/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-356b6ba-m [2024-10-31 15:02:51,588 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-31 15:02:51,656 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Bitvector.epf [2024-10-31 15:02:51,693 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-31 15:02:51,693 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-31 15:02:51,694 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-31 15:02:51,694 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-31 15:02:51,695 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-31 15:02:51,695 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-31 15:02:51,696 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-31 15:02:51,707 INFO L153 SettingsManager]: * Use SBE=true [2024-10-31 15:02:51,708 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-31 15:02:51,709 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-31 15:02:51,709 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-31 15:02:51,710 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-31 15:02:51,710 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-31 15:02:51,710 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-31 15:02:51,711 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-31 15:02:51,711 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-31 15:02:51,713 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-31 15:02:51,713 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-10-31 15:02:51,716 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-31 15:02:51,716 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-10-31 15:02:51,716 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-31 15:02:51,716 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-31 15:02:51,717 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-31 15:02:51,717 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-31 15:02:51,717 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-31 15:02:51,717 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-31 15:02:51,718 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-31 15:02:51,718 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 15:02:51,718 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-31 15:02:51,719 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-31 15:02:51,719 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-31 15:02:51,720 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2024-10-31 15:02:51,720 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-10-31 15:02:51,720 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-31 15:02:51,720 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-31 15:02:51,720 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-31 15:02:51,721 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-31 15:02:51,721 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2024-10-31 15:02:51,721 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Allow undefined functions -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol [2024-10-31 15:02:52,030 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-31 15:02:52,050 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-31 15:02:52,054 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-31 15:02:52,055 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-31 15:02:52,056 INFO L274 PluginConnector]: CDTParser initialized [2024-10-31 15:02:52,057 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/byte_add_1-1.i [2024-10-31 15:02:53,337 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-31 15:02:53,530 INFO L384 CDTParser]: Found 1 translation units. [2024-10-31 15:02:53,531 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/bitvector/byte_add_1-1.i [2024-10-31 15:02:53,543 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fa97e62f0/666561a78bf54c3a86d92e4d9c86532f/FLAG840cddba6 [2024-10-31 15:02:53,559 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fa97e62f0/666561a78bf54c3a86d92e4d9c86532f [2024-10-31 15:02:53,562 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-31 15:02:53,564 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-10-31 15:02:53,565 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-31 15:02:53,565 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-31 15:02:53,570 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-31 15:02:53,571 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 03:02:53" (1/1) ... [2024-10-31 15:02:53,571 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a3377b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 03:02:53, skipping insertion in model container [2024-10-31 15:02:53,572 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 03:02:53" (1/1) ... [2024-10-31 15:02:53,600 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-31 15:02:53,773 WARN L251 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/bitvector/byte_add_1-1.i[1168,1181] [2024-10-31 15:02:53,817 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 15:02:53,830 INFO L200 MainTranslator]: Completed pre-run [2024-10-31 15:02:53,844 WARN L251 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/bitvector/byte_add_1-1.i[1168,1181] [2024-10-31 15:02:53,865 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 15:02:53,887 INFO L204 MainTranslator]: Completed translation [2024-10-31 15:02:53,889 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 03:02:53 WrapperNode [2024-10-31 15:02:53,889 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-31 15:02:53,890 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-31 15:02:53,890 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-31 15:02:53,890 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-31 15:02:53,895 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 03:02:53" (1/1) ... [2024-10-31 15:02:53,902 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 03:02:53" (1/1) ... [2024-10-31 15:02:53,923 INFO L138 Inliner]: procedures = 16, calls = 8, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 123 [2024-10-31 15:02:53,924 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-31 15:02:53,926 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-31 15:02:53,926 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-31 15:02:53,926 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-31 15:02:53,935 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 03:02:53" (1/1) ... [2024-10-31 15:02:53,935 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 03:02:53" (1/1) ... [2024-10-31 15:02:53,938 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 03:02:53" (1/1) ... [2024-10-31 15:02:53,959 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-10-31 15:02:53,959 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 03:02:53" (1/1) ... [2024-10-31 15:02:53,963 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 03:02:53" (1/1) ... [2024-10-31 15:02:53,968 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 03:02:53" (1/1) ... [2024-10-31 15:02:53,979 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 03:02:53" (1/1) ... [2024-10-31 15:02:53,981 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 03:02:53" (1/1) ... [2024-10-31 15:02:53,982 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 03:02:53" (1/1) ... [2024-10-31 15:02:53,984 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-31 15:02:53,989 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-31 15:02:53,989 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-31 15:02:53,989 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-31 15:02:53,990 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 03:02:53" (1/1) ... [2024-10-31 15:02:53,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 15:02:54,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-31 15:02:54,017 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-31 15:02:54,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-31 15:02:54,043 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-31 15:02:54,043 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-10-31 15:02:54,043 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-31 15:02:54,043 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-31 15:02:54,102 INFO L238 CfgBuilder]: Building ICFG [2024-10-31 15:02:54,104 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-31 15:02:54,449 INFO L? ?]: Removed 23 outVars from TransFormulas that were not future-live. [2024-10-31 15:02:54,450 INFO L287 CfgBuilder]: Performing block encoding [2024-10-31 15:02:54,467 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-31 15:02:54,468 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-10-31 15:02:54,468 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 03:02:54 BoogieIcfgContainer [2024-10-31 15:02:54,469 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-31 15:02:54,471 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-31 15:02:54,471 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-31 15:02:54,474 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-31 15:02:54,474 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.10 03:02:53" (1/3) ... [2024-10-31 15:02:54,475 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25189f57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 03:02:54, skipping insertion in model container [2024-10-31 15:02:54,475 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 03:02:53" (2/3) ... [2024-10-31 15:02:54,475 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25189f57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 03:02:54, skipping insertion in model container [2024-10-31 15:02:54,475 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 03:02:54" (3/3) ... [2024-10-31 15:02:54,477 INFO L112 eAbstractionObserver]: Analyzing ICFG byte_add_1-1.i [2024-10-31 15:02:54,493 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-31 15:02:54,494 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-31 15:02:54,556 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-31 15:02:54,562 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;@6d822d86, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-31 15:02:54,563 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-31 15:02:54,566 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) [2024-10-31 15:02:54,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-10-31 15:02:54,572 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:02:54,573 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 15:02:54,573 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:02:54,580 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:02:54,580 INFO L85 PathProgramCache]: Analyzing trace with hash 255061167, now seen corresponding path program 1 times [2024-10-31 15:02:54,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:02:54,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [467697358] [2024-10-31 15:02:54,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:02:54,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:02:54,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:02:54,782 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 1 conjuncts are in the unsatisfiable core [2024-10-31 15:02:54,787 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:02:54,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 15:02:54,804 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:02:54,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 15:02:54,810 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:02:54,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [467697358] [2024-10-31 15:02:54,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [467697358] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 15:02:54,811 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 15:02:54,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2024-10-31 15:02:54,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870152129] [2024-10-31 15:02:54,813 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 15:02:54,816 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-31 15:02:54,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:02:54,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-31 15:02:54,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-31 15:02:54,840 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) [2024-10-31 15:02:54,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:02:54,858 INFO L93 Difference]: Finished difference Result 57 states and 92 transitions. [2024-10-31 15:02:54,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-31 15:02:54,860 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 [2024-10-31 15:02:54,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:02:54,868 INFO L225 Difference]: With dead ends: 57 [2024-10-31 15:02:54,868 INFO L226 Difference]: Without dead ends: 38 [2024-10-31 15:02:54,871 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 [2024-10-31 15:02:54,875 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 [2024-10-31 15:02:54,876 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] [2024-10-31 15:02:54,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2024-10-31 15:02:54,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2024-10-31 15:02:54,904 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) [2024-10-31 15:02:54,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 64 transitions. [2024-10-31 15:02:54,907 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 64 transitions. Word has length 12 [2024-10-31 15:02:54,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:02:54,908 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 64 transitions. [2024-10-31 15:02:54,908 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) [2024-10-31 15:02:54,908 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 64 transitions. [2024-10-31 15:02:54,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-10-31 15:02:54,909 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:02:54,909 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 15:02:54,909 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-31 15:02:54,909 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:02:54,910 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:02:54,911 INFO L85 PathProgramCache]: Analyzing trace with hash 1803477009, now seen corresponding path program 1 times [2024-10-31 15:02:54,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:02:54,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1883299785] [2024-10-31 15:02:54,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:02:54,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:02:55,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:02:55,356 INFO L255 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-31 15:02:55,359 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:02:55,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 15:02:55,415 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:02:55,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 15:02:55,448 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:02:55,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1883299785] [2024-10-31 15:02:55,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1883299785] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 15:02:55,448 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 15:02:55,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2024-10-31 15:02:55,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530286461] [2024-10-31 15:02:55,449 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 15:02:55,451 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 15:02:55,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:02:55,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 15:02:55,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-31 15:02:55,455 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) [2024-10-31 15:02:55,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:02:55,701 INFO L93 Difference]: Finished difference Result 107 states and 191 transitions. [2024-10-31 15:02:55,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 15:02:55,702 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 [2024-10-31 15:02:55,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:02:55,703 INFO L225 Difference]: With dead ends: 107 [2024-10-31 15:02:55,703 INFO L226 Difference]: Without dead ends: 79 [2024-10-31 15:02:55,704 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 [2024-10-31 15:02:55,705 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 [2024-10-31 15:02:55,705 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] [2024-10-31 15:02:55,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2024-10-31 15:02:55,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 63. [2024-10-31 15:02:55,713 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) [2024-10-31 15:02:55,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 94 transitions. [2024-10-31 15:02:55,715 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 94 transitions. Word has length 12 [2024-10-31 15:02:55,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:02:55,716 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 94 transitions. [2024-10-31 15:02:55,716 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) [2024-10-31 15:02:55,716 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 94 transitions. [2024-10-31 15:02:55,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-10-31 15:02:55,717 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:02:55,717 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] [2024-10-31 15:02:55,717 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-31 15:02:55,718 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:02:55,723 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:02:55,723 INFO L85 PathProgramCache]: Analyzing trace with hash -235076041, now seen corresponding path program 1 times [2024-10-31 15:02:55,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:02:55,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [246799292] [2024-10-31 15:02:55,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:02:55,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:02:56,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:02:56,028 INFO L255 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-31 15:02:56,032 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:02:56,067 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-31 15:02:56,067 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:02:56,085 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-31 15:02:56,085 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:02:56,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [246799292] [2024-10-31 15:02:56,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [246799292] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 15:02:56,086 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 15:02:56,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 3] imperfect sequences [] total 5 [2024-10-31 15:02:56,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531616220] [2024-10-31 15:02:56,091 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 15:02:56,091 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 15:02:56,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:02:56,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 15:02:56,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-10-31 15:02:56,093 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) [2024-10-31 15:02:56,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:02:56,383 INFO L93 Difference]: Finished difference Result 150 states and 239 transitions. [2024-10-31 15:02:56,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-31 15:02:56,385 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 [2024-10-31 15:02:56,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:02:56,387 INFO L225 Difference]: With dead ends: 150 [2024-10-31 15:02:56,387 INFO L226 Difference]: Without dead ends: 102 [2024-10-31 15:02:56,387 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 [2024-10-31 15:02:56,391 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, 0.3s IncrementalHoareTripleChecker+Time [2024-10-31 15:02:56,392 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 70 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-31 15:02:56,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2024-10-31 15:02:56,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 98. [2024-10-31 15:02:56,411 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) [2024-10-31 15:02:56,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 142 transitions. [2024-10-31 15:02:56,412 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 142 transitions. Word has length 24 [2024-10-31 15:02:56,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:02:56,413 INFO L471 AbstractCegarLoop]: Abstraction has 98 states and 142 transitions. [2024-10-31 15:02:56,413 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) [2024-10-31 15:02:56,413 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 142 transitions. [2024-10-31 15:02:56,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-10-31 15:02:56,414 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:02:56,416 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] [2024-10-31 15:02:56,417 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-31 15:02:56,417 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:02:56,419 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:02:56,419 INFO L85 PathProgramCache]: Analyzing trace with hash 730584695, now seen corresponding path program 1 times [2024-10-31 15:02:56,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:02:56,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2109136685] [2024-10-31 15:02:56,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:02:56,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:02:56,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:02:56,689 INFO L255 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-31 15:02:56,691 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:02:56,729 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-10-31 15:02:56,729 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:02:56,772 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-31 15:02:56,773 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:02:56,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2109136685] [2024-10-31 15:02:56,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [2109136685] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 15:02:56,773 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 15:02:56,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 5] imperfect sequences [] total 7 [2024-10-31 15:02:56,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526376754] [2024-10-31 15:02:56,773 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 15:02:56,774 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-31 15:02:56,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:02:56,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-31 15:02:56,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-10-31 15:02:56,775 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) [2024-10-31 15:02:57,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:02:57,071 INFO L93 Difference]: Finished difference Result 351 states and 521 transitions. [2024-10-31 15:02:57,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-31 15:02:57,072 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 [2024-10-31 15:02:57,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:02:57,073 INFO L225 Difference]: With dead ends: 351 [2024-10-31 15:02:57,074 INFO L226 Difference]: Without dead ends: 260 [2024-10-31 15:02:57,074 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2024-10-31 15:02:57,075 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 [2024-10-31 15:02:57,075 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] [2024-10-31 15:02:57,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2024-10-31 15:02:57,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 182. [2024-10-31 15:02:57,088 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) [2024-10-31 15:02:57,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 260 transitions. [2024-10-31 15:02:57,089 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 260 transitions. Word has length 24 [2024-10-31 15:02:57,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:02:57,089 INFO L471 AbstractCegarLoop]: Abstraction has 182 states and 260 transitions. [2024-10-31 15:02:57,090 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) [2024-10-31 15:02:57,090 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 260 transitions. [2024-10-31 15:02:57,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-10-31 15:02:57,091 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:02:57,091 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] [2024-10-31 15:02:57,091 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-31 15:02:57,091 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:02:57,092 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:02:57,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1578156322, now seen corresponding path program 1 times [2024-10-31 15:02:57,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:02:57,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [78920848] [2024-10-31 15:02:57,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:02:57,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:02:57,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:02:57,264 INFO L255 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-31 15:02:57,265 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:02:57,293 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-10-31 15:02:57,293 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:02:57,323 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-31 15:02:57,323 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:02:57,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [78920848] [2024-10-31 15:02:57,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [78920848] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 15:02:57,324 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 15:02:57,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 5] imperfect sequences [] total 7 [2024-10-31 15:02:57,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593327405] [2024-10-31 15:02:57,324 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 15:02:57,325 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-31 15:02:57,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:02:57,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-31 15:02:57,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-10-31 15:02:57,327 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) [2024-10-31 15:02:57,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:02:57,628 INFO L93 Difference]: Finished difference Result 658 states and 945 transitions. [2024-10-31 15:02:57,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-31 15:02:57,629 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 [2024-10-31 15:02:57,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:02:57,632 INFO L225 Difference]: With dead ends: 658 [2024-10-31 15:02:57,632 INFO L226 Difference]: Without dead ends: 492 [2024-10-31 15:02:57,635 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 [2024-10-31 15:02:57,636 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, 0.3s IncrementalHoareTripleChecker+Time [2024-10-31 15:02:57,636 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 191 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-31 15:02:57,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2024-10-31 15:02:57,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 430. [2024-10-31 15:02:57,681 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) [2024-10-31 15:02:57,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 609 transitions. [2024-10-31 15:02:57,685 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 609 transitions. Word has length 26 [2024-10-31 15:02:57,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:02:57,686 INFO L471 AbstractCegarLoop]: Abstraction has 430 states and 609 transitions. [2024-10-31 15:02:57,686 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) [2024-10-31 15:02:57,686 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 609 transitions. [2024-10-31 15:02:57,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-10-31 15:02:57,688 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:02:57,688 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] [2024-10-31 15:02:57,688 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-31 15:02:57,689 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:02:57,689 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:02:57,689 INFO L85 PathProgramCache]: Analyzing trace with hash 1110801003, now seen corresponding path program 1 times [2024-10-31 15:02:57,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:02:57,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1559939073] [2024-10-31 15:02:57,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:02:57,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:02:57,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:02:57,928 INFO L255 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-31 15:02:57,930 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:02:57,980 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-10-31 15:02:57,981 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:02:58,081 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-31 15:02:58,082 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:02:58,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1559939073] [2024-10-31 15:02:58,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1559939073] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 15:02:58,082 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 15:02:58,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 8] imperfect sequences [] total 13 [2024-10-31 15:02:58,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84903205] [2024-10-31 15:02:58,082 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 15:02:58,083 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-31 15:02:58,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:02:58,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-31 15:02:58,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2024-10-31 15:02:58,084 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) [2024-10-31 15:02:58,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:02:58,618 INFO L93 Difference]: Finished difference Result 1019 states and 1467 transitions. [2024-10-31 15:02:58,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-31 15:02:58,619 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 [2024-10-31 15:02:58,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:02:58,622 INFO L225 Difference]: With dead ends: 1019 [2024-10-31 15:02:58,622 INFO L226 Difference]: Without dead ends: 812 [2024-10-31 15:02:58,623 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 [2024-10-31 15:02:58,623 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, 0.4s IncrementalHoareTripleChecker+Time [2024-10-31 15:02:58,624 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [440 Valid, 546 Invalid, 667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 634 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-31 15:02:58,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2024-10-31 15:02:58,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 780. [2024-10-31 15:02:58,647 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) [2024-10-31 15:02:58,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 1098 transitions. [2024-10-31 15:02:58,650 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 1098 transitions. Word has length 28 [2024-10-31 15:02:58,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:02:58,650 INFO L471 AbstractCegarLoop]: Abstraction has 780 states and 1098 transitions. [2024-10-31 15:02:58,651 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) [2024-10-31 15:02:58,651 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 1098 transitions. [2024-10-31 15:02:58,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-10-31 15:02:58,653 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:02:58,654 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] [2024-10-31 15:02:58,654 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-31 15:02:58,654 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:02:58,654 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:02:58,654 INFO L85 PathProgramCache]: Analyzing trace with hash -2082362030, now seen corresponding path program 1 times [2024-10-31 15:02:58,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:02:58,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1789247322] [2024-10-31 15:02:58,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:02:58,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:02:58,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:02:58,759 INFO L255 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-31 15:02:58,762 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:02:58,782 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 15:02:58,783 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:02:58,803 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 15:02:58,803 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:02:58,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1789247322] [2024-10-31 15:02:58,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1789247322] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 15:02:58,803 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 15:02:58,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2024-10-31 15:02:58,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605702043] [2024-10-31 15:02:58,804 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 15:02:58,804 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 15:02:58,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:02:58,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 15:02:58,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-31 15:02:58,805 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) [2024-10-31 15:02:58,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:02:58,839 INFO L93 Difference]: Finished difference Result 1099 states and 1513 transitions. [2024-10-31 15:02:58,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 15:02:58,840 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 [2024-10-31 15:02:58,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:02:58,844 INFO L225 Difference]: With dead ends: 1099 [2024-10-31 15:02:58,844 INFO L226 Difference]: Without dead ends: 1077 [2024-10-31 15:02:58,845 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 [2024-10-31 15:02:58,845 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 [2024-10-31 15:02:58,846 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] [2024-10-31 15:02:58,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1077 states. [2024-10-31 15:02:58,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1077 to 991. [2024-10-31 15:02:58,879 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) [2024-10-31 15:02:58,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 991 states to 991 states and 1370 transitions. [2024-10-31 15:02:58,882 INFO L78 Accepts]: Start accepts. Automaton has 991 states and 1370 transitions. Word has length 34 [2024-10-31 15:02:58,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:02:58,883 INFO L471 AbstractCegarLoop]: Abstraction has 991 states and 1370 transitions. [2024-10-31 15:02:58,883 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) [2024-10-31 15:02:58,883 INFO L276 IsEmpty]: Start isEmpty. Operand 991 states and 1370 transitions. [2024-10-31 15:02:58,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-10-31 15:02:58,885 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:02:58,885 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] [2024-10-31 15:02:58,885 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-10-31 15:02:58,885 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:02:58,886 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:02:58,886 INFO L85 PathProgramCache]: Analyzing trace with hash 218460560, now seen corresponding path program 1 times [2024-10-31 15:02:58,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:02:58,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [52827074] [2024-10-31 15:02:58,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:02:58,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:02:59,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:02:59,047 INFO L255 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-31 15:02:59,051 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:02:59,213 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 15:02:59,213 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:02:59,383 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 15:02:59,384 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:02:59,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [52827074] [2024-10-31 15:02:59,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [52827074] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 15:02:59,384 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 15:02:59,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 9] imperfect sequences [] total 15 [2024-10-31 15:02:59,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234589611] [2024-10-31 15:02:59,384 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 15:02:59,385 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-31 15:02:59,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:02:59,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-31 15:02:59,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2024-10-31 15:02:59,386 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) [2024-10-31 15:03:00,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:03:00,580 INFO L93 Difference]: Finished difference Result 2442 states and 3378 transitions. [2024-10-31 15:03:00,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-10-31 15:03:00,581 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 [2024-10-31 15:03:00,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:03:00,587 INFO L225 Difference]: With dead ends: 2442 [2024-10-31 15:03:00,587 INFO L226 Difference]: Without dead ends: 1504 [2024-10-31 15:03:00,589 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=350, Invalid=642, Unknown=0, NotChecked=0, Total=992 [2024-10-31 15:03:00,589 INFO L432 NwaCegarLoop]: 63 mSDtfsCounter, 933 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 940 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s 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 [2024-10-31 15:03:00,589 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] [2024-10-31 15:03:00,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1504 states. [2024-10-31 15:03:00,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1504 to 1297. [2024-10-31 15:03:00,627 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) [2024-10-31 15:03:00,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1297 states to 1297 states and 1712 transitions. [2024-10-31 15:03:00,631 INFO L78 Accepts]: Start accepts. Automaton has 1297 states and 1712 transitions. Word has length 34 [2024-10-31 15:03:00,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:03:00,631 INFO L471 AbstractCegarLoop]: Abstraction has 1297 states and 1712 transitions. [2024-10-31 15:03:00,632 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) [2024-10-31 15:03:00,632 INFO L276 IsEmpty]: Start isEmpty. Operand 1297 states and 1712 transitions. [2024-10-31 15:03:00,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-10-31 15:03:00,635 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:03:00,635 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] [2024-10-31 15:03:00,635 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-10-31 15:03:00,636 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:03:00,636 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:03:00,636 INFO L85 PathProgramCache]: Analyzing trace with hash -1990369840, now seen corresponding path program 1 times [2024-10-31 15:03:00,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:03:00,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [25451752] [2024-10-31 15:03:00,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:03:00,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:03:00,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:03:00,665 INFO L255 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-31 15:03:00,667 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:03:00,677 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 15:03:00,677 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:03:00,683 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 15:03:00,683 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:03:00,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [25451752] [2024-10-31 15:03:00,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [25451752] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 15:03:00,684 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 15:03:00,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2024-10-31 15:03:00,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249648432] [2024-10-31 15:03:00,684 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 15:03:00,684 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 15:03:00,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:03:00,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 15:03:00,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-31 15:03:00,685 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) [2024-10-31 15:03:00,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:03:00,853 INFO L93 Difference]: Finished difference Result 2783 states and 3665 transitions. [2024-10-31 15:03:00,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 15:03:00,856 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 [2024-10-31 15:03:00,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:03:00,861 INFO L225 Difference]: With dead ends: 2783 [2024-10-31 15:03:00,861 INFO L226 Difference]: Without dead ends: 1545 [2024-10-31 15:03:00,863 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 [2024-10-31 15:03:00,864 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 [2024-10-31 15:03:00,864 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] [2024-10-31 15:03:00,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1545 states. [2024-10-31 15:03:00,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1545 to 1326. [2024-10-31 15:03:00,920 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) [2024-10-31 15:03:00,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1326 states to 1326 states and 1707 transitions. [2024-10-31 15:03:00,924 INFO L78 Accepts]: Start accepts. Automaton has 1326 states and 1707 transitions. Word has length 34 [2024-10-31 15:03:00,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:03:00,925 INFO L471 AbstractCegarLoop]: Abstraction has 1326 states and 1707 transitions. [2024-10-31 15:03:00,925 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) [2024-10-31 15:03:00,925 INFO L276 IsEmpty]: Start isEmpty. Operand 1326 states and 1707 transitions. [2024-10-31 15:03:00,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-10-31 15:03:00,927 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:03:00,927 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] [2024-10-31 15:03:00,928 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-10-31 15:03:00,928 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:03:00,928 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:03:00,928 INFO L85 PathProgramCache]: Analyzing trace with hash -215362478, now seen corresponding path program 1 times [2024-10-31 15:03:00,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:03:00,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [67135068] [2024-10-31 15:03:00,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:03:00,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:03:01,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:03:01,123 INFO L255 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-10-31 15:03:01,130 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:03:01,245 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 15:03:01,245 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:03:01,414 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 15:03:01,415 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:03:01,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [67135068] [2024-10-31 15:03:01,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [67135068] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 15:03:01,415 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 15:03:01,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 10] imperfect sequences [] total 17 [2024-10-31 15:03:01,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612415780] [2024-10-31 15:03:01,415 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 15:03:01,416 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-31 15:03:01,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:03:01,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-31 15:03:01,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2024-10-31 15:03:01,417 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) [2024-10-31 15:03:03,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:03:03,084 INFO L93 Difference]: Finished difference Result 3128 states and 4009 transitions. [2024-10-31 15:03:03,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-10-31 15:03:03,085 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 [2024-10-31 15:03:03,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:03:03,092 INFO L225 Difference]: With dead ends: 3128 [2024-10-31 15:03:03,092 INFO L226 Difference]: Without dead ends: 2155 [2024-10-31 15:03:03,094 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 [2024-10-31 15:03:03,095 INFO L432 NwaCegarLoop]: 66 mSDtfsCounter, 1138 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 1264 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s 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 [2024-10-31 15:03:03,095 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] [2024-10-31 15:03:03,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2155 states. [2024-10-31 15:03:03,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2155 to 1542. [2024-10-31 15:03:03,151 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) [2024-10-31 15:03:03,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1542 states to 1542 states and 1964 transitions. [2024-10-31 15:03:03,155 INFO L78 Accepts]: Start accepts. Automaton has 1542 states and 1964 transitions. Word has length 34 [2024-10-31 15:03:03,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:03:03,155 INFO L471 AbstractCegarLoop]: Abstraction has 1542 states and 1964 transitions. [2024-10-31 15:03:03,155 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) [2024-10-31 15:03:03,155 INFO L276 IsEmpty]: Start isEmpty. Operand 1542 states and 1964 transitions. [2024-10-31 15:03:03,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-10-31 15:03:03,157 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:03:03,158 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] [2024-10-31 15:03:03,158 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-10-31 15:03:03,158 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:03:03,159 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:03:03,159 INFO L85 PathProgramCache]: Analyzing trace with hash -51125177, now seen corresponding path program 1 times [2024-10-31 15:03:03,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:03:03,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [398926464] [2024-10-31 15:03:03,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:03:03,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:03:03,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:03:03,318 INFO L255 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-31 15:03:03,320 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:03:03,401 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 15:03:03,401 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:03:03,665 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 15:03:03,665 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:03:03,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [398926464] [2024-10-31 15:03:03,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [398926464] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-31 15:03:03,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-31 15:03:03,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 15 [2024-10-31 15:03:03,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964205819] [2024-10-31 15:03:03,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 15:03:03,666 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-31 15:03:03,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:03:03,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-31 15:03:03,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2024-10-31 15:03:03,667 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) [2024-10-31 15:03:03,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:03:03,840 INFO L93 Difference]: Finished difference Result 2702 states and 3433 transitions. [2024-10-31 15:03:03,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-31 15:03:03,841 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 [2024-10-31 15:03:03,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:03:03,848 INFO L225 Difference]: With dead ends: 2702 [2024-10-31 15:03:03,848 INFO L226 Difference]: Without dead ends: 2306 [2024-10-31 15:03:03,849 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2024-10-31 15:03:03,850 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 [2024-10-31 15:03:03,850 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] [2024-10-31 15:03:03,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2306 states. [2024-10-31 15:03:03,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2306 to 1526. [2024-10-31 15:03:03,904 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) [2024-10-31 15:03:03,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1526 states to 1526 states and 1946 transitions. [2024-10-31 15:03:03,908 INFO L78 Accepts]: Start accepts. Automaton has 1526 states and 1946 transitions. Word has length 35 [2024-10-31 15:03:03,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:03:03,908 INFO L471 AbstractCegarLoop]: Abstraction has 1526 states and 1946 transitions. [2024-10-31 15:03:03,908 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) [2024-10-31 15:03:03,909 INFO L276 IsEmpty]: Start isEmpty. Operand 1526 states and 1946 transitions. [2024-10-31 15:03:03,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-10-31 15:03:03,910 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:03:03,910 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] [2024-10-31 15:03:03,911 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-10-31 15:03:03,911 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:03:03,911 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:03:03,911 INFO L85 PathProgramCache]: Analyzing trace with hash -879404219, now seen corresponding path program 1 times [2024-10-31 15:03:03,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:03:03,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1119904579] [2024-10-31 15:03:03,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:03:03,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:03:04,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:03:04,029 INFO L255 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-31 15:03:04,031 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:03:04,039 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-31 15:03:04,039 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:03:04,046 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-31 15:03:04,046 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:03:04,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1119904579] [2024-10-31 15:03:04,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1119904579] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 15:03:04,046 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 15:03:04,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2024-10-31 15:03:04,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488363519] [2024-10-31 15:03:04,047 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 15:03:04,047 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 15:03:04,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:03:04,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 15:03:04,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-31 15:03:04,048 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) [2024-10-31 15:03:04,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:03:04,063 INFO L93 Difference]: Finished difference Result 1532 states and 1951 transitions. [2024-10-31 15:03:04,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 15:03:04,064 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 [2024-10-31 15:03:04,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:03:04,065 INFO L225 Difference]: With dead ends: 1532 [2024-10-31 15:03:04,066 INFO L226 Difference]: Without dead ends: 251 [2024-10-31 15:03:04,067 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 [2024-10-31 15:03:04,067 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 [2024-10-31 15:03:04,067 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] [2024-10-31 15:03:04,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2024-10-31 15:03:04,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 251. [2024-10-31 15:03:04,075 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) [2024-10-31 15:03:04,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 311 transitions. [2024-10-31 15:03:04,076 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 311 transitions. Word has length 35 [2024-10-31 15:03:04,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:03:04,076 INFO L471 AbstractCegarLoop]: Abstraction has 251 states and 311 transitions. [2024-10-31 15:03:04,076 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) [2024-10-31 15:03:04,077 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 311 transitions. [2024-10-31 15:03:04,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-10-31 15:03:04,077 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:03:04,077 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] [2024-10-31 15:03:04,077 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-10-31 15:03:04,077 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:03:04,078 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:03:04,078 INFO L85 PathProgramCache]: Analyzing trace with hash -668178384, now seen corresponding path program 1 times [2024-10-31 15:03:04,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:03:04,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1611363972] [2024-10-31 15:03:04,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:03:04,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:03:04,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:03:04,241 INFO L255 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-31 15:03:04,243 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:03:04,351 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-31 15:03:04,352 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:03:04,484 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-31 15:03:04,484 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:03:04,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1611363972] [2024-10-31 15:03:04,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1611363972] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-31 15:03:04,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-31 15:03:04,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 15 [2024-10-31 15:03:04,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429492052] [2024-10-31 15:03:04,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 15:03:04,485 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-31 15:03:04,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:03:04,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-31 15:03:04,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2024-10-31 15:03:04,486 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) [2024-10-31 15:03:04,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:03:04,710 INFO L93 Difference]: Finished difference Result 503 states and 622 transitions. [2024-10-31 15:03:04,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-31 15:03:04,711 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 [2024-10-31 15:03:04,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:03:04,712 INFO L225 Difference]: With dead ends: 503 [2024-10-31 15:03:04,712 INFO L226 Difference]: Without dead ends: 349 [2024-10-31 15:03:04,713 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 [2024-10-31 15:03:04,713 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 [2024-10-31 15:03:04,713 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] [2024-10-31 15:03:04,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2024-10-31 15:03:04,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 255. [2024-10-31 15:03:04,721 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) [2024-10-31 15:03:04,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 310 transitions. [2024-10-31 15:03:04,722 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 310 transitions. Word has length 36 [2024-10-31 15:03:04,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:03:04,723 INFO L471 AbstractCegarLoop]: Abstraction has 255 states and 310 transitions. [2024-10-31 15:03:04,723 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) [2024-10-31 15:03:04,723 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 310 transitions. [2024-10-31 15:03:04,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-10-31 15:03:04,723 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:03:04,724 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] [2024-10-31 15:03:04,724 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-10-31 15:03:04,724 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:03:04,724 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:03:04,724 INFO L85 PathProgramCache]: Analyzing trace with hash 2086747953, now seen corresponding path program 1 times [2024-10-31 15:03:04,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:03:04,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [445758266] [2024-10-31 15:03:04,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:03:04,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:03:04,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:03:04,838 INFO L255 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-31 15:03:04,841 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:03:04,997 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 15:03:04,997 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:03:05,095 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 15:03:05,095 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:03:05,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [445758266] [2024-10-31 15:03:05,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [445758266] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 15:03:05,096 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 15:03:05,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2024-10-31 15:03:05,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575716330] [2024-10-31 15:03:05,096 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 15:03:05,096 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-31 15:03:05,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:03:05,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-31 15:03:05,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2024-10-31 15:03:05,097 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) [2024-10-31 15:03:05,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:03:05,667 INFO L93 Difference]: Finished difference Result 594 states and 730 transitions. [2024-10-31 15:03:05,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-31 15:03:05,667 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 [2024-10-31 15:03:05,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:03:05,669 INFO L225 Difference]: With dead ends: 594 [2024-10-31 15:03:05,669 INFO L226 Difference]: Without dead ends: 424 [2024-10-31 15:03:05,670 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 [2024-10-31 15:03:05,670 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 [2024-10-31 15:03:05,671 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] [2024-10-31 15:03:05,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2024-10-31 15:03:05,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 353. [2024-10-31 15:03:05,688 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) [2024-10-31 15:03:05,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 432 transitions. [2024-10-31 15:03:05,691 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 432 transitions. Word has length 38 [2024-10-31 15:03:05,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:03:05,691 INFO L471 AbstractCegarLoop]: Abstraction has 353 states and 432 transitions. [2024-10-31 15:03:05,691 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) [2024-10-31 15:03:05,691 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 432 transitions. [2024-10-31 15:03:05,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-10-31 15:03:05,692 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:03:05,692 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] [2024-10-31 15:03:05,693 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-10-31 15:03:05,693 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:03:05,693 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:03:05,694 INFO L85 PathProgramCache]: Analyzing trace with hash -1070943366, now seen corresponding path program 1 times [2024-10-31 15:03:05,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:03:05,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1881291935] [2024-10-31 15:03:05,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:03:05,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:03:05,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:03:05,930 INFO L255 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-31 15:03:05,932 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:03:06,101 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 15:03:06,101 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:03:06,292 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 15:03:06,292 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:03:06,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1881291935] [2024-10-31 15:03:06,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1881291935] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 15:03:06,293 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 15:03:06,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2024-10-31 15:03:06,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371470707] [2024-10-31 15:03:06,293 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 15:03:06,293 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-31 15:03:06,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:03:06,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-31 15:03:06,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2024-10-31 15:03:06,294 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) [2024-10-31 15:03:06,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:03:06,947 INFO L93 Difference]: Finished difference Result 700 states and 866 transitions. [2024-10-31 15:03:06,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-10-31 15:03:06,948 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 [2024-10-31 15:03:06,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:03:06,950 INFO L225 Difference]: With dead ends: 700 [2024-10-31 15:03:06,950 INFO L226 Difference]: Without dead ends: 463 [2024-10-31 15:03:06,950 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 [2024-10-31 15:03:06,953 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 [2024-10-31 15:03:06,953 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] [2024-10-31 15:03:06,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2024-10-31 15:03:06,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 371. [2024-10-31 15:03:06,971 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) [2024-10-31 15:03:06,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 449 transitions. [2024-10-31 15:03:06,972 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 449 transitions. Word has length 40 [2024-10-31 15:03:06,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:03:06,972 INFO L471 AbstractCegarLoop]: Abstraction has 371 states and 449 transitions. [2024-10-31 15:03:06,972 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) [2024-10-31 15:03:06,972 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 449 transitions. [2024-10-31 15:03:06,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-10-31 15:03:06,973 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:03:06,973 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] [2024-10-31 15:03:06,973 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-10-31 15:03:06,973 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:03:06,974 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:03:06,974 INFO L85 PathProgramCache]: Analyzing trace with hash 1961506894, now seen corresponding path program 1 times [2024-10-31 15:03:06,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:03:06,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [341011676] [2024-10-31 15:03:06,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:03:06,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:03:07,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:03:07,380 INFO L255 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-31 15:03:07,382 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:03:07,573 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 15:03:07,574 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:03:07,780 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 15:03:07,780 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:03:07,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [341011676] [2024-10-31 15:03:07,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [341011676] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 15:03:07,780 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 15:03:07,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 15 [2024-10-31 15:03:07,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037302031] [2024-10-31 15:03:07,781 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 15:03:07,781 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-31 15:03:07,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:03:07,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-31 15:03:07,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2024-10-31 15:03:07,782 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) [2024-10-31 15:03:08,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:03:08,437 INFO L93 Difference]: Finished difference Result 675 states and 825 transitions. [2024-10-31 15:03:08,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-10-31 15:03:08,438 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 [2024-10-31 15:03:08,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:03:08,440 INFO L225 Difference]: With dead ends: 675 [2024-10-31 15:03:08,440 INFO L226 Difference]: Without dead ends: 417 [2024-10-31 15:03:08,441 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 [2024-10-31 15:03:08,442 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 [2024-10-31 15:03:08,442 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] [2024-10-31 15:03:08,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2024-10-31 15:03:08,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 380. [2024-10-31 15:03:08,457 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) [2024-10-31 15:03:08,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 456 transitions. [2024-10-31 15:03:08,458 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 456 transitions. Word has length 44 [2024-10-31 15:03:08,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:03:08,458 INFO L471 AbstractCegarLoop]: Abstraction has 380 states and 456 transitions. [2024-10-31 15:03:08,459 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) [2024-10-31 15:03:08,459 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 456 transitions. [2024-10-31 15:03:08,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-10-31 15:03:08,459 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:03:08,459 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] [2024-10-31 15:03:08,460 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-10-31 15:03:08,460 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:03:08,460 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:03:08,460 INFO L85 PathProgramCache]: Analyzing trace with hash 1294214785, now seen corresponding path program 1 times [2024-10-31 15:03:08,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:03:08,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [690573813] [2024-10-31 15:03:08,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:03:08,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:03:08,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:03:08,650 INFO L255 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-31 15:03:08,653 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:03:08,687 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 32 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-31 15:03:08,687 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:03:08,728 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 32 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-31 15:03:08,728 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:03:08,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [690573813] [2024-10-31 15:03:08,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [690573813] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 15:03:08,728 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 15:03:08,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2024-10-31 15:03:08,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527147477] [2024-10-31 15:03:08,729 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 15:03:08,729 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-31 15:03:08,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:03:08,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-31 15:03:08,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-10-31 15:03:08,730 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) [2024-10-31 15:03:08,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:03:08,874 INFO L93 Difference]: Finished difference Result 759 states and 916 transitions. [2024-10-31 15:03:08,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-31 15:03:08,875 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 [2024-10-31 15:03:08,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:03:08,877 INFO L225 Difference]: With dead ends: 759 [2024-10-31 15:03:08,877 INFO L226 Difference]: Without dead ends: 402 [2024-10-31 15:03:08,877 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 [2024-10-31 15:03:08,878 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 [2024-10-31 15:03:08,878 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] [2024-10-31 15:03:08,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2024-10-31 15:03:08,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 394. [2024-10-31 15:03:08,894 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) [2024-10-31 15:03:08,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 465 transitions. [2024-10-31 15:03:08,895 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 465 transitions. Word has length 60 [2024-10-31 15:03:08,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:03:08,895 INFO L471 AbstractCegarLoop]: Abstraction has 394 states and 465 transitions. [2024-10-31 15:03:08,895 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) [2024-10-31 15:03:08,895 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 465 transitions. [2024-10-31 15:03:08,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-10-31 15:03:08,896 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:03:08,896 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] [2024-10-31 15:03:08,896 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-10-31 15:03:08,896 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:03:08,897 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:03:08,897 INFO L85 PathProgramCache]: Analyzing trace with hash 1493994486, now seen corresponding path program 1 times [2024-10-31 15:03:08,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:03:08,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [62101642] [2024-10-31 15:03:08,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:03:08,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:03:09,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:03:09,085 INFO L255 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-31 15:03:09,086 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:03:09,180 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 62 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-10-31 15:03:09,180 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:03:09,274 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 47 proven. 21 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-10-31 15:03:09,275 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:03:09,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [62101642] [2024-10-31 15:03:09,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [62101642] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 15:03:09,275 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 15:03:09,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2024-10-31 15:03:09,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725511422] [2024-10-31 15:03:09,275 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 15:03:09,276 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-31 15:03:09,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:03:09,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-31 15:03:09,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-10-31 15:03:09,276 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) [2024-10-31 15:03:09,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:03:09,505 INFO L93 Difference]: Finished difference Result 1061 states and 1245 transitions. [2024-10-31 15:03:09,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-31 15:03:09,508 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 [2024-10-31 15:03:09,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:03:09,511 INFO L225 Difference]: With dead ends: 1061 [2024-10-31 15:03:09,511 INFO L226 Difference]: Without dead ends: 690 [2024-10-31 15:03:09,512 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 [2024-10-31 15:03:09,512 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 [2024-10-31 15:03:09,513 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] [2024-10-31 15:03:09,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2024-10-31 15:03:09,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 525. [2024-10-31 15:03:09,545 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) [2024-10-31 15:03:09,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 618 transitions. [2024-10-31 15:03:09,547 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 618 transitions. Word has length 70 [2024-10-31 15:03:09,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:03:09,547 INFO L471 AbstractCegarLoop]: Abstraction has 525 states and 618 transitions. [2024-10-31 15:03:09,547 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) [2024-10-31 15:03:09,548 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 618 transitions. [2024-10-31 15:03:09,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-10-31 15:03:09,550 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:03:09,550 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] [2024-10-31 15:03:09,550 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-10-31 15:03:09,550 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:03:09,551 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:03:09,551 INFO L85 PathProgramCache]: Analyzing trace with hash 1634543096, now seen corresponding path program 2 times [2024-10-31 15:03:09,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:03:09,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1716326516] [2024-10-31 15:03:09,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:03:09,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:03:13,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:03:13,522 INFO L255 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-31 15:03:13,525 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:03:13,674 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 53 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-10-31 15:03:13,675 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:03:13,895 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 47 proven. 29 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-31 15:03:13,895 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:03:13,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1716326516] [2024-10-31 15:03:13,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1716326516] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 15:03:13,895 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 15:03:13,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9] total 13 [2024-10-31 15:03:13,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654445828] [2024-10-31 15:03:13,896 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 15:03:13,896 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-31 15:03:13,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:03:13,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-31 15:03:13,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2024-10-31 15:03:13,897 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) [2024-10-31 15:03:14,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:03:14,262 INFO L93 Difference]: Finished difference Result 869 states and 996 transitions. [2024-10-31 15:03:14,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-31 15:03:14,262 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 [2024-10-31 15:03:14,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:03:14,265 INFO L225 Difference]: With dead ends: 869 [2024-10-31 15:03:14,266 INFO L226 Difference]: Without dead ends: 753 [2024-10-31 15:03:14,266 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 [2024-10-31 15:03:14,267 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 [2024-10-31 15:03:14,267 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] [2024-10-31 15:03:14,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 753 states. [2024-10-31 15:03:14,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 753 to 515. [2024-10-31 15:03:14,295 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) [2024-10-31 15:03:14,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 606 transitions. [2024-10-31 15:03:14,297 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 606 transitions. Word has length 70 [2024-10-31 15:03:14,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:03:14,297 INFO L471 AbstractCegarLoop]: Abstraction has 515 states and 606 transitions. [2024-10-31 15:03:14,297 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) [2024-10-31 15:03:14,297 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 606 transitions. [2024-10-31 15:03:14,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-10-31 15:03:14,298 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:03:14,298 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] [2024-10-31 15:03:14,298 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-10-31 15:03:14,298 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:03:14,299 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:03:14,299 INFO L85 PathProgramCache]: Analyzing trace with hash 605183798, now seen corresponding path program 3 times [2024-10-31 15:03:14,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:03:14,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [921811052] [2024-10-31 15:03:14,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:03:14,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:03:21,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:03:21,312 INFO L255 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-10-31 15:03:21,315 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:03:23,690 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 15:03:23,691 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:03:25,759 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 15:03:25,759 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:03:25,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [921811052] [2024-10-31 15:03:25,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [921811052] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 15:03:25,759 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 15:03:25,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 47 [2024-10-31 15:03:25,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419620271] [2024-10-31 15:03:25,760 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 15:03:25,760 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-10-31 15:03:25,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:03:25,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-10-31 15:03:25,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1999, Unknown=0, NotChecked=0, Total=2162 [2024-10-31 15:03:25,762 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) [2024-10-31 15:03:37,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:03:37,545 INFO L93 Difference]: Finished difference Result 1105 states and 1277 transitions. [2024-10-31 15:03:37,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2024-10-31 15:03:37,546 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 [2024-10-31 15:03:37,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:03:37,549 INFO L225 Difference]: With dead ends: 1105 [2024-10-31 15:03:37,549 INFO L226 Difference]: Without dead ends: 775 [2024-10-31 15:03:37,554 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3255 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=2601, Invalid=13655, Unknown=0, NotChecked=0, Total=16256 [2024-10-31 15:03:37,554 INFO L432 NwaCegarLoop]: 248 mSDtfsCounter, 1661 mSDsluCounter, 4248 mSDsCounter, 0 mSdLazyCounter, 4396 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s 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 [2024-10-31 15:03:37,554 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] [2024-10-31 15:03:37,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 775 states. [2024-10-31 15:03:37,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 775 to 561. [2024-10-31 15:03:37,608 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) [2024-10-31 15:03:37,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 561 states to 561 states and 655 transitions. [2024-10-31 15:03:37,610 INFO L78 Accepts]: Start accepts. Automaton has 561 states and 655 transitions. Word has length 70 [2024-10-31 15:03:37,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:03:37,610 INFO L471 AbstractCegarLoop]: Abstraction has 561 states and 655 transitions. [2024-10-31 15:03:37,610 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) [2024-10-31 15:03:37,610 INFO L276 IsEmpty]: Start isEmpty. Operand 561 states and 655 transitions. [2024-10-31 15:03:37,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-10-31 15:03:37,611 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:03:37,611 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] [2024-10-31 15:03:37,611 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-10-31 15:03:37,611 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:03:37,612 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:03:37,612 INFO L85 PathProgramCache]: Analyzing trace with hash -1235371034, now seen corresponding path program 1 times [2024-10-31 15:03:37,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:03:37,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2037643421] [2024-10-31 15:03:37,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:03:37,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:03:53,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:03:53,869 INFO L255 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-10-31 15:03:53,872 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:03:56,381 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 15:03:56,382 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:03:59,137 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 15:03:59,137 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:03:59,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2037643421] [2024-10-31 15:03:59,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [2037643421] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 15:03:59,138 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 15:03:59,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26] total 49 [2024-10-31 15:03:59,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912592399] [2024-10-31 15:03:59,138 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 15:03:59,140 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-10-31 15:03:59,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:03:59,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-10-31 15:03:59,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=2180, Unknown=0, NotChecked=0, Total=2352 [2024-10-31 15:03:59,144 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)