/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --cacsl2boogietranslator.allow.undefined.functions true --traceabstraction.smt.solver Internal_SMTInterpol -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Bitvector.epf -i ../../../trunk/examples/svcomp/bitvector/soft_float_1-3a.c.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.5-dev-356b6ba-m [2024-10-31 15:04:25,866 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-31 15:04:25,925 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 15:04:25,971 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-31 15:04:25,972 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-31 15:04:25,974 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-31 15:04:25,974 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-31 15:04:25,974 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-31 15:04:25,974 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-31 15:04:25,975 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-31 15:04:25,975 INFO L153 SettingsManager]: * Use SBE=true [2024-10-31 15:04:25,975 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-31 15:04:25,975 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-31 15:04:25,976 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-31 15:04:25,976 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-31 15:04:25,978 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-31 15:04:25,979 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-31 15:04:25,979 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-31 15:04:25,979 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-31 15:04:25,979 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-31 15:04:25,980 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-10-31 15:04:25,983 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-31 15:04:25,984 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-10-31 15:04:25,984 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-31 15:04:25,984 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-31 15:04:25,984 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-31 15:04:25,984 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-31 15:04:25,984 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-31 15:04:25,985 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-31 15:04:25,985 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-31 15:04:25,985 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 15:04:25,985 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-31 15:04:25,985 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-31 15:04:25,986 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-31 15:04:25,986 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2024-10-31 15:04:25,986 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-10-31 15:04:25,986 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-31 15:04:25,986 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-31 15:04:25,987 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-31 15:04:25,987 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-31 15:04:25,987 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2024-10-31 15:04:25,987 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Allow undefined functions -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol [2024-10-31 15:04:26,214 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-31 15:04:26,230 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-31 15:04:26,232 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-31 15:04:26,233 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-31 15:04:26,234 INFO L274 PluginConnector]: CDTParser initialized [2024-10-31 15:04:26,235 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/soft_float_1-3a.c.cil.c [2024-10-31 15:04:27,471 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-31 15:04:27,673 INFO L384 CDTParser]: Found 1 translation units. [2024-10-31 15:04:27,673 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/bitvector/soft_float_1-3a.c.cil.c [2024-10-31 15:04:27,682 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/00fda30c7/5b5d4429058a4befa6492f8b0b8cb532/FLAG3354b88c6 [2024-10-31 15:04:28,072 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/00fda30c7/5b5d4429058a4befa6492f8b0b8cb532 [2024-10-31 15:04:28,074 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-31 15:04:28,076 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-10-31 15:04:28,077 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-31 15:04:28,077 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-31 15:04:28,080 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-31 15:04:28,080 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 03:04:28" (1/1) ... [2024-10-31 15:04:28,081 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6fd5f7fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 03:04:28, skipping insertion in model container [2024-10-31 15:04:28,081 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 03:04:28" (1/1) ... [2024-10-31 15:04:28,101 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-31 15:04:28,247 WARN L251 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/bitvector/soft_float_1-3a.c.cil.c[730,743] [2024-10-31 15:04:28,309 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 15:04:28,324 INFO L200 MainTranslator]: Completed pre-run [2024-10-31 15:04:28,334 WARN L251 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/bitvector/soft_float_1-3a.c.cil.c[730,743] [2024-10-31 15:04:28,366 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 15:04:28,382 INFO L204 MainTranslator]: Completed translation [2024-10-31 15:04:28,383 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 03:04:28 WrapperNode [2024-10-31 15:04:28,384 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-31 15:04:28,385 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-31 15:04:28,385 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-31 15:04:28,385 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-31 15:04:28,391 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 03:04:28" (1/1) ... [2024-10-31 15:04:28,401 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 03:04:28" (1/1) ... [2024-10-31 15:04:28,429 INFO L138 Inliner]: procedures = 17, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 148 [2024-10-31 15:04:28,430 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-31 15:04:28,430 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-31 15:04:28,430 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-31 15:04:28,430 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-31 15:04:28,440 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 03:04:28" (1/1) ... [2024-10-31 15:04:28,440 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 03:04:28" (1/1) ... [2024-10-31 15:04:28,445 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 03:04:28" (1/1) ... [2024-10-31 15:04:28,465 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 15:04:28,465 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 03:04:28" (1/1) ... [2024-10-31 15:04:28,465 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 03:04:28" (1/1) ... [2024-10-31 15:04:28,477 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 03:04:28" (1/1) ... [2024-10-31 15:04:28,480 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 03:04:28" (1/1) ... [2024-10-31 15:04:28,482 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 03:04:28" (1/1) ... [2024-10-31 15:04:28,483 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 03:04:28" (1/1) ... [2024-10-31 15:04:28,485 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-31 15:04:28,486 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-31 15:04:28,486 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-31 15:04:28,486 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-31 15:04:28,487 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 03:04:28" (1/1) ... [2024-10-31 15:04:28,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 15:04:28,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-31 15:04:28,514 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 15:04:28,517 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 15:04:28,540 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-31 15:04:28,540 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-10-31 15:04:28,540 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2024-10-31 15:04:28,540 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2024-10-31 15:04:28,540 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-31 15:04:28,540 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-31 15:04:28,541 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-10-31 15:04:28,541 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-10-31 15:04:28,608 INFO L238 CfgBuilder]: Building ICFG [2024-10-31 15:04:28,610 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-31 15:04:28,933 INFO L? ?]: Removed 55 outVars from TransFormulas that were not future-live. [2024-10-31 15:04:28,933 INFO L287 CfgBuilder]: Performing block encoding [2024-10-31 15:04:28,946 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-31 15:04:28,947 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-10-31 15:04:28,948 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 03:04:28 BoogieIcfgContainer [2024-10-31 15:04:28,948 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-31 15:04:28,950 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-31 15:04:28,950 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-31 15:04:28,952 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-31 15:04:28,953 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.10 03:04:28" (1/3) ... [2024-10-31 15:04:28,953 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1047a112 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 03:04:28, skipping insertion in model container [2024-10-31 15:04:28,953 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 03:04:28" (2/3) ... [2024-10-31 15:04:28,953 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1047a112 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 03:04:28, skipping insertion in model container [2024-10-31 15:04:28,953 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 03:04:28" (3/3) ... [2024-10-31 15:04:28,954 INFO L112 eAbstractionObserver]: Analyzing ICFG soft_float_1-3a.c.cil.c [2024-10-31 15:04:28,967 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-31 15:04:28,968 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-31 15:04:29,020 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-31 15:04:29,025 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;@5f51d128, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-31 15:04:29,025 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-31 15:04:29,028 INFO L276 IsEmpty]: Start isEmpty. Operand has 72 states, 59 states have (on average 1.5932203389830508) internal successors, (94), 62 states have internal predecessors, (94), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-10-31 15:04:29,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-10-31 15:04:29,035 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:04:29,036 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 15:04:29,036 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:04:29,040 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:04:29,040 INFO L85 PathProgramCache]: Analyzing trace with hash -1607439287, now seen corresponding path program 1 times [2024-10-31 15:04:29,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:04:29,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [709560970] [2024-10-31 15:04:29,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:04:29,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:04:29,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:04:29,231 INFO L255 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-31 15:04:29,237 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:04:29,346 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-31 15:04:29,346 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:04:29,415 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-31 15:04:29,416 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:04:29,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [709560970] [2024-10-31 15:04:29,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [709560970] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 15:04:29,416 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 15:04:29,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2024-10-31 15:04:29,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468095475] [2024-10-31 15:04:29,419 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 15:04:29,423 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-31 15:04:29,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:04:29,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-31 15:04:29,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-10-31 15:04:29,449 INFO L87 Difference]: Start difference. First operand has 72 states, 59 states have (on average 1.5932203389830508) internal successors, (94), 62 states have internal predecessors, (94), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-31 15:04:29,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:04:29,688 INFO L93 Difference]: Finished difference Result 175 states and 289 transitions. [2024-10-31 15:04:29,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-31 15:04:29,694 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 32 [2024-10-31 15:04:29,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:04:29,701 INFO L225 Difference]: With dead ends: 175 [2024-10-31 15:04:29,701 INFO L226 Difference]: Without dead ends: 100 [2024-10-31 15:04:29,704 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-10-31 15:04:29,708 INFO L432 NwaCegarLoop]: 92 mSDtfsCounter, 33 mSDsluCounter, 538 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 630 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-31 15:04:29,709 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 630 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-31 15:04:29,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2024-10-31 15:04:29,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 98. [2024-10-31 15:04:29,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 82 states have (on average 1.475609756097561) internal successors, (121), 85 states have internal predecessors, (121), 12 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (15), 12 states have call predecessors, (15), 11 states have call successors, (15) [2024-10-31 15:04:29,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 148 transitions. [2024-10-31 15:04:29,746 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 148 transitions. Word has length 32 [2024-10-31 15:04:29,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:04:29,746 INFO L471 AbstractCegarLoop]: Abstraction has 98 states and 148 transitions. [2024-10-31 15:04:29,746 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-31 15:04:29,747 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 148 transitions. [2024-10-31 15:04:29,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-10-31 15:04:29,751 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:04:29,751 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 15:04:29,751 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-31 15:04:29,751 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:04:29,752 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:04:29,752 INFO L85 PathProgramCache]: Analyzing trace with hash -33736322, now seen corresponding path program 1 times [2024-10-31 15:04:29,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:04:29,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1461476960] [2024-10-31 15:04:29,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:04:29,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:04:29,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:04:29,929 INFO L255 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-31 15:04:29,931 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:04:29,995 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-31 15:04:29,995 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:04:30,072 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-31 15:04:30,072 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:04:30,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1461476960] [2024-10-31 15:04:30,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1461476960] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 15:04:30,073 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 15:04:30,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 7 [2024-10-31 15:04:30,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857014853] [2024-10-31 15:04:30,073 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 15:04:30,074 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-31 15:04:30,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:04:30,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-31 15:04:30,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-10-31 15:04:30,077 INFO L87 Difference]: Start difference. First operand 98 states and 148 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-10-31 15:04:30,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:04:30,192 INFO L93 Difference]: Finished difference Result 185 states and 287 transitions. [2024-10-31 15:04:30,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-31 15:04:30,194 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 36 [2024-10-31 15:04:30,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:04:30,196 INFO L225 Difference]: With dead ends: 185 [2024-10-31 15:04:30,196 INFO L226 Difference]: Without dead ends: 120 [2024-10-31 15:04:30,196 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-10-31 15:04:30,197 INFO L432 NwaCegarLoop]: 97 mSDtfsCounter, 9 mSDsluCounter, 456 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 553 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 15:04:30,198 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 553 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 15:04:30,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2024-10-31 15:04:30,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 114. [2024-10-31 15:04:30,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 95 states have (on average 1.4210526315789473) internal successors, (135), 96 states have internal predecessors, (135), 15 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (21), 17 states have call predecessors, (21), 14 states have call successors, (21) [2024-10-31 15:04:30,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 171 transitions. [2024-10-31 15:04:30,209 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 171 transitions. Word has length 36 [2024-10-31 15:04:30,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:04:30,210 INFO L471 AbstractCegarLoop]: Abstraction has 114 states and 171 transitions. [2024-10-31 15:04:30,210 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-10-31 15:04:30,210 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 171 transitions. [2024-10-31 15:04:30,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-10-31 15:04:30,211 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:04:30,212 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 15:04:30,212 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-31 15:04:30,212 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:04:30,212 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:04:30,212 INFO L85 PathProgramCache]: Analyzing trace with hash 383634716, now seen corresponding path program 1 times [2024-10-31 15:04:30,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:04:30,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1021697267] [2024-10-31 15:04:30,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:04:30,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:04:30,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:04:30,346 INFO L255 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-31 15:04:30,353 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:04:30,396 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-31 15:04:30,397 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:04:30,459 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-31 15:04:30,459 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:04:30,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1021697267] [2024-10-31 15:04:30,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1021697267] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 15:04:30,460 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 15:04:30,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2024-10-31 15:04:30,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274306499] [2024-10-31 15:04:30,460 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 15:04:30,460 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-31 15:04:30,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:04:30,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-31 15:04:30,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-10-31 15:04:30,465 INFO L87 Difference]: Start difference. First operand 114 states and 171 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 6 states have internal predecessors, (35), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-31 15:04:30,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:04:30,577 INFO L93 Difference]: Finished difference Result 250 states and 377 transitions. [2024-10-31 15:04:30,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-31 15:04:30,578 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 6 states have internal predecessors, (35), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) Word has length 40 [2024-10-31 15:04:30,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:04:30,579 INFO L225 Difference]: With dead ends: 250 [2024-10-31 15:04:30,580 INFO L226 Difference]: Without dead ends: 189 [2024-10-31 15:04:30,580 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-10-31 15:04:30,581 INFO L432 NwaCegarLoop]: 90 mSDtfsCounter, 90 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 15:04:30,582 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 429 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 15:04:30,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2024-10-31 15:04:30,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 187. [2024-10-31 15:04:30,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 161 states have (on average 1.4099378881987579) internal successors, (227), 160 states have internal predecessors, (227), 22 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (28), 28 states have call predecessors, (28), 21 states have call successors, (28) [2024-10-31 15:04:30,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 277 transitions. [2024-10-31 15:04:30,595 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 277 transitions. Word has length 40 [2024-10-31 15:04:30,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:04:30,596 INFO L471 AbstractCegarLoop]: Abstraction has 187 states and 277 transitions. [2024-10-31 15:04:30,596 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 6 states have internal predecessors, (35), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-31 15:04:30,596 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 277 transitions. [2024-10-31 15:04:30,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-10-31 15:04:30,598 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:04:30,599 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 15:04:30,599 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-31 15:04:30,599 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:04:30,599 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:04:30,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1063693086, now seen corresponding path program 1 times [2024-10-31 15:04:30,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:04:30,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [978481938] [2024-10-31 15:04:30,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:04:30,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:04:30,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:04:30,709 INFO L255 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-31 15:04:30,712 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:04:30,769 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-31 15:04:30,770 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:04:30,821 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-31 15:04:30,822 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:04:30,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [978481938] [2024-10-31 15:04:30,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [978481938] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 15:04:30,822 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 15:04:30,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 8 [2024-10-31 15:04:30,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505206620] [2024-10-31 15:04:30,822 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 15:04:30,823 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-31 15:04:30,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:04:30,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-31 15:04:30,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-10-31 15:04:30,824 INFO L87 Difference]: Start difference. First operand 187 states and 277 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-31 15:04:30,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:04:30,927 INFO L93 Difference]: Finished difference Result 235 states and 346 transitions. [2024-10-31 15:04:30,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-31 15:04:30,928 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 40 [2024-10-31 15:04:30,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:04:30,929 INFO L225 Difference]: With dead ends: 235 [2024-10-31 15:04:30,929 INFO L226 Difference]: Without dead ends: 180 [2024-10-31 15:04:30,930 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-10-31 15:04:30,930 INFO L432 NwaCegarLoop]: 87 mSDtfsCounter, 34 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 510 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 15:04:30,931 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 510 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 15:04:30,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2024-10-31 15:04:30,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 178. [2024-10-31 15:04:30,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 155 states have (on average 1.3870967741935485) internal successors, (215), 154 states have internal predecessors, (215), 19 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (25), 25 states have call predecessors, (25), 18 states have call successors, (25) [2024-10-31 15:04:30,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 259 transitions. [2024-10-31 15:04:30,951 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 259 transitions. Word has length 40 [2024-10-31 15:04:30,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:04:30,951 INFO L471 AbstractCegarLoop]: Abstraction has 178 states and 259 transitions. [2024-10-31 15:04:30,951 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-31 15:04:30,951 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 259 transitions. [2024-10-31 15:04:30,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-10-31 15:04:30,952 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:04:30,952 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 15:04:30,953 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-31 15:04:30,953 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:04:30,953 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:04:30,953 INFO L85 PathProgramCache]: Analyzing trace with hash 339137576, now seen corresponding path program 1 times [2024-10-31 15:04:30,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:04:30,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2052464592] [2024-10-31 15:04:30,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:04:30,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:04:30,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:04:30,991 INFO L255 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-31 15:04:30,993 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:04:31,120 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-31 15:04:31,121 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:04:31,197 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-31 15:04:31,197 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:04:31,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2052464592] [2024-10-31 15:04:31,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [2052464592] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-31 15:04:31,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-31 15:04:31,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2024-10-31 15:04:31,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845299123] [2024-10-31 15:04:31,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 15:04:31,198 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-31 15:04:31,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:04:31,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-31 15:04:31,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2024-10-31 15:04:31,199 INFO L87 Difference]: Start difference. First operand 178 states and 259 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-31 15:04:31,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:04:31,358 INFO L93 Difference]: Finished difference Result 276 states and 409 transitions. [2024-10-31 15:04:31,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-31 15:04:31,358 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 43 [2024-10-31 15:04:31,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:04:31,360 INFO L225 Difference]: With dead ends: 276 [2024-10-31 15:04:31,360 INFO L226 Difference]: Without dead ends: 222 [2024-10-31 15:04:31,360 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2024-10-31 15:04:31,361 INFO L432 NwaCegarLoop]: 94 mSDtfsCounter, 24 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 15:04:31,361 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 400 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 15:04:31,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2024-10-31 15:04:31,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 216. [2024-10-31 15:04:31,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 187 states have (on average 1.3796791443850267) internal successors, (258), 188 states have internal predecessors, (258), 25 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (31), 31 states have call predecessors, (31), 24 states have call successors, (31) [2024-10-31 15:04:31,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 314 transitions. [2024-10-31 15:04:31,381 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 314 transitions. Word has length 43 [2024-10-31 15:04:31,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:04:31,381 INFO L471 AbstractCegarLoop]: Abstraction has 216 states and 314 transitions. [2024-10-31 15:04:31,382 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-31 15:04:31,382 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 314 transitions. [2024-10-31 15:04:31,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-10-31 15:04:31,388 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:04:31,388 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 15:04:31,388 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-31 15:04:31,388 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:04:31,389 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:04:31,389 INFO L85 PathProgramCache]: Analyzing trace with hash 396395878, now seen corresponding path program 1 times [2024-10-31 15:04:31,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:04:31,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1820401496] [2024-10-31 15:04:31,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:04:31,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:04:31,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:04:31,414 INFO L255 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-31 15:04:31,416 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:04:31,450 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-31 15:04:31,450 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:04:31,499 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-31 15:04:31,500 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:04:31,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1820401496] [2024-10-31 15:04:31,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1820401496] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 15:04:31,500 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 15:04:31,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2024-10-31 15:04:31,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004692805] [2024-10-31 15:04:31,500 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 15:04:31,501 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-31 15:04:31,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:04:31,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-31 15:04:31,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-10-31 15:04:31,501 INFO L87 Difference]: Start difference. First operand 216 states and 314 transitions. Second operand has 10 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-31 15:04:31,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:04:31,560 INFO L93 Difference]: Finished difference Result 270 states and 393 transitions. [2024-10-31 15:04:31,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-31 15:04:31,561 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 43 [2024-10-31 15:04:31,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:04:31,563 INFO L225 Difference]: With dead ends: 270 [2024-10-31 15:04:31,563 INFO L226 Difference]: Without dead ends: 268 [2024-10-31 15:04:31,563 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-10-31 15:04:31,564 INFO L432 NwaCegarLoop]: 116 mSDtfsCounter, 49 mSDsluCounter, 670 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 786 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 15:04:31,567 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 786 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 15:04:31,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2024-10-31 15:04:31,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 222. [2024-10-31 15:04:31,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 190 states have (on average 1.3736842105263158) internal successors, (261), 193 states have internal predecessors, (261), 27 states have call successors, (27), 3 states have call predecessors, (27), 4 states have return successors, (33), 31 states have call predecessors, (33), 26 states have call successors, (33) [2024-10-31 15:04:31,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 321 transitions. [2024-10-31 15:04:31,582 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 321 transitions. Word has length 43 [2024-10-31 15:04:31,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:04:31,582 INFO L471 AbstractCegarLoop]: Abstraction has 222 states and 321 transitions. [2024-10-31 15:04:31,582 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-31 15:04:31,582 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 321 transitions. [2024-10-31 15:04:31,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-10-31 15:04:31,583 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:04:31,583 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 15:04:31,583 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-31 15:04:31,583 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:04:31,583 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:04:31,584 INFO L85 PathProgramCache]: Analyzing trace with hash 1084774570, now seen corresponding path program 1 times [2024-10-31 15:04:31,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:04:31,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [978093888] [2024-10-31 15:04:31,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:04:31,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:04:31,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:04:31,609 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-31 15:04:31,613 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:04:31,636 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-31 15:04:31,637 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:04:31,669 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-31 15:04:31,669 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:04:31,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [978093888] [2024-10-31 15:04:31,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [978093888] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 15:04:31,670 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 15:04:31,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2024-10-31 15:04:31,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600235647] [2024-10-31 15:04:31,670 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 15:04:31,670 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-31 15:04:31,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:04:31,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-31 15:04:31,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-10-31 15:04:31,671 INFO L87 Difference]: Start difference. First operand 222 states and 321 transitions. Second operand has 8 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-31 15:04:31,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:04:31,702 INFO L93 Difference]: Finished difference Result 229 states and 327 transitions. [2024-10-31 15:04:31,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 15:04:31,703 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2024-10-31 15:04:31,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:04:31,705 INFO L225 Difference]: With dead ends: 229 [2024-10-31 15:04:31,705 INFO L226 Difference]: Without dead ends: 222 [2024-10-31 15:04:31,705 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-10-31 15:04:31,706 INFO L432 NwaCegarLoop]: 103 mSDtfsCounter, 6 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 15:04:31,706 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 397 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 15:04:31,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2024-10-31 15:04:31,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 222. [2024-10-31 15:04:31,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 190 states have (on average 1.3578947368421053) internal successors, (258), 193 states have internal predecessors, (258), 27 states have call successors, (27), 3 states have call predecessors, (27), 4 states have return successors, (33), 31 states have call predecessors, (33), 26 states have call successors, (33) [2024-10-31 15:04:31,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 318 transitions. [2024-10-31 15:04:31,717 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 318 transitions. Word has length 44 [2024-10-31 15:04:31,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:04:31,718 INFO L471 AbstractCegarLoop]: Abstraction has 222 states and 318 transitions. [2024-10-31 15:04:31,718 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-31 15:04:31,718 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 318 transitions. [2024-10-31 15:04:31,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-10-31 15:04:31,719 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:04:31,719 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 15:04:31,719 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-10-31 15:04:31,720 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:04:31,720 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:04:31,720 INFO L85 PathProgramCache]: Analyzing trace with hash -1077808761, now seen corresponding path program 2 times [2024-10-31 15:04:31,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:04:31,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [752011071] [2024-10-31 15:04:31,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:04:31,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:04:33,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:04:33,426 INFO L255 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-10-31 15:04:33,429 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:04:33,637 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-10-31 15:04:33,637 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:04:33,846 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-10-31 15:04:33,846 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:04:33,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [752011071] [2024-10-31 15:04:33,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [752011071] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-31 15:04:33,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-31 15:04:33,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [13] total 20 [2024-10-31 15:04:33,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100423496] [2024-10-31 15:04:33,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 15:04:33,847 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-31 15:04:33,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:04:33,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-31 15:04:33,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2024-10-31 15:04:33,848 INFO L87 Difference]: Start difference. First operand 222 states and 318 transitions. Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-31 15:04:34,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:04:34,227 INFO L93 Difference]: Finished difference Result 325 states and 472 transitions. [2024-10-31 15:04:34,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-31 15:04:34,227 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2024-10-31 15:04:34,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:04:34,229 INFO L225 Difference]: With dead ends: 325 [2024-10-31 15:04:34,229 INFO L226 Difference]: Without dead ends: 323 [2024-10-31 15:04:34,229 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 66 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2024-10-31 15:04:34,230 INFO L432 NwaCegarLoop]: 122 mSDtfsCounter, 38 mSDsluCounter, 718 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 840 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-31 15:04:34,230 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 840 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-31 15:04:34,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2024-10-31 15:04:34,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 226. [2024-10-31 15:04:34,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 193 states have (on average 1.3523316062176165) internal successors, (261), 196 states have internal predecessors, (261), 27 states have call successors, (27), 4 states have call predecessors, (27), 5 states have return successors, (33), 31 states have call predecessors, (33), 26 states have call successors, (33) [2024-10-31 15:04:34,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 321 transitions. [2024-10-31 15:04:34,240 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 321 transitions. Word has length 44 [2024-10-31 15:04:34,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:04:34,244 INFO L471 AbstractCegarLoop]: Abstraction has 226 states and 321 transitions. [2024-10-31 15:04:34,244 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-31 15:04:34,244 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 321 transitions. [2024-10-31 15:04:34,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-10-31 15:04:34,245 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:04:34,245 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 15:04:34,245 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-10-31 15:04:34,245 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:04:34,245 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:04:34,245 INFO L85 PathProgramCache]: Analyzing trace with hash -453561043, now seen corresponding path program 1 times [2024-10-31 15:04:34,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:04:34,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1934519593] [2024-10-31 15:04:34,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:04:34,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:04:34,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:04:34,301 INFO L255 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-31 15:04:34,303 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:04:34,372 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-31 15:04:34,373 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:04:34,451 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-31 15:04:34,451 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:04:34,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1934519593] [2024-10-31 15:04:34,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1934519593] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 15:04:34,451 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 15:04:34,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 8 [2024-10-31 15:04:34,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316350872] [2024-10-31 15:04:34,451 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 15:04:34,452 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-31 15:04:34,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:04:34,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-31 15:04:34,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-10-31 15:04:34,452 INFO L87 Difference]: Start difference. First operand 226 states and 321 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-31 15:04:34,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:04:34,610 INFO L93 Difference]: Finished difference Result 421 states and 607 transitions. [2024-10-31 15:04:34,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-31 15:04:34,610 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 45 [2024-10-31 15:04:34,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:04:34,612 INFO L225 Difference]: With dead ends: 421 [2024-10-31 15:04:34,612 INFO L226 Difference]: Without dead ends: 387 [2024-10-31 15:04:34,612 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 80 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-10-31 15:04:34,613 INFO L432 NwaCegarLoop]: 134 mSDtfsCounter, 44 mSDsluCounter, 690 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 824 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 15:04:34,613 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 824 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 15:04:34,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2024-10-31 15:04:34,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 235. [2024-10-31 15:04:34,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 201 states have (on average 1.36318407960199) internal successors, (274), 201 states have internal predecessors, (274), 28 states have call successors, (28), 4 states have call predecessors, (28), 5 states have return successors, (34), 34 states have call predecessors, (34), 27 states have call successors, (34) [2024-10-31 15:04:34,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 336 transitions. [2024-10-31 15:04:34,632 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 336 transitions. Word has length 45 [2024-10-31 15:04:34,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:04:34,633 INFO L471 AbstractCegarLoop]: Abstraction has 235 states and 336 transitions. [2024-10-31 15:04:34,633 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-31 15:04:34,633 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 336 transitions. [2024-10-31 15:04:34,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-10-31 15:04:34,634 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:04:34,634 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 15:04:34,634 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-10-31 15:04:34,634 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:04:34,634 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:04:34,635 INFO L85 PathProgramCache]: Analyzing trace with hash 1134786859, now seen corresponding path program 1 times [2024-10-31 15:04:34,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:04:34,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [805959029] [2024-10-31 15:04:34,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:04:34,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:04:34,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:04:34,682 INFO L255 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-31 15:04:34,685 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:04:34,719 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-31 15:04:34,720 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:04:34,783 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-31 15:04:34,783 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:04:34,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [805959029] [2024-10-31 15:04:34,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [805959029] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 15:04:34,784 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 15:04:34,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2024-10-31 15:04:34,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854780819] [2024-10-31 15:04:34,784 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 15:04:34,784 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-31 15:04:34,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:04:34,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-31 15:04:34,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-10-31 15:04:34,785 INFO L87 Difference]: Start difference. First operand 235 states and 336 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-31 15:04:35,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:04:35,063 INFO L93 Difference]: Finished difference Result 304 states and 430 transitions. [2024-10-31 15:04:35,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-31 15:04:35,064 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2024-10-31 15:04:35,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:04:35,066 INFO L225 Difference]: With dead ends: 304 [2024-10-31 15:04:35,066 INFO L226 Difference]: Without dead ends: 270 [2024-10-31 15:04:35,066 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2024-10-31 15:04:35,066 INFO L432 NwaCegarLoop]: 84 mSDtfsCounter, 60 mSDsluCounter, 479 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 563 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-31 15:04:35,067 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 563 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-31 15:04:35,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2024-10-31 15:04:35,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 208. [2024-10-31 15:04:35,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 176 states have (on average 1.3579545454545454) internal successors, (239), 174 states have internal predecessors, (239), 26 states have call successors, (26), 4 states have call predecessors, (26), 5 states have return successors, (32), 32 states have call predecessors, (32), 25 states have call successors, (32) [2024-10-31 15:04:35,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 297 transitions. [2024-10-31 15:04:35,078 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 297 transitions. Word has length 45 [2024-10-31 15:04:35,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:04:35,078 INFO L471 AbstractCegarLoop]: Abstraction has 208 states and 297 transitions. [2024-10-31 15:04:35,078 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-31 15:04:35,079 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 297 transitions. [2024-10-31 15:04:35,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-10-31 15:04:35,079 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:04:35,079 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 15:04:35,079 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-10-31 15:04:35,079 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:04:35,080 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:04:35,080 INFO L85 PathProgramCache]: Analyzing trace with hash 702695573, now seen corresponding path program 1 times [2024-10-31 15:04:35,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:04:35,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [335296098] [2024-10-31 15:04:35,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:04:35,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:04:35,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:04:35,097 INFO L255 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-31 15:04:35,098 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:04:35,108 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-31 15:04:35,108 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:04:35,122 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-31 15:04:35,122 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:04:35,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [335296098] [2024-10-31 15:04:35,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [335296098] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 15:04:35,122 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 15:04:35,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2024-10-31 15:04:35,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727807623] [2024-10-31 15:04:35,123 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 15:04:35,123 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 15:04:35,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:04:35,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 15:04:35,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 15:04:35,124 INFO L87 Difference]: Start difference. First operand 208 states and 297 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-31 15:04:35,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:04:35,144 INFO L93 Difference]: Finished difference Result 221 states and 311 transitions. [2024-10-31 15:04:35,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 15:04:35,145 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 48 [2024-10-31 15:04:35,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:04:35,147 INFO L225 Difference]: With dead ends: 221 [2024-10-31 15:04:35,147 INFO L226 Difference]: Without dead ends: 197 [2024-10-31 15:04:35,147 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 15:04:35,147 INFO L432 NwaCegarLoop]: 99 mSDtfsCounter, 0 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 15:04:35,148 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 291 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 15:04:35,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2024-10-31 15:04:35,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 194. [2024-10-31 15:04:35,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 163 states have (on average 1.3312883435582823) internal successors, (217), 160 states have internal predecessors, (217), 25 states have call successors, (25), 4 states have call predecessors, (25), 5 states have return successors, (30), 30 states have call predecessors, (30), 23 states have call successors, (30) [2024-10-31 15:04:35,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 272 transitions. [2024-10-31 15:04:35,159 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 272 transitions. Word has length 48 [2024-10-31 15:04:35,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:04:35,159 INFO L471 AbstractCegarLoop]: Abstraction has 194 states and 272 transitions. [2024-10-31 15:04:35,160 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-31 15:04:35,160 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 272 transitions. [2024-10-31 15:04:35,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-10-31 15:04:35,160 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:04:35,160 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 15:04:35,160 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-10-31 15:04:35,161 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:04:35,161 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:04:35,161 INFO L85 PathProgramCache]: Analyzing trace with hash -1948634931, now seen corresponding path program 1 times [2024-10-31 15:04:35,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:04:35,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [250483153] [2024-10-31 15:04:35,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:04:35,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:04:42,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:04:42,355 INFO L255 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-10-31 15:04:42,357 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:04:42,427 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-31 15:04:42,428 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:04:42,546 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-10-31 15:04:42,546 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:04:42,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [250483153] [2024-10-31 15:04:42,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [250483153] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 15:04:42,546 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 15:04:42,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 11 [2024-10-31 15:04:42,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117695418] [2024-10-31 15:04:42,547 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 15:04:42,547 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-31 15:04:42,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:04:42,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-31 15:04:42,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-10-31 15:04:42,548 INFO L87 Difference]: Start difference. First operand 194 states and 272 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 9 states have internal predecessors, (38), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2024-10-31 15:04:42,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:04:42,766 INFO L93 Difference]: Finished difference Result 299 states and 405 transitions. [2024-10-31 15:04:42,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-31 15:04:42,766 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 9 states have internal predecessors, (38), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 50 [2024-10-31 15:04:42,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:04:42,769 INFO L225 Difference]: With dead ends: 299 [2024-10-31 15:04:42,769 INFO L226 Difference]: Without dead ends: 236 [2024-10-31 15:04:42,770 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 86 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2024-10-31 15:04:42,770 INFO L432 NwaCegarLoop]: 88 mSDtfsCounter, 62 mSDsluCounter, 668 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 756 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-31 15:04:42,770 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 756 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-31 15:04:42,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2024-10-31 15:04:42,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 172. [2024-10-31 15:04:42,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 146 states have (on average 1.3150684931506849) internal successors, (192), 143 states have internal predecessors, (192), 20 states have call successors, (20), 4 states have call predecessors, (20), 5 states have return successors, (25), 25 states have call predecessors, (25), 18 states have call successors, (25) [2024-10-31 15:04:42,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 237 transitions. [2024-10-31 15:04:42,781 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 237 transitions. Word has length 50 [2024-10-31 15:04:42,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:04:42,782 INFO L471 AbstractCegarLoop]: Abstraction has 172 states and 237 transitions. [2024-10-31 15:04:42,782 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 9 states have internal predecessors, (38), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2024-10-31 15:04:42,782 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 237 transitions. [2024-10-31 15:04:42,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-10-31 15:04:42,783 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:04:42,783 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 15:04:42,783 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-10-31 15:04:42,783 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:04:42,783 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:04:42,783 INFO L85 PathProgramCache]: Analyzing trace with hash 45509775, now seen corresponding path program 1 times [2024-10-31 15:04:42,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:04:42,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [54930785] [2024-10-31 15:04:42,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:04:42,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms