/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --cacsl2boogietranslator.allow.undefined.functions true --traceabstraction.smt.solver Internal_SMTInterpol -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Bitvector.epf -i ../../../trunk/examples/svcomp/bitvector/soft_float_2a.c.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.5-dev-356b6ba-m [2024-10-31 15:04:36,880 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-31 15:04:36,967 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 15:04:37,018 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-31 15:04:37,019 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-31 15:04:37,019 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-31 15:04:37,020 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-31 15:04:37,020 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-31 15:04:37,021 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-31 15:04:37,021 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-31 15:04:37,021 INFO L153 SettingsManager]: * Use SBE=true [2024-10-31 15:04:37,022 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-31 15:04:37,022 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-31 15:04:37,022 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-31 15:04:37,023 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-31 15:04:37,026 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-31 15:04:37,028 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-31 15:04:37,028 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-31 15:04:37,029 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-31 15:04:37,029 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-31 15:04:37,029 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-10-31 15:04:37,032 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-31 15:04:37,032 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-10-31 15:04:37,033 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-31 15:04:37,033 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-31 15:04:37,033 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-31 15:04:37,033 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-31 15:04:37,034 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-31 15:04:37,034 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-31 15:04:37,034 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-31 15:04:37,034 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 15:04:37,035 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-31 15:04:37,035 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-31 15:04:37,035 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-31 15:04:37,036 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2024-10-31 15:04:37,036 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-10-31 15:04:37,036 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-31 15:04:37,036 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-31 15:04:37,037 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-31 15:04:37,037 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-31 15:04:37,037 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2024-10-31 15:04:37,038 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Allow undefined functions -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol [2024-10-31 15:04:37,395 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-31 15:04:37,420 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-31 15:04:37,424 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-31 15:04:37,426 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-31 15:04:37,426 INFO L274 PluginConnector]: CDTParser initialized [2024-10-31 15:04:37,428 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/soft_float_2a.c.cil.c [2024-10-31 15:04:39,050 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-31 15:04:39,306 INFO L384 CDTParser]: Found 1 translation units. [2024-10-31 15:04:39,308 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/bitvector/soft_float_2a.c.cil.c [2024-10-31 15:04:39,321 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/327bb6fbb/5772376321da4346ad2af64a627fe3b8/FLAG2432616b5 [2024-10-31 15:04:39,341 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/327bb6fbb/5772376321da4346ad2af64a627fe3b8 [2024-10-31 15:04:39,344 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-31 15:04:39,346 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-10-31 15:04:39,348 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-31 15:04:39,348 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-31 15:04:39,357 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-31 15:04:39,358 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 03:04:39" (1/1) ... [2024-10-31 15:04:39,359 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4eb54839 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 03:04:39, skipping insertion in model container [2024-10-31 15:04:39,359 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 03:04:39" (1/1) ... [2024-10-31 15:04:39,389 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-31 15:04:39,562 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/soft_float_2a.c.cil.c[728,741] [2024-10-31 15:04:39,627 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 15:04:39,643 INFO L200 MainTranslator]: Completed pre-run [2024-10-31 15:04:39,654 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/soft_float_2a.c.cil.c[728,741] [2024-10-31 15:04:39,695 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 15:04:39,712 INFO L204 MainTranslator]: Completed translation [2024-10-31 15:04:39,712 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 03:04:39 WrapperNode [2024-10-31 15:04:39,712 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-31 15:04:39,713 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-31 15:04:39,713 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-31 15:04:39,714 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-31 15:04:39,719 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 03:04:39" (1/1) ... [2024-10-31 15:04:39,728 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 03:04:39" (1/1) ... [2024-10-31 15:04:39,753 INFO L138 Inliner]: procedures = 17, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 113 [2024-10-31 15:04:39,753 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-31 15:04:39,754 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-31 15:04:39,754 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-31 15:04:39,754 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-31 15:04:39,762 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 03:04:39" (1/1) ... [2024-10-31 15:04:39,763 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 03:04:39" (1/1) ... [2024-10-31 15:04:39,766 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 03:04:39" (1/1) ... [2024-10-31 15:04:39,785 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 15:04:39,785 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 03:04:39" (1/1) ... [2024-10-31 15:04:39,785 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 03:04:39" (1/1) ... [2024-10-31 15:04:39,801 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 03:04:39" (1/1) ... [2024-10-31 15:04:39,808 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 03:04:39" (1/1) ... [2024-10-31 15:04:39,810 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 03:04:39" (1/1) ... [2024-10-31 15:04:39,817 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 03:04:39" (1/1) ... [2024-10-31 15:04:39,820 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-31 15:04:39,821 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-31 15:04:39,821 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-31 15:04:39,821 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-31 15:04:39,826 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 03:04:39" (1/1) ... [2024-10-31 15:04:39,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 15:04:39,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-31 15:04:39,861 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 15:04:39,864 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 15:04:39,890 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-31 15:04:39,890 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-10-31 15:04:39,890 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2024-10-31 15:04:39,891 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2024-10-31 15:04:39,891 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-31 15:04:39,891 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-31 15:04:39,891 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-10-31 15:04:39,891 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-10-31 15:04:39,967 INFO L238 CfgBuilder]: Building ICFG [2024-10-31 15:04:39,969 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-31 15:04:40,393 INFO L? ?]: Removed 44 outVars from TransFormulas that were not future-live. [2024-10-31 15:04:40,393 INFO L287 CfgBuilder]: Performing block encoding [2024-10-31 15:04:40,413 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-31 15:04:40,414 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-10-31 15:04:40,414 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 03:04:40 BoogieIcfgContainer [2024-10-31 15:04:40,414 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-31 15:04:40,417 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-31 15:04:40,417 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-31 15:04:40,421 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-31 15:04:40,421 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.10 03:04:39" (1/3) ... [2024-10-31 15:04:40,422 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c80dfc2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 03:04:40, skipping insertion in model container [2024-10-31 15:04:40,422 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 03:04:39" (2/3) ... [2024-10-31 15:04:40,422 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c80dfc2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 03:04:40, skipping insertion in model container [2024-10-31 15:04:40,423 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 03:04:40" (3/3) ... [2024-10-31 15:04:40,425 INFO L112 eAbstractionObserver]: Analyzing ICFG soft_float_2a.c.cil.c [2024-10-31 15:04:40,442 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-31 15:04:40,443 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-31 15:04:40,512 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-31 15:04:40,519 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;@57ea7412, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-31 15:04:40,519 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-31 15:04:40,526 INFO L276 IsEmpty]: Start isEmpty. Operand has 52 states, 43 states have (on average 1.558139534883721) internal successors, (67), 45 states have internal predecessors, (67), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-10-31 15:04:40,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-10-31 15:04:40,535 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:04:40,536 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 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 15:04:40,537 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:04:40,541 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:04:40,541 INFO L85 PathProgramCache]: Analyzing trace with hash 1428146956, now seen corresponding path program 1 times [2024-10-31 15:04:40,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:04:40,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1825363907] [2024-10-31 15:04:40,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:04:40,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:04:40,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:04:40,713 INFO L255 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-31 15:04:40,720 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:04:40,839 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-31 15:04:40,843 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:04:40,990 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-10-31 15:04:40,991 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:04:40,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1825363907] [2024-10-31 15:04:40,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1825363907] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-31 15:04:40,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-31 15:04:40,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2024-10-31 15:04:40,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052209845] [2024-10-31 15:04:40,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 15:04:40,999 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 15:04:41,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:04:41,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 15:04:41,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-10-31 15:04:41,026 INFO L87 Difference]: Start difference. First operand has 52 states, 43 states have (on average 1.558139534883721) internal successors, (67), 45 states have internal predecessors, (67), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-31 15:04:41,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:04:41,191 INFO L93 Difference]: Finished difference Result 115 states and 181 transitions. [2024-10-31 15:04:41,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 15:04:41,195 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 42 [2024-10-31 15:04:41,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:04:41,205 INFO L225 Difference]: With dead ends: 115 [2024-10-31 15:04:41,205 INFO L226 Difference]: Without dead ends: 60 [2024-10-31 15:04:41,209 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-10-31 15:04:41,215 INFO L432 NwaCegarLoop]: 60 mSDtfsCounter, 12 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 15:04:41,216 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 166 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 15:04:41,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-10-31 15:04:41,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 51. [2024-10-31 15:04:41,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 43 states have (on average 1.3953488372093024) internal successors, (60), 43 states have internal predecessors, (60), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-10-31 15:04:41,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 71 transitions. [2024-10-31 15:04:41,254 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 71 transitions. Word has length 42 [2024-10-31 15:04:41,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:04:41,254 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 71 transitions. [2024-10-31 15:04:41,255 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-31 15:04:41,255 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 71 transitions. [2024-10-31 15:04:41,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-10-31 15:04:41,257 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:04:41,257 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 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 15:04:41,257 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-31 15:04:41,258 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:04:41,258 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:04:41,258 INFO L85 PathProgramCache]: Analyzing trace with hash -649725496, now seen corresponding path program 1 times [2024-10-31 15:04:41,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:04:41,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [665662775] [2024-10-31 15:04:41,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:04:41,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:04:41,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:04:41,383 INFO L255 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-31 15:04:41,387 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:04:41,490 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-10-31 15:04:41,490 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:04:41,600 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-10-31 15:04:41,601 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:04:41,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [665662775] [2024-10-31 15:04:41,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [665662775] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 15:04:41,602 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 15:04:41,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 7 [2024-10-31 15:04:41,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995303655] [2024-10-31 15:04:41,602 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 15:04:41,604 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-31 15:04:41,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:04:41,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-31 15:04:41,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-10-31 15:04:41,608 INFO L87 Difference]: Start difference. First operand 51 states and 71 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-10-31 15:04:41,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:04:41,698 INFO L93 Difference]: Finished difference Result 74 states and 104 transitions. [2024-10-31 15:04:41,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-31 15:04:41,700 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 45 [2024-10-31 15:04:41,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:04:41,702 INFO L225 Difference]: With dead ends: 74 [2024-10-31 15:04:41,702 INFO L226 Difference]: Without dead ends: 54 [2024-10-31 15:04:41,703 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-10-31 15:04:41,706 INFO L432 NwaCegarLoop]: 55 mSDtfsCounter, 48 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 15:04:41,707 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 241 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 15:04:41,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-10-31 15:04:41,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 51. [2024-10-31 15:04:41,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 43 states have (on average 1.3488372093023255) internal successors, (58), 43 states have internal predecessors, (58), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-10-31 15:04:41,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 69 transitions. [2024-10-31 15:04:41,723 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 69 transitions. Word has length 45 [2024-10-31 15:04:41,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:04:41,724 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 69 transitions. [2024-10-31 15:04:41,724 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-10-31 15:04:41,724 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 69 transitions. [2024-10-31 15:04:41,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-10-31 15:04:41,726 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:04:41,728 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:04:41,728 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-31 15:04:41,729 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:04:41,734 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:04:41,734 INFO L85 PathProgramCache]: Analyzing trace with hash 2040676328, now seen corresponding path program 1 times [2024-10-31 15:04:41,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:04:41,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1614832133] [2024-10-31 15:04:41,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:04:41,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:04:41,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:04:41,850 INFO L255 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-31 15:04:41,853 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:04:41,948 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-10-31 15:04:41,948 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:04:42,043 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-31 15:04:42,044 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:04:42,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1614832133] [2024-10-31 15:04:42,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1614832133] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-31 15:04:42,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-31 15:04:42,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2024-10-31 15:04:42,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005939779] [2024-10-31 15:04:42,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 15:04:42,045 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 15:04:42,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:04:42,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 15:04:42,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-10-31 15:04:42,048 INFO L87 Difference]: Start difference. First operand 51 states and 69 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-31 15:04:42,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:04:42,075 INFO L93 Difference]: Finished difference Result 72 states and 97 transitions. [2024-10-31 15:04:42,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 15:04:42,077 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 49 [2024-10-31 15:04:42,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:04:42,078 INFO L225 Difference]: With dead ends: 72 [2024-10-31 15:04:42,078 INFO L226 Difference]: Without dead ends: 51 [2024-10-31 15:04:42,078 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-10-31 15:04:42,079 INFO L432 NwaCegarLoop]: 62 mSDtfsCounter, 13 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 15:04:42,080 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 181 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 15:04:42,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-10-31 15:04:42,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2024-10-31 15:04:42,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 43 states have (on average 1.3255813953488371) internal successors, (57), 43 states have internal predecessors, (57), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-10-31 15:04:42,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 68 transitions. [2024-10-31 15:04:42,092 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 68 transitions. Word has length 49 [2024-10-31 15:04:42,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:04:42,093 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 68 transitions. [2024-10-31 15:04:42,094 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-31 15:04:42,094 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 68 transitions. [2024-10-31 15:04:42,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-10-31 15:04:42,095 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:04:42,096 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:04:42,096 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-31 15:04:42,096 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:04:42,096 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:04:42,096 INFO L85 PathProgramCache]: Analyzing trace with hash 760812650, now seen corresponding path program 1 times [2024-10-31 15:04:42,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:04:42,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1373520821] [2024-10-31 15:04:42,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:04:42,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:04:42,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:04:42,164 INFO L255 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-31 15:04:42,169 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:04:42,239 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-10-31 15:04:42,239 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:04:42,308 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-10-31 15:04:42,309 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:04:42,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1373520821] [2024-10-31 15:04:42,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1373520821] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 15:04:42,309 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 15:04:42,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 8 [2024-10-31 15:04:42,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719711680] [2024-10-31 15:04:42,309 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 15:04:42,310 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-31 15:04:42,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:04:42,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-31 15:04:42,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-10-31 15:04:42,311 INFO L87 Difference]: Start difference. First operand 51 states and 68 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-31 15:04:42,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:04:42,402 INFO L93 Difference]: Finished difference Result 79 states and 106 transitions. [2024-10-31 15:04:42,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-31 15:04:42,404 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 49 [2024-10-31 15:04:42,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:04:42,406 INFO L225 Difference]: With dead ends: 79 [2024-10-31 15:04:42,406 INFO L226 Difference]: Without dead ends: 61 [2024-10-31 15:04:42,409 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-10-31 15:04:42,410 INFO L432 NwaCegarLoop]: 56 mSDtfsCounter, 2 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 15:04:42,410 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 327 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 15:04:42,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2024-10-31 15:04:42,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2024-10-31 15:04:42,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 52 states have (on average 1.2692307692307692) internal successors, (66), 52 states have internal predecessors, (66), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2024-10-31 15:04:42,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 80 transitions. [2024-10-31 15:04:42,421 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 80 transitions. Word has length 49 [2024-10-31 15:04:42,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:04:42,422 INFO L471 AbstractCegarLoop]: Abstraction has 61 states and 80 transitions. [2024-10-31 15:04:42,422 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-31 15:04:42,426 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 80 transitions. [2024-10-31 15:04:42,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-10-31 15:04:42,428 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:04:42,428 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:04:42,428 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-31 15:04:42,428 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:04:42,429 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:04:42,429 INFO L85 PathProgramCache]: Analyzing trace with hash 1018978088, now seen corresponding path program 1 times [2024-10-31 15:04:42,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:04:42,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [95589651] [2024-10-31 15:04:42,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:04:42,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:04:42,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:04:42,488 INFO L255 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-31 15:04:42,490 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:04:42,526 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-31 15:04:42,526 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:04:42,596 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-31 15:04:42,597 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:04:42,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [95589651] [2024-10-31 15:04:42,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [95589651] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 15:04:42,598 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 15:04:42,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2024-10-31 15:04:42,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710156378] [2024-10-31 15:04:42,599 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 15:04:42,599 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-31 15:04:42,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:04:42,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-31 15:04:42,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-10-31 15:04:42,600 INFO L87 Difference]: Start difference. First operand 61 states and 80 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-31 15:04:42,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:04:42,696 INFO L93 Difference]: Finished difference Result 72 states and 91 transitions. [2024-10-31 15:04:42,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 15:04:42,697 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 49 [2024-10-31 15:04:42,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:04:42,699 INFO L225 Difference]: With dead ends: 72 [2024-10-31 15:04:42,699 INFO L226 Difference]: Without dead ends: 66 [2024-10-31 15:04:42,699 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-10-31 15:04:42,700 INFO L432 NwaCegarLoop]: 58 mSDtfsCounter, 0 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 15:04:42,703 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 316 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 15:04:42,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-10-31 15:04:42,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2024-10-31 15:04:42,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 57 states have (on average 1.2456140350877194) internal successors, (71), 57 states have internal predecessors, (71), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2024-10-31 15:04:42,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 85 transitions. [2024-10-31 15:04:42,714 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 85 transitions. Word has length 49 [2024-10-31 15:04:42,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:04:42,714 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 85 transitions. [2024-10-31 15:04:42,714 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-31 15:04:42,714 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 85 transitions. [2024-10-31 15:04:42,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-10-31 15:04:42,715 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:04:42,715 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:04:42,716 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-31 15:04:42,716 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:04:42,716 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:04:42,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1076236390, now seen corresponding path program 1 times [2024-10-31 15:04:42,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:04:42,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1512474791] [2024-10-31 15:04:42,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:04:42,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:04:42,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:04:42,748 INFO L255 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-31 15:04:42,753 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:04:42,824 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-10-31 15:04:42,825 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:04:42,913 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-31 15:04:42,914 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:04:42,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1512474791] [2024-10-31 15:04:42,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1512474791] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-31 15:04:42,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-31 15:04:42,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 10 [2024-10-31 15:04:42,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836384163] [2024-10-31 15:04:42,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 15:04:42,915 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-31 15:04:42,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:04:42,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-31 15:04:42,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-10-31 15:04:42,916 INFO L87 Difference]: Start difference. First operand 66 states and 85 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-31 15:04:42,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:04:42,955 INFO L93 Difference]: Finished difference Result 72 states and 90 transitions. [2024-10-31 15:04:42,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-31 15:04:42,956 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 49 [2024-10-31 15:04:42,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:04:42,957 INFO L225 Difference]: With dead ends: 72 [2024-10-31 15:04:42,957 INFO L226 Difference]: Without dead ends: 54 [2024-10-31 15:04:42,957 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-10-31 15:04:42,958 INFO L432 NwaCegarLoop]: 60 mSDtfsCounter, 1 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 15:04:42,958 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 294 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 15:04:42,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-10-31 15:04:42,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2024-10-31 15:04:42,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 45 states have (on average 1.2444444444444445) internal successors, (56), 46 states have internal predecessors, (56), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2024-10-31 15:04:42,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 68 transitions. [2024-10-31 15:04:42,965 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 68 transitions. Word has length 49 [2024-10-31 15:04:42,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:04:42,966 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 68 transitions. [2024-10-31 15:04:42,966 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-31 15:04:42,966 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 68 transitions. [2024-10-31 15:04:42,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-10-31 15:04:42,967 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:04:42,967 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 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 15:04:42,967 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-31 15:04:42,967 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:04:42,968 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:04:42,968 INFO L85 PathProgramCache]: Analyzing trace with hash -493123304, now seen corresponding path program 1 times [2024-10-31 15:04:42,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:04:42,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1303453362] [2024-10-31 15:04:42,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:04:42,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:04:43,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:04:43,075 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-31 15:04:43,078 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:04:43,172 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-10-31 15:04:43,172 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:04:43,227 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-10-31 15:04:43,227 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:04:43,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1303453362] [2024-10-31 15:04:43,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1303453362] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 15:04:43,227 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 15:04:43,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2024-10-31 15:04:43,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233608719] [2024-10-31 15:04:43,228 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 15:04:43,228 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-31 15:04:43,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:04:43,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-31 15:04:43,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-10-31 15:04:43,229 INFO L87 Difference]: Start difference. First operand 54 states and 68 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-31 15:04:43,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:04:43,294 INFO L93 Difference]: Finished difference Result 81 states and 100 transitions. [2024-10-31 15:04:43,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-31 15:04:43,296 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 54 [2024-10-31 15:04:43,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:04:43,297 INFO L225 Difference]: With dead ends: 81 [2024-10-31 15:04:43,297 INFO L226 Difference]: Without dead ends: 54 [2024-10-31 15:04:43,297 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-10-31 15:04:43,298 INFO L432 NwaCegarLoop]: 52 mSDtfsCounter, 1 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 15:04:43,298 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 353 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 15:04:43,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-10-31 15:04:43,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2024-10-31 15:04:43,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 45 states have (on average 1.2444444444444445) internal successors, (56), 46 states have internal predecessors, (56), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-10-31 15:04:43,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 66 transitions. [2024-10-31 15:04:43,308 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 66 transitions. Word has length 54 [2024-10-31 15:04:43,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:04:43,308 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 66 transitions. [2024-10-31 15:04:43,312 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-31 15:04:43,312 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 66 transitions. [2024-10-31 15:04:43,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-10-31 15:04:43,313 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:04:43,313 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 15:04:43,313 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-10-31 15:04:43,313 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:04:43,314 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:04:43,314 INFO L85 PathProgramCache]: Analyzing trace with hash 973238989, now seen corresponding path program 2 times [2024-10-31 15:04:43,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:04:43,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1397266835] [2024-10-31 15:04:43,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:04:43,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:04:43,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:04:43,575 INFO L255 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-31 15:04:43,580 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:04:43,604 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-31 15:04:43,604 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:04:43,676 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-10-31 15:04:43,676 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:04:43,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1397266835] [2024-10-31 15:04:43,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1397266835] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-31 15:04:43,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-31 15:04:43,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2024-10-31 15:04:43,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846902399] [2024-10-31 15:04:43,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 15:04:43,677 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 15:04:43,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:04:43,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 15:04:43,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-10-31 15:04:43,678 INFO L87 Difference]: Start difference. First operand 54 states and 66 transitions. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-31 15:04:43,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:04:43,716 INFO L93 Difference]: Finished difference Result 110 states and 134 transitions. [2024-10-31 15:04:43,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 15:04:43,717 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 58 [2024-10-31 15:04:43,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:04:43,717 INFO L225 Difference]: With dead ends: 110 [2024-10-31 15:04:43,718 INFO L226 Difference]: Without dead ends: 60 [2024-10-31 15:04:43,718 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-10-31 15:04:43,719 INFO L432 NwaCegarLoop]: 55 mSDtfsCounter, 7 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 15:04:43,719 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 148 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 15:04:43,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-10-31 15:04:43,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 56. [2024-10-31 15:04:43,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 47 states have (on average 1.2340425531914894) internal successors, (58), 48 states have internal predecessors, (58), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-10-31 15:04:43,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 68 transitions. [2024-10-31 15:04:43,728 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 68 transitions. Word has length 58 [2024-10-31 15:04:43,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:04:43,730 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 68 transitions. [2024-10-31 15:04:43,730 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-31 15:04:43,730 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 68 transitions. [2024-10-31 15:04:43,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-10-31 15:04:43,730 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:04:43,730 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:04:43,731 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-10-31 15:04:43,731 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:04:43,731 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:04:43,731 INFO L85 PathProgramCache]: Analyzing trace with hash -2110656204, now seen corresponding path program 1 times [2024-10-31 15:04:43,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:04:43,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1065243376] [2024-10-31 15:04:43,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:04:43,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:04:43,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:04:43,759 INFO L255 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-31 15:04:43,760 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:04:43,794 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-31 15:04:43,795 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:04:43,854 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-10-31 15:04:43,855 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:04:43,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1065243376] [2024-10-31 15:04:43,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1065243376] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-31 15:04:43,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-31 15:04:43,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2024-10-31 15:04:43,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381059234] [2024-10-31 15:04:43,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 15:04:43,855 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 15:04:43,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:04:43,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 15:04:43,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-10-31 15:04:43,856 INFO L87 Difference]: Start difference. First operand 56 states and 68 transitions. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-31 15:04:43,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:04:43,916 INFO L93 Difference]: Finished difference Result 116 states and 143 transitions. [2024-10-31 15:04:43,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 15:04:43,917 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 59 [2024-10-31 15:04:43,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:04:43,918 INFO L225 Difference]: With dead ends: 116 [2024-10-31 15:04:43,918 INFO L226 Difference]: Without dead ends: 67 [2024-10-31 15:04:43,918 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-10-31 15:04:43,919 INFO L432 NwaCegarLoop]: 52 mSDtfsCounter, 15 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 15:04:43,919 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 137 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 15:04:43,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-10-31 15:04:43,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 60. [2024-10-31 15:04:43,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 50 states have (on average 1.22) internal successors, (61), 52 states have internal predecessors, (61), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2024-10-31 15:04:43,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 73 transitions. [2024-10-31 15:04:43,929 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 73 transitions. Word has length 59 [2024-10-31 15:04:43,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:04:43,929 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 73 transitions. [2024-10-31 15:04:43,929 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-31 15:04:43,930 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 73 transitions. [2024-10-31 15:04:43,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-10-31 15:04:43,930 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:04:43,930 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 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 15:04:43,930 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-10-31 15:04:43,930 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:04:43,931 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:04:43,931 INFO L85 PathProgramCache]: Analyzing trace with hash 892891596, now seen corresponding path program 1 times [2024-10-31 15:04:43,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:04:43,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [303861919] [2024-10-31 15:04:43,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:04:43,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:04:44,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:04:44,185 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-31 15:04:44,187 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:04:44,224 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-31 15:04:44,224 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:04:44,316 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-10-31 15:04:44,317 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:04:44,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [303861919] [2024-10-31 15:04:44,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [303861919] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-31 15:04:44,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-31 15:04:44,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2024-10-31 15:04:44,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045009404] [2024-10-31 15:04:44,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 15:04:44,318 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 15:04:44,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:04:44,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 15:04:44,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-10-31 15:04:44,318 INFO L87 Difference]: Start difference. First operand 60 states and 73 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-31 15:04:44,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:04:44,413 INFO L93 Difference]: Finished difference Result 130 states and 160 transitions. [2024-10-31 15:04:44,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-31 15:04:44,414 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 60 [2024-10-31 15:04:44,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:04:44,414 INFO L225 Difference]: With dead ends: 130 [2024-10-31 15:04:44,415 INFO L226 Difference]: Without dead ends: 77 [2024-10-31 15:04:44,415 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2024-10-31 15:04:44,416 INFO L432 NwaCegarLoop]: 54 mSDtfsCounter, 13 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 15:04:44,416 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 194 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 15:04:44,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2024-10-31 15:04:44,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 61. [2024-10-31 15:04:44,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 51 states have (on average 1.2352941176470589) internal successors, (63), 53 states have internal predecessors, (63), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2024-10-31 15:04:44,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 75 transitions. [2024-10-31 15:04:44,427 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 75 transitions. Word has length 60 [2024-10-31 15:04:44,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:04:44,427 INFO L471 AbstractCegarLoop]: Abstraction has 61 states and 75 transitions. [2024-10-31 15:04:44,427 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-31 15:04:44,427 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 75 transitions. [2024-10-31 15:04:44,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-10-31 15:04:44,428 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:04:44,428 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 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] [2024-10-31 15:04:44,428 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-10-31 15:04:44,428 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:04:44,428 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:04:44,429 INFO L85 PathProgramCache]: Analyzing trace with hash 2134089399, now seen corresponding path program 1 times [2024-10-31 15:04:44,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:04:44,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1261056556] [2024-10-31 15:04:44,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:04:44,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:04:44,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:04:44,618 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-31 15:04:44,622 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:04:44,672 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 26 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-31 15:04:44,672 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:04:44,787 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-10-31 15:04:44,787 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:04:44,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1261056556] [2024-10-31 15:04:44,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1261056556] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 15:04:44,787 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 15:04:44,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2024-10-31 15:04:44,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193136647] [2024-10-31 15:04:44,788 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 15:04:44,788 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-31 15:04:44,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:04:44,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-31 15:04:44,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-10-31 15:04:44,789 INFO L87 Difference]: Start difference. First operand 61 states and 75 transitions. Second operand has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-10-31 15:04:44,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:04:44,908 INFO L93 Difference]: Finished difference Result 139 states and 172 transitions. [2024-10-31 15:04:44,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-31 15:04:44,909 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 61 [2024-10-31 15:04:44,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:04:44,910 INFO L225 Difference]: With dead ends: 139 [2024-10-31 15:04:44,910 INFO L226 Difference]: Without dead ends: 79 [2024-10-31 15:04:44,911 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2024-10-31 15:04:44,911 INFO L432 NwaCegarLoop]: 58 mSDtfsCounter, 26 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 15:04:44,912 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 181 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 15:04:44,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2024-10-31 15:04:44,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 69. [2024-10-31 15:04:44,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 59 states have (on average 1.2372881355932204) internal successors, (73), 61 states have internal predecessors, (73), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2024-10-31 15:04:44,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 85 transitions. [2024-10-31 15:04:44,923 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 85 transitions. Word has length 61 [2024-10-31 15:04:44,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:04:44,923 INFO L471 AbstractCegarLoop]: Abstraction has 69 states and 85 transitions. [2024-10-31 15:04:44,923 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-10-31 15:04:44,923 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 85 transitions. [2024-10-31 15:04:44,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-10-31 15:04:44,924 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:04:44,924 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 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] [2024-10-31 15:04:44,924 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-10-31 15:04:44,924 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:04:44,925 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:04:44,925 INFO L85 PathProgramCache]: Analyzing trace with hash -221361354, now seen corresponding path program 1 times [2024-10-31 15:04:44,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:04:44,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1288035817] [2024-10-31 15:04:44,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:04:44,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:04:45,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:04:45,486 INFO L255 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-31 15:04:45,489 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:04:45,548 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 28 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-31 15:04:45,548 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:04:45,692 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-10-31 15:04:45,692 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:04:45,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1288035817] [2024-10-31 15:04:45,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1288035817] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 15:04:45,692 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 15:04:45,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2024-10-31 15:04:45,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023636637] [2024-10-31 15:04:45,693 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 15:04:45,693 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-31 15:04:45,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:04:45,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-31 15:04:45,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-10-31 15:04:45,694 INFO L87 Difference]: Start difference. First operand 69 states and 85 transitions. Second operand has 10 states, 10 states have (on average 6.3) internal successors, (63), 10 states have internal predecessors, (63), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-10-31 15:04:45,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:04:45,957 INFO L93 Difference]: Finished difference Result 154 states and 193 transitions. [2024-10-31 15:04:45,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-31 15:04:45,958 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.3) internal successors, (63), 10 states have internal predecessors, (63), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 63 [2024-10-31 15:04:45,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:04:45,959 INFO L225 Difference]: With dead ends: 154 [2024-10-31 15:04:45,959 INFO L226 Difference]: Without dead ends: 92 [2024-10-31 15:04:45,960 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=129, Unknown=0, NotChecked=0, Total=210 [2024-10-31 15:04:45,960 INFO L432 NwaCegarLoop]: 49 mSDtfsCounter, 39 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-31 15:04:45,961 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 305 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-31 15:04:45,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2024-10-31 15:04:45,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 73. [2024-10-31 15:04:45,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 63 states have (on average 1.2698412698412698) internal successors, (80), 65 states have internal predecessors, (80), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2024-10-31 15:04:45,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 92 transitions. [2024-10-31 15:04:45,975 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 92 transitions. Word has length 63 [2024-10-31 15:04:45,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:04:45,976 INFO L471 AbstractCegarLoop]: Abstraction has 73 states and 92 transitions. [2024-10-31 15:04:45,976 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.3) internal successors, (63), 10 states have internal predecessors, (63), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-10-31 15:04:45,976 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 92 transitions. [2024-10-31 15:04:45,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-10-31 15:04:45,977 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:04:45,977 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 15:04:45,977 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-10-31 15:04:45,977 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:04:45,978 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:04:45,978 INFO L85 PathProgramCache]: Analyzing trace with hash -96427443, now seen corresponding path program 2 times [2024-10-31 15:04:45,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:04:45,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [486259219] [2024-10-31 15:04:45,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:04:45,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:04:46,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:04:46,484 INFO L255 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-31 15:04:46,487 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:04:46,626 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 26 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-31 15:04:46,626 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:04:47,003 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 4 proven. 36 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-10-31 15:04:47,003 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:04:47,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [486259219] [2024-10-31 15:04:47,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [486259219] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 15:04:47,004 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 15:04:47,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2024-10-31 15:04:47,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783985814] [2024-10-31 15:04:47,004 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 15:04:47,004 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-31 15:04:47,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:04:47,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-31 15:04:47,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2024-10-31 15:04:47,006 INFO L87 Difference]: Start difference. First operand 73 states and 92 transitions. Second operand has 14 states, 14 states have (on average 5.5) internal successors, (77), 14 states have internal predecessors, (77), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-10-31 15:04:47,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:04:47,453 INFO L93 Difference]: Finished difference Result 174 states and 221 transitions. [2024-10-31 15:04:47,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-31 15:04:47,454 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.5) internal successors, (77), 14 states have internal predecessors, (77), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 70 [2024-10-31 15:04:47,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:04:47,456 INFO L225 Difference]: With dead ends: 174 [2024-10-31 15:04:47,456 INFO L226 Difference]: Without dead ends: 102 [2024-10-31 15:04:47,457 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=117, Invalid=189, Unknown=0, NotChecked=0, Total=306 [2024-10-31 15:04:47,458 INFO L432 NwaCegarLoop]: 67 mSDtfsCounter, 55 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-31 15:04:47,458 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 429 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-31 15:04:47,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2024-10-31 15:04:47,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 87. [2024-10-31 15:04:47,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 77 states have (on average 1.2597402597402598) internal successors, (97), 79 states have internal predecessors, (97), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2024-10-31 15:04:47,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 109 transitions. [2024-10-31 15:04:47,469 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 109 transitions. Word has length 70 [2024-10-31 15:04:47,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:04:47,473 INFO L471 AbstractCegarLoop]: Abstraction has 87 states and 109 transitions. [2024-10-31 15:04:47,474 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.5) internal successors, (77), 14 states have internal predecessors, (77), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-10-31 15:04:47,474 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 109 transitions. [2024-10-31 15:04:47,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2024-10-31 15:04:47,475 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:04:47,475 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 15:04:47,475 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-10-31 15:04:47,475 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:04:47,475 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:04:47,475 INFO L85 PathProgramCache]: Analyzing trace with hash -1216230474, now seen corresponding path program 2 times [2024-10-31 15:04:47,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:04:47,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1147956199] [2024-10-31 15:04:47,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:04:47,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:04:48,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:04:48,082 INFO L255 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-31 15:04:48,084 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:04:48,220 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 28 proven. 45 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-31 15:04:48,220 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:04:48,569 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 4 proven. 57 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-10-31 15:04:48,569 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:04:48,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1147956199] [2024-10-31 15:04:48,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1147956199] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 15:04:48,569 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 15:04:48,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2024-10-31 15:04:48,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350439964] [2024-10-31 15:04:48,570 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 15:04:48,570 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-31 15:04:48,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:04:48,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-31 15:04:48,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2024-10-31 15:04:48,571 INFO L87 Difference]: Start difference. First operand 87 states and 109 transitions. Second operand has 18 states, 18 states have (on average 4.833333333333333) internal successors, (87), 18 states have internal predecessors, (87), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-10-31 15:04:49,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:04:49,367 INFO L93 Difference]: Finished difference Result 206 states and 261 transitions. [2024-10-31 15:04:49,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-10-31 15:04:49,368 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.833333333333333) internal successors, (87), 18 states have internal predecessors, (87), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 75 [2024-10-31 15:04:49,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:04:49,369 INFO L225 Difference]: With dead ends: 206 [2024-10-31 15:04:49,369 INFO L226 Difference]: Without dead ends: 126 [2024-10-31 15:04:49,370 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=325, Invalid=605, Unknown=0, NotChecked=0, Total=930 [2024-10-31 15:04:49,370 INFO L432 NwaCegarLoop]: 53 mSDtfsCounter, 124 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-31 15:04:49,370 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 426 Invalid, 443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-31 15:04:49,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2024-10-31 15:04:49,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 97. [2024-10-31 15:04:49,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 87 states have (on average 1.3103448275862069) internal successors, (114), 89 states have internal predecessors, (114), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2024-10-31 15:04:49,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 126 transitions. [2024-10-31 15:04:49,384 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 126 transitions. Word has length 75 [2024-10-31 15:04:49,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:04:49,384 INFO L471 AbstractCegarLoop]: Abstraction has 97 states and 126 transitions. [2024-10-31 15:04:49,384 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.833333333333333) internal successors, (87), 18 states have internal predecessors, (87), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-10-31 15:04:49,385 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 126 transitions. [2024-10-31 15:04:49,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2024-10-31 15:04:49,385 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:04:49,385 INFO L215 NwaCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 15:04:49,386 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-10-31 15:04:49,386 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:04:49,386 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:04:49,386 INFO L85 PathProgramCache]: Analyzing trace with hash -805908083, now seen corresponding path program 3 times [2024-10-31 15:04:49,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:04:49,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [420923103] [2024-10-31 15:04:49,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:04:49,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:04:49,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:04:49,819 INFO L255 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-10-31 15:04:49,825 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:04:50,008 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2024-10-31 15:04:50,008 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:04:51,221 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2024-10-31 15:04:51,221 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:04:51,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [420923103] [2024-10-31 15:04:51,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [420923103] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 15:04:51,221 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 15:04:51,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 22 [2024-10-31 15:04:51,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918584394] [2024-10-31 15:04:51,222 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 15:04:51,222 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-10-31 15:04:51,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:04:51,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-10-31 15:04:51,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2024-10-31 15:04:51,223 INFO L87 Difference]: Start difference. First operand 97 states and 126 transitions. Second operand has 22 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 18 states have internal predecessors, (52), 5 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (8), 6 states have call predecessors, (8), 4 states have call successors, (8) [2024-10-31 15:04:51,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:04:51,833 INFO L93 Difference]: Finished difference Result 118 states and 150 transitions. [2024-10-31 15:04:51,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-31 15:04:51,834 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 18 states have internal predecessors, (52), 5 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (8), 6 states have call predecessors, (8), 4 states have call successors, (8) Word has length 88 [2024-10-31 15:04:51,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:04:51,836 INFO L225 Difference]: With dead ends: 118 [2024-10-31 15:04:51,836 INFO L226 Difference]: Without dead ends: 100 [2024-10-31 15:04:51,836 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 150 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2024-10-31 15:04:51,837 INFO L432 NwaCegarLoop]: 45 mSDtfsCounter, 28 mSDsluCounter, 520 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 565 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-31 15:04:51,837 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 565 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-31 15:04:51,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2024-10-31 15:04:51,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 97. [2024-10-31 15:04:51,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 87 states have (on average 1.2758620689655173) internal successors, (111), 89 states have internal predecessors, (111), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2024-10-31 15:04:51,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 123 transitions. [2024-10-31 15:04:51,849 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 123 transitions. Word has length 88 [2024-10-31 15:04:51,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:04:51,850 INFO L471 AbstractCegarLoop]: Abstraction has 97 states and 123 transitions. [2024-10-31 15:04:51,850 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 18 states have internal predecessors, (52), 5 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (8), 6 states have call predecessors, (8), 4 states have call successors, (8) [2024-10-31 15:04:51,850 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 123 transitions. [2024-10-31 15:04:51,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2024-10-31 15:04:51,851 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:04:51,851 INFO L215 NwaCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 15:04:51,851 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-10-31 15:04:51,851 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:04:51,852 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:04:51,852 INFO L85 PathProgramCache]: Analyzing trace with hash 1157021713, now seen corresponding path program 1 times [2024-10-31 15:04:51,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:04:51,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2019320809] [2024-10-31 15:04:51,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:04:51,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:04:52,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:04:52,468 INFO L255 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-10-31 15:04:52,471 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:04:52,643 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2024-10-31 15:04:52,643 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:05:07,631 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2024-10-31 15:05:07,632 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:05:07,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2019320809] [2024-10-31 15:05:07,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [2019320809] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 15:05:07,632 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 15:05:07,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 22 [2024-10-31 15:05:07,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719943923] [2024-10-31 15:05:07,632 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 15:05:07,633 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-10-31 15:05:07,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:05:07,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-10-31 15:05:07,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=396, Unknown=3, NotChecked=0, Total=462 [2024-10-31 15:05:07,634 INFO L87 Difference]: Start difference. First operand 97 states and 123 transitions. Second operand has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 19 states have internal predecessors, (56), 5 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (8), 6 states have call predecessors, (8), 4 states have call successors, (8) [2024-10-31 15:05:07,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:05:07,958 INFO L93 Difference]: Finished difference Result 97 states and 123 transitions. [2024-10-31 15:05:07,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-31 15:05:07,959 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 19 states have internal predecessors, (56), 5 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (8), 6 states have call predecessors, (8), 4 states have call successors, (8) Word has length 91 [2024-10-31 15:05:07,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:05:07,959 INFO L225 Difference]: With dead ends: 97 [2024-10-31 15:05:07,959 INFO L226 Difference]: Without dead ends: 0 [2024-10-31 15:05:07,960 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 157 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 14.5s TimeCoverageRelationStatistics Valid=93, Invalid=504, Unknown=3, NotChecked=0, Total=600 [2024-10-31 15:05:07,961 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 9 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-31 15:05:07,961 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 374 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-31 15:05:07,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-10-31 15:05:07,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-10-31 15:05:07,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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 15:05:07,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-10-31 15:05:07,962 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 91 [2024-10-31 15:05:07,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:05:07,962 INFO L471 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-10-31 15:05:07,962 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 19 states have internal predecessors, (56), 5 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (8), 6 states have call predecessors, (8), 4 states have call successors, (8) [2024-10-31 15:05:07,962 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-10-31 15:05:07,963 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-10-31 15:05:07,965 INFO L782 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-10-31 15:05:07,967 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-10-31 15:05:07,970 INFO L407 BasicCegarLoop]: Path program histogram: [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 15:05:07,972 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-10-31 15:05:08,313 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2024-10-31 15:05:08,343 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.10 03:05:08 BoogieIcfgContainer [2024-10-31 15:05:08,343 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-10-31 15:05:08,344 INFO L158 Benchmark]: Toolchain (without parser) took 28997.69ms. Allocated memory was 200.3MB in the beginning and 385.9MB in the end (delta: 185.6MB). Free memory was 175.7MB in the beginning and 185.9MB in the end (delta: -10.3MB). Peak memory consumption was 176.4MB. Max. memory is 8.0GB. [2024-10-31 15:05:08,344 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 200.3MB. Free memory was 176.9MB in the beginning and 176.9MB in the end (delta: 65.5kB). There was no memory consumed. Max. memory is 8.0GB. [2024-10-31 15:05:08,344 INFO L158 Benchmark]: CACSL2BoogieTranslator took 364.36ms. Allocated memory is still 200.3MB. Free memory was 175.7MB in the beginning and 160.0MB in the end (delta: 15.7MB). Peak memory consumption was 15.7MB. Max. memory is 8.0GB. [2024-10-31 15:05:08,344 INFO L158 Benchmark]: Boogie Procedure Inliner took 40.04ms. Allocated memory is still 200.3MB. Free memory was 160.0MB in the beginning and 158.4MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2024-10-31 15:05:08,344 INFO L158 Benchmark]: Boogie Preprocessor took 66.42ms. Allocated memory is still 200.3MB. Free memory was 158.4MB in the beginning and 156.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2024-10-31 15:05:08,345 INFO L158 Benchmark]: RCFGBuilder took 593.32ms. Allocated memory is still 200.3MB. Free memory was 156.3MB in the beginning and 139.0MB in the end (delta: 17.3MB). Peak memory consumption was 17.8MB. Max. memory is 8.0GB. [2024-10-31 15:05:08,345 INFO L158 Benchmark]: TraceAbstraction took 27926.16ms. Allocated memory was 200.3MB in the beginning and 385.9MB in the end (delta: 185.6MB). Free memory was 138.4MB in the beginning and 185.9MB in the end (delta: -47.5MB). Peak memory consumption was 139.7MB. Max. memory is 8.0GB. [2024-10-31 15:05:08,348 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 200.3MB. Free memory was 176.9MB in the beginning and 176.9MB in the end (delta: 65.5kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 364.36ms. Allocated memory is still 200.3MB. Free memory was 175.7MB in the beginning and 160.0MB in the end (delta: 15.7MB). Peak memory consumption was 15.7MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 40.04ms. Allocated memory is still 200.3MB. Free memory was 160.0MB in the beginning and 158.4MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 66.42ms. Allocated memory is still 200.3MB. Free memory was 158.4MB in the beginning and 156.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 593.32ms. Allocated memory is still 200.3MB. Free memory was 156.3MB in the beginning and 139.0MB in the end (delta: 17.3MB). Peak memory consumption was 17.8MB. Max. memory is 8.0GB. * TraceAbstraction took 27926.16ms. Allocated memory was 200.3MB in the beginning and 385.9MB in the end (delta: 185.6MB). Free memory was 138.4MB in the beginning and 185.9MB in the end (delta: -47.5MB). Peak memory consumption was 139.7MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 17]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 52 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 27.5s, OverallIterations: 16, TraceHistogramMax: 11, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 3.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 393 SdHoareTripleChecker+Valid, 2.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 393 mSDsluCounter, 4637 SdHoareTripleChecker+Invalid, 1.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 3770 mSDsCounter, 75 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1461 IncrementalHoareTripleChecker+Invalid, 1536 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 75 mSolverCounterUnsat, 867 mSDtfsCounter, 1461 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1937 GetRequests, 1757 SyntacticMatches, 7 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 17.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=97occurred in iteration=14, InterpolantAutomatonStates: 138, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 16 MinimizatonAttempts, 115 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 3.8s SatisfiabilityAnalysisTime, 19.6s InterpolantComputationTime, 962 NumberOfCodeBlocks, 962 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 1892 ConstructedInterpolants, 26 QuantifiedInterpolants, 4766 SizeOfPredicates, 28 NumberOfNonLiveVariables, 1758 ConjunctsInSsa, 141 ConjunctsInUnsatCore, 32 InterpolantComputations, 10 PerfectInterpolantSequences, 1548/1866 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 37]: Loop Invariant Derived loop invariant: ((0 != \old(m)) && ((1 != \old(m)) || (m < 16777216))) - InvariantResult [Line: 57]: Loop Invariant Derived loop invariant: (((!(((e + -4) % 4294967296) <= -128) || (0 != \old(e))) && ((0 != \old(e)) || !(e <= -128))) && !(\old(m) < 16777216)) - ProcedureContractResult [Line: 24]: Procedure Contract for base2flt Derived contract for procedure base2flt. Ensures: ((0 != m) || (0 == \result)) - ProcedureContractResult [Line: 15]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert. Requires: (0 != cond) Ensures: (0 != cond) RESULT: Ultimate proved your program to be correct! [2024-10-31 15:05:08,424 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request...