/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --cacsl2boogietranslator.allow.undefined.functions true --traceabstraction.smt.solver Internal_SMTInterpol -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Bitvector.epf -i ../../../trunk/examples/svcomp/bitvector/soft_float_4-3a.c.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.5-dev-b75d321-m [2024-11-02 19:56:29,933 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-02 19:56:30,006 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Bitvector.epf [2024-11-02 19:56:30,011 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-02 19:56:30,011 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-02 19:56:30,035 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-02 19:56:30,035 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-02 19:56:30,035 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-02 19:56:30,036 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-02 19:56:30,036 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-02 19:56:30,037 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-02 19:56:30,037 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-02 19:56:30,037 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-02 19:56:30,038 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-02 19:56:30,038 INFO L153 SettingsManager]: * Use SBE=true [2024-11-02 19:56:30,038 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-02 19:56:30,039 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-02 19:56:30,039 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-02 19:56:30,039 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-02 19:56:30,040 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-02 19:56:30,040 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-02 19:56:30,044 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-02 19:56:30,044 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-02 19:56:30,044 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-02 19:56:30,045 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-11-02 19:56:30,045 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-02 19:56:30,045 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-11-02 19:56:30,045 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-02 19:56:30,046 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-02 19:56:30,046 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-02 19:56:30,046 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-02 19:56:30,046 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-02 19:56:30,047 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-02 19:56:30,047 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-02 19:56:30,050 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-02 19:56:30,050 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-02 19:56:30,050 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-02 19:56:30,050 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-02 19:56:30,050 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2024-11-02 19:56:30,051 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-11-02 19:56:30,051 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-02 19:56:30,051 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-02 19:56:30,051 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-02 19:56:30,052 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-02 19:56:30,052 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Allow undefined functions -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol [2024-11-02 19:56:30,277 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-02 19:56:30,301 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-02 19:56:30,305 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-02 19:56:30,306 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-02 19:56:30,306 INFO L274 PluginConnector]: CDTParser initialized [2024-11-02 19:56:30,308 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/soft_float_4-3a.c.cil.c [2024-11-02 19:56:31,742 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-02 19:56:31,918 INFO L384 CDTParser]: Found 1 translation units. [2024-11-02 19:56:31,919 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/bitvector/soft_float_4-3a.c.cil.c [2024-11-02 19:56:31,927 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aab358e6b/a5df869228b2448098a93e5581cb1a45/FLAG8c1aebecd [2024-11-02 19:56:31,940 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aab358e6b/a5df869228b2448098a93e5581cb1a45 [2024-11-02 19:56:31,942 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-02 19:56:31,944 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-11-02 19:56:31,945 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-02 19:56:31,945 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-02 19:56:31,950 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-02 19:56:31,951 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 07:56:31" (1/1) ... [2024-11-02 19:56:31,952 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a618594 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 07:56:31, skipping insertion in model container [2024-11-02 19:56:31,952 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 07:56:31" (1/1) ... [2024-11-02 19:56:31,979 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-02 19:56:32,147 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/bitvector/soft_float_4-3a.c.cil.c[730,743] [2024-11-02 19:56:32,195 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 19:56:32,205 INFO L200 MainTranslator]: Completed pre-run [2024-11-02 19:56:32,219 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/bitvector/soft_float_4-3a.c.cil.c[730,743] [2024-11-02 19:56:32,245 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 19:56:32,257 INFO L204 MainTranslator]: Completed translation [2024-11-02 19:56:32,258 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 07:56:32 WrapperNode [2024-11-02 19:56:32,258 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-02 19:56:32,259 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-02 19:56:32,259 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-02 19:56:32,259 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-02 19:56:32,264 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 07:56:32" (1/1) ... [2024-11-02 19:56:32,272 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 07:56:32" (1/1) ... [2024-11-02 19:56:32,285 INFO L138 Inliner]: procedures = 17, calls = 18, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 54 [2024-11-02 19:56:32,286 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-02 19:56:32,286 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-02 19:56:32,286 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-02 19:56:32,287 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-02 19:56:32,294 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 07:56:32" (1/1) ... [2024-11-02 19:56:32,295 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 07:56:32" (1/1) ... [2024-11-02 19:56:32,297 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 07:56:32" (1/1) ... [2024-11-02 19:56:32,307 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-11-02 19:56:32,308 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 07:56:32" (1/1) ... [2024-11-02 19:56:32,308 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 07:56:32" (1/1) ... [2024-11-02 19:56:32,313 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 07:56:32" (1/1) ... [2024-11-02 19:56:32,317 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 07:56:32" (1/1) ... [2024-11-02 19:56:32,318 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 07:56:32" (1/1) ... [2024-11-02 19:56:32,319 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 07:56:32" (1/1) ... [2024-11-02 19:56:32,322 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-02 19:56:32,323 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-02 19:56:32,323 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-02 19:56:32,323 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-02 19:56:32,324 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 07:56:32" (1/1) ... [2024-11-02 19:56:32,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-02 19:56:32,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-02 19:56:32,362 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-02 19:56:32,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-02 19:56:32,393 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-02 19:56:32,393 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-11-02 19:56:32,393 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2024-11-02 19:56:32,394 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2024-11-02 19:56:32,394 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-02 19:56:32,395 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-02 19:56:32,395 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2024-11-02 19:56:32,395 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2024-11-02 19:56:32,395 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-02 19:56:32,396 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-02 19:56:32,474 INFO L238 CfgBuilder]: Building ICFG [2024-11-02 19:56:32,476 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-02 19:56:32,764 INFO L? ?]: Removed 34 outVars from TransFormulas that were not future-live. [2024-11-02 19:56:32,764 INFO L287 CfgBuilder]: Performing block encoding [2024-11-02 19:56:32,785 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-02 19:56:32,786 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-02 19:56:32,786 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 07:56:32 BoogieIcfgContainer [2024-11-02 19:56:32,786 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-02 19:56:32,792 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-02 19:56:32,792 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-02 19:56:32,795 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-02 19:56:32,796 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 07:56:31" (1/3) ... [2024-11-02 19:56:32,797 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50d869c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 07:56:32, skipping insertion in model container [2024-11-02 19:56:32,797 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 07:56:32" (2/3) ... [2024-11-02 19:56:32,797 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50d869c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 07:56:32, skipping insertion in model container [2024-11-02 19:56:32,798 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 07:56:32" (3/3) ... [2024-11-02 19:56:32,800 INFO L112 eAbstractionObserver]: Analyzing ICFG soft_float_4-3a.c.cil.c [2024-11-02 19:56:32,817 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-02 19:56:32,817 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-02 19:56:32,869 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-02 19:56:32,875 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;@202c5af6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-02 19:56:32,875 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-02 19:56:32,879 INFO L276 IsEmpty]: Start isEmpty. Operand has 54 states, 40 states have (on average 1.475) internal successors, (59), 41 states have internal predecessors, (59), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-02 19:56:32,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-02 19:56:32,886 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 19:56:32,887 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 19:56:32,887 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 19:56:32,891 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 19:56:32,892 INFO L85 PathProgramCache]: Analyzing trace with hash 173410466, now seen corresponding path program 1 times [2024-11-02 19:56:32,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-02 19:56:32,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [447353325] [2024-11-02 19:56:32,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 19:56:32,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 19:56:33,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 19:56:33,113 INFO L255 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-02 19:56:33,121 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 19:56:33,268 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-02 19:56:33,268 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 19:56:33,353 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-02 19:56:33,354 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-02 19:56:33,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [447353325] [2024-11-02 19:56:33,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [447353325] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 19:56:33,355 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-02 19:56:33,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2024-11-02 19:56:33,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656893431] [2024-11-02 19:56:33,358 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-02 19:56:33,363 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-02 19:56:33,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-02 19:56:33,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-02 19:56:33,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-11-02 19:56:33,384 INFO L87 Difference]: Start difference. First operand has 54 states, 40 states have (on average 1.475) internal successors, (59), 41 states have internal predecessors, (59), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-02 19:56:33,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 19:56:33,536 INFO L93 Difference]: Finished difference Result 128 states and 197 transitions. [2024-11-02 19:56:33,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-02 19:56:33,538 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2024-11-02 19:56:33,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 19:56:33,548 INFO L225 Difference]: With dead ends: 128 [2024-11-02 19:56:33,548 INFO L226 Difference]: Without dead ends: 71 [2024-11-02 19:56:33,552 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-11-02 19:56:33,555 INFO L432 NwaCegarLoop]: 65 mSDtfsCounter, 15 mSDsluCounter, 445 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 510 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 19:56:33,556 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 510 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 19:56:33,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-11-02 19:56:33,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 63. [2024-11-02 19:56:33,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 46 states have (on average 1.326086956521739) internal successors, (61), 48 states have internal predecessors, (61), 11 states have call successors, (11), 4 states have call predecessors, (11), 5 states have return successors, (14), 10 states have call predecessors, (14), 10 states have call successors, (14) [2024-11-02 19:56:33,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 86 transitions. [2024-11-02 19:56:33,607 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 86 transitions. Word has length 31 [2024-11-02 19:56:33,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 19:56:33,608 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 86 transitions. [2024-11-02 19:56:33,608 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-02 19:56:33,608 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 86 transitions. [2024-11-02 19:56:33,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-02 19:56:33,612 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 19:56:33,612 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 19:56:33,613 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-02 19:56:33,613 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 19:56:33,613 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 19:56:33,614 INFO L85 PathProgramCache]: Analyzing trace with hash -843557043, now seen corresponding path program 1 times [2024-11-02 19:56:33,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-02 19:56:33,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1923244346] [2024-11-02 19:56:33,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 19:56:33,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 19:56:33,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 19:56:33,866 INFO L255 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-02 19:56:33,870 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 19:56:33,979 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-02 19:56:33,982 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 19:56:34,046 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-02 19:56:34,046 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-02 19:56:34,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1923244346] [2024-11-02 19:56:34,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1923244346] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-02 19:56:34,047 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-02 19:56:34,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 9 [2024-11-02 19:56:34,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931262183] [2024-11-02 19:56:34,047 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-02 19:56:34,049 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-02 19:56:34,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-02 19:56:34,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-02 19:56:34,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2024-11-02 19:56:34,050 INFO L87 Difference]: Start difference. First operand 63 states and 86 transitions. Second operand has 9 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-02 19:56:34,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 19:56:34,169 INFO L93 Difference]: Finished difference Result 118 states and 157 transitions. [2024-11-02 19:56:34,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-02 19:56:34,172 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 35 [2024-11-02 19:56:34,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 19:56:34,174 INFO L225 Difference]: With dead ends: 118 [2024-11-02 19:56:34,174 INFO L226 Difference]: Without dead ends: 86 [2024-11-02 19:56:34,174 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-11-02 19:56:34,177 INFO L432 NwaCegarLoop]: 61 mSDtfsCounter, 13 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 478 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 19:56:34,177 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 478 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 19:56:34,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2024-11-02 19:56:34,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 71. [2024-11-02 19:56:34,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 52 states have (on average 1.2884615384615385) internal successors, (67), 54 states have internal predecessors, (67), 12 states have call successors, (12), 5 states have call predecessors, (12), 6 states have return successors, (15), 11 states have call predecessors, (15), 11 states have call successors, (15) [2024-11-02 19:56:34,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 94 transitions. [2024-11-02 19:56:34,199 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 94 transitions. Word has length 35 [2024-11-02 19:56:34,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 19:56:34,200 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 94 transitions. [2024-11-02 19:56:34,200 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-02 19:56:34,200 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 94 transitions. [2024-11-02 19:56:34,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-02 19:56:34,203 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 19:56:34,203 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 19:56:34,204 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-02 19:56:34,204 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 19:56:34,204 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 19:56:34,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1508244029, now seen corresponding path program 1 times [2024-11-02 19:56:34,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-02 19:56:34,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [345668752] [2024-11-02 19:56:34,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 19:56:34,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 19:56:34,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 19:56:34,286 INFO L255 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-02 19:56:34,291 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 19:56:34,375 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-02 19:56:34,375 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 19:56:34,435 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-02 19:56:34,435 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-02 19:56:34,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [345668752] [2024-11-02 19:56:34,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [345668752] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-02 19:56:34,436 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-02 19:56:34,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [] total 9 [2024-11-02 19:56:34,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722324434] [2024-11-02 19:56:34,436 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-02 19:56:34,437 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-02 19:56:34,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-02 19:56:34,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-02 19:56:34,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-11-02 19:56:34,438 INFO L87 Difference]: Start difference. First operand 71 states and 94 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-02 19:56:34,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 19:56:34,555 INFO L93 Difference]: Finished difference Result 108 states and 143 transitions. [2024-11-02 19:56:34,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-02 19:56:34,556 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 39 [2024-11-02 19:56:34,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 19:56:34,557 INFO L225 Difference]: With dead ends: 108 [2024-11-02 19:56:34,557 INFO L226 Difference]: Without dead ends: 85 [2024-11-02 19:56:34,558 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-11-02 19:56:34,559 INFO L432 NwaCegarLoop]: 66 mSDtfsCounter, 13 mSDsluCounter, 443 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 19:56:34,561 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 509 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 19:56:34,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2024-11-02 19:56:34,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 79. [2024-11-02 19:56:34,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 58 states have (on average 1.2758620689655173) internal successors, (74), 60 states have internal predecessors, (74), 13 states have call successors, (13), 6 states have call predecessors, (13), 7 states have return successors, (16), 12 states have call predecessors, (16), 12 states have call successors, (16) [2024-11-02 19:56:34,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 103 transitions. [2024-11-02 19:56:34,573 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 103 transitions. Word has length 39 [2024-11-02 19:56:34,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 19:56:34,574 INFO L471 AbstractCegarLoop]: Abstraction has 79 states and 103 transitions. [2024-11-02 19:56:34,574 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-02 19:56:34,574 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 103 transitions. [2024-11-02 19:56:34,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-02 19:56:34,575 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 19:56:34,575 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 19:56:34,576 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-02 19:56:34,576 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 19:56:34,576 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 19:56:34,576 INFO L85 PathProgramCache]: Analyzing trace with hash -54729342, now seen corresponding path program 2 times [2024-11-02 19:56:34,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-02 19:56:34,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1783606229] [2024-11-02 19:56:34,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 19:56:34,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 19:56:37,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 19:56:37,287 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-02 19:56:37,292 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 19:56:37,452 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-02 19:56:37,453 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 19:56:37,574 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-02 19:56:37,575 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-02 19:56:37,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1783606229] [2024-11-02 19:56:37,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1783606229] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-02 19:56:37,575 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-02 19:56:37,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2024-11-02 19:56:37,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873367791] [2024-11-02 19:56:37,576 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-02 19:56:37,576 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-02 19:56:37,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-02 19:56:37,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-02 19:56:37,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-11-02 19:56:37,578 INFO L87 Difference]: Start difference. First operand 79 states and 103 transitions. Second operand has 10 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-02 19:56:39,261 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.63s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-02 19:56:39,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 19:56:39,328 INFO L93 Difference]: Finished difference Result 90 states and 115 transitions. [2024-11-02 19:56:39,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-02 19:56:39,329 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 39 [2024-11-02 19:56:39,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 19:56:39,331 INFO L225 Difference]: With dead ends: 90 [2024-11-02 19:56:39,331 INFO L226 Difference]: Without dead ends: 88 [2024-11-02 19:56:39,331 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 66 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-11-02 19:56:39,332 INFO L432 NwaCegarLoop]: 65 mSDtfsCounter, 3 mSDsluCounter, 425 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 490 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-11-02 19:56:39,333 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 490 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 72 Invalid, 1 Unknown, 0 Unchecked, 1.7s Time] [2024-11-02 19:56:39,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2024-11-02 19:56:39,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 83. [2024-11-02 19:56:39,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 61 states have (on average 1.2622950819672132) internal successors, (77), 63 states have internal predecessors, (77), 13 states have call successors, (13), 7 states have call predecessors, (13), 8 states have return successors, (16), 12 states have call predecessors, (16), 12 states have call successors, (16) [2024-11-02 19:56:39,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 106 transitions. [2024-11-02 19:56:39,349 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 106 transitions. Word has length 39 [2024-11-02 19:56:39,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 19:56:39,349 INFO L471 AbstractCegarLoop]: Abstraction has 83 states and 106 transitions. [2024-11-02 19:56:39,349 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-02 19:56:39,349 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 106 transitions. [2024-11-02 19:56:39,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-02 19:56:39,351 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 19:56:39,351 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 19:56:39,351 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-02 19:56:39,351 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 19:56:39,352 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 19:56:39,352 INFO L85 PathProgramCache]: Analyzing trace with hash 1136903568, now seen corresponding path program 1 times [2024-11-02 19:56:39,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-02 19:56:39,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [871523927] [2024-11-02 19:56:39,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 19:56:39,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 19:56:39,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 19:56:39,378 INFO L255 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-02 19:56:39,380 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 19:56:39,445 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-02 19:56:39,445 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 19:56:39,549 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-02 19:56:39,550 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-02 19:56:39,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [871523927] [2024-11-02 19:56:39,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [871523927] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 19:56:39,550 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-02 19:56:39,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2024-11-02 19:56:39,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121232467] [2024-11-02 19:56:39,551 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-02 19:56:39,551 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-02 19:56:39,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-02 19:56:39,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-02 19:56:39,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-11-02 19:56:39,554 INFO L87 Difference]: Start difference. First operand 83 states and 106 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-02 19:56:39,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 19:56:39,639 INFO L93 Difference]: Finished difference Result 117 states and 150 transitions. [2024-11-02 19:56:39,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-02 19:56:39,640 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 44 [2024-11-02 19:56:39,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 19:56:39,642 INFO L225 Difference]: With dead ends: 117 [2024-11-02 19:56:39,642 INFO L226 Difference]: Without dead ends: 106 [2024-11-02 19:56:39,642 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-11-02 19:56:39,643 INFO L432 NwaCegarLoop]: 66 mSDtfsCounter, 18 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 19:56:39,647 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 427 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 19:56:39,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2024-11-02 19:56:39,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 97. [2024-11-02 19:56:39,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 70 states have (on average 1.2428571428571429) internal successors, (87), 74 states have internal predecessors, (87), 16 states have call successors, (16), 7 states have call predecessors, (16), 10 states have return successors, (22), 15 states have call predecessors, (22), 15 states have call successors, (22) [2024-11-02 19:56:39,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 125 transitions. [2024-11-02 19:56:39,665 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 125 transitions. Word has length 44 [2024-11-02 19:56:39,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 19:56:39,666 INFO L471 AbstractCegarLoop]: Abstraction has 97 states and 125 transitions. [2024-11-02 19:56:39,666 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-02 19:56:39,666 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 125 transitions. [2024-11-02 19:56:39,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-02 19:56:39,668 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 19:56:39,668 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 19:56:39,668 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-02 19:56:39,668 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 19:56:39,669 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 19:56:39,669 INFO L85 PathProgramCache]: Analyzing trace with hash 1837968146, now seen corresponding path program 1 times [2024-11-02 19:56:39,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-02 19:56:39,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [291662854] [2024-11-02 19:56:39,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 19:56:39,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 19:56:39,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 19:56:39,704 INFO L255 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-02 19:56:39,706 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 19:56:39,807 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-02 19:56:39,807 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 19:56:40,022 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-02 19:56:40,022 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-02 19:56:40,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [291662854] [2024-11-02 19:56:40,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [291662854] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-02 19:56:40,023 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-02 19:56:40,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11, 12] imperfect sequences [] total 17 [2024-11-02 19:56:40,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919443168] [2024-11-02 19:56:40,023 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-02 19:56:40,024 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-02 19:56:40,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-02 19:56:40,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-02 19:56:40,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2024-11-02 19:56:40,025 INFO L87 Difference]: Start difference. First operand 97 states and 125 transitions. Second operand has 17 states, 16 states have (on average 2.25) internal successors, (36), 14 states have internal predecessors, (36), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-02 19:56:40,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 19:56:40,341 INFO L93 Difference]: Finished difference Result 131 states and 170 transitions. [2024-11-02 19:56:40,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-02 19:56:40,343 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.25) internal successors, (36), 14 states have internal predecessors, (36), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 44 [2024-11-02 19:56:40,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 19:56:40,344 INFO L225 Difference]: With dead ends: 131 [2024-11-02 19:56:40,344 INFO L226 Difference]: Without dead ends: 124 [2024-11-02 19:56:40,345 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2024-11-02 19:56:40,346 INFO L432 NwaCegarLoop]: 73 mSDtfsCounter, 40 mSDsluCounter, 805 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 878 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-02 19:56:40,350 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 878 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-02 19:56:40,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2024-11-02 19:56:40,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 99. [2024-11-02 19:56:40,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 72 states have (on average 1.2361111111111112) internal successors, (89), 75 states have internal predecessors, (89), 16 states have call successors, (16), 7 states have call predecessors, (16), 10 states have return successors, (22), 16 states have call predecessors, (22), 15 states have call successors, (22) [2024-11-02 19:56:40,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 127 transitions. [2024-11-02 19:56:40,370 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 127 transitions. Word has length 44 [2024-11-02 19:56:40,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 19:56:40,371 INFO L471 AbstractCegarLoop]: Abstraction has 99 states and 127 transitions. [2024-11-02 19:56:40,371 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.25) internal successors, (36), 14 states have internal predecessors, (36), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-02 19:56:40,371 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 127 transitions. [2024-11-02 19:56:40,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-02 19:56:40,375 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 19:56:40,375 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 19:56:40,376 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-02 19:56:40,376 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 19:56:40,376 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 19:56:40,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1849173563, now seen corresponding path program 1 times [2024-11-02 19:56:40,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-02 19:56:40,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [683773955] [2024-11-02 19:56:40,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 19:56:40,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms