/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --cacsl2boogietranslator.allow.undefined.functions true --traceabstraction.smt.solver Internal_SMTInterpol -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Bitvector.epf -i ../../../trunk/examples/svcomp/bitvector/s3_srvr_2a.BV.c.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.5-dev-356b6ba-m [2024-10-31 15:04:11,196 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-31 15:04:11,252 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Bitvector.epf [2024-10-31 15:04:11,281 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-31 15:04:11,282 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-31 15:04:11,283 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-31 15:04:11,283 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-31 15:04:11,284 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-31 15:04:11,284 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-31 15:04:11,285 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-31 15:04:11,285 INFO L153 SettingsManager]: * Use SBE=true [2024-10-31 15:04:11,285 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-31 15:04:11,285 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-31 15:04:11,285 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-31 15:04:11,286 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-31 15:04:11,286 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-31 15:04:11,286 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-31 15:04:11,286 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-31 15:04:11,287 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-31 15:04:11,287 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-31 15:04:11,290 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-10-31 15:04:11,291 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-31 15:04:11,291 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-10-31 15:04:11,291 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-31 15:04:11,291 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-31 15:04:11,291 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-31 15:04:11,292 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-31 15:04:11,292 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-31 15:04:11,292 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-31 15:04:11,292 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-31 15:04:11,292 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 15:04:11,292 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-31 15:04:11,293 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-31 15:04:11,293 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-31 15:04:11,293 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2024-10-31 15:04:11,293 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-10-31 15:04:11,293 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-31 15:04:11,293 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-31 15:04:11,294 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-31 15:04:11,294 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-31 15:04:11,294 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2024-10-31 15:04:11,295 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Allow undefined functions -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol [2024-10-31 15:04:11,535 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-31 15:04:11,551 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-31 15:04:11,553 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-31 15:04:11,554 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-31 15:04:11,554 INFO L274 PluginConnector]: CDTParser initialized [2024-10-31 15:04:11,555 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/s3_srvr_2a.BV.c.cil.c [2024-10-31 15:04:12,807 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-31 15:04:12,959 INFO L384 CDTParser]: Found 1 translation units. [2024-10-31 15:04:12,960 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/bitvector/s3_srvr_2a.BV.c.cil.c [2024-10-31 15:04:12,973 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e09b9e428/3fb94da74cee49ce814f83fbe857c9d0/FLAGb6bdea135 [2024-10-31 15:04:12,988 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e09b9e428/3fb94da74cee49ce814f83fbe857c9d0 [2024-10-31 15:04:12,990 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-31 15:04:12,991 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-10-31 15:04:12,992 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-31 15:04:12,992 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-31 15:04:12,997 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-31 15:04:12,997 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 03:04:12" (1/1) ... [2024-10-31 15:04:12,998 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d444c86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 03:04:12, skipping insertion in model container [2024-10-31 15:04:12,998 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 03:04:12" (1/1) ... [2024-10-31 15:04:13,036 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-31 15:04:13,249 WARN L251 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/bitvector/s3_srvr_2a.BV.c.cil.c[44872,44885] [2024-10-31 15:04:13,257 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 15:04:13,269 INFO L200 MainTranslator]: Completed pre-run [2024-10-31 15:04:13,320 WARN L251 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/bitvector/s3_srvr_2a.BV.c.cil.c[44872,44885] [2024-10-31 15:04:13,322 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 15:04:13,339 INFO L204 MainTranslator]: Completed translation [2024-10-31 15:04:13,343 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 03:04:13 WrapperNode [2024-10-31 15:04:13,343 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-31 15:04:13,344 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-31 15:04:13,344 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-31 15:04:13,344 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-31 15:04:13,349 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 03:04:13" (1/1) ... [2024-10-31 15:04:13,356 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 03:04:13" (1/1) ... [2024-10-31 15:04:13,379 INFO L138 Inliner]: procedures = 15, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 525 [2024-10-31 15:04:13,380 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-31 15:04:13,380 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-31 15:04:13,380 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-31 15:04:13,380 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-31 15:04:13,387 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 03:04:13" (1/1) ... [2024-10-31 15:04:13,387 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 03:04:13" (1/1) ... [2024-10-31 15:04:13,390 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 03:04:13" (1/1) ... [2024-10-31 15:04:13,399 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-10-31 15:04:13,399 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 03:04:13" (1/1) ... [2024-10-31 15:04:13,399 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 03:04:13" (1/1) ... [2024-10-31 15:04:13,403 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 03:04:13" (1/1) ... [2024-10-31 15:04:13,407 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 03:04:13" (1/1) ... [2024-10-31 15:04:13,408 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 03:04:13" (1/1) ... [2024-10-31 15:04:13,409 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 03:04:13" (1/1) ... [2024-10-31 15:04:13,411 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-31 15:04:13,412 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-31 15:04:13,412 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-31 15:04:13,412 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-31 15:04:13,412 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 03:04:13" (1/1) ... [2024-10-31 15:04:13,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 15:04:13,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-31 15:04:13,437 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-31 15:04:13,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-31 15:04:13,455 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-31 15:04:13,455 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-10-31 15:04:13,455 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-31 15:04:13,455 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-31 15:04:13,536 INFO L238 CfgBuilder]: Building ICFG [2024-10-31 15:04:13,538 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-31 15:04:13,551 WARN L781 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2024-10-31 15:04:13,909 INFO L735 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2024-10-31 15:04:13,909 INFO L735 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2024-10-31 15:04:13,950 INFO L? ?]: Removed 118 outVars from TransFormulas that were not future-live. [2024-10-31 15:04:13,950 INFO L287 CfgBuilder]: Performing block encoding [2024-10-31 15:04:13,966 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-31 15:04:13,966 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-10-31 15:04:13,966 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 03:04:13 BoogieIcfgContainer [2024-10-31 15:04:13,966 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-31 15:04:13,969 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-31 15:04:13,969 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-31 15:04:13,972 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-31 15:04:13,972 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.10 03:04:12" (1/3) ... [2024-10-31 15:04:13,972 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f6b7e2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 03:04:13, skipping insertion in model container [2024-10-31 15:04:13,972 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 03:04:13" (2/3) ... [2024-10-31 15:04:13,973 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f6b7e2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 03:04:13, skipping insertion in model container [2024-10-31 15:04:13,973 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 03:04:13" (3/3) ... [2024-10-31 15:04:13,974 INFO L112 eAbstractionObserver]: Analyzing ICFG s3_srvr_2a.BV.c.cil.c [2024-10-31 15:04:13,986 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-31 15:04:13,987 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-31 15:04:14,040 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-31 15:04:14,044 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;@4157bc1c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-31 15:04:14,045 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-31 15:04:14,048 INFO L276 IsEmpty]: Start isEmpty. Operand has 138 states, 136 states have (on average 1.7426470588235294) internal successors, (237), 137 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 15:04:14,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-10-31 15:04:14,057 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:04:14,058 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 15:04:14,058 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:04:14,062 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:04:14,062 INFO L85 PathProgramCache]: Analyzing trace with hash 1632002022, now seen corresponding path program 1 times [2024-10-31 15:04:14,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:04:14,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1168964375] [2024-10-31 15:04:14,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:04:14,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:04:14,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:04:14,243 INFO L255 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-31 15:04:14,250 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:04:14,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 15:04:14,335 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:04:14,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 15:04:14,375 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:04:14,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1168964375] [2024-10-31 15:04:14,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1168964375] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 15:04:14,376 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 15:04:14,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2024-10-31 15:04:14,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886514984] [2024-10-31 15:04:14,378 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 15:04:14,382 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 15:04:14,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:04:14,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 15:04:14,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 15:04:14,402 INFO L87 Difference]: Start difference. First operand has 138 states, 136 states have (on average 1.7426470588235294) internal successors, (237), 137 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 15:04:14,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:04:14,555 INFO L93 Difference]: Finished difference Result 275 states and 473 transitions. [2024-10-31 15:04:14,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 15:04:14,557 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2024-10-31 15:04:14,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:04:14,563 INFO L225 Difference]: With dead ends: 275 [2024-10-31 15:04:14,563 INFO L226 Difference]: Without dead ends: 125 [2024-10-31 15:04:14,566 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 15:04:14,570 INFO L432 NwaCegarLoop]: 211 mSDtfsCounter, 8 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 15:04:14,571 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 325 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 15:04:14,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2024-10-31 15:04:14,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2024-10-31 15:04:14,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.4919354838709677) internal successors, (185), 124 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 15:04:14,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 185 transitions. [2024-10-31 15:04:14,603 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 185 transitions. Word has length 44 [2024-10-31 15:04:14,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:04:14,604 INFO L471 AbstractCegarLoop]: Abstraction has 125 states and 185 transitions. [2024-10-31 15:04:14,604 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 15:04:14,604 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 185 transitions. [2024-10-31 15:04:14,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-10-31 15:04:14,606 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:04:14,606 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 15:04:14,606 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-31 15:04:14,606 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:04:14,607 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:04:14,607 INFO L85 PathProgramCache]: Analyzing trace with hash 2033157093, now seen corresponding path program 1 times [2024-10-31 15:04:14,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:04:14,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1519849811] [2024-10-31 15:04:14,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:04:14,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:04:14,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:04:14,698 INFO L255 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-31 15:04:14,700 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:04:14,778 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 15:04:14,778 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:04:14,835 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 15:04:14,835 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:04:14,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1519849811] [2024-10-31 15:04:14,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1519849811] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 15:04:14,836 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 15:04:14,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2024-10-31 15:04:14,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076838279] [2024-10-31 15:04:14,836 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 15:04:14,837 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 15:04:14,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:04:14,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 15:04:14,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-31 15:04:14,838 INFO L87 Difference]: Start difference. First operand 125 states and 185 transitions. Second operand has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 15:04:14,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:04:14,888 INFO L93 Difference]: Finished difference Result 432 states and 659 transitions. [2024-10-31 15:04:14,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 15:04:14,888 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2024-10-31 15:04:14,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:04:14,891 INFO L225 Difference]: With dead ends: 432 [2024-10-31 15:04:14,891 INFO L226 Difference]: Without dead ends: 326 [2024-10-31 15:04:14,891 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-31 15:04:14,892 INFO L432 NwaCegarLoop]: 177 mSDtfsCounter, 346 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 346 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 15:04:14,892 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [346 Valid, 487 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 15:04:14,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2024-10-31 15:04:14,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 326. [2024-10-31 15:04:14,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 1.5138461538461538) internal successors, (492), 325 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 15:04:14,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 492 transitions. [2024-10-31 15:04:14,916 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 492 transitions. Word has length 60 [2024-10-31 15:04:14,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:04:14,917 INFO L471 AbstractCegarLoop]: Abstraction has 326 states and 492 transitions. [2024-10-31 15:04:14,917 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 15:04:14,917 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 492 transitions. [2024-10-31 15:04:14,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2024-10-31 15:04:14,922 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:04:14,923 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 15:04:14,923 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-31 15:04:14,923 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:04:14,923 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:04:14,923 INFO L85 PathProgramCache]: Analyzing trace with hash -1976048908, now seen corresponding path program 1 times [2024-10-31 15:04:14,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:04:14,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [60335694] [2024-10-31 15:04:14,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:04:14,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:04:14,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:04:14,974 INFO L255 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-31 15:04:14,977 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:04:15,003 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-31 15:04:15,004 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:04:15,040 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-31 15:04:15,040 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:04:15,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [60335694] [2024-10-31 15:04:15,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [60335694] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 15:04:15,041 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 15:04:15,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2024-10-31 15:04:15,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218568581] [2024-10-31 15:04:15,041 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 15:04:15,042 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 15:04:15,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:04:15,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 15:04:15,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 15:04:15,043 INFO L87 Difference]: Start difference. First operand 326 states and 492 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 15:04:15,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:04:15,065 INFO L93 Difference]: Finished difference Result 635 states and 964 transitions. [2024-10-31 15:04:15,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 15:04:15,066 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2024-10-31 15:04:15,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:04:15,067 INFO L225 Difference]: With dead ends: 635 [2024-10-31 15:04:15,067 INFO L226 Difference]: Without dead ends: 328 [2024-10-31 15:04:15,068 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 15:04:15,071 INFO L432 NwaCegarLoop]: 173 mSDtfsCounter, 6 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 15:04:15,072 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 326 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 15:04:15,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2024-10-31 15:04:15,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 328. [2024-10-31 15:04:15,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 1.510703363914373) internal successors, (494), 327 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 15:04:15,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 494 transitions. [2024-10-31 15:04:15,091 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 494 transitions. Word has length 82 [2024-10-31 15:04:15,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:04:15,092 INFO L471 AbstractCegarLoop]: Abstraction has 328 states and 494 transitions. [2024-10-31 15:04:15,092 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 15:04:15,092 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 494 transitions. [2024-10-31 15:04:15,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2024-10-31 15:04:15,097 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:04:15,097 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 15:04:15,097 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-31 15:04:15,098 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:04:15,098 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:04:15,098 INFO L85 PathProgramCache]: Analyzing trace with hash -1614320406, now seen corresponding path program 1 times [2024-10-31 15:04:15,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:04:15,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1531449784] [2024-10-31 15:04:15,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:04:15,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:04:15,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:04:15,149 INFO L255 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-31 15:04:15,151 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:04:15,180 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-10-31 15:04:15,180 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:04:15,233 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 58 proven. 17 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-10-31 15:04:15,233 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:04:15,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1531449784] [2024-10-31 15:04:15,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1531449784] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-31 15:04:15,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-31 15:04:15,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2024-10-31 15:04:15,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099197047] [2024-10-31 15:04:15,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 15:04:15,234 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 15:04:15,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:04:15,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 15:04:15,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-31 15:04:15,235 INFO L87 Difference]: Start difference. First operand 328 states and 494 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 15:04:15,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:04:15,386 INFO L93 Difference]: Finished difference Result 760 states and 1181 transitions. [2024-10-31 15:04:15,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 15:04:15,386 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2024-10-31 15:04:15,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:04:15,388 INFO L225 Difference]: With dead ends: 760 [2024-10-31 15:04:15,388 INFO L226 Difference]: Without dead ends: 453 [2024-10-31 15:04:15,389 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-31 15:04:15,392 INFO L432 NwaCegarLoop]: 185 mSDtfsCounter, 29 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 15:04:15,393 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 272 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 15:04:15,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2024-10-31 15:04:15,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 453. [2024-10-31 15:04:15,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 452 states have (on average 1.4026548672566372) internal successors, (634), 452 states have internal predecessors, (634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 15:04:15,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 634 transitions. [2024-10-31 15:04:15,408 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 634 transitions. Word has length 103 [2024-10-31 15:04:15,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:04:15,408 INFO L471 AbstractCegarLoop]: Abstraction has 453 states and 634 transitions. [2024-10-31 15:04:15,408 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 15:04:15,409 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 634 transitions. [2024-10-31 15:04:15,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2024-10-31 15:04:15,411 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:04:15,411 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 15:04:15,411 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-31 15:04:15,411 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:04:15,411 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:04:15,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1420566810, now seen corresponding path program 1 times [2024-10-31 15:04:15,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:04:15,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [111931589] [2024-10-31 15:04:15,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:04:15,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:04:15,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:04:15,443 INFO L255 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-31 15:04:15,444 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:04:15,474 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-10-31 15:04:15,475 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:04:15,518 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 58 proven. 17 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-10-31 15:04:15,518 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:04:15,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [111931589] [2024-10-31 15:04:15,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [111931589] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-31 15:04:15,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-31 15:04:15,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2024-10-31 15:04:15,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727576536] [2024-10-31 15:04:15,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 15:04:15,523 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 15:04:15,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:04:15,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 15:04:15,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-31 15:04:15,524 INFO L87 Difference]: Start difference. First operand 453 states and 634 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 15:04:15,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:04:15,646 INFO L93 Difference]: Finished difference Result 931 states and 1317 transitions. [2024-10-31 15:04:15,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 15:04:15,647 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2024-10-31 15:04:15,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:04:15,650 INFO L225 Difference]: With dead ends: 931 [2024-10-31 15:04:15,650 INFO L226 Difference]: Without dead ends: 499 [2024-10-31 15:04:15,651 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-31 15:04:15,651 INFO L432 NwaCegarLoop]: 186 mSDtfsCounter, 11 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 15:04:15,652 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 273 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 15:04:15,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2024-10-31 15:04:15,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 499. [2024-10-31 15:04:15,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 498 states have (on average 1.3855421686746987) internal successors, (690), 498 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 15:04:15,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 690 transitions. [2024-10-31 15:04:15,665 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 690 transitions. Word has length 103 [2024-10-31 15:04:15,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:04:15,666 INFO L471 AbstractCegarLoop]: Abstraction has 499 states and 690 transitions. [2024-10-31 15:04:15,666 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 15:04:15,666 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 690 transitions. [2024-10-31 15:04:15,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2024-10-31 15:04:15,667 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:04:15,667 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 15:04:15,667 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-31 15:04:15,667 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:04:15,668 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:04:15,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1506722242, now seen corresponding path program 1 times [2024-10-31 15:04:15,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:04:15,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1975831598] [2024-10-31 15:04:15,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:04:15,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:04:15,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:04:15,715 INFO L255 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-31 15:04:15,718 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:04:15,789 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 183 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-10-31 15:04:15,789 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:04:15,843 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 183 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-10-31 15:04:15,844 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:04:15,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1975831598] [2024-10-31 15:04:15,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1975831598] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 15:04:15,844 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 15:04:15,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2024-10-31 15:04:15,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855073176] [2024-10-31 15:04:15,844 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 15:04:15,845 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 15:04:15,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:04:15,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 15:04:15,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-31 15:04:15,849 INFO L87 Difference]: Start difference. First operand 499 states and 690 transitions. Second operand has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 15:04:15,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:04:15,885 INFO L93 Difference]: Finished difference Result 1286 states and 1790 transitions. [2024-10-31 15:04:15,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 15:04:15,886 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 143 [2024-10-31 15:04:15,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:04:15,888 INFO L225 Difference]: With dead ends: 1286 [2024-10-31 15:04:15,888 INFO L226 Difference]: Without dead ends: 808 [2024-10-31 15:04:15,890 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 282 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-31 15:04:15,892 INFO L432 NwaCegarLoop]: 310 mSDtfsCounter, 268 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 620 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 15:04:15,893 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [268 Valid, 620 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 15:04:15,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 808 states. [2024-10-31 15:04:15,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 808 to 808. [2024-10-31 15:04:15,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 808 states, 807 states have (on average 1.3866171003717471) internal successors, (1119), 807 states have internal predecessors, (1119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 15:04:15,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 808 states to 808 states and 1119 transitions. [2024-10-31 15:04:15,909 INFO L78 Accepts]: Start accepts. Automaton has 808 states and 1119 transitions. Word has length 143 [2024-10-31 15:04:15,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:04:15,909 INFO L471 AbstractCegarLoop]: Abstraction has 808 states and 1119 transitions. [2024-10-31 15:04:15,909 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 15:04:15,910 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states and 1119 transitions. [2024-10-31 15:04:15,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2024-10-31 15:04:15,913 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:04:15,913 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 15:04:15,913 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-31 15:04:15,913 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:04:15,913 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:04:15,913 INFO L85 PathProgramCache]: Analyzing trace with hash 778746127, now seen corresponding path program 1 times [2024-10-31 15:04:15,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:04:15,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [252676997] [2024-10-31 15:04:15,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:04:15,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:04:15,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:04:15,955 INFO L255 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-31 15:04:15,958 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:04:16,042 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 198 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-10-31 15:04:16,043 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:04:16,122 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 198 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-10-31 15:04:16,123 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:04:16,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [252676997] [2024-10-31 15:04:16,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [252676997] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 15:04:16,123 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 15:04:16,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2024-10-31 15:04:16,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591154915] [2024-10-31 15:04:16,123 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 15:04:16,124 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 15:04:16,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:04:16,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 15:04:16,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 15:04:16,125 INFO L87 Difference]: Start difference. First operand 808 states and 1119 transitions. Second operand has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 15:04:16,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:04:16,148 INFO L93 Difference]: Finished difference Result 2217 states and 3117 transitions. [2024-10-31 15:04:16,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 15:04:16,148 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 163 [2024-10-31 15:04:16,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:04:16,153 INFO L225 Difference]: With dead ends: 2217 [2024-10-31 15:04:16,153 INFO L226 Difference]: Without dead ends: 1430 [2024-10-31 15:04:16,154 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 323 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 15:04:16,155 INFO L432 NwaCegarLoop]: 324 mSDtfsCounter, 110 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 491 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 15:04:16,155 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 491 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 15:04:16,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1430 states. [2024-10-31 15:04:16,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1430 to 1428. [2024-10-31 15:04:16,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1428 states, 1427 states have (on average 1.4085494043447793) internal successors, (2010), 1427 states have internal predecessors, (2010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 15:04:16,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1428 states to 1428 states and 2010 transitions. [2024-10-31 15:04:16,181 INFO L78 Accepts]: Start accepts. Automaton has 1428 states and 2010 transitions. Word has length 163 [2024-10-31 15:04:16,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:04:16,182 INFO L471 AbstractCegarLoop]: Abstraction has 1428 states and 2010 transitions. [2024-10-31 15:04:16,182 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 15:04:16,182 INFO L276 IsEmpty]: Start isEmpty. Operand 1428 states and 2010 transitions. [2024-10-31 15:04:16,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2024-10-31 15:04:16,184 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:04:16,184 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 15:04:16,184 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-10-31 15:04:16,184 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:04:16,185 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:04:16,185 INFO L85 PathProgramCache]: Analyzing trace with hash 1067369758, now seen corresponding path program 1 times [2024-10-31 15:04:16,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:04:16,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [417819864] [2024-10-31 15:04:16,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:04:16,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:04:16,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:04:16,225 INFO L255 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-31 15:04:16,227 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:04:16,253 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 209 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2024-10-31 15:04:16,254 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:04:16,298 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 192 proven. 33 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2024-10-31 15:04:16,299 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:04:16,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [417819864] [2024-10-31 15:04:16,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [417819864] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-31 15:04:16,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-31 15:04:16,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2024-10-31 15:04:16,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502577271] [2024-10-31 15:04:16,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 15:04:16,299 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 15:04:16,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:04:16,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 15:04:16,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-31 15:04:16,300 INFO L87 Difference]: Start difference. First operand 1428 states and 2010 transitions. Second operand has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 15:04:16,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:04:16,428 INFO L93 Difference]: Finished difference Result 3171 states and 4595 transitions. [2024-10-31 15:04:16,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 15:04:16,428 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 183 [2024-10-31 15:04:16,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:04:16,433 INFO L225 Difference]: With dead ends: 3171 [2024-10-31 15:04:16,433 INFO L226 Difference]: Without dead ends: 1764 [2024-10-31 15:04:16,435 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 361 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-31 15:04:16,435 INFO L432 NwaCegarLoop]: 185 mSDtfsCounter, 30 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 15:04:16,435 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 271 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 15:04:16,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1764 states. [2024-10-31 15:04:16,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1764 to 1764. [2024-10-31 15:04:16,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1764 states, 1763 states have (on average 1.3533749290981283) internal successors, (2386), 1763 states have internal predecessors, (2386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 15:04:16,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1764 states to 1764 states and 2386 transitions. [2024-10-31 15:04:16,462 INFO L78 Accepts]: Start accepts. Automaton has 1764 states and 2386 transitions. Word has length 183 [2024-10-31 15:04:16,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:04:16,464 INFO L471 AbstractCegarLoop]: Abstraction has 1764 states and 2386 transitions. [2024-10-31 15:04:16,464 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 15:04:16,464 INFO L276 IsEmpty]: Start isEmpty. Operand 1764 states and 2386 transitions. [2024-10-31 15:04:16,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2024-10-31 15:04:16,467 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:04:16,468 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 15:04:16,468 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-10-31 15:04:16,468 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:04:16,468 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:04:16,468 INFO L85 PathProgramCache]: Analyzing trace with hash -860101462, now seen corresponding path program 1 times [2024-10-31 15:04:16,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:04:16,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [628986653] [2024-10-31 15:04:16,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:04:16,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:04:16,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:04:16,540 INFO L255 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-31 15:04:16,542 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:04:18,776 WARN L873 $PredicateComparison]: unable to prove that (exists ((|ULTIMATE.start_ssl3_accept_~ag_X~0#1| (_ BitVec 32)) (|ULTIMATE.start_ssl3_accept_~ag_Y~0#1| (_ BitVec 32))) (= |c_ULTIMATE.start_ssl3_accept_~s__state~0#1| (bvadd (bvmul (_ bv2 32) |ULTIMATE.start_ssl3_accept_~ag_X~0#1|) (bvmul (_ bv2 32) |ULTIMATE.start_ssl3_accept_~ag_Y~0#1|)))) is different from true [2024-10-31 15:04:18,892 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 294 proven. 0 refuted. 32 times theorem prover too weak. 92 trivial. 16 not checked. [2024-10-31 15:04:18,892 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:04:18,924 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 299 proven. 0 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2024-10-31 15:04:18,924 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:04:18,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [628986653] [2024-10-31 15:04:18,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [628986653] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-31 15:04:18,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-31 15:04:18,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2024-10-31 15:04:18,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571775057] [2024-10-31 15:04:18,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 15:04:18,925 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 15:04:18,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:04:18,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 15:04:18,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=7, Unknown=1, NotChecked=4, Total=20 [2024-10-31 15:04:18,926 INFO L87 Difference]: Start difference. First operand 1764 states and 2386 transitions. Second operand has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 15:04:19,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:04:19,038 INFO L93 Difference]: Finished difference Result 3717 states and 5077 transitions. [2024-10-31 15:04:19,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 15:04:19,039 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 225 [2024-10-31 15:04:19,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:04:19,043 INFO L225 Difference]: With dead ends: 3717 [2024-10-31 15:04:19,043 INFO L226 Difference]: Without dead ends: 1974 [2024-10-31 15:04:19,045 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 448 GetRequests, 445 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=8, Invalid=7, Unknown=1, NotChecked=4, Total=20 [2024-10-31 15:04:19,046 INFO L432 NwaCegarLoop]: 131 mSDtfsCounter, 44 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 15:04:19,046 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 202 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 15:04:19,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1974 states. [2024-10-31 15:04:19,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1974 to 1974. [2024-10-31 15:04:19,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1974 states, 1973 states have (on average 1.3715154586923466) internal successors, (2706), 1973 states have internal predecessors, (2706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 15:04:19,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1974 states to 1974 states and 2706 transitions. [2024-10-31 15:04:19,074 INFO L78 Accepts]: Start accepts. Automaton has 1974 states and 2706 transitions. Word has length 225 [2024-10-31 15:04:19,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:04:19,075 INFO L471 AbstractCegarLoop]: Abstraction has 1974 states and 2706 transitions. [2024-10-31 15:04:19,075 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 15:04:19,075 INFO L276 IsEmpty]: Start isEmpty. Operand 1974 states and 2706 transitions. [2024-10-31 15:04:19,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2024-10-31 15:04:19,077 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:04:19,077 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 15:04:19,078 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-10-31 15:04:19,078 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:04:19,082 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:04:19,083 INFO L85 PathProgramCache]: Analyzing trace with hash -222886975, now seen corresponding path program 1 times [2024-10-31 15:04:19,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:04:19,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1480755747] [2024-10-31 15:04:19,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:04:19,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:04:19,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:04:19,115 INFO L255 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-31 15:04:19,117 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:04:19,151 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 303 proven. 9 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2024-10-31 15:04:19,151 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:04:19,174 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 303 proven. 0 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2024-10-31 15:04:19,175 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:04:19,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1480755747] [2024-10-31 15:04:19,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1480755747] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-31 15:04:19,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-31 15:04:19,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2024-10-31 15:04:19,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911964410] [2024-10-31 15:04:19,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 15:04:19,175 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 15:04:19,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:04:19,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 15:04:19,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-31 15:04:19,176 INFO L87 Difference]: Start difference. First operand 1974 states and 2706 transitions. Second operand has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 15:04:19,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:04:19,274 INFO L93 Difference]: Finished difference Result 4147 states and 5737 transitions. [2024-10-31 15:04:19,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 15:04:19,275 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 226 [2024-10-31 15:04:19,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:04:19,280 INFO L225 Difference]: With dead ends: 4147 [2024-10-31 15:04:19,280 INFO L226 Difference]: Without dead ends: 2194 [2024-10-31 15:04:19,282 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 450 GetRequests, 448 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-31 15:04:19,282 INFO L432 NwaCegarLoop]: 110 mSDtfsCounter, 44 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 15:04:19,282 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 181 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 15:04:19,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2194 states. [2024-10-31 15:04:19,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2194 to 2194. [2024-10-31 15:04:19,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2194 states, 2193 states have (on average 1.3889648882808938) internal successors, (3046), 2193 states have internal predecessors, (3046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 15:04:19,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2194 states to 2194 states and 3046 transitions. [2024-10-31 15:04:19,312 INFO L78 Accepts]: Start accepts. Automaton has 2194 states and 3046 transitions. Word has length 226 [2024-10-31 15:04:19,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:04:19,312 INFO L471 AbstractCegarLoop]: Abstraction has 2194 states and 3046 transitions. [2024-10-31 15:04:19,312 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 15:04:19,313 INFO L276 IsEmpty]: Start isEmpty. Operand 2194 states and 3046 transitions. [2024-10-31 15:04:19,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2024-10-31 15:04:19,315 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:04:19,316 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 15:04:19,316 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-10-31 15:04:19,316 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:04:19,316 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:04:19,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1252165159, now seen corresponding path program 1 times [2024-10-31 15:04:19,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:04:19,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [481740242] [2024-10-31 15:04:19,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:04:19,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:04:19,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:04:19,372 INFO L255 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-31 15:04:19,374 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:04:19,396 INFO L134 CoverageAnalysis]: Checked inductivity of 526 backedges. 359 proven. 0 refuted. 0 times theorem prover too weak. 167 trivial. 0 not checked. [2024-10-31 15:04:19,396 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:04:19,418 INFO L134 CoverageAnalysis]: Checked inductivity of 526 backedges. 359 proven. 0 refuted. 0 times theorem prover too weak. 167 trivial. 0 not checked. [2024-10-31 15:04:19,418 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:04:19,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [481740242] [2024-10-31 15:04:19,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [481740242] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 15:04:19,418 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 15:04:19,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2024-10-31 15:04:19,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670510629] [2024-10-31 15:04:19,419 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 15:04:19,419 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 15:04:19,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:04:19,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 15:04:19,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-31 15:04:19,420 INFO L87 Difference]: Start difference. First operand 2194 states and 3046 transitions. Second operand has 4 states, 4 states have (on average 37.25) internal successors, (149), 4 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 15:04:19,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:04:19,562 INFO L93 Difference]: Finished difference Result 4677 states and 6577 transitions. [2024-10-31 15:04:19,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 15:04:19,563 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.25) internal successors, (149), 4 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 241 [2024-10-31 15:04:19,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:04:19,568 INFO L225 Difference]: With dead ends: 4677 [2024-10-31 15:04:19,569 INFO L226 Difference]: Without dead ends: 2504 [2024-10-31 15:04:19,571 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 480 GetRequests, 478 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-31 15:04:19,571 INFO L432 NwaCegarLoop]: 136 mSDtfsCounter, 69 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 15:04:19,571 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 231 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 15:04:19,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2504 states. [2024-10-31 15:04:19,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2504 to 2504. [2024-10-31 15:04:19,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2504 states, 2503 states have (on average 1.3567718737514982) internal successors, (3396), 2503 states have internal predecessors, (3396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 15:04:19,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2504 states to 2504 states and 3396 transitions. [2024-10-31 15:04:19,606 INFO L78 Accepts]: Start accepts. Automaton has 2504 states and 3396 transitions. Word has length 241 [2024-10-31 15:04:19,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:04:19,607 INFO L471 AbstractCegarLoop]: Abstraction has 2504 states and 3396 transitions. [2024-10-31 15:04:19,607 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.25) internal successors, (149), 4 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 15:04:19,607 INFO L276 IsEmpty]: Start isEmpty. Operand 2504 states and 3396 transitions. [2024-10-31 15:04:19,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2024-10-31 15:04:19,610 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:04:19,610 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 15:04:19,610 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-10-31 15:04:19,610 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:04:19,611 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:04:19,611 INFO L85 PathProgramCache]: Analyzing trace with hash -482554043, now seen corresponding path program 1 times [2024-10-31 15:04:19,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:04:19,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [44084630] [2024-10-31 15:04:19,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:04:19,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:04:19,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:04:19,648 INFO L255 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-31 15:04:19,652 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:04:20,371 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 425 proven. 64 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2024-10-31 15:04:20,371 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:04:20,596 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 430 proven. 16 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2024-10-31 15:04:20,596 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:04:20,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [44084630] [2024-10-31 15:04:20,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [44084630] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 15:04:20,597 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 15:04:20,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2024-10-31 15:04:20,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423192836] [2024-10-31 15:04:20,597 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 15:04:20,597 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-31 15:04:20,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:04:20,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-31 15:04:20,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-10-31 15:04:20,598 INFO L87 Difference]: Start difference. First operand 2504 states and 3396 transitions. Second operand has 7 states, 7 states have (on average 31.857142857142858) internal successors, (223), 7 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 15:04:24,589 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.58s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-10-31 15:04:28,414 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.54s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-10-31 15:04:32,050 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.65s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-10-31 15:04:34,498 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.45s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-10-31 15:04:39,259 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.32s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-10-31 15:04:43,102 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.42s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-10-31 15:04:45,582 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.42s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-10-31 15:04:48,336 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.34s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-10-31 15:04:51,385 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.81s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-10-31 15:04:54,186 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.39s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-10-31 15:04:57,210 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.87s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-10-31 15:05:00,325 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.76s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-10-31 15:05:03,639 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.59s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-10-31 15:05:06,499 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.81s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-10-31 15:05:07,861 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-10-31 15:05:10,676 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.69s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-10-31 15:05:13,476 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.78s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-10-31 15:05:17,114 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.84s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-10-31 15:05:19,835 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.51s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-10-31 15:05:22,341 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.51s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-10-31 15:05:26,360 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.64s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-10-31 15:05:28,595 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-10-31 15:05:31,393 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.63s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-10-31 15:05:34,170 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.58s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-10-31 15:05:34,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:05:34,892 INFO L93 Difference]: Finished difference Result 8339 states and 11804 transitions. [2024-10-31 15:05:34,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-31 15:05:34,893 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 31.857142857142858) internal successors, (223), 7 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 253 [2024-10-31 15:05:34,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:05:34,906 INFO L225 Difference]: With dead ends: 8339 [2024-10-31 15:05:34,906 INFO L226 Difference]: Without dead ends: 5838 [2024-10-31 15:05:34,909 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 522 GetRequests, 508 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2024-10-31 15:05:34,909 INFO L432 NwaCegarLoop]: 315 mSDtfsCounter, 464 mSDsluCounter, 697 mSDsCounter, 0 mSdLazyCounter, 1104 mSolverCounterSat, 75 mSolverCounterUnsat, 21 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 73.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 464 SdHoareTripleChecker+Valid, 1012 SdHoareTripleChecker+Invalid, 1200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1104 IncrementalHoareTripleChecker+Invalid, 21 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 74.0s IncrementalHoareTripleChecker+Time [2024-10-31 15:05:34,909 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [464 Valid, 1012 Invalid, 1200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1104 Invalid, 21 Unknown, 0 Unchecked, 74.0s Time] [2024-10-31 15:05:34,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5838 states. [2024-10-31 15:05:34,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5838 to 4929. [2024-10-31 15:05:35,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4929 states, 4928 states have (on average 1.3601866883116882) internal successors, (6703), 4928 states have internal predecessors, (6703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 15:05:35,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4929 states to 4929 states and 6703 transitions. [2024-10-31 15:05:35,008 INFO L78 Accepts]: Start accepts. Automaton has 4929 states and 6703 transitions. Word has length 253 [2024-10-31 15:05:35,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:05:35,008 INFO L471 AbstractCegarLoop]: Abstraction has 4929 states and 6703 transitions. [2024-10-31 15:05:35,008 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 31.857142857142858) internal successors, (223), 7 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 15:05:35,008 INFO L276 IsEmpty]: Start isEmpty. Operand 4929 states and 6703 transitions. [2024-10-31 15:05:35,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2024-10-31 15:05:35,015 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:05:35,015 INFO L215 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 7, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 15:05:35,016 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-10-31 15:05:35,016 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:05:35,016 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:05:35,016 INFO L85 PathProgramCache]: Analyzing trace with hash -726629683, now seen corresponding path program 1 times [2024-10-31 15:05:35,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:05:35,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2086844109] [2024-10-31 15:05:35,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:05:35,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:05:35,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:05:35,040 INFO L255 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-31 15:05:35,042 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:05:35,070 INFO L134 CoverageAnalysis]: Checked inductivity of 658 backedges. 371 proven. 0 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2024-10-31 15:05:35,070 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:05:35,095 INFO L134 CoverageAnalysis]: Checked inductivity of 658 backedges. 371 proven. 0 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2024-10-31 15:05:35,096 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:05:35,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2086844109] [2024-10-31 15:05:35,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [2086844109] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 15:05:35,096 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 15:05:35,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2024-10-31 15:05:35,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354264911] [2024-10-31 15:05:35,096 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 15:05:35,096 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 15:05:35,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:05:35,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 15:05:35,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 15:05:35,098 INFO L87 Difference]: Start difference. First operand 4929 states and 6703 transitions. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 15:05:35,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:05:35,243 INFO L93 Difference]: Finished difference Result 10287 states and 14011 transitions. [2024-10-31 15:05:35,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 15:05:35,247 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 254 [2024-10-31 15:05:35,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:05:35,260 INFO L225 Difference]: With dead ends: 10287 [2024-10-31 15:05:35,260 INFO L226 Difference]: Without dead ends: 5379 [2024-10-31 15:05:35,264 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 506 GetRequests, 505 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 15:05:35,265 INFO L432 NwaCegarLoop]: 185 mSDtfsCounter, 9 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 15:05:35,265 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 272 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 15:05:35,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5379 states. [2024-10-31 15:05:35,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5379 to 5379. [2024-10-31 15:05:35,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5379 states, 5378 states have (on average 1.3467831907772405) internal successors, (7243), 5378 states have internal predecessors, (7243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 15:05:35,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5379 states to 5379 states and 7243 transitions. [2024-10-31 15:05:35,357 INFO L78 Accepts]: Start accepts. Automaton has 5379 states and 7243 transitions. Word has length 254 [2024-10-31 15:05:35,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:05:35,357 INFO L471 AbstractCegarLoop]: Abstraction has 5379 states and 7243 transitions. [2024-10-31 15:05:35,357 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 15:05:35,357 INFO L276 IsEmpty]: Start isEmpty. Operand 5379 states and 7243 transitions. [2024-10-31 15:05:35,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2024-10-31 15:05:35,365 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:05:35,366 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 8, 7, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 15:05:35,366 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-10-31 15:05:35,366 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:05:35,367 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:05:35,367 INFO L85 PathProgramCache]: Analyzing trace with hash 1268706312, now seen corresponding path program 1 times [2024-10-31 15:05:35,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:05:35,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1557416441] [2024-10-31 15:05:35,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:05:35,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:05:35,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:05:35,395 INFO L255 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-31 15:05:35,397 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:05:35,424 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 496 proven. 0 refuted. 0 times theorem prover too weak. 386 trivial. 0 not checked. [2024-10-31 15:05:35,425 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:05:35,451 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 496 proven. 0 refuted. 0 times theorem prover too weak. 386 trivial. 0 not checked. [2024-10-31 15:05:35,451 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:05:35,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1557416441] [2024-10-31 15:05:35,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1557416441] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 15:05:35,452 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 15:05:35,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2024-10-31 15:05:35,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467173257] [2024-10-31 15:05:35,452 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 15:05:35,452 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 15:05:35,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:05:35,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 15:05:35,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 15:05:35,453 INFO L87 Difference]: Start difference. First operand 5379 states and 7243 transitions. Second operand has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 15:05:35,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:05:35,614 INFO L93 Difference]: Finished difference Result 11223 states and 15145 transitions. [2024-10-31 15:05:35,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 15:05:35,614 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 300 [2024-10-31 15:05:35,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:05:35,636 INFO L225 Difference]: With dead ends: 11223 [2024-10-31 15:05:35,636 INFO L226 Difference]: Without dead ends: 5865 [2024-10-31 15:05:35,641 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 598 GetRequests, 597 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 15:05:35,641 INFO L432 NwaCegarLoop]: 185 mSDtfsCounter, 9 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 15:05:35,642 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 272 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 15:05:35,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5865 states. [2024-10-31 15:05:35,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5865 to 5865. [2024-10-31 15:05:35,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5865 states, 5864 states have (on average 1.3333901773533425) internal successors, (7819), 5864 states have internal predecessors, (7819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 15:05:35,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5865 states to 5865 states and 7819 transitions. [2024-10-31 15:05:35,734 INFO L78 Accepts]: Start accepts. Automaton has 5865 states and 7819 transitions. Word has length 300 [2024-10-31 15:05:35,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:05:35,734 INFO L471 AbstractCegarLoop]: Abstraction has 5865 states and 7819 transitions. [2024-10-31 15:05:35,735 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 15:05:35,735 INFO L276 IsEmpty]: Start isEmpty. Operand 5865 states and 7819 transitions. [2024-10-31 15:05:35,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2024-10-31 15:05:35,742 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:05:35,742 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 8, 8, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 15:05:35,742 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-10-31 15:05:35,742 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:05:35,742 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:05:35,742 INFO L85 PathProgramCache]: Analyzing trace with hash 1812513324, now seen corresponding path program 1 times [2024-10-31 15:05:35,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:05:35,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [872643729] [2024-10-31 15:05:35,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:05:35,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:05:35,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:05:35,770 INFO L255 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-31 15:05:35,773 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:05:35,796 INFO L134 CoverageAnalysis]: Checked inductivity of 908 backedges. 543 proven. 0 refuted. 0 times theorem prover too weak. 365 trivial. 0 not checked. [2024-10-31 15:05:35,796 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:05:35,818 INFO L134 CoverageAnalysis]: Checked inductivity of 908 backedges. 543 proven. 0 refuted. 0 times theorem prover too weak. 365 trivial. 0 not checked. [2024-10-31 15:05:35,818 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:05:35,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [872643729] [2024-10-31 15:05:35,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [872643729] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 15:05:35,819 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 15:05:35,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2024-10-31 15:05:35,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675671926] [2024-10-31 15:05:35,819 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 15:05:35,819 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 15:05:35,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:05:35,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 15:05:35,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-31 15:05:35,820 INFO L87 Difference]: Start difference. First operand 5865 states and 7819 transitions. Second operand has 4 states, 4 states have (on average 39.5) internal successors, (158), 4 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 15:05:36,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:05:36,004 INFO L93 Difference]: Finished difference Result 9538 states and 12831 transitions. [2024-10-31 15:05:36,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 15:05:36,004 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 39.5) internal successors, (158), 4 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 307 [2024-10-31 15:05:36,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:05:36,008 INFO L225 Difference]: With dead ends: 9538 [2024-10-31 15:05:36,008 INFO L226 Difference]: Without dead ends: 2446 [2024-10-31 15:05:36,013 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 612 GetRequests, 610 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-31 15:05:36,014 INFO L432 NwaCegarLoop]: 123 mSDtfsCounter, 81 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 15:05:36,014 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 281 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 15:05:36,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2446 states. [2024-10-31 15:05:36,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2446 to 2344. [2024-10-31 15:05:36,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2344 states, 2343 states have (on average 1.300469483568075) internal successors, (3047), 2343 states have internal predecessors, (3047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 15:05:36,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2344 states to 2344 states and 3047 transitions. [2024-10-31 15:05:36,075 INFO L78 Accepts]: Start accepts. Automaton has 2344 states and 3047 transitions. Word has length 307 [2024-10-31 15:05:36,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:05:36,075 INFO L471 AbstractCegarLoop]: Abstraction has 2344 states and 3047 transitions. [2024-10-31 15:05:36,075 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.5) internal successors, (158), 4 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 15:05:36,075 INFO L276 IsEmpty]: Start isEmpty. Operand 2344 states and 3047 transitions. [2024-10-31 15:05:36,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2024-10-31 15:05:36,079 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:05:36,080 INFO L215 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 9, 8, 7, 7, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 15:05:36,080 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-10-31 15:05:36,081 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:05:36,081 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:05:36,081 INFO L85 PathProgramCache]: Analyzing trace with hash -1338393859, now seen corresponding path program 1 times [2024-10-31 15:05:36,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:05:36,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1090057599] [2024-10-31 15:05:36,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:05:36,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:05:36,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:05:36,108 INFO L255 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-31 15:05:36,111 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:05:36,142 INFO L134 CoverageAnalysis]: Checked inductivity of 1074 backedges. 631 proven. 0 refuted. 0 times theorem prover too weak. 443 trivial. 0 not checked. [2024-10-31 15:05:36,142 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:05:36,172 INFO L134 CoverageAnalysis]: Checked inductivity of 1074 backedges. 631 proven. 0 refuted. 0 times theorem prover too weak. 443 trivial. 0 not checked. [2024-10-31 15:05:36,173 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:05:36,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1090057599] [2024-10-31 15:05:36,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1090057599] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 15:05:36,173 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 15:05:36,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2024-10-31 15:05:36,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136391355] [2024-10-31 15:05:36,173 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 15:05:36,174 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 15:05:36,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:05:36,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 15:05:36,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 15:05:36,174 INFO L87 Difference]: Start difference. First operand 2344 states and 3047 transitions. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 15:05:36,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:05:36,280 INFO L93 Difference]: Finished difference Result 4765 states and 6194 transitions. [2024-10-31 15:05:36,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 15:05:36,280 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 323 [2024-10-31 15:05:36,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:05:36,284 INFO L225 Difference]: With dead ends: 4765 [2024-10-31 15:05:36,284 INFO L226 Difference]: Without dead ends: 2442 [2024-10-31 15:05:36,285 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 644 GetRequests, 643 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 15:05:36,286 INFO L432 NwaCegarLoop]: 181 mSDtfsCounter, 9 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 15:05:36,286 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 267 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 15:05:36,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2442 states. [2024-10-31 15:05:36,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2442 to 2212. [2024-10-31 15:05:36,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2212 states, 2211 states have (on average 1.2831298055178653) internal successors, (2837), 2211 states have internal predecessors, (2837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 15:05:36,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2212 states to 2212 states and 2837 transitions. [2024-10-31 15:05:36,314 INFO L78 Accepts]: Start accepts. Automaton has 2212 states and 2837 transitions. Word has length 323 [2024-10-31 15:05:36,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:05:36,314 INFO L471 AbstractCegarLoop]: Abstraction has 2212 states and 2837 transitions. [2024-10-31 15:05:36,314 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 15:05:36,315 INFO L276 IsEmpty]: Start isEmpty. Operand 2212 states and 2837 transitions. [2024-10-31 15:05:36,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 356 [2024-10-31 15:05:36,318 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:05:36,318 INFO L215 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 10, 9, 8, 8, 7, 7, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 15:05:36,318 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-10-31 15:05:36,318 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:05:36,318 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:05:36,318 INFO L85 PathProgramCache]: Analyzing trace with hash 1263289202, now seen corresponding path program 1 times [2024-10-31 15:05:36,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:05:36,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [744537006] [2024-10-31 15:05:36,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:05:36,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:05:36,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:05:36,347 INFO L255 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-31 15:05:36,349 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:05:36,411 INFO L134 CoverageAnalysis]: Checked inductivity of 1310 backedges. 695 proven. 0 refuted. 0 times theorem prover too weak. 615 trivial. 0 not checked. [2024-10-31 15:05:36,412 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:05:36,483 INFO L134 CoverageAnalysis]: Checked inductivity of 1310 backedges. 695 proven. 0 refuted. 0 times theorem prover too weak. 615 trivial. 0 not checked. [2024-10-31 15:05:36,484 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:05:36,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [744537006] [2024-10-31 15:05:36,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [744537006] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 15:05:36,484 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 15:05:36,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2024-10-31 15:05:36,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219737840] [2024-10-31 15:05:36,484 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 15:05:36,485 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 15:05:36,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:05:36,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 15:05:36,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 15:05:36,485 INFO L87 Difference]: Start difference. First operand 2212 states and 2837 transitions. Second operand has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 15:05:36,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:05:36,527 INFO L93 Difference]: Finished difference Result 6380 states and 8142 transitions. [2024-10-31 15:05:36,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 15:05:36,530 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 355 [2024-10-31 15:05:36,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:05:36,536 INFO L225 Difference]: With dead ends: 6380 [2024-10-31 15:05:36,536 INFO L226 Difference]: Without dead ends: 4291 [2024-10-31 15:05:36,538 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 708 GetRequests, 707 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 15:05:36,538 INFO L432 NwaCegarLoop]: 312 mSDtfsCounter, 121 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 474 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 15:05:36,538 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 474 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 15:05:36,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4291 states. [2024-10-31 15:05:36,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4291 to 4199. [2024-10-31 15:05:36,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4199 states, 4198 states have (on average 1.2794187708432587) internal successors, (5371), 4198 states have internal predecessors, (5371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 15:05:36,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4199 states to 4199 states and 5371 transitions. [2024-10-31 15:05:36,593 INFO L78 Accepts]: Start accepts. Automaton has 4199 states and 5371 transitions. Word has length 355 [2024-10-31 15:05:36,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:05:36,594 INFO L471 AbstractCegarLoop]: Abstraction has 4199 states and 5371 transitions. [2024-10-31 15:05:36,594 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 15:05:36,594 INFO L276 IsEmpty]: Start isEmpty. Operand 4199 states and 5371 transitions. [2024-10-31 15:05:36,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 357 [2024-10-31 15:05:36,598 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:05:36,599 INFO L215 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 10, 9, 8, 8, 7, 7, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 15:05:36,599 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-10-31 15:05:36,599 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:05:36,600 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:05:36,600 INFO L85 PathProgramCache]: Analyzing trace with hash -1411878677, now seen corresponding path program 1 times [2024-10-31 15:05:36,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:05:36,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [278137655] [2024-10-31 15:05:36,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:05:36,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:05:36,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:05:36,635 INFO L255 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-31 15:05:36,639 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:05:36,701 INFO L134 CoverageAnalysis]: Checked inductivity of 1310 backedges. 852 proven. 26 refuted. 0 times theorem prover too weak. 432 trivial. 0 not checked. [2024-10-31 15:05:36,702 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:05:36,762 INFO L134 CoverageAnalysis]: Checked inductivity of 1310 backedges. 852 proven. 26 refuted. 0 times theorem prover too weak. 432 trivial. 0 not checked. [2024-10-31 15:05:36,762 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:05:36,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [278137655] [2024-10-31 15:05:36,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [278137655] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 15:05:36,762 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 15:05:36,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2024-10-31 15:05:36,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280042138] [2024-10-31 15:05:36,762 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 15:05:36,763 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 15:05:36,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:05:36,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 15:05:36,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 15:05:36,765 INFO L87 Difference]: Start difference. First operand 4199 states and 5371 transitions. Second operand has 4 states, 4 states have (on average 42.5) internal successors, (170), 4 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 15:05:37,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:05:37,012 INFO L93 Difference]: Finished difference Result 12233 states and 15541 transitions. [2024-10-31 15:05:37,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 15:05:37,013 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 42.5) internal successors, (170), 4 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 356 [2024-10-31 15:05:37,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:05:37,023 INFO L225 Difference]: With dead ends: 12233 [2024-10-31 15:05:37,023 INFO L226 Difference]: Without dead ends: 8157 [2024-10-31 15:05:37,026 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 712 GetRequests, 709 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-10-31 15:05:37,028 INFO L432 NwaCegarLoop]: 318 mSDtfsCounter, 123 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 639 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-31 15:05:37,028 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 639 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-31 15:05:37,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8157 states. [2024-10-31 15:05:37,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8157 to 5499. [2024-10-31 15:05:37,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5499 states, 5498 states have (on average 1.2781011276827938) internal successors, (7027), 5498 states have internal predecessors, (7027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 15:05:37,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5499 states to 5499 states and 7027 transitions. [2024-10-31 15:05:37,114 INFO L78 Accepts]: Start accepts. Automaton has 5499 states and 7027 transitions. Word has length 356 [2024-10-31 15:05:37,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:05:37,114 INFO L471 AbstractCegarLoop]: Abstraction has 5499 states and 7027 transitions. [2024-10-31 15:05:37,114 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 42.5) internal successors, (170), 4 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 15:05:37,115 INFO L276 IsEmpty]: Start isEmpty. Operand 5499 states and 7027 transitions. [2024-10-31 15:05:37,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 387 [2024-10-31 15:05:37,120 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:05:37,120 INFO L215 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 11, 10, 9, 9, 8, 8, 7, 7, 7, 7, 5, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 15:05:37,120 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-10-31 15:05:37,120 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:05:37,120 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:05:37,120 INFO L85 PathProgramCache]: Analyzing trace with hash 258910961, now seen corresponding path program 1 times [2024-10-31 15:05:37,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:05:37,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1449472249] [2024-10-31 15:05:37,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:05:37,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:05:37,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:05:37,155 INFO L255 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-31 15:05:37,157 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:05:37,178 INFO L134 CoverageAnalysis]: Checked inductivity of 1574 backedges. 893 proven. 0 refuted. 0 times theorem prover too weak. 681 trivial. 0 not checked. [2024-10-31 15:05:37,178 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:05:37,220 INFO L134 CoverageAnalysis]: Checked inductivity of 1574 backedges. 893 proven. 0 refuted. 0 times theorem prover too weak. 681 trivial. 0 not checked. [2024-10-31 15:05:37,220 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:05:37,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1449472249] [2024-10-31 15:05:37,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1449472249] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 15:05:37,220 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 15:05:37,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2024-10-31 15:05:37,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866846649] [2024-10-31 15:05:37,221 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 15:05:37,222 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 15:05:37,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:05:37,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 15:05:37,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 15:05:37,223 INFO L87 Difference]: Start difference. First operand 5499 states and 7027 transitions. Second operand has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 15:05:37,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:05:37,349 INFO L93 Difference]: Finished difference Result 11397 states and 14596 transitions. [2024-10-31 15:05:37,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 15:05:37,349 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 386 [2024-10-31 15:05:37,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:05:37,356 INFO L225 Difference]: With dead ends: 11397 [2024-10-31 15:05:37,356 INFO L226 Difference]: Without dead ends: 5919 [2024-10-31 15:05:37,360 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 770 GetRequests, 769 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 15:05:37,360 INFO L432 NwaCegarLoop]: 181 mSDtfsCounter, 9 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 15:05:37,360 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 267 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 15:05:37,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5919 states. [2024-10-31 15:05:37,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5919 to 5919. [2024-10-31 15:05:37,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5919 states, 5918 states have (on average 1.2761067928354173) internal successors, (7552), 5918 states have internal predecessors, (7552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 15:05:37,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5919 states to 5919 states and 7552 transitions. [2024-10-31 15:05:37,444 INFO L78 Accepts]: Start accepts. Automaton has 5919 states and 7552 transitions. Word has length 386 [2024-10-31 15:05:37,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:05:37,444 INFO L471 AbstractCegarLoop]: Abstraction has 5919 states and 7552 transitions. [2024-10-31 15:05:37,445 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 15:05:37,445 INFO L276 IsEmpty]: Start isEmpty. Operand 5919 states and 7552 transitions. [2024-10-31 15:05:37,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 388 [2024-10-31 15:05:37,450 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:05:37,450 INFO L215 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 11, 10, 9, 9, 8, 8, 7, 7, 7, 7, 5, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 15:05:37,450 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-10-31 15:05:37,450 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:05:37,450 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:05:37,451 INFO L85 PathProgramCache]: Analyzing trace with hash -284409887, now seen corresponding path program 1 times [2024-10-31 15:05:37,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:05:37,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2058396017] [2024-10-31 15:05:37,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:05:37,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:05:37,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:05:37,502 INFO L255 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-31 15:05:37,505 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:05:37,539 INFO L134 CoverageAnalysis]: Checked inductivity of 1574 backedges. 948 proven. 0 refuted. 0 times theorem prover too weak. 626 trivial. 0 not checked. [2024-10-31 15:05:37,540 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:05:37,575 INFO L134 CoverageAnalysis]: Checked inductivity of 1574 backedges. 948 proven. 0 refuted. 0 times theorem prover too weak. 626 trivial. 0 not checked. [2024-10-31 15:05:37,575 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:05:37,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2058396017] [2024-10-31 15:05:37,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [2058396017] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 15:05:37,575 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 15:05:37,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2024-10-31 15:05:37,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942322928] [2024-10-31 15:05:37,575 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 15:05:37,576 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 15:05:37,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:05:37,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 15:05:37,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 15:05:37,576 INFO L87 Difference]: Start difference. First operand 5919 states and 7552 transitions. Second operand has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 15:05:37,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:05:37,722 INFO L93 Difference]: Finished difference Result 12531 states and 16087 transitions. [2024-10-31 15:05:37,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 15:05:37,722 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 387 [2024-10-31 15:05:37,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:05:37,730 INFO L225 Difference]: With dead ends: 12531 [2024-10-31 15:05:37,731 INFO L226 Difference]: Without dead ends: 6633 [2024-10-31 15:05:37,735 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 772 GetRequests, 771 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 15:05:37,735 INFO L432 NwaCegarLoop]: 181 mSDtfsCounter, 9 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 15:05:37,735 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 267 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 15:05:37,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6633 states. [2024-10-31 15:05:37,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6633 to 6633. [2024-10-31 15:05:37,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6633 states, 6632 states have (on average 1.2622135102533172) internal successors, (8371), 6632 states have internal predecessors, (8371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 15:05:37,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6633 states to 6633 states and 8371 transitions. [2024-10-31 15:05:37,856 INFO L78 Accepts]: Start accepts. Automaton has 6633 states and 8371 transitions. Word has length 387 [2024-10-31 15:05:37,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:05:37,856 INFO L471 AbstractCegarLoop]: Abstraction has 6633 states and 8371 transitions. [2024-10-31 15:05:37,856 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 15:05:37,856 INFO L276 IsEmpty]: Start isEmpty. Operand 6633 states and 8371 transitions. [2024-10-31 15:05:37,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 405 [2024-10-31 15:05:37,861 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:05:37,861 INFO L215 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 12, 11, 10, 9, 9, 8, 8, 7, 7, 7, 7, 5, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 15:05:37,861 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-10-31 15:05:37,861 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:05:37,862 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:05:37,862 INFO L85 PathProgramCache]: Analyzing trace with hash -1793972455, now seen corresponding path program 1 times [2024-10-31 15:05:37,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:05:37,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [869582932] [2024-10-31 15:05:37,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:05:37,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:05:37,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:05:37,887 INFO L255 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-31 15:05:37,890 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:05:38,651 INFO L134 CoverageAnalysis]: Checked inductivity of 1768 backedges. 957 proven. 206 refuted. 0 times theorem prover too weak. 605 trivial. 0 not checked. [2024-10-31 15:05:38,651 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:05:39,341 INFO L134 CoverageAnalysis]: Checked inductivity of 1768 backedges. 1052 proven. 111 refuted. 0 times theorem prover too weak. 605 trivial. 0 not checked. [2024-10-31 15:05:39,342 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:05:39,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [869582932] [2024-10-31 15:05:39,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [869582932] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 15:05:39,342 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 15:05:39,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2024-10-31 15:05:39,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204694198] [2024-10-31 15:05:39,342 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 15:05:39,343 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-31 15:05:39,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:05:39,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-31 15:05:39,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-10-31 15:05:39,344 INFO L87 Difference]: Start difference. First operand 6633 states and 8371 transitions. Second operand has 7 states, 7 states have (on average 29.428571428571427) internal successors, (206), 7 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 15:05:40,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:05:40,417 INFO L93 Difference]: Finished difference Result 18732 states and 23708 transitions. [2024-10-31 15:05:40,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-31 15:05:40,418 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 29.428571428571427) internal successors, (206), 7 states have internal predecessors, (206), 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 404 [2024-10-31 15:05:40,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:05:40,432 INFO L225 Difference]: With dead ends: 18732 [2024-10-31 15:05:40,432 INFO L226 Difference]: Without dead ends: 12276 [2024-10-31 15:05:40,439 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 808 GetRequests, 802 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-10-31 15:05:40,440 INFO L432 NwaCegarLoop]: 264 mSDtfsCounter, 276 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 631 SdHoareTripleChecker+Invalid, 514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-10-31 15:05:40,440 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [276 Valid, 631 Invalid, 514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 488 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-10-31 15:05:40,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12276 states. [2024-10-31 15:05:40,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12276 to 11435. [2024-10-31 15:05:40,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11435 states, 11434 states have (on average 1.257215322721707) internal successors, (14375), 11434 states have internal predecessors, (14375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 15:05:40,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11435 states to 11435 states and 14375 transitions. [2024-10-31 15:05:40,684 INFO L78 Accepts]: Start accepts. Automaton has 11435 states and 14375 transitions. Word has length 404 [2024-10-31 15:05:40,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:05:40,684 INFO L471 AbstractCegarLoop]: Abstraction has 11435 states and 14375 transitions. [2024-10-31 15:05:40,685 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 29.428571428571427) internal successors, (206), 7 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 15:05:40,685 INFO L276 IsEmpty]: Start isEmpty. Operand 11435 states and 14375 transitions. [2024-10-31 15:05:40,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 419 [2024-10-31 15:05:40,692 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:05:40,692 INFO L215 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 12, 11, 10, 10, 9, 9, 8, 8, 8, 8, 6, 5, 5, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 15:05:40,693 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-10-31 15:05:40,693 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:05:40,693 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:05:40,693 INFO L85 PathProgramCache]: Analyzing trace with hash -944746421, now seen corresponding path program 1 times [2024-10-31 15:05:40,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:05:40,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [369724798] [2024-10-31 15:05:40,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:05:40,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:05:40,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:05:40,736 INFO L255 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-31 15:05:40,739 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:05:40,776 INFO L134 CoverageAnalysis]: Checked inductivity of 1873 backedges. 1113 proven. 0 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2024-10-31 15:05:40,776 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:05:40,810 INFO L134 CoverageAnalysis]: Checked inductivity of 1873 backedges. 1113 proven. 0 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2024-10-31 15:05:40,811 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:05:40,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [369724798] [2024-10-31 15:05:40,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [369724798] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 15:05:40,811 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 15:05:40,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2024-10-31 15:05:40,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192889538] [2024-10-31 15:05:40,811 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 15:05:40,812 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 15:05:40,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:05:40,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 15:05:40,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 15:05:40,812 INFO L87 Difference]: Start difference. First operand 11435 states and 14375 transitions. Second operand has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 15:05:41,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:05:41,050 INFO L93 Difference]: Finished difference Result 22484 states and 28273 transitions. [2024-10-31 15:05:41,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 15:05:41,051 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 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 418 [2024-10-31 15:05:41,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:05:41,063 INFO L225 Difference]: With dead ends: 22484 [2024-10-31 15:05:41,063 INFO L226 Difference]: Without dead ends: 11070 [2024-10-31 15:05:41,069 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 834 GetRequests, 833 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 15:05:41,069 INFO L432 NwaCegarLoop]: 181 mSDtfsCounter, 9 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 15:05:41,069 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 267 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 15:05:41,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11070 states. [2024-10-31 15:05:41,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11070 to 9969. [2024-10-31 15:05:41,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9969 states, 9968 states have (on average 1.2379614767255216) internal successors, (12340), 9968 states have internal predecessors, (12340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 15:05:41,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9969 states to 9969 states and 12340 transitions. [2024-10-31 15:05:41,258 INFO L78 Accepts]: Start accepts. Automaton has 9969 states and 12340 transitions. Word has length 418 [2024-10-31 15:05:41,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:05:41,258 INFO L471 AbstractCegarLoop]: Abstraction has 9969 states and 12340 transitions. [2024-10-31 15:05:41,258 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 15:05:41,258 INFO L276 IsEmpty]: Start isEmpty. Operand 9969 states and 12340 transitions. [2024-10-31 15:05:41,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 433 [2024-10-31 15:05:41,265 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:05:41,265 INFO L215 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 13, 12, 11, 10, 10, 9, 9, 8, 8, 8, 8, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 15:05:41,266 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-10-31 15:05:41,266 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:05:41,266 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:05:41,266 INFO L85 PathProgramCache]: Analyzing trace with hash -932113036, now seen corresponding path program 2 times [2024-10-31 15:05:41,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:05:41,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1610397943] [2024-10-31 15:05:41,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:05:41,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:05:41,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:05:41,300 INFO L255 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-31 15:05:41,304 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:05:42,267 INFO L134 CoverageAnalysis]: Checked inductivity of 2073 backedges. 1100 proven. 312 refuted. 0 times theorem prover too weak. 661 trivial. 0 not checked. [2024-10-31 15:05:42,267 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:05:43,173 INFO L134 CoverageAnalysis]: Checked inductivity of 2073 backedges. 1243 proven. 169 refuted. 0 times theorem prover too weak. 661 trivial. 0 not checked. [2024-10-31 15:05:43,173 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:05:43,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1610397943] [2024-10-31 15:05:43,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1610397943] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 15:05:43,174 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 15:05:43,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2024-10-31 15:05:43,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941262563] [2024-10-31 15:05:43,174 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 15:05:43,174 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-31 15:05:43,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:05:43,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-31 15:05:43,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-10-31 15:05:43,175 INFO L87 Difference]: Start difference. First operand 9969 states and 12340 transitions. Second operand has 7 states, 7 states have (on average 35.285714285714285) internal successors, (247), 7 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 15:05:44,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:05:44,113 INFO L93 Difference]: Finished difference Result 25892 states and 32114 transitions. [2024-10-31 15:05:44,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-31 15:05:44,113 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 35.285714285714285) internal successors, (247), 7 states have internal predecessors, (247), 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 432 [2024-10-31 15:05:44,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:05:44,133 INFO L225 Difference]: With dead ends: 25892 [2024-10-31 15:05:44,133 INFO L226 Difference]: Without dead ends: 15944 [2024-10-31 15:05:44,143 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 866 GetRequests, 858 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-10-31 15:05:44,143 INFO L432 NwaCegarLoop]: 282 mSDtfsCounter, 186 mSDsluCounter, 448 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 730 SdHoareTripleChecker+Invalid, 568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-10-31 15:05:44,144 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [186 Valid, 730 Invalid, 568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 533 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-10-31 15:05:44,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15944 states. [2024-10-31 15:05:44,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15944 to 15216. [2024-10-31 15:05:44,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15216 states, 15215 states have (on average 1.233848176141965) internal successors, (18773), 15215 states have internal predecessors, (18773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 15:05:44,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15216 states to 15216 states and 18773 transitions. [2024-10-31 15:05:44,433 INFO L78 Accepts]: Start accepts. Automaton has 15216 states and 18773 transitions. Word has length 432 [2024-10-31 15:05:44,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:05:44,433 INFO L471 AbstractCegarLoop]: Abstraction has 15216 states and 18773 transitions. [2024-10-31 15:05:44,433 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 35.285714285714285) internal successors, (247), 7 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 15:05:44,433 INFO L276 IsEmpty]: Start isEmpty. Operand 15216 states and 18773 transitions. [2024-10-31 15:05:44,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 446 [2024-10-31 15:05:44,445 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:05:44,445 INFO L215 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 14, 14, 13, 13, 11, 10, 10, 9, 9, 8, 8, 8, 8, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 15:05:44,445 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-10-31 15:05:44,446 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:05:44,446 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:05:44,446 INFO L85 PathProgramCache]: Analyzing trace with hash -708820783, now seen corresponding path program 1 times [2024-10-31 15:05:44,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:05:44,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1140925283] [2024-10-31 15:05:44,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:05:44,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:05:44,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:05:44,473 INFO L255 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-31 15:05:44,476 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:05:44,557 INFO L134 CoverageAnalysis]: Checked inductivity of 2233 backedges. 724 proven. 12 refuted. 0 times theorem prover too weak. 1497 trivial. 0 not checked. [2024-10-31 15:05:44,557 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:05:44,596 INFO L134 CoverageAnalysis]: Checked inductivity of 2233 backedges. 724 proven. 12 refuted. 0 times theorem prover too weak. 1497 trivial. 0 not checked. [2024-10-31 15:05:44,596 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:05:44,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1140925283] [2024-10-31 15:05:44,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1140925283] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 15:05:44,596 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 15:05:44,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2024-10-31 15:05:44,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196483479] [2024-10-31 15:05:44,597 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 15:05:44,597 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 15:05:44,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:05:44,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 15:05:44,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 15:05:44,598 INFO L87 Difference]: Start difference. First operand 15216 states and 18773 transitions. Second operand has 4 states, 4 states have (on average 38.25) internal successors, (153), 4 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 15:05:44,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:05:44,938 INFO L93 Difference]: Finished difference Result 30890 states and 38020 transitions. [2024-10-31 15:05:44,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 15:05:44,938 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.25) internal successors, (153), 4 states have internal predecessors, (153), 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 445 [2024-10-31 15:05:44,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:05:44,955 INFO L225 Difference]: With dead ends: 30890 [2024-10-31 15:05:44,955 INFO L226 Difference]: Without dead ends: 14680 [2024-10-31 15:05:44,962 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 890 GetRequests, 887 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-10-31 15:05:44,963 INFO L432 NwaCegarLoop]: 220 mSDtfsCounter, 22 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 484 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 15:05:44,963 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 484 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 15:05:44,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14680 states. [2024-10-31 15:05:45,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14680 to 14680. [2024-10-31 15:05:45,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14680 states, 14679 states have (on average 1.2239253355133184) internal successors, (17966), 14679 states have internal predecessors, (17966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 15:05:45,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14680 states to 14680 states and 17966 transitions. [2024-10-31 15:05:45,334 INFO L78 Accepts]: Start accepts. Automaton has 14680 states and 17966 transitions. Word has length 445 [2024-10-31 15:05:45,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:05:45,335 INFO L471 AbstractCegarLoop]: Abstraction has 14680 states and 17966 transitions. [2024-10-31 15:05:45,335 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.25) internal successors, (153), 4 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 15:05:45,335 INFO L276 IsEmpty]: Start isEmpty. Operand 14680 states and 17966 transitions. [2024-10-31 15:05:45,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2024-10-31 15:05:45,343 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:05:45,343 INFO L215 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 14, 14, 12, 11, 11, 10, 10, 9, 9, 9, 9, 6, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 15:05:45,343 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-10-31 15:05:45,343 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:05:45,344 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:05:45,344 INFO L85 PathProgramCache]: Analyzing trace with hash 2062023293, now seen corresponding path program 1 times [2024-10-31 15:05:45,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:05:45,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1470166844] [2024-10-31 15:05:45,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:05:45,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:05:45,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:05:45,376 INFO L255 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-31 15:05:45,379 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:05:45,435 INFO L134 CoverageAnalysis]: Checked inductivity of 2461 backedges. 1002 proven. 17 refuted. 0 times theorem prover too weak. 1442 trivial. 0 not checked. [2024-10-31 15:05:45,435 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:05:45,493 INFO L134 CoverageAnalysis]: Checked inductivity of 2461 backedges. 1002 proven. 17 refuted. 0 times theorem prover too weak. 1442 trivial. 0 not checked. [2024-10-31 15:05:45,493 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:05:45,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1470166844] [2024-10-31 15:05:45,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1470166844] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 15:05:45,493 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 15:05:45,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2024-10-31 15:05:45,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532911020] [2024-10-31 15:05:45,493 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 15:05:45,494 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-31 15:05:45,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:05:45,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-31 15:05:45,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-31 15:05:45,495 INFO L87 Difference]: Start difference. First operand 14680 states and 17966 transitions. Second operand has 6 states, 6 states have (on average 38.666666666666664) internal successors, (232), 6 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 15:05:45,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:05:45,844 INFO L93 Difference]: Finished difference Result 19622 states and 23983 transitions. [2024-10-31 15:05:45,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-31 15:05:45,845 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 38.666666666666664) internal successors, (232), 6 states have internal predecessors, (232), 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 475 [2024-10-31 15:05:45,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:05:45,846 INFO L225 Difference]: With dead ends: 19622 [2024-10-31 15:05:45,846 INFO L226 Difference]: Without dead ends: 0 [2024-10-31 15:05:45,854 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 954 GetRequests, 947 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2024-10-31 15:05:45,854 INFO L432 NwaCegarLoop]: 209 mSDtfsCounter, 216 mSDsluCounter, 458 mSDsCounter, 0 mSdLazyCounter, 506 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 667 SdHoareTripleChecker+Invalid, 552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-31 15:05:45,854 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [216 Valid, 667 Invalid, 552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 506 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-31 15:05:45,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-10-31 15:05:45,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-10-31 15:05:45,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 15:05:45,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-10-31 15:05:45,855 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 475 [2024-10-31 15:05:45,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:05:45,856 INFO L471 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-10-31 15:05:45,856 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 38.666666666666664) internal successors, (232), 6 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 15:05:45,856 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-10-31 15:05:45,856 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-10-31 15:05:45,858 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-10-31 15:05:45,861 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-10-31 15:05:45,863 INFO L407 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 15:05:45,865 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.