/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/byte_add_1-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.5-dev-b75d321-m [2024-11-02 19:54:37,918 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-02 19:54:37,986 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 19:54:37,991 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-02 19:54:37,992 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-02 19:54:38,012 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-02 19:54:38,012 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-02 19:54:38,013 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-02 19:54:38,013 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-02 19:54:38,013 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-02 19:54:38,014 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-02 19:54:38,014 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-02 19:54:38,014 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-02 19:54:38,015 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-02 19:54:38,015 INFO L153 SettingsManager]: * Use SBE=true [2024-11-02 19:54:38,015 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-02 19:54:38,016 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-02 19:54:38,018 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-02 19:54:38,018 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-02 19:54:38,019 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-02 19:54:38,019 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-02 19:54:38,019 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-02 19:54:38,020 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-02 19:54:38,020 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-02 19:54:38,020 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-11-02 19:54:38,020 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-02 19:54:38,021 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-11-02 19:54:38,021 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-02 19:54:38,021 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-02 19:54:38,021 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-02 19:54:38,022 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-02 19:54:38,022 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-02 19:54:38,022 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-02 19:54:38,023 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-02 19:54:38,023 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-02 19:54:38,023 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-02 19:54:38,023 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-02 19:54:38,024 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-02 19:54:38,024 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2024-11-02 19:54:38,024 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-11-02 19:54:38,024 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-02 19:54:38,025 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-02 19:54:38,025 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-02 19:54:38,025 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-02 19:54:38,025 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Allow undefined functions -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol [2024-11-02 19:54:38,246 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-02 19:54:38,269 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-02 19:54:38,272 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-02 19:54:38,273 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-02 19:54:38,274 INFO L274 PluginConnector]: CDTParser initialized [2024-11-02 19:54:38,275 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/byte_add_1-1.i [2024-11-02 19:54:39,690 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-02 19:54:39,850 INFO L384 CDTParser]: Found 1 translation units. [2024-11-02 19:54:39,850 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/bitvector/byte_add_1-1.i [2024-11-02 19:54:39,857 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7bb8b151b/c49473d83c334368b608a7927c0a9a20/FLAG266257109 [2024-11-02 19:54:39,871 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7bb8b151b/c49473d83c334368b608a7927c0a9a20 [2024-11-02 19:54:39,873 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-02 19:54:39,874 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-11-02 19:54:39,875 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-02 19:54:39,875 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-02 19:54:39,882 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-02 19:54:39,883 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 07:54:39" (1/1) ... [2024-11-02 19:54:39,884 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4dc09b77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 07:54:39, skipping insertion in model container [2024-11-02 19:54:39,884 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 07:54:39" (1/1) ... [2024-11-02 19:54:39,913 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-02 19:54:40,088 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/byte_add_1-1.i[1168,1181] [2024-11-02 19:54:40,147 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 19:54:40,157 INFO L200 MainTranslator]: Completed pre-run [2024-11-02 19:54:40,168 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/byte_add_1-1.i[1168,1181] [2024-11-02 19:54:40,192 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 19:54:40,206 INFO L204 MainTranslator]: Completed translation [2024-11-02 19:54:40,207 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 07:54:40 WrapperNode [2024-11-02 19:54:40,207 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-02 19:54:40,208 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-02 19:54:40,208 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-02 19:54:40,208 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-02 19:54:40,215 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 07:54:40" (1/1) ... [2024-11-02 19:54:40,224 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 07:54:40" (1/1) ... [2024-11-02 19:54:40,244 INFO L138 Inliner]: procedures = 16, calls = 8, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 123 [2024-11-02 19:54:40,244 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-02 19:54:40,249 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-02 19:54:40,249 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-02 19:54:40,249 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-02 19:54:40,258 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 07:54:40" (1/1) ... [2024-11-02 19:54:40,258 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 07:54:40" (1/1) ... [2024-11-02 19:54:40,268 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 07:54:40" (1/1) ... [2024-11-02 19:54:40,281 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 19:54:40,281 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 07:54:40" (1/1) ... [2024-11-02 19:54:40,282 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 07:54:40" (1/1) ... [2024-11-02 19:54:40,287 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 07:54:40" (1/1) ... [2024-11-02 19:54:40,292 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 07:54:40" (1/1) ... [2024-11-02 19:54:40,294 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 07:54:40" (1/1) ... [2024-11-02 19:54:40,295 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 07:54:40" (1/1) ... [2024-11-02 19:54:40,297 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-02 19:54:40,298 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-02 19:54:40,298 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-02 19:54:40,299 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-02 19:54:40,299 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 07:54:40" (1/1) ... [2024-11-02 19:54:40,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-02 19:54:40,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-02 19:54:40,349 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 19:54:40,352 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 19:54:40,380 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-02 19:54:40,381 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-11-02 19:54:40,381 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-02 19:54:40,381 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-02 19:54:40,455 INFO L238 CfgBuilder]: Building ICFG [2024-11-02 19:54:40,458 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-02 19:54:40,785 INFO L? ?]: Removed 23 outVars from TransFormulas that were not future-live. [2024-11-02 19:54:40,786 INFO L287 CfgBuilder]: Performing block encoding [2024-11-02 19:54:40,800 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-02 19:54:40,800 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-02 19:54:40,801 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 07:54:40 BoogieIcfgContainer [2024-11-02 19:54:40,801 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-02 19:54:40,803 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-02 19:54:40,803 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-02 19:54:40,807 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-02 19:54:40,808 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 07:54:39" (1/3) ... [2024-11-02 19:54:40,809 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75146d8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 07:54:40, skipping insertion in model container [2024-11-02 19:54:40,809 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 07:54:40" (2/3) ... [2024-11-02 19:54:40,809 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75146d8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 07:54:40, skipping insertion in model container [2024-11-02 19:54:40,809 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 07:54:40" (3/3) ... [2024-11-02 19:54:40,811 INFO L112 eAbstractionObserver]: Analyzing ICFG byte_add_1-1.i [2024-11-02 19:54:40,827 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-02 19:54:40,827 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-02 19:54:40,888 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-02 19:54:40,894 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;@45690bdf, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-02 19:54:40,894 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-02 19:54:40,898 INFO L276 IsEmpty]: Start isEmpty. Operand has 42 states, 40 states have (on average 1.775) internal successors, (71), 41 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 19:54:40,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-02 19:54:40,905 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 19:54:40,906 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 19:54:40,906 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 19:54:40,912 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 19:54:40,912 INFO L85 PathProgramCache]: Analyzing trace with hash 255061167, now seen corresponding path program 1 times [2024-11-02 19:54:40,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-02 19:54:40,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [155845221] [2024-11-02 19:54:40,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 19:54:40,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 19:54:41,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 19:54:41,107 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 1 conjuncts are in the unsatisfiable core [2024-11-02 19:54:41,112 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 19:54:41,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 19:54:41,130 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 19:54:41,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 19:54:41,137 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-02 19:54:41,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [155845221] [2024-11-02 19:54:41,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [155845221] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-02 19:54:41,138 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-02 19:54:41,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2024-11-02 19:54:41,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98551764] [2024-11-02 19:54:41,141 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-02 19:54:41,146 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-02 19:54:41,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-02 19:54:41,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-02 19:54:41,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-02 19:54:41,169 INFO L87 Difference]: Start difference. First operand has 42 states, 40 states have (on average 1.775) internal successors, (71), 41 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 19:54:41,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 19:54:41,187 INFO L93 Difference]: Finished difference Result 57 states and 92 transitions. [2024-11-02 19:54:41,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-02 19:54:41,189 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2024-11-02 19:54:41,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 19:54:41,196 INFO L225 Difference]: With dead ends: 57 [2024-11-02 19:54:41,197 INFO L226 Difference]: Without dead ends: 38 [2024-11-02 19:54:41,200 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-02 19:54:41,204 INFO L432 NwaCegarLoop]: 68 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-02 19:54:41,205 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-02 19:54:41,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2024-11-02 19:54:41,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2024-11-02 19:54:41,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.7297297297297298) internal successors, (64), 37 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 19:54:41,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 64 transitions. [2024-11-02 19:54:41,238 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 64 transitions. Word has length 12 [2024-11-02 19:54:41,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 19:54:41,239 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 64 transitions. [2024-11-02 19:54:41,240 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 19:54:41,240 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 64 transitions. [2024-11-02 19:54:41,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-02 19:54:41,241 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 19:54:41,242 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 19:54:41,242 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-02 19:54:41,242 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 19:54:41,243 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 19:54:41,243 INFO L85 PathProgramCache]: Analyzing trace with hash 1803477009, now seen corresponding path program 1 times [2024-11-02 19:54:41,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-02 19:54:41,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [167683215] [2024-11-02 19:54:41,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 19:54:41,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 19:54:41,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 19:54:41,725 INFO L255 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-02 19:54:41,731 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 19:54:41,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 19:54:41,784 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 19:54:41,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 19:54:41,821 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-02 19:54:41,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [167683215] [2024-11-02 19:54:41,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [167683215] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-02 19:54:41,822 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-02 19:54:41,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2024-11-02 19:54:41,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628330116] [2024-11-02 19:54:41,822 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-02 19:54:41,824 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-02 19:54:41,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-02 19:54:41,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-02 19:54:41,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-02 19:54:41,828 INFO L87 Difference]: Start difference. First operand 38 states and 64 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 19:54:42,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 19:54:42,076 INFO L93 Difference]: Finished difference Result 107 states and 191 transitions. [2024-11-02 19:54:42,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-02 19:54:42,077 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2024-11-02 19:54:42,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 19:54:42,078 INFO L225 Difference]: With dead ends: 107 [2024-11-02 19:54:42,079 INFO L226 Difference]: Without dead ends: 79 [2024-11-02 19:54:42,079 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-02 19:54:42,081 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 60 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-02 19:54:42,081 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 61 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-02 19:54:42,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2024-11-02 19:54:42,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 63. [2024-11-02 19:54:42,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.5161290322580645) internal successors, (94), 62 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 19:54:42,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 94 transitions. [2024-11-02 19:54:42,090 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 94 transitions. Word has length 12 [2024-11-02 19:54:42,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 19:54:42,091 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 94 transitions. [2024-11-02 19:54:42,091 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 19:54:42,091 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 94 transitions. [2024-11-02 19:54:42,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-02 19:54:42,092 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 19:54:42,092 INFO L215 NwaCegarLoop]: trace histogram [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 19:54:42,092 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-02 19:54:42,092 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 19:54:42,093 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 19:54:42,093 INFO L85 PathProgramCache]: Analyzing trace with hash -235076041, now seen corresponding path program 1 times [2024-11-02 19:54:42,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-02 19:54:42,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [46226258] [2024-11-02 19:54:42,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 19:54:42,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 19:54:42,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 19:54:42,319 INFO L255 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-02 19:54:42,321 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 19:54:42,352 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-02 19:54:42,352 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 19:54:42,369 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-02 19:54:42,370 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-02 19:54:42,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [46226258] [2024-11-02 19:54:42,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [46226258] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-02 19:54:42,370 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-02 19:54:42,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 3] imperfect sequences [] total 5 [2024-11-02 19:54:42,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519540392] [2024-11-02 19:54:42,371 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-02 19:54:42,374 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-02 19:54:42,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-02 19:54:42,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-02 19:54:42,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-02 19:54:42,375 INFO L87 Difference]: Start difference. First operand 63 states and 94 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 19:54:42,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 19:54:42,626 INFO L93 Difference]: Finished difference Result 150 states and 239 transitions. [2024-11-02 19:54:42,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-02 19:54:42,626 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2024-11-02 19:54:42,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 19:54:42,628 INFO L225 Difference]: With dead ends: 150 [2024-11-02 19:54:42,628 INFO L226 Difference]: Without dead ends: 102 [2024-11-02 19:54:42,628 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2024-11-02 19:54:42,629 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 91 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-02 19:54:42,630 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 70 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-02 19:54:42,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2024-11-02 19:54:42,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 98. [2024-11-02 19:54:42,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 1.4639175257731958) internal successors, (142), 97 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 19:54:42,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 142 transitions. [2024-11-02 19:54:42,647 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 142 transitions. Word has length 24 [2024-11-02 19:54:42,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 19:54:42,648 INFO L471 AbstractCegarLoop]: Abstraction has 98 states and 142 transitions. [2024-11-02 19:54:42,648 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 19:54:42,648 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 142 transitions. [2024-11-02 19:54:42,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-02 19:54:42,649 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 19:54:42,651 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 19:54:42,651 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-02 19:54:42,651 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 19:54:42,652 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 19:54:42,653 INFO L85 PathProgramCache]: Analyzing trace with hash 730584695, now seen corresponding path program 1 times [2024-11-02 19:54:42,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-02 19:54:42,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [466484695] [2024-11-02 19:54:42,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 19:54:42,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 19:54:42,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 19:54:42,860 INFO L255 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-02 19:54:42,863 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 19:54:42,895 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-02 19:54:42,896 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 19:54:42,945 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-02 19:54:42,945 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-02 19:54:42,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [466484695] [2024-11-02 19:54:42,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [466484695] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-02 19:54:42,946 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-02 19:54:42,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 5] imperfect sequences [] total 7 [2024-11-02 19:54:42,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947666363] [2024-11-02 19:54:42,946 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-02 19:54:42,946 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-02 19:54:42,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-02 19:54:42,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-02 19:54:42,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-11-02 19:54:42,948 INFO L87 Difference]: Start difference. First operand 98 states and 142 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 19:54:43,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 19:54:43,284 INFO L93 Difference]: Finished difference Result 351 states and 521 transitions. [2024-11-02 19:54:43,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-02 19:54:43,285 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2024-11-02 19:54:43,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 19:54:43,287 INFO L225 Difference]: With dead ends: 351 [2024-11-02 19:54:43,287 INFO L226 Difference]: Without dead ends: 260 [2024-11-02 19:54:43,288 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2024-11-02 19:54:43,292 INFO L432 NwaCegarLoop]: 68 mSDtfsCounter, 205 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-02 19:54:43,292 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 156 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-02 19:54:43,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2024-11-02 19:54:43,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 182. [2024-11-02 19:54:43,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 1.4364640883977902) internal successors, (260), 181 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 19:54:43,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 260 transitions. [2024-11-02 19:54:43,319 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 260 transitions. Word has length 24 [2024-11-02 19:54:43,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 19:54:43,319 INFO L471 AbstractCegarLoop]: Abstraction has 182 states and 260 transitions. [2024-11-02 19:54:43,319 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 19:54:43,319 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 260 transitions. [2024-11-02 19:54:43,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-02 19:54:43,322 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 19:54:43,323 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 19:54:43,323 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-02 19:54:43,323 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 19:54:43,323 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 19:54:43,324 INFO L85 PathProgramCache]: Analyzing trace with hash 1578156322, now seen corresponding path program 1 times [2024-11-02 19:54:43,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-02 19:54:43,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [660953881] [2024-11-02 19:54:43,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 19:54:43,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 19:54:43,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 19:54:43,505 INFO L255 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-02 19:54:43,507 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 19:54:43,527 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-02 19:54:43,527 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 19:54:43,557 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-02 19:54:43,558 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-02 19:54:43,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [660953881] [2024-11-02 19:54:43,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [660953881] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-02 19:54:43,558 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-02 19:54:43,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 5] imperfect sequences [] total 7 [2024-11-02 19:54:43,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400473606] [2024-11-02 19:54:43,559 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-02 19:54:43,559 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-02 19:54:43,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-02 19:54:43,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-02 19:54:43,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-11-02 19:54:43,560 INFO L87 Difference]: Start difference. First operand 182 states and 260 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 19:54:43,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 19:54:43,838 INFO L93 Difference]: Finished difference Result 658 states and 945 transitions. [2024-11-02 19:54:43,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-02 19:54:43,839 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2024-11-02 19:54:43,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 19:54:43,841 INFO L225 Difference]: With dead ends: 658 [2024-11-02 19:54:43,841 INFO L226 Difference]: Without dead ends: 492 [2024-11-02 19:54:43,842 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2024-11-02 19:54:43,842 INFO L432 NwaCegarLoop]: 62 mSDtfsCounter, 158 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-02 19:54:43,843 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 191 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-02 19:54:43,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2024-11-02 19:54:43,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 430. [2024-11-02 19:54:43,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 429 states have (on average 1.4195804195804196) internal successors, (609), 429 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 19:54:43,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 609 transitions. [2024-11-02 19:54:43,868 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 609 transitions. Word has length 26 [2024-11-02 19:54:43,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 19:54:43,872 INFO L471 AbstractCegarLoop]: Abstraction has 430 states and 609 transitions. [2024-11-02 19:54:43,872 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 19:54:43,872 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 609 transitions. [2024-11-02 19:54:43,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-02 19:54:43,873 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 19:54:43,874 INFO L215 NwaCegarLoop]: trace histogram [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 19:54:43,874 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-02 19:54:43,874 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 19:54:43,874 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 19:54:43,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1110801003, now seen corresponding path program 1 times [2024-11-02 19:54:43,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-02 19:54:43,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1379305346] [2024-11-02 19:54:43,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 19:54:43,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 19:54:44,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 19:54:44,086 INFO L255 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-02 19:54:44,087 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 19:54:44,136 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-02 19:54:44,136 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 19:54:44,233 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-02 19:54:44,234 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-02 19:54:44,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1379305346] [2024-11-02 19:54:44,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1379305346] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-02 19:54:44,234 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-02 19:54:44,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 8] imperfect sequences [] total 13 [2024-11-02 19:54:44,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349291920] [2024-11-02 19:54:44,235 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-02 19:54:44,235 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-02 19:54:44,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-02 19:54:44,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-02 19:54:44,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2024-11-02 19:54:44,236 INFO L87 Difference]: Start difference. First operand 430 states and 609 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 19:54:44,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 19:54:44,814 INFO L93 Difference]: Finished difference Result 1019 states and 1467 transitions. [2024-11-02 19:54:44,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-02 19:54:44,814 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2024-11-02 19:54:44,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 19:54:44,818 INFO L225 Difference]: With dead ends: 1019 [2024-11-02 19:54:44,819 INFO L226 Difference]: Without dead ends: 812 [2024-11-02 19:54:44,820 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2024-11-02 19:54:44,820 INFO L432 NwaCegarLoop]: 111 mSDtfsCounter, 440 mSDsluCounter, 435 mSDsCounter, 0 mSdLazyCounter, 634 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 440 SdHoareTripleChecker+Valid, 546 SdHoareTripleChecker+Invalid, 667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-02 19:54:44,821 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [440 Valid, 546 Invalid, 667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 634 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-02 19:54:44,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2024-11-02 19:54:44,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 780. [2024-11-02 19:54:44,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 780 states, 779 states have (on average 1.4094993581514763) internal successors, (1098), 779 states have internal predecessors, (1098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 19:54:44,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 1098 transitions. [2024-11-02 19:54:44,859 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 1098 transitions. Word has length 28 [2024-11-02 19:54:44,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 19:54:44,859 INFO L471 AbstractCegarLoop]: Abstraction has 780 states and 1098 transitions. [2024-11-02 19:54:44,859 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 19:54:44,860 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 1098 transitions. [2024-11-02 19:54:44,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-02 19:54:44,863 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 19:54:44,863 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 19:54:44,863 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-02 19:54:44,863 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 19:54:44,864 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 19:54:44,864 INFO L85 PathProgramCache]: Analyzing trace with hash -2082362030, now seen corresponding path program 1 times [2024-11-02 19:54:44,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-02 19:54:44,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1325995987] [2024-11-02 19:54:44,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 19:54:44,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 19:54:44,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 19:54:44,966 INFO L255 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-02 19:54:44,969 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 19:54:44,992 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-02 19:54:44,992 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 19:54:45,011 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-02 19:54:45,012 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-02 19:54:45,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1325995987] [2024-11-02 19:54:45,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1325995987] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-02 19:54:45,012 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-02 19:54:45,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2024-11-02 19:54:45,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006869964] [2024-11-02 19:54:45,012 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-02 19:54:45,013 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-02 19:54:45,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-02 19:54:45,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-02 19:54:45,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-02 19:54:45,015 INFO L87 Difference]: Start difference. First operand 780 states and 1098 transitions. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 19:54:45,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 19:54:45,050 INFO L93 Difference]: Finished difference Result 1099 states and 1513 transitions. [2024-11-02 19:54:45,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 19:54:45,051 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2024-11-02 19:54:45,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 19:54:45,055 INFO L225 Difference]: With dead ends: 1099 [2024-11-02 19:54:45,055 INFO L226 Difference]: Without dead ends: 1077 [2024-11-02 19:54:45,055 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-02 19:54:45,056 INFO L432 NwaCegarLoop]: 64 mSDtfsCounter, 8 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 122 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 [2024-11-02 19:54:45,057 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 122 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-02 19:54:45,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1077 states. [2024-11-02 19:54:45,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1077 to 991. [2024-11-02 19:54:45,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 991 states, 990 states have (on average 1.3838383838383839) internal successors, (1370), 990 states have internal predecessors, (1370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 19:54:45,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 991 states to 991 states and 1370 transitions. [2024-11-02 19:54:45,086 INFO L78 Accepts]: Start accepts. Automaton has 991 states and 1370 transitions. Word has length 34 [2024-11-02 19:54:45,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 19:54:45,086 INFO L471 AbstractCegarLoop]: Abstraction has 991 states and 1370 transitions. [2024-11-02 19:54:45,087 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 19:54:45,087 INFO L276 IsEmpty]: Start isEmpty. Operand 991 states and 1370 transitions. [2024-11-02 19:54:45,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-02 19:54:45,089 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 19:54:45,089 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 19:54:45,089 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-02 19:54:45,089 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 19:54:45,089 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 19:54:45,090 INFO L85 PathProgramCache]: Analyzing trace with hash 218460560, now seen corresponding path program 1 times [2024-11-02 19:54:45,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-02 19:54:45,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2047983948] [2024-11-02 19:54:45,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 19:54:45,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 19:54:45,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 19:54:45,243 INFO L255 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-02 19:54:45,245 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 19:54:45,404 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-02 19:54:45,405 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 19:54:45,602 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 19:54:45,603 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-02 19:54:45,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2047983948] [2024-11-02 19:54:45,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [2047983948] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-02 19:54:45,603 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-02 19:54:45,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 9] imperfect sequences [] total 15 [2024-11-02 19:54:45,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608764381] [2024-11-02 19:54:45,604 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-02 19:54:45,604 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-02 19:54:45,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-02 19:54:45,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-02 19:54:45,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2024-11-02 19:54:45,606 INFO L87 Difference]: Start difference. First operand 991 states and 1370 transitions. Second operand has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 15 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 19:54:46,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 19:54:46,927 INFO L93 Difference]: Finished difference Result 2442 states and 3378 transitions. [2024-11-02 19:54:46,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-11-02 19:54:46,927 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 15 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2024-11-02 19:54:46,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 19:54:46,933 INFO L225 Difference]: With dead ends: 2442 [2024-11-02 19:54:46,933 INFO L226 Difference]: Without dead ends: 1504 [2024-11-02 19:54:46,935 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=350, Invalid=642, Unknown=0, NotChecked=0, Total=992 [2024-11-02 19:54:46,936 INFO L432 NwaCegarLoop]: 63 mSDtfsCounter, 933 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 940 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 933 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 994 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 940 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-02 19:54:46,936 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [933 Valid, 322 Invalid, 994 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 940 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-02 19:54:46,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1504 states. [2024-11-02 19:54:46,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1504 to 1297. [2024-11-02 19:54:46,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1297 states, 1296 states have (on average 1.3209876543209877) internal successors, (1712), 1296 states have internal predecessors, (1712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 19:54:46,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1297 states to 1297 states and 1712 transitions. [2024-11-02 19:54:46,983 INFO L78 Accepts]: Start accepts. Automaton has 1297 states and 1712 transitions. Word has length 34 [2024-11-02 19:54:46,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 19:54:46,983 INFO L471 AbstractCegarLoop]: Abstraction has 1297 states and 1712 transitions. [2024-11-02 19:54:46,984 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 15 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 19:54:46,984 INFO L276 IsEmpty]: Start isEmpty. Operand 1297 states and 1712 transitions. [2024-11-02 19:54:46,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-02 19:54:46,986 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 19:54:46,986 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 19:54:46,986 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-02 19:54:46,987 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 19:54:46,987 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 19:54:46,987 INFO L85 PathProgramCache]: Analyzing trace with hash -1990369840, now seen corresponding path program 1 times [2024-11-02 19:54:46,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-02 19:54:46,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [770763039] [2024-11-02 19:54:46,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 19:54:46,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 19:54:47,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 19:54:47,013 INFO L255 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-02 19:54:47,015 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 19:54:47,027 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-02 19:54:47,027 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 19:54:47,034 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-02 19:54:47,034 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-02 19:54:47,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [770763039] [2024-11-02 19:54:47,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [770763039] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-02 19:54:47,034 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-02 19:54:47,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2024-11-02 19:54:47,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447913762] [2024-11-02 19:54:47,035 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-02 19:54:47,035 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-02 19:54:47,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-02 19:54:47,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-02 19:54:47,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-02 19:54:47,036 INFO L87 Difference]: Start difference. First operand 1297 states and 1712 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 19:54:47,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 19:54:47,201 INFO L93 Difference]: Finished difference Result 2783 states and 3665 transitions. [2024-11-02 19:54:47,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-02 19:54:47,203 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2024-11-02 19:54:47,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 19:54:47,209 INFO L225 Difference]: With dead ends: 2783 [2024-11-02 19:54:47,210 INFO L226 Difference]: Without dead ends: 1545 [2024-11-02 19:54:47,211 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-02 19:54:47,213 INFO L432 NwaCegarLoop]: 45 mSDtfsCounter, 35 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 19:54:47,214 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 83 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 19:54:47,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1545 states. [2024-11-02 19:54:47,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1545 to 1326. [2024-11-02 19:54:47,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1326 states, 1325 states have (on average 1.2883018867924527) internal successors, (1707), 1325 states have internal predecessors, (1707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 19:54:47,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1326 states to 1326 states and 1707 transitions. [2024-11-02 19:54:47,261 INFO L78 Accepts]: Start accepts. Automaton has 1326 states and 1707 transitions. Word has length 34 [2024-11-02 19:54:47,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 19:54:47,261 INFO L471 AbstractCegarLoop]: Abstraction has 1326 states and 1707 transitions. [2024-11-02 19:54:47,261 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 19:54:47,262 INFO L276 IsEmpty]: Start isEmpty. Operand 1326 states and 1707 transitions. [2024-11-02 19:54:47,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-02 19:54:47,264 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 19:54:47,264 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 19:54:47,265 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-02 19:54:47,265 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 19:54:47,265 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 19:54:47,265 INFO L85 PathProgramCache]: Analyzing trace with hash -215362478, now seen corresponding path program 1 times [2024-11-02 19:54:47,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-02 19:54:47,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1499683415] [2024-11-02 19:54:47,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 19:54:47,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 19:54:47,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 19:54:47,438 INFO L255 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-02 19:54:47,440 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 19:54:47,565 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-02 19:54:47,565 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 19:54:47,745 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 19:54:47,745 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-02 19:54:47,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1499683415] [2024-11-02 19:54:47,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1499683415] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-02 19:54:47,746 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-02 19:54:47,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 10] imperfect sequences [] total 17 [2024-11-02 19:54:47,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46683813] [2024-11-02 19:54:47,746 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-02 19:54:47,747 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-02 19:54:47,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-02 19:54:47,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-02 19:54:47,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2024-11-02 19:54:47,748 INFO L87 Difference]: Start difference. First operand 1326 states and 1707 transitions. Second operand has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 17 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 19:54:49,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 19:54:49,471 INFO L93 Difference]: Finished difference Result 3128 states and 4009 transitions. [2024-11-02 19:54:49,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-11-02 19:54:49,472 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 17 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2024-11-02 19:54:49,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 19:54:49,479 INFO L225 Difference]: With dead ends: 3128 [2024-11-02 19:54:49,479 INFO L226 Difference]: Without dead ends: 2155 [2024-11-02 19:54:49,481 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=529, Invalid=1031, Unknown=0, NotChecked=0, Total=1560 [2024-11-02 19:54:49,482 INFO L432 NwaCegarLoop]: 66 mSDtfsCounter, 1138 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 1264 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1138 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 1360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 1264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-02 19:54:49,482 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1138 Valid, 396 Invalid, 1360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 1264 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-02 19:54:49,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2155 states. [2024-11-02 19:54:49,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2155 to 1542. [2024-11-02 19:54:49,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1542 states, 1541 states have (on average 1.2744970798182997) internal successors, (1964), 1541 states have internal predecessors, (1964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 19:54:49,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1542 states to 1542 states and 1964 transitions. [2024-11-02 19:54:49,541 INFO L78 Accepts]: Start accepts. Automaton has 1542 states and 1964 transitions. Word has length 34 [2024-11-02 19:54:49,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 19:54:49,541 INFO L471 AbstractCegarLoop]: Abstraction has 1542 states and 1964 transitions. [2024-11-02 19:54:49,541 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 17 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 19:54:49,542 INFO L276 IsEmpty]: Start isEmpty. Operand 1542 states and 1964 transitions. [2024-11-02 19:54:49,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-02 19:54:49,544 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 19:54:49,544 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 19:54:49,544 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-02 19:54:49,544 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 19:54:49,545 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 19:54:49,545 INFO L85 PathProgramCache]: Analyzing trace with hash -51125177, now seen corresponding path program 1 times [2024-11-02 19:54:49,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-02 19:54:49,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1837884312] [2024-11-02 19:54:49,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 19:54:49,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 19:54:49,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 19:54:49,701 INFO L255 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-02 19:54:49,702 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 19:54:49,772 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-02 19:54:49,772 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 19:54:50,028 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 19:54:50,029 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-02 19:54:50,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1837884312] [2024-11-02 19:54:50,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1837884312] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-02 19:54:50,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-02 19:54:50,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 15 [2024-11-02 19:54:50,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278427576] [2024-11-02 19:54:50,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 19:54:50,030 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-02 19:54:50,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-02 19:54:50,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-02 19:54:50,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2024-11-02 19:54:50,030 INFO L87 Difference]: Start difference. First operand 1542 states and 1964 transitions. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 19:54:50,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 19:54:50,235 INFO L93 Difference]: Finished difference Result 2702 states and 3433 transitions. [2024-11-02 19:54:50,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-02 19:54:50,236 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2024-11-02 19:54:50,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 19:54:50,243 INFO L225 Difference]: With dead ends: 2702 [2024-11-02 19:54:50,243 INFO L226 Difference]: Without dead ends: 2306 [2024-11-02 19:54:50,245 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2024-11-02 19:54:50,246 INFO L432 NwaCegarLoop]: 125 mSDtfsCounter, 149 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 19:54:50,246 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 411 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 19:54:50,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2306 states. [2024-11-02 19:54:50,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2306 to 1526. [2024-11-02 19:54:50,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1526 states, 1525 states have (on average 1.2760655737704918) internal successors, (1946), 1525 states have internal predecessors, (1946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 19:54:50,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1526 states to 1526 states and 1946 transitions. [2024-11-02 19:54:50,314 INFO L78 Accepts]: Start accepts. Automaton has 1526 states and 1946 transitions. Word has length 35 [2024-11-02 19:54:50,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 19:54:50,314 INFO L471 AbstractCegarLoop]: Abstraction has 1526 states and 1946 transitions. [2024-11-02 19:54:50,315 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 19:54:50,315 INFO L276 IsEmpty]: Start isEmpty. Operand 1526 states and 1946 transitions. [2024-11-02 19:54:50,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-02 19:54:50,316 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 19:54:50,317 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 19:54:50,317 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-02 19:54:50,317 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 19:54:50,317 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 19:54:50,317 INFO L85 PathProgramCache]: Analyzing trace with hash -879404219, now seen corresponding path program 1 times [2024-11-02 19:54:50,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-02 19:54:50,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [367632427] [2024-11-02 19:54:50,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 19:54:50,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 19:54:50,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 19:54:50,434 INFO L255 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-02 19:54:50,435 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 19:54:50,444 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-02 19:54:50,444 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 19:54:50,452 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-02 19:54:50,452 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-02 19:54:50,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [367632427] [2024-11-02 19:54:50,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [367632427] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-02 19:54:50,452 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-02 19:54:50,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2024-11-02 19:54:50,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394273369] [2024-11-02 19:54:50,453 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-02 19:54:50,453 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-02 19:54:50,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-02 19:54:50,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-02 19:54:50,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-02 19:54:50,454 INFO L87 Difference]: Start difference. First operand 1526 states and 1946 transitions. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 19:54:50,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 19:54:50,469 INFO L93 Difference]: Finished difference Result 1532 states and 1951 transitions. [2024-11-02 19:54:50,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 19:54:50,470 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2024-11-02 19:54:50,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 19:54:50,471 INFO L225 Difference]: With dead ends: 1532 [2024-11-02 19:54:50,471 INFO L226 Difference]: Without dead ends: 251 [2024-11-02 19:54:50,472 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-02 19:54:50,473 INFO L432 NwaCegarLoop]: 47 mSDtfsCounter, 44 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-02 19:54:50,473 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 53 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-02 19:54:50,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2024-11-02 19:54:50,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 251. [2024-11-02 19:54:50,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 250 states have (on average 1.244) internal successors, (311), 250 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 19:54:50,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 311 transitions. [2024-11-02 19:54:50,482 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 311 transitions. Word has length 35 [2024-11-02 19:54:50,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 19:54:50,482 INFO L471 AbstractCegarLoop]: Abstraction has 251 states and 311 transitions. [2024-11-02 19:54:50,482 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 19:54:50,482 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 311 transitions. [2024-11-02 19:54:50,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-02 19:54:50,483 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 19:54:50,483 INFO L215 NwaCegarLoop]: trace histogram [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 19:54:50,483 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-02 19:54:50,483 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 19:54:50,483 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 19:54:50,483 INFO L85 PathProgramCache]: Analyzing trace with hash -668178384, now seen corresponding path program 1 times [2024-11-02 19:54:50,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-02 19:54:50,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [9297174] [2024-11-02 19:54:50,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 19:54:50,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 19:54:50,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 19:54:50,622 INFO L255 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-02 19:54:50,623 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 19:54:50,738 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-02 19:54:50,738 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 19:54:50,878 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-02 19:54:50,878 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-02 19:54:50,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [9297174] [2024-11-02 19:54:50,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [9297174] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-02 19:54:50,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-02 19:54:50,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 15 [2024-11-02 19:54:50,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716009861] [2024-11-02 19:54:50,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 19:54:50,879 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-02 19:54:50,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-02 19:54:50,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-02 19:54:50,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2024-11-02 19:54:50,880 INFO L87 Difference]: Start difference. First operand 251 states and 311 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 19:54:51,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 19:54:51,114 INFO L93 Difference]: Finished difference Result 503 states and 622 transitions. [2024-11-02 19:54:51,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-02 19:54:51,115 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2024-11-02 19:54:51,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 19:54:51,116 INFO L225 Difference]: With dead ends: 503 [2024-11-02 19:54:51,116 INFO L226 Difference]: Without dead ends: 349 [2024-11-02 19:54:51,117 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2024-11-02 19:54:51,117 INFO L432 NwaCegarLoop]: 107 mSDtfsCounter, 225 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-02 19:54:51,118 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [225 Valid, 431 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-02 19:54:51,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2024-11-02 19:54:51,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 255. [2024-11-02 19:54:51,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 1.220472440944882) internal successors, (310), 254 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 19:54:51,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 310 transitions. [2024-11-02 19:54:51,128 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 310 transitions. Word has length 36 [2024-11-02 19:54:51,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 19:54:51,128 INFO L471 AbstractCegarLoop]: Abstraction has 255 states and 310 transitions. [2024-11-02 19:54:51,128 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 19:54:51,128 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 310 transitions. [2024-11-02 19:54:51,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-11-02 19:54:51,129 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 19:54:51,129 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 19:54:51,129 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-02 19:54:51,129 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 19:54:51,129 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 19:54:51,130 INFO L85 PathProgramCache]: Analyzing trace with hash 2086747953, now seen corresponding path program 1 times [2024-11-02 19:54:51,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-02 19:54:51,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2061102119] [2024-11-02 19:54:51,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 19:54:51,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 19:54:51,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 19:54:51,265 INFO L255 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-02 19:54:51,268 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 19:54:51,420 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 19:54:51,421 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 19:54:51,516 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 19:54:51,516 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-02 19:54:51,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2061102119] [2024-11-02 19:54:51,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [2061102119] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 19:54:51,516 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-02 19:54:51,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2024-11-02 19:54:51,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922674095] [2024-11-02 19:54:51,517 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-02 19:54:51,517 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-02 19:54:51,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-02 19:54:51,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-02 19:54:51,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2024-11-02 19:54:51,518 INFO L87 Difference]: Start difference. First operand 255 states and 310 transitions. Second operand has 11 states, 11 states have (on average 5.7272727272727275) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 19:54:52,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 19:54:52,018 INFO L93 Difference]: Finished difference Result 594 states and 730 transitions. [2024-11-02 19:54:52,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-02 19:54:52,018 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.7272727272727275) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2024-11-02 19:54:52,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 19:54:52,020 INFO L225 Difference]: With dead ends: 594 [2024-11-02 19:54:52,020 INFO L226 Difference]: Without dead ends: 424 [2024-11-02 19:54:52,021 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2024-11-02 19:54:52,021 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 323 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 444 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-02 19:54:52,021 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [323 Valid, 110 Invalid, 471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 444 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-02 19:54:52,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2024-11-02 19:54:52,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 353. [2024-11-02 19:54:52,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 352 states have (on average 1.2272727272727273) internal successors, (432), 352 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 19:54:52,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 432 transitions. [2024-11-02 19:54:52,035 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 432 transitions. Word has length 38 [2024-11-02 19:54:52,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 19:54:52,035 INFO L471 AbstractCegarLoop]: Abstraction has 353 states and 432 transitions. [2024-11-02 19:54:52,035 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.7272727272727275) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 19:54:52,035 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 432 transitions. [2024-11-02 19:54:52,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-02 19:54:52,036 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 19:54:52,036 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 19:54:52,036 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-02 19:54:52,036 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 19:54:52,037 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 19:54:52,037 INFO L85 PathProgramCache]: Analyzing trace with hash -1070943366, now seen corresponding path program 1 times [2024-11-02 19:54:52,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-02 19:54:52,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1678208902] [2024-11-02 19:54:52,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 19:54:52,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 19:54:52,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 19:54:52,272 INFO L255 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-02 19:54:52,274 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 19:54:52,447 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 19:54:52,447 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 19:54:52,626 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 19:54:52,627 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-02 19:54:52,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1678208902] [2024-11-02 19:54:52,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1678208902] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 19:54:52,627 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-02 19:54:52,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2024-11-02 19:54:52,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728072681] [2024-11-02 19:54:52,627 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-02 19:54:52,628 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-02 19:54:52,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-02 19:54:52,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-02 19:54:52,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2024-11-02 19:54:52,629 INFO L87 Difference]: Start difference. First operand 353 states and 432 transitions. Second operand has 17 states, 17 states have (on average 3.8823529411764706) internal successors, (66), 17 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 19:54:53,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 19:54:53,389 INFO L93 Difference]: Finished difference Result 700 states and 866 transitions. [2024-11-02 19:54:53,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-02 19:54:53,389 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.8823529411764706) internal successors, (66), 17 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2024-11-02 19:54:53,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 19:54:53,391 INFO L225 Difference]: With dead ends: 700 [2024-11-02 19:54:53,391 INFO L226 Difference]: Without dead ends: 463 [2024-11-02 19:54:53,392 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=315, Invalid=615, Unknown=0, NotChecked=0, Total=930 [2024-11-02 19:54:53,392 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 541 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 804 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 541 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 855 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 804 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-02 19:54:53,393 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [541 Valid, 160 Invalid, 855 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 804 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-02 19:54:53,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2024-11-02 19:54:53,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 371. [2024-11-02 19:54:53,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 370 states have (on average 1.2135135135135136) internal successors, (449), 370 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 19:54:53,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 449 transitions. [2024-11-02 19:54:53,407 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 449 transitions. Word has length 40 [2024-11-02 19:54:53,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 19:54:53,407 INFO L471 AbstractCegarLoop]: Abstraction has 371 states and 449 transitions. [2024-11-02 19:54:53,408 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.8823529411764706) internal successors, (66), 17 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 19:54:53,408 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 449 transitions. [2024-11-02 19:54:53,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-02 19:54:53,408 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 19:54:53,408 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 19:54:53,408 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-02 19:54:53,409 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 19:54:53,409 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 19:54:53,409 INFO L85 PathProgramCache]: Analyzing trace with hash 1961506894, now seen corresponding path program 1 times [2024-11-02 19:54:53,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-02 19:54:53,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2103357129] [2024-11-02 19:54:53,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 19:54:53,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 19:54:53,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 19:54:53,832 INFO L255 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-02 19:54:53,833 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 19:54:54,032 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 19:54:54,032 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 19:54:54,243 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 19:54:54,243 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-02 19:54:54,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2103357129] [2024-11-02 19:54:54,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [2103357129] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 19:54:54,244 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-02 19:54:54,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 15 [2024-11-02 19:54:54,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087572959] [2024-11-02 19:54:54,244 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-02 19:54:54,244 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-02 19:54:54,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-02 19:54:54,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-02 19:54:54,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2024-11-02 19:54:54,245 INFO L87 Difference]: Start difference. First operand 371 states and 449 transitions. Second operand has 15 states, 15 states have (on average 5.0) internal successors, (75), 15 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 19:54:55,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 19:54:55,003 INFO L93 Difference]: Finished difference Result 675 states and 825 transitions. [2024-11-02 19:54:55,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-02 19:54:55,004 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.0) internal successors, (75), 15 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2024-11-02 19:54:55,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 19:54:55,006 INFO L225 Difference]: With dead ends: 675 [2024-11-02 19:54:55,006 INFO L226 Difference]: Without dead ends: 417 [2024-11-02 19:54:55,007 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=191, Invalid=621, Unknown=0, NotChecked=0, Total=812 [2024-11-02 19:54:55,008 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 637 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 882 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 637 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 961 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 882 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-02 19:54:55,008 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [637 Valid, 157 Invalid, 961 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 882 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-02 19:54:55,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2024-11-02 19:54:55,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 380. [2024-11-02 19:54:55,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 379 states have (on average 1.2031662269129288) internal successors, (456), 379 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 19:54:55,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 456 transitions. [2024-11-02 19:54:55,025 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 456 transitions. Word has length 44 [2024-11-02 19:54:55,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 19:54:55,026 INFO L471 AbstractCegarLoop]: Abstraction has 380 states and 456 transitions. [2024-11-02 19:54:55,026 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.0) internal successors, (75), 15 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 19:54:55,026 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 456 transitions. [2024-11-02 19:54:55,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-11-02 19:54:55,027 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 19:54:55,027 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 19:54:55,027 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-02 19:54:55,027 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 19:54:55,028 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 19:54:55,028 INFO L85 PathProgramCache]: Analyzing trace with hash 1294214785, now seen corresponding path program 1 times [2024-11-02 19:54:55,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-02 19:54:55,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [478901480] [2024-11-02 19:54:55,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 19:54:55,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 19:54:55,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 19:54:55,288 INFO L255 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-02 19:54:55,290 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 19:54:55,325 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 32 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-02 19:54:55,325 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 19:54:55,367 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 32 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-02 19:54:55,368 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-02 19:54:55,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [478901480] [2024-11-02 19:54:55,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [478901480] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 19:54:55,368 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-02 19:54:55,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2024-11-02 19:54:55,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851638478] [2024-11-02 19:54:55,368 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-02 19:54:55,369 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-02 19:54:55,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-02 19:54:55,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-02 19:54:55,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-11-02 19:54:55,370 INFO L87 Difference]: Start difference. First operand 380 states and 456 transitions. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 19:54:55,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 19:54:55,502 INFO L93 Difference]: Finished difference Result 759 states and 916 transitions. [2024-11-02 19:54:55,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-02 19:54:55,502 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2024-11-02 19:54:55,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 19:54:55,504 INFO L225 Difference]: With dead ends: 759 [2024-11-02 19:54:55,504 INFO L226 Difference]: Without dead ends: 402 [2024-11-02 19:54:55,505 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-11-02 19:54:55,505 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 69 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 19:54:55,505 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 67 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 19:54:55,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2024-11-02 19:54:55,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 394. [2024-11-02 19:54:55,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 393 states have (on average 1.183206106870229) internal successors, (465), 393 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 19:54:55,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 465 transitions. [2024-11-02 19:54:55,523 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 465 transitions. Word has length 60 [2024-11-02 19:54:55,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 19:54:55,523 INFO L471 AbstractCegarLoop]: Abstraction has 394 states and 465 transitions. [2024-11-02 19:54:55,523 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 19:54:55,523 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 465 transitions. [2024-11-02 19:54:55,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-11-02 19:54:55,524 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 19:54:55,524 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 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] [2024-11-02 19:54:55,524 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-02 19:54:55,524 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 19:54:55,525 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 19:54:55,525 INFO L85 PathProgramCache]: Analyzing trace with hash 1493994486, now seen corresponding path program 1 times [2024-11-02 19:54:55,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-02 19:54:55,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1019759826] [2024-11-02 19:54:55,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 19:54:55,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 19:54:55,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 19:54:55,700 INFO L255 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-02 19:54:55,702 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 19:54:55,803 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 62 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-02 19:54:55,803 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 19:54:55,904 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 47 proven. 21 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-02 19:54:55,904 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-02 19:54:55,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1019759826] [2024-11-02 19:54:55,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1019759826] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 19:54:55,905 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-02 19:54:55,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2024-11-02 19:54:55,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098163439] [2024-11-02 19:54:55,905 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-02 19:54:55,905 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-02 19:54:55,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-02 19:54:55,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-02 19:54:55,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-11-02 19:54:55,906 INFO L87 Difference]: Start difference. First operand 394 states and 465 transitions. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 19:54:56,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 19:54:56,143 INFO L93 Difference]: Finished difference Result 1061 states and 1245 transitions. [2024-11-02 19:54:56,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-02 19:54:56,144 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2024-11-02 19:54:56,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 19:54:56,146 INFO L225 Difference]: With dead ends: 1061 [2024-11-02 19:54:56,146 INFO L226 Difference]: Without dead ends: 690 [2024-11-02 19:54:56,147 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2024-11-02 19:54:56,147 INFO L432 NwaCegarLoop]: 65 mSDtfsCounter, 178 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 19:54:56,148 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 244 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 19:54:56,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2024-11-02 19:54:56,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 525. [2024-11-02 19:54:56,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 524 states have (on average 1.1793893129770991) internal successors, (618), 524 states have internal predecessors, (618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 19:54:56,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 618 transitions. [2024-11-02 19:54:56,175 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 618 transitions. Word has length 70 [2024-11-02 19:54:56,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 19:54:56,175 INFO L471 AbstractCegarLoop]: Abstraction has 525 states and 618 transitions. [2024-11-02 19:54:56,175 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 19:54:56,176 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 618 transitions. [2024-11-02 19:54:56,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-11-02 19:54:56,177 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 19:54:56,177 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2024-11-02 19:54:56,177 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-11-02 19:54:56,177 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 19:54:56,177 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 19:54:56,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1634543096, now seen corresponding path program 2 times [2024-11-02 19:54:56,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-02 19:54:56,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1167409138] [2024-11-02 19:54:56,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 19:54:56,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 19:55:00,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 19:55:00,421 INFO L255 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-02 19:55:00,426 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 19:55:00,602 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 53 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-02 19:55:00,602 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 19:55:00,858 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 47 proven. 29 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-02 19:55:00,858 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-02 19:55:00,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1167409138] [2024-11-02 19:55:00,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1167409138] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 19:55:00,858 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-02 19:55:00,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9] total 13 [2024-11-02 19:55:00,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677256174] [2024-11-02 19:55:00,858 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-02 19:55:00,859 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-02 19:55:00,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-02 19:55:00,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-02 19:55:00,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2024-11-02 19:55:00,860 INFO L87 Difference]: Start difference. First operand 525 states and 618 transitions. Second operand has 13 states, 13 states have (on average 7.846153846153846) internal successors, (102), 13 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 19:55:01,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 19:55:01,240 INFO L93 Difference]: Finished difference Result 869 states and 996 transitions. [2024-11-02 19:55:01,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-02 19:55:01,241 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 7.846153846153846) internal successors, (102), 13 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2024-11-02 19:55:01,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 19:55:01,243 INFO L225 Difference]: With dead ends: 869 [2024-11-02 19:55:01,243 INFO L226 Difference]: Without dead ends: 753 [2024-11-02 19:55:01,244 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=139, Invalid=413, Unknown=0, NotChecked=0, Total=552 [2024-11-02 19:55:01,245 INFO L432 NwaCegarLoop]: 73 mSDtfsCounter, 198 mSDsluCounter, 424 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 497 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-02 19:55:01,245 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 497 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-02 19:55:01,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 753 states. [2024-11-02 19:55:01,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 753 to 515. [2024-11-02 19:55:01,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 514 states have (on average 1.178988326848249) internal successors, (606), 514 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 19:55:01,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 606 transitions. [2024-11-02 19:55:01,276 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 606 transitions. Word has length 70 [2024-11-02 19:55:01,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 19:55:01,276 INFO L471 AbstractCegarLoop]: Abstraction has 515 states and 606 transitions. [2024-11-02 19:55:01,276 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.846153846153846) internal successors, (102), 13 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 19:55:01,276 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 606 transitions. [2024-11-02 19:55:01,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-11-02 19:55:01,277 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 19:55:01,277 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 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] [2024-11-02 19:55:01,278 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-11-02 19:55:01,278 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 19:55:01,278 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 19:55:01,278 INFO L85 PathProgramCache]: Analyzing trace with hash 605183798, now seen corresponding path program 3 times [2024-11-02 19:55:01,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-02 19:55:01,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1271750310] [2024-11-02 19:55:01,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 19:55:01,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 19:55:09,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 19:55:09,029 INFO L255 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-11-02 19:55:09,034 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 19:55:11,493 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 19:55:11,494 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 19:55:13,494 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 19:55:13,495 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-02 19:55:13,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1271750310] [2024-11-02 19:55:13,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1271750310] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 19:55:13,495 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-02 19:55:13,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 47 [2024-11-02 19:55:13,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674104556] [2024-11-02 19:55:13,495 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-02 19:55:13,496 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-11-02 19:55:13,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-02 19:55:13,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-11-02 19:55:13,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1999, Unknown=0, NotChecked=0, Total=2162 [2024-11-02 19:55:13,497 INFO L87 Difference]: Start difference. First operand 515 states and 606 transitions. Second operand has 47 states, 47 states have (on average 2.9361702127659575) internal successors, (138), 47 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 19:55:25,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 19:55:25,488 INFO L93 Difference]: Finished difference Result 1105 states and 1277 transitions. [2024-11-02 19:55:25,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2024-11-02 19:55:25,489 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.9361702127659575) internal successors, (138), 47 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2024-11-02 19:55:25,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 19:55:25,491 INFO L225 Difference]: With dead ends: 1105 [2024-11-02 19:55:25,491 INFO L226 Difference]: Without dead ends: 775 [2024-11-02 19:55:25,495 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3255 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=2601, Invalid=13655, Unknown=0, NotChecked=0, Total=16256 [2024-11-02 19:55:25,496 INFO L432 NwaCegarLoop]: 248 mSDtfsCounter, 1661 mSDsluCounter, 4248 mSDsCounter, 0 mSdLazyCounter, 4396 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1661 SdHoareTripleChecker+Valid, 4496 SdHoareTripleChecker+Invalid, 4496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 4396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2024-11-02 19:55:25,496 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1661 Valid, 4496 Invalid, 4496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 4396 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2024-11-02 19:55:25,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 775 states. [2024-11-02 19:55:25,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 775 to 561. [2024-11-02 19:55:25,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 561 states, 560 states have (on average 1.1696428571428572) internal successors, (655), 560 states have internal predecessors, (655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 19:55:25,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 561 states to 561 states and 655 transitions. [2024-11-02 19:55:25,545 INFO L78 Accepts]: Start accepts. Automaton has 561 states and 655 transitions. Word has length 70 [2024-11-02 19:55:25,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 19:55:25,545 INFO L471 AbstractCegarLoop]: Abstraction has 561 states and 655 transitions. [2024-11-02 19:55:25,545 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.9361702127659575) internal successors, (138), 47 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 19:55:25,545 INFO L276 IsEmpty]: Start isEmpty. Operand 561 states and 655 transitions. [2024-11-02 19:55:25,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-11-02 19:55:25,546 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 19:55:25,546 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 19:55:25,546 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-11-02 19:55:25,547 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 19:55:25,547 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 19:55:25,547 INFO L85 PathProgramCache]: Analyzing trace with hash -1235371034, now seen corresponding path program 1 times [2024-11-02 19:55:25,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-02 19:55:25,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [476563918] [2024-11-02 19:55:25,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 19:55:25,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 19:55:42,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 19:55:42,034 INFO L255 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-11-02 19:55:42,038 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 19:55:44,573 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 19:55:44,573 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 19:55:47,259 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 19:55:47,260 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-02 19:55:47,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [476563918] [2024-11-02 19:55:47,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [476563918] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 19:55:47,260 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-02 19:55:47,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26] total 49 [2024-11-02 19:55:47,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705889969] [2024-11-02 19:55:47,260 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-02 19:55:47,261 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-11-02 19:55:47,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-02 19:55:47,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-11-02 19:55:47,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=2180, Unknown=0, NotChecked=0, Total=2352 [2024-11-02 19:55:47,262 INFO L87 Difference]: Start difference. First operand 561 states and 655 transitions. Second operand has 49 states, 49 states have (on average 2.979591836734694) internal successors, (146), 49 states have internal predecessors, (146), 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)