:21,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2024-10-31 15:04:21,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074650401] [2024-10-31 15:04:21,737 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 15:04:21,738 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 15:04:21,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:04:21,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 15:04:21,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-31 15:04:21,743 INFO L87 Difference]: Start difference. First operand 499 states and 690 transitions. Second operand has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 15:04:21,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:04:21,792 INFO L93 Difference]: Finished difference Result 1286 states and 1790 transitions. [2024-10-31 15:04:21,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 15:04:21,792 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 143 [2024-10-31 15:04:21,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:04:21,796 INFO L225 Difference]: With dead ends: 1286 [2024-10-31 15:04:21,796 INFO L226 Difference]: Without dead ends: 808 [2024-10-31 15:04:21,797 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 282 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-31 15:04:21,799 INFO L432 NwaCegarLoop]: 310 mSDtfsCounter, 268 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 620 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 15:04:21,799 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [268 Valid, 620 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 15:04:21,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 808 states. [2024-10-31 15:04:21,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 808 to 808. [2024-10-31 15:04:21,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 808 states, 807 states have (on average 1.3866171003717471) internal successors, (1119), 807 states have internal predecessors, (1119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 15:04:21,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 808 states to 808 states and 1119 transitions. [2024-10-31 15:04:21,819 INFO L78 Accepts]: Start accepts. Automaton has 808 states and 1119 transitions. Word has length 143 [2024-10-31 15:04:21,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:04:21,820 INFO L471 AbstractCegarLoop]: Abstraction has 808 states and 1119 transitions. [2024-10-31 15:04:21,820 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 15:04:21,820 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states and 1119 transitions. [2024-10-31 15:04:21,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2024-10-31 15:04:21,822 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:04:21,823 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2024-10-31 15:04:21,823 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-31 15:04:21,823 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:04:21,823 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:04:21,823 INFO L85 PathProgramCache]: Analyzing trace with hash 778746127, now seen corresponding path program 1 times [2024-10-31 15:04:21,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:04:21,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1564878102] [2024-10-31 15:04:21,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:04:21,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:04:21,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:04:21,900 INFO L255 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-31 15:04:21,903 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:04:22,000 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 198 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-10-31 15:04:22,001 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:04:22,089 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 198 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-10-31 15:04:22,089 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:04:22,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1564878102] [2024-10-31 15:04:22,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1564878102] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 15:04:22,090 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 15:04:22,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2024-10-31 15:04:22,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441587433] [2024-10-31 15:04:22,090 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 15:04:22,090 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 15:04:22,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:04:22,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 15:04:22,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 15:04:22,091 INFO L87 Difference]: Start difference. First operand 808 states and 1119 transitions. Second operand has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 15:04:22,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:04:22,121 INFO L93 Difference]: Finished difference Result 2217 states and 3117 transitions. [2024-10-31 15:04:22,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 15:04:22,122 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 163 [2024-10-31 15:04:22,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:04:22,128 INFO L225 Difference]: With dead ends: 2217 [2024-10-31 15:04:22,128 INFO L226 Difference]: Without dead ends: 1430 [2024-10-31 15:04:22,129 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 323 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 15:04:22,130 INFO L432 NwaCegarLoop]: 324 mSDtfsCounter, 110 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 491 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 15:04:22,130 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 491 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 15:04:22,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1430 states. [2024-10-31 15:04:22,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1430 to 1428. [2024-10-31 15:04:22,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1428 states, 1427 states have (on average 1.4085494043447793) internal successors, (2010), 1427 states have internal predecessors, (2010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 15:04:22,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1428 states to 1428 states and 2010 transitions. [2024-10-31 15:04:22,172 INFO L78 Accepts]: Start accepts. Automaton has 1428 states and 2010 transitions. Word has length 163 [2024-10-31 15:04:22,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:04:22,172 INFO L471 AbstractCegarLoop]: Abstraction has 1428 states and 2010 transitions. [2024-10-31 15:04:22,173 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 15:04:22,173 INFO L276 IsEmpty]: Start isEmpty. Operand 1428 states and 2010 transitions. [2024-10-31 15:04:22,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2024-10-31 15:04:22,176 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:04:22,176 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2024-10-31 15:04:22,176 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-10-31 15:04:22,177 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:04:22,177 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:04:22,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1067369758, now seen corresponding path program 1 times [2024-10-31 15:04:22,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:04:22,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [851164335] [2024-10-31 15:04:22,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:04:22,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:04:22,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:04:22,214 INFO L255 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-31 15:04:22,216 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:04:22,248 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 209 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2024-10-31 15:04:22,248 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:04:22,309 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 192 proven. 33 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2024-10-31 15:04:22,309 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:04:22,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [851164335] [2024-10-31 15:04:22,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [851164335] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-31 15:04:22,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-31 15:04:22,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2024-10-31 15:04:22,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080591093] [2024-10-31 15:04:22,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 15:04:22,310 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 15:04:22,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:04:22,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 15:04:22,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-31 15:04:22,311 INFO L87 Difference]: Start difference. First operand 1428 states and 2010 transitions. Second operand has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 15:04:22,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:04:22,482 INFO L93 Difference]: Finished difference Result 3171 states and 4595 transitions. [2024-10-31 15:04:22,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 15:04:22,483 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 183 [2024-10-31 15:04:22,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:04:22,489 INFO L225 Difference]: With dead ends: 3171 [2024-10-31 15:04:22,489 INFO L226 Difference]: Without dead ends: 1764 [2024-10-31 15:04:22,491 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 361 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-31 15:04:22,492 INFO L432 NwaCegarLoop]: 185 mSDtfsCounter, 30 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 15:04:22,492 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 271 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 15:04:22,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1764 states. [2024-10-31 15:04:22,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1764 to 1764. [2024-10-31 15:04:22,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1764 states, 1763 states have (on average 1.3533749290981283) internal successors, (2386), 1763 states have internal predecessors, (2386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 15:04:22,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1764 states to 1764 states and 2386 transitions. [2024-10-31 15:04:22,525 INFO L78 Accepts]: Start accepts. Automaton has 1764 states and 2386 transitions. Word has length 183 [2024-10-31 15:04:22,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:04:22,525 INFO L471 AbstractCegarLoop]: Abstraction has 1764 states and 2386 transitions. [2024-10-31 15:04:22,525 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 15:04:22,526 INFO L276 IsEmpty]: Start isEmpty. Operand 1764 states and 2386 transitions. [2024-10-31 15:04:22,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2024-10-31 15:04:22,529 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:04:22,529 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 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] [2024-10-31 15:04:22,530 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-10-31 15:04:22,530 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:04:22,530 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:04:22,530 INFO L85 PathProgramCache]: Analyzing trace with hash -860101462, now seen corresponding path program 1 times [2024-10-31 15:04:22,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:04:22,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [22474573] [2024-10-31 15:04:22,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:04:22,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:04:22,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:04:22,591 INFO L255 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-31 15:04:22,594 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:04:25,020 WARN L873 $PredicateComparison]: unable to prove that (exists ((|ULTIMATE.start_ssl3_accept_~ag_X~0#1| (_ BitVec 32)) (|ULTIMATE.start_ssl3_accept_~ag_Y~0#1| (_ BitVec 32))) (= |c_ULTIMATE.start_ssl3_accept_~s__state~0#1| (bvadd (bvmul (_ bv2 32) |ULTIMATE.start_ssl3_accept_~ag_X~0#1|) (bvmul (_ bv2 32) |ULTIMATE.start_ssl3_accept_~ag_Y~0#1|)))) is different from true [2024-10-31 15:04:25,162 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 294 proven. 0 refuted. 32 times theorem prover too weak. 92 trivial. 16 not checked. [2024-10-31 15:04:25,162 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:04:25,213 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 299 proven. 0 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2024-10-31 15:04:25,213 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:04:25,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [22474573] [2024-10-31 15:04:25,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [22474573] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-31 15:04:25,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-31 15:04:25,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2024-10-31 15:04:25,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560177334] [2024-10-31 15:04:25,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 15:04:25,214 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 15:04:25,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:04:25,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 15:04:25,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=7, Unknown=1, NotChecked=4, Total=20 [2024-10-31 15:04:25,215 INFO L87 Difference]: Start difference. First operand 1764 states and 2386 transitions. Second operand has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 15:04:25,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:04:25,362 INFO L93 Difference]: Finished difference Result 3717 states and 5077 transitions. [2024-10-31 15:04:25,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 15:04:25,363 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 225 [2024-10-31 15:04:25,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:04:25,369 INFO L225 Difference]: With dead ends: 3717 [2024-10-31 15:04:25,370 INFO L226 Difference]: Without dead ends: 1974 [2024-10-31 15:04:25,372 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 448 GetRequests, 445 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=8, Invalid=7, Unknown=1, NotChecked=4, Total=20 [2024-10-31 15:04:25,372 INFO L432 NwaCegarLoop]: 131 mSDtfsCounter, 44 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 15:04:25,372 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 202 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 15:04:25,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1974 states. [2024-10-31 15:04:25,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1974 to 1974. [2024-10-31 15:04:25,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1974 states, 1973 states have (on average 1.3715154586923466) internal successors, (2706), 1973 states have internal predecessors, (2706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 15:04:25,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1974 states to 1974 states and 2706 transitions. [2024-10-31 15:04:25,415 INFO L78 Accepts]: Start accepts. Automaton has 1974 states and 2706 transitions. Word has length 225 [2024-10-31 15:04:25,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:04:25,415 INFO L471 AbstractCegarLoop]: Abstraction has 1974 states and 2706 transitions. [2024-10-31 15:04:25,415 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 15:04:25,415 INFO L276 IsEmpty]: Start isEmpty. Operand 1974 states and 2706 transitions. [2024-10-31 15:04:25,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2024-10-31 15:04:25,419 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:04:25,419 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 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] [2024-10-31 15:04:25,419 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-10-31 15:04:25,420 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:04:25,420 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:04:25,420 INFO L85 PathProgramCache]: Analyzing trace with hash -222886975, now seen corresponding path program 1 times [2024-10-31 15:04:25,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:04:25,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [114567629] [2024-10-31 15:04:25,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:04:25,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:04:25,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:04:25,462 INFO L255 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-31 15:04:25,464 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:04:25,523 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 303 proven. 9 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2024-10-31 15:04:25,523 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:04:25,558 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 303 proven. 0 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2024-10-31 15:04:25,558 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:04:25,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [114567629] [2024-10-31 15:04:25,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [114567629] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-31 15:04:25,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-31 15:04:25,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2024-10-31 15:04:25,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102235776] [2024-10-31 15:04:25,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 15:04:25,559 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 15:04:25,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:04:25,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 15:04:25,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-31 15:04:25,560 INFO L87 Difference]: Start difference. First operand 1974 states and 2706 transitions. Second operand has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 15:04:25,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:04:25,702 INFO L93 Difference]: Finished difference Result 4147 states and 5737 transitions. [2024-10-31 15:04:25,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 15:04:25,702 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 226 [2024-10-31 15:04:25,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:04:25,710 INFO L225 Difference]: With dead ends: 4147 [2024-10-31 15:04:25,710 INFO L226 Difference]: Without dead ends: 2194 [2024-10-31 15:04:25,713 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 450 GetRequests, 448 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-31 15:04:25,713 INFO L432 NwaCegarLoop]: 110 mSDtfsCounter, 44 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 15:04:25,714 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 181 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 15:04:25,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2194 states. [2024-10-31 15:04:25,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2194 to 2194. [2024-10-31 15:04:25,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2194 states, 2193 states have (on average 1.3889648882808938) internal successors, (3046), 2193 states have internal predecessors, (3046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 15:04:25,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2194 states to 2194 states and 3046 transitions. [2024-10-31 15:04:25,763 INFO L78 Accepts]: Start accepts. Automaton has 2194 states and 3046 transitions. Word has length 226 [2024-10-31 15:04:25,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:04:25,763 INFO L471 AbstractCegarLoop]: Abstraction has 2194 states and 3046 transitions. [2024-10-31 15:04:25,763 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 15:04:25,763 INFO L276 IsEmpty]: Start isEmpty. Operand 2194 states and 3046 transitions. [2024-10-31 15:04:25,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2024-10-31 15:04:25,768 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:04:25,768 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 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] [2024-10-31 15:04:25,768 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-10-31 15:04:25,768 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:04:25,769 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:04:25,769 INFO L85 PathProgramCache]: Analyzing trace with hash 1252165159, now seen corresponding path program 1 times [2024-10-31 15:04:25,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:04:25,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [870444852] [2024-10-31 15:04:25,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:04:25,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:04:25,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:04:25,871 INFO L255 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-31 15:04:25,875 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:04:25,910 INFO L134 CoverageAnalysis]: Checked inductivity of 526 backedges. 359 proven. 0 refuted. 0 times theorem prover too weak. 167 trivial. 0 not checked. [2024-10-31 15:04:25,911 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:04:25,947 INFO L134 CoverageAnalysis]: Checked inductivity of 526 backedges. 359 proven. 0 refuted. 0 times theorem prover too weak. 167 trivial. 0 not checked. [2024-10-31 15:04:25,947 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:04:25,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [870444852] [2024-10-31 15:04:25,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [870444852] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 15:04:25,948 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 15:04:25,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2024-10-31 15:04:25,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516209799] [2024-10-31 15:04:25,948 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 15:04:25,949 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 15:04:25,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:04:25,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 15:04:25,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-31 15:04:25,950 INFO L87 Difference]: Start difference. First operand 2194 states and 3046 transitions. Second operand has 4 states, 4 states have (on average 37.25) internal successors, (149), 4 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 15:04:26,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:04:26,178 INFO L93 Difference]: Finished difference Result 4677 states and 6577 transitions. [2024-10-31 15:04:26,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 15:04:26,179 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.25) internal successors, (149), 4 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 241 [2024-10-31 15:04:26,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:04:26,188 INFO L225 Difference]: With dead ends: 4677 [2024-10-31 15:04:26,188 INFO L226 Difference]: Without dead ends: 2504 [2024-10-31 15:04:26,191 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 480 GetRequests, 478 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-31 15:04:26,192 INFO L432 NwaCegarLoop]: 136 mSDtfsCounter, 69 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-31 15:04:26,192 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 231 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-31 15:04:26,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2504 states. [2024-10-31 15:04:26,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2504 to 2504. [2024-10-31 15:04:26,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2504 states, 2503 states have (on average 1.3567718737514982) internal successors, (3396), 2503 states have internal predecessors, (3396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 15:04:26,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2504 states to 2504 states and 3396 transitions. [2024-10-31 15:04:26,254 INFO L78 Accepts]: Start accepts. Automaton has 2504 states and 3396 transitions. Word has length 241 [2024-10-31 15:04:26,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:04:26,254 INFO L471 AbstractCegarLoop]: Abstraction has 2504 states and 3396 transitions. [2024-10-31 15:04:26,255 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.25) internal successors, (149), 4 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 15:04:26,255 INFO L276 IsEmpty]: Start isEmpty. Operand 2504 states and 3396 transitions. [2024-10-31 15:04:26,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2024-10-31 15:04:26,260 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:04:26,261 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 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] [2024-10-31 15:04:26,261 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-10-31 15:04:26,261 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:04:26,261 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:04:26,261 INFO L85 PathProgramCache]: Analyzing trace with hash -482554043, now seen corresponding path program 1 times [2024-10-31 15:04:26,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:04:26,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1588870120] [2024-10-31 15:04:26,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:04:26,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:04:26,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:04:26,322 INFO L255 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-31 15:04:26,325 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:04:26,734 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 425 proven. 64 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2024-10-31 15:04:26,734 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:04:28,377 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 430 proven. 16 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2024-10-31 15:04:28,377 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:04:28,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1588870120] [2024-10-31 15:04:28,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1588870120] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 15:04:28,377 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 15:04:28,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2024-10-31 15:04:28,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308876058] [2024-10-31 15:04:28,378 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 15:04:28,378 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-31 15:04:28,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:04:28,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-31 15:04:28,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-10-31 15:04:28,379 INFO L87 Difference]: Start difference. First operand 2504 states and 3396 transitions. Second operand has 7 states, 7 states have (on average 31.857142857142858) internal successors, (223), 7 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 15:04:31,014 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.57s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-10-31 15:04:33,819 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.72s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-10-31 15:04:36,921 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.91s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-10-31 15:04:40,790 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.65s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-10-31 15:04:43,784 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.83s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-10-31 15:04:46,832 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.84s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-10-31 15:04:50,005 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.05s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-10-31 15:04:54,126 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.92s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-10-31 15:04:56,782 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.66s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-10-31 15:04:58,221 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-10-31 15:05:00,991 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.61s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-10-31 15:05:03,713 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.54s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-10-31 15:05:07,401 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.63s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-10-31 15:05:10,327 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.64s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-10-31 15:05:12,956 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.46s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-10-31 15:05:15,349 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.39s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-10-31 15:05:18,125 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.65s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-10-31 15:05:20,627 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.45s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-10-31 15:05:23,607 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.54s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-10-31 15:05:27,834 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.82s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-10-31 15:05:32,320 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.92s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-10-31 15:05:37,274 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.10s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-10-31 15:05:42,359 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.88s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-10-31 15:05:45,555 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.95s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-10-31 15:05:48,033 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.39s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-10-31 15:05:52,467 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.80s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-10-31 15:05:55,223 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.74s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-10-31 15:05:56,559 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-10-31 15:05:56,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:05:56,602 INFO L93 Difference]: Finished difference Result 8339 states and 11804 transitions. [2024-10-31 15:05:56,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-31 15:05:56,603 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 31.857142857142858) internal successors, (223), 7 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 253 [2024-10-31 15:05:56,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:05:56,623 INFO L225 Difference]: With dead ends: 8339 [2024-10-31 15:05:56,623 INFO L226 Difference]: Without dead ends: 5838 [2024-10-31 15:05:56,627 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 522 GetRequests, 508 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2024-10-31 15:05:56,628 INFO L432 NwaCegarLoop]: 315 mSDtfsCounter, 464 mSDsluCounter, 697 mSDsCounter, 0 mSdLazyCounter, 1105 mSolverCounterSat, 75 mSolverCounterUnsat, 25 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 87.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 464 SdHoareTripleChecker+Valid, 1012 SdHoareTripleChecker+Invalid, 1205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1105 IncrementalHoareTripleChecker+Invalid, 25 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 87.9s IncrementalHoareTripleChecker+Time [2024-10-31 15:05:56,628 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [464 Valid, 1012 Invalid, 1205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1105 Invalid, 25 Unknown, 0 Unchecked, 87.9s Time] [2024-10-31 15:05:56,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5838 states. [2024-10-31 15:05:56,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5838 to 4929. [2024-10-31 15:05:56,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4929 states, 4928 states have (on average 1.3601866883116882) internal successors, (6703), 4928 states have internal predecessors, (6703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 15:05:56,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4929 states to 4929 states and 6703 transitions. [2024-10-31 15:05:56,781 INFO L78 Accepts]: Start accepts. Automaton has 4929 states and 6703 transitions. Word has length 253 [2024-10-31 15:05:56,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:05:56,782 INFO L471 AbstractCegarLoop]: Abstraction has 4929 states and 6703 transitions. [2024-10-31 15:05:56,782 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 31.857142857142858) internal successors, (223), 7 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 15:05:56,782 INFO L276 IsEmpty]: Start isEmpty. Operand 4929 states and 6703 transitions. [2024-10-31 15:05:56,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2024-10-31 15:05:56,791 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:05:56,791 INFO L215 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 7, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 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] [2024-10-31 15:05:56,791 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-10-31 15:05:56,792 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:05:56,792 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:05:56,792 INFO L85 PathProgramCache]: Analyzing trace with hash -726629683, now seen corresponding path program 1 times [2024-10-31 15:05:56,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:05:56,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1495515153] [2024-10-31 15:05:56,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:05:56,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:05:56,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:05:56,826 INFO L255 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-31 15:05:56,828 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:05:56,862 INFO L134 CoverageAnalysis]: Checked inductivity of 658 backedges. 371 proven. 0 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2024-10-31 15:05:56,862 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:05:56,895 INFO L134 CoverageAnalysis]: Checked inductivity of 658 backedges. 371 proven. 0 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2024-10-31 15:05:56,896 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:05:56,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1495515153] [2024-10-31 15:05:56,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1495515153] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 15:05:56,896 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 15:05:56,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2024-10-31 15:05:56,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89399461] [2024-10-31 15:05:56,896 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 15:05:56,897 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 15:05:56,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:05:56,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 15:05:56,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 15:05:56,897 INFO L87 Difference]: Start difference. First operand 4929 states and 6703 transitions. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 15:05:57,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:05:57,084 INFO L93 Difference]: Finished difference Result 10287 states and 14011 transitions. [2024-10-31 15:05:57,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 15:05:57,085 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 254 [2024-10-31 15:05:57,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:05:57,101 INFO L225 Difference]: With dead ends: 10287 [2024-10-31 15:05:57,102 INFO L226 Difference]: Without dead ends: 5379 [2024-10-31 15:05:57,108 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 506 GetRequests, 505 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 15:05:57,109 INFO L432 NwaCegarLoop]: 185 mSDtfsCounter, 9 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 15:05:57,109 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 272 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 15:05:57,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5379 states. [2024-10-31 15:05:57,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5379 to 5379. [2024-10-31 15:05:57,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5379 states, 5378 states have (on average 1.3467831907772405) internal successors, (7243), 5378 states have internal predecessors, (7243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 15:05:57,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5379 states to 5379 states and 7243 transitions. [2024-10-31 15:05:57,259 INFO L78 Accepts]: Start accepts. Automaton has 5379 states and 7243 transitions. Word has length 254 [2024-10-31 15:05:57,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:05:57,260 INFO L471 AbstractCegarLoop]: Abstraction has 5379 states and 7243 transitions. [2024-10-31 15:05:57,260 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 15:05:57,260 INFO L276 IsEmpty]: Start isEmpty. Operand 5379 states and 7243 transitions. [2024-10-31 15:05:57,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2024-10-31 15:05:57,270 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:05:57,271 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 8, 7, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 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, 1, 1, 1, 1] [2024-10-31 15:05:57,271 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-10-31 15:05:57,271 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:05:57,272 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:05:57,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1268706312, now seen corresponding path program 1 times [2024-10-31 15:05:57,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:05:57,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [713758119] [2024-10-31 15:05:57,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:05:57,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:05:57,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:05:57,314 INFO L255 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-31 15:05:57,317 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:05:57,357 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 496 proven. 0 refuted. 0 times theorem prover too weak. 386 trivial. 0 not checked. [2024-10-31 15:05:57,357 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:05:57,393 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 496 proven. 0 refuted. 0 times theorem prover too weak. 386 trivial. 0 not checked. [2024-10-31 15:05:57,393 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:05:57,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [713758119] [2024-10-31 15:05:57,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [713758119] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 15:05:57,394 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 15:05:57,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2024-10-31 15:05:57,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898045728] [2024-10-31 15:05:57,394 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 15:05:57,394 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 15:05:57,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:05:57,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 15:05:57,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 15:05:57,395 INFO L87 Difference]: Start difference. First operand 5379 states and 7243 transitions. Second operand has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 15:05:57,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:05:57,561 INFO L93 Difference]: Finished difference Result 11223 states and 15145 transitions. [2024-10-31 15:05:57,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 15:05:57,562 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 300 [2024-10-31 15:05:57,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:05:57,579 INFO L225 Difference]: With dead ends: 11223 [2024-10-31 15:05:57,579 INFO L226 Difference]: Without dead ends: 5865 [2024-10-31 15:05:57,586 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 598 GetRequests, 597 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 15:05:57,587 INFO L432 NwaCegarLoop]: 185 mSDtfsCounter, 9 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 15:05:57,587 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 272 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 15:05:57,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5865 states. [2024-10-31 15:05:57,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5865 to 5865. [2024-10-31 15:05:57,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5865 states, 5864 states have (on average 1.3333901773533425) internal successors, (7819), 5864 states have internal predecessors, (7819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 15:05:57,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5865 states to 5865 states and 7819 transitions. [2024-10-31 15:05:57,742 INFO L78 Accepts]: Start accepts. Automaton has 5865 states and 7819 transitions. Word has length 300 [2024-10-31 15:05:57,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:05:57,742 INFO L471 AbstractCegarLoop]: Abstraction has 5865 states and 7819 transitions. [2024-10-31 15:05:57,742 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 15:05:57,742 INFO L276 IsEmpty]: Start isEmpty. Operand 5865 states and 7819 transitions. [2024-10-31 15:05:57,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2024-10-31 15:05:57,752 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:05:57,753 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 8, 8, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 2, 2, 2, 2, 2, 2, 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] [2024-10-31 15:05:57,753 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-10-31 15:05:57,753 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:05:57,754 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:05:57,754 INFO L85 PathProgramCache]: Analyzing trace with hash 1812513324, now seen corresponding path program 1 times [2024-10-31 15:05:57,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:05:57,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [160394345] [2024-10-31 15:05:57,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:05:57,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:05:57,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:05:57,792 INFO L255 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-31 15:05:57,795 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:05:57,829 INFO L134 CoverageAnalysis]: Checked inductivity of 908 backedges. 543 proven. 0 refuted. 0 times theorem prover too weak. 365 trivial. 0 not checked. [2024-10-31 15:05:57,830 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:05:57,863 INFO L134 CoverageAnalysis]: Checked inductivity of 908 backedges. 543 proven. 0 refuted. 0 times theorem prover too weak. 365 trivial. 0 not checked. [2024-10-31 15:05:57,863 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:05:57,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [160394345] [2024-10-31 15:05:57,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [160394345] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 15:05:57,863 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 15:05:57,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2024-10-31 15:05:57,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412195923] [2024-10-31 15:05:57,864 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 15:05:57,864 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 15:05:57,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:05:57,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 15:05:57,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-31 15:05:57,865 INFO L87 Difference]: Start difference. First operand 5865 states and 7819 transitions. Second operand has 4 states, 4 states have (on average 39.5) internal successors, (158), 4 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 15:05:58,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:05:58,110 INFO L93 Difference]: Finished difference Result 9538 states and 12831 transitions. [2024-10-31 15:05:58,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 15:05:58,111 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 39.5) internal successors, (158), 4 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 307 [2024-10-31 15:05:58,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:05:58,116 INFO L225 Difference]: With dead ends: 9538 [2024-10-31 15:05:58,116 INFO L226 Difference]: Without dead ends: 2446 [2024-10-31 15:05:58,120 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 612 GetRequests, 610 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-31 15:05:58,121 INFO L432 NwaCegarLoop]: 123 mSDtfsCounter, 81 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-31 15:05:58,121 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 281 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-31 15:05:58,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2446 states. [2024-10-31 15:05:58,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2446 to 2344. [2024-10-31 15:05:58,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2344 states, 2343 states have (on average 1.300469483568075) internal successors, (3047), 2343 states have internal predecessors, (3047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 15:05:58,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2344 states to 2344 states and 3047 transitions. [2024-10-31 15:05:58,164 INFO L78 Accepts]: Start accepts. Automaton has 2344 states and 3047 transitions. Word has length 307 [2024-10-31 15:05:58,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:05:58,164 INFO L471 AbstractCegarLoop]: Abstraction has 2344 states and 3047 transitions. [2024-10-31 15:05:58,164 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.5) internal successors, (158), 4 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 15:05:58,164 INFO L276 IsEmpty]: Start isEmpty. Operand 2344 states and 3047 transitions. [2024-10-31 15:05:58,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2024-10-31 15:05:58,170 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:05:58,170 INFO L215 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 9, 8, 7, 7, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 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, 1, 1, 1, 1, 1, 1] [2024-10-31 15:05:58,170 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-10-31 15:05:58,170 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:05:58,171 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:05:58,171 INFO L85 PathProgramCache]: Analyzing trace with hash -1338393859, now seen corresponding path program 1 times [2024-10-31 15:05:58,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:05:58,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1396648756] [2024-10-31 15:05:58,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:05:58,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:05:58,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:05:58,218 INFO L255 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-31 15:05:58,220 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:05:58,266 INFO L134 CoverageAnalysis]: Checked inductivity of 1074 backedges. 631 proven. 0 refuted. 0 times theorem prover too weak. 443 trivial. 0 not checked. [2024-10-31 15:05:58,266 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:05:58,304 INFO L134 CoverageAnalysis]: Checked inductivity of 1074 backedges. 631 proven. 0 refuted. 0 times theorem prover too weak. 443 trivial. 0 not checked. [2024-10-31 15:05:58,304 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:05:58,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1396648756] [2024-10-31 15:05:58,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1396648756] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 15:05:58,305 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 15:05:58,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2024-10-31 15:05:58,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572262734] [2024-10-31 15:05:58,305 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 15:05:58,306 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 15:05:58,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:05:58,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 15:05:58,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 15:05:58,307 INFO L87 Difference]: Start difference. First operand 2344 states and 3047 transitions. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 15:05:58,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:05:58,436 INFO L93 Difference]: Finished difference Result 4765 states and 6194 transitions. [2024-10-31 15:05:58,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 15:05:58,437 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 323 [2024-10-31 15:05:58,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:05:58,441 INFO L225 Difference]: With dead ends: 4765 [2024-10-31 15:05:58,441 INFO L226 Difference]: Without dead ends: 2442 [2024-10-31 15:05:58,443 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 644 GetRequests, 643 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 15:05:58,444 INFO L432 NwaCegarLoop]: 181 mSDtfsCounter, 9 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 15:05:58,444 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 267 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 15:05:58,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2442 states. [2024-10-31 15:05:58,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2442 to 2212. [2024-10-31 15:05:58,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2212 states, 2211 states have (on average 1.2831298055178653) internal successors, (2837), 2211 states have internal predecessors, (2837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 15:05:58,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2212 states to 2212 states and 2837 transitions. [2024-10-31 15:05:58,486 INFO L78 Accepts]: Start accepts. Automaton has 2212 states and 2837 transitions. Word has length 323 [2024-10-31 15:05:58,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:05:58,487 INFO L471 AbstractCegarLoop]: Abstraction has 2212 states and 2837 transitions. [2024-10-31 15:05:58,487 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 15:05:58,487 INFO L276 IsEmpty]: Start isEmpty. Operand 2212 states and 2837 transitions. [2024-10-31 15:05:58,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 356 [2024-10-31 15:05:58,490 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:05:58,490 INFO L215 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 10, 9, 8, 8, 7, 7, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 15:05:58,491 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-10-31 15:05:58,491 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:05:58,491 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:05:58,491 INFO L85 PathProgramCache]: Analyzing trace with hash 1263289202, now seen corresponding path program 1 times [2024-10-31 15:05:58,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:05:58,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1710622463] [2024-10-31 15:05:58,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:05:58,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:05:58,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:05:58,541 INFO L255 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-31 15:05:58,544 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:05:58,620 INFO L134 CoverageAnalysis]: Checked inductivity of 1310 backedges. 695 proven. 0 refuted. 0 times theorem prover too weak. 615 trivial. 0 not checked. [2024-10-31 15:05:58,621 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:05:58,705 INFO L134 CoverageAnalysis]: Checked inductivity of 1310 backedges. 695 proven. 0 refuted. 0 times theorem prover too weak. 615 trivial. 0 not checked. [2024-10-31 15:05:58,706 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:05:58,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1710622463] [2024-10-31 15:05:58,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1710622463] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 15:05:58,706 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 15:05:58,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2024-10-31 15:05:58,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696728771] [2024-10-31 15:05:58,707 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 15:05:58,707 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 15:05:58,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:05:58,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 15:05:58,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 15:05:58,708 INFO L87 Difference]: Start difference. First operand 2212 states and 2837 transitions. Second operand has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 15:05:58,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:05:58,766 INFO L93 Difference]: Finished difference Result 6380 states and 8142 transitions. [2024-10-31 15:05:58,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 15:05:58,767 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 355 [2024-10-31 15:05:58,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:05:58,773 INFO L225 Difference]: With dead ends: 6380 [2024-10-31 15:05:58,774 INFO L226 Difference]: Without dead ends: 4291 [2024-10-31 15:05:58,776 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 708 GetRequests, 707 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 15:05:58,778 INFO L432 NwaCegarLoop]: 312 mSDtfsCounter, 121 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 474 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 15:05:58,778 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 474 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 15:05:58,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4291 states. [2024-10-31 15:05:58,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4291 to 4199. [2024-10-31 15:05:58,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4199 states, 4198 states have (on average 1.2794187708432587) internal successors, (5371), 4198 states have internal predecessors, (5371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 15:05:58,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4199 states to 4199 states and 5371 transitions. [2024-10-31 15:05:58,885 INFO L78 Accepts]: Start accepts. Automaton has 4199 states and 5371 transitions. Word has length 355 [2024-10-31 15:05:58,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:05:58,886 INFO L471 AbstractCegarLoop]: Abstraction has 4199 states and 5371 transitions. [2024-10-31 15:05:58,886 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 15:05:58,886 INFO L276 IsEmpty]: Start isEmpty. Operand 4199 states and 5371 transitions. [2024-10-31 15:05:58,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 357 [2024-10-31 15:05:58,892 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:05:58,893 INFO L215 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 10, 9, 8, 8, 7, 7, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 15:05:58,893 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-10-31 15:05:58,893 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:05:58,894 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:05:58,894 INFO L85 PathProgramCache]: Analyzing trace with hash -1411878677, now seen corresponding path program 1 times [2024-10-31 15:05:58,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:05:58,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [316818277] [2024-10-31 15:05:58,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:05:58,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:05:58,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:05:58,936 INFO L255 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-31 15:05:58,939 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:05:59,027 INFO L134 CoverageAnalysis]: Checked inductivity of 1310 backedges. 852 proven. 26 refuted. 0 times theorem prover too weak. 432 trivial. 0 not checked. [2024-10-31 15:05:59,028 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:05:59,107 INFO L134 CoverageAnalysis]: Checked inductivity of 1310 backedges. 852 proven. 26 refuted. 0 times theorem prover too weak. 432 trivial. 0 not checked. [2024-10-31 15:05:59,108 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:05:59,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [316818277] [2024-10-31 15:05:59,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [316818277] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 15:05:59,108 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 15:05:59,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2024-10-31 15:05:59,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667397532] [2024-10-31 15:05:59,110 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 15:05:59,111 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 15:05:59,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:05:59,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 15:05:59,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 15:05:59,112 INFO L87 Difference]: Start difference. First operand 4199 states and 5371 transitions. Second operand has 4 states, 4 states have (on average 42.5) internal successors, (170), 4 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 15:05:59,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:05:59,461 INFO L93 Difference]: Finished difference Result 12233 states and 15541 transitions. [2024-10-31 15:05:59,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 15:05:59,461 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 42.5) internal successors, (170), 4 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 356 [2024-10-31 15:05:59,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:05:59,475 INFO L225 Difference]: With dead ends: 12233 [2024-10-31 15:05:59,475 INFO L226 Difference]: Without dead ends: 8157 [2024-10-31 15:05:59,479 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 712 GetRequests, 709 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-10-31 15:05:59,480 INFO L432 NwaCegarLoop]: 318 mSDtfsCounter, 123 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 639 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-31 15:05:59,480 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 639 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-31 15:05:59,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8157 states. [2024-10-31 15:05:59,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8157 to 5499. [2024-10-31 15:05:59,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5499 states, 5498 states have (on average 1.2781011276827938) internal successors, (7027), 5498 states have internal predecessors, (7027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 15:05:59,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5499 states to 5499 states and 7027 transitions. [2024-10-31 15:05:59,602 INFO L78 Accepts]: Start accepts. Automaton has 5499 states and 7027 transitions. Word has length 356 [2024-10-31 15:05:59,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:05:59,602 INFO L471 AbstractCegarLoop]: Abstraction has 5499 states and 7027 transitions. [2024-10-31 15:05:59,602 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 42.5) internal successors, (170), 4 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 15:05:59,602 INFO L276 IsEmpty]: Start isEmpty. Operand 5499 states and 7027 transitions. [2024-10-31 15:05:59,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 387 [2024-10-31 15:05:59,610 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:05:59,610 INFO L215 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 11, 10, 9, 9, 8, 8, 7, 7, 7, 7, 5, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 15:05:59,610 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-10-31 15:05:59,610 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:05:59,611 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:05:59,611 INFO L85 PathProgramCache]: Analyzing trace with hash 258910961, now seen corresponding path program 1 times [2024-10-31 15:05:59,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:05:59,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1855291776] [2024-10-31 15:05:59,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:05:59,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:05:59,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:05:59,657 INFO L255 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-31 15:05:59,660 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:05:59,693 INFO L134 CoverageAnalysis]: Checked inductivity of 1574 backedges. 893 proven. 0 refuted. 0 times theorem prover too weak. 681 trivial. 0 not checked. [2024-10-31 15:05:59,693 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:05:59,741 INFO L134 CoverageAnalysis]: Checked inductivity of 1574 backedges. 893 proven. 0 refuted. 0 times theorem prover too weak. 681 trivial. 0 not checked. [2024-10-31 15:05:59,742 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:05:59,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1855291776] [2024-10-31 15:05:59,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1855291776] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 15:05:59,742 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 15:05:59,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2024-10-31 15:05:59,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328437691] [2024-10-31 15:05:59,743 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 15:05:59,744 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 15:05:59,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:05:59,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 15:05:59,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 15:05:59,745 INFO L87 Difference]: Start difference. First operand 5499 states and 7027 transitions. Second operand has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 15:05:59,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:05:59,919 INFO L93 Difference]: Finished difference Result 11397 states and 14596 transitions. [2024-10-31 15:05:59,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 15:05:59,920 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 386 [2024-10-31 15:05:59,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:05:59,931 INFO L225 Difference]: With dead ends: 11397 [2024-10-31 15:05:59,931 INFO L226 Difference]: Without dead ends: 5919 [2024-10-31 15:05:59,938 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 770 GetRequests, 769 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 15:05:59,939 INFO L432 NwaCegarLoop]: 181 mSDtfsCounter, 9 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 15:05:59,939 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 267 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 15:05:59,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5919 states. [2024-10-31 15:06:00,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5919 to 5919. [2024-10-31 15:06:00,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5919 states, 5918 states have (on average 1.2761067928354173) internal successors, (7552), 5918 states have internal predecessors, (7552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 15:06:00,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5919 states to 5919 states and 7552 transitions. [2024-10-31 15:06:00,095 INFO L78 Accepts]: Start accepts. Automaton has 5919 states and 7552 transitions. Word has length 386 [2024-10-31 15:06:00,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:06:00,095 INFO L471 AbstractCegarLoop]: Abstraction has 5919 states and 7552 transitions. [2024-10-31 15:06:00,096 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 15:06:00,096 INFO L276 IsEmpty]: Start isEmpty. Operand 5919 states and 7552 transitions. [2024-10-31 15:06:00,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 388 [2024-10-31 15:06:00,102 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:06:00,102 INFO L215 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 11, 10, 9, 9, 8, 8, 7, 7, 7, 7, 5, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 15:06:00,102 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-10-31 15:06:00,104 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:06:00,104 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:06:00,104 INFO L85 PathProgramCache]: Analyzing trace with hash -284409887, now seen corresponding path program 1 times [2024-10-31 15:06:00,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:06:00,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [628303304] [2024-10-31 15:06:00,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:06:00,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:06:00,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:06:00,142 INFO L255 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-31 15:06:00,145 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:06:00,195 INFO L134 CoverageAnalysis]: Checked inductivity of 1574 backedges. 948 proven. 0 refuted. 0 times theorem prover too weak. 626 trivial. 0 not checked. [2024-10-31 15:06:00,195 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:06:00,241 INFO L134 CoverageAnalysis]: Checked inductivity of 1574 backedges. 948 proven. 0 refuted. 0 times theorem prover too weak. 626 trivial. 0 not checked. [2024-10-31 15:06:00,241 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:06:00,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [628303304] [2024-10-31 15:06:00,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [628303304] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 15:06:00,241 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 15:06:00,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2024-10-31 15:06:00,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749467010] [2024-10-31 15:06:00,241 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 15:06:00,242 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 15:06:00,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:06:00,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 15:06:00,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 15:06:00,243 INFO L87 Difference]: Start difference. First operand 5919 states and 7552 transitions. Second operand has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)