/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_3a.c.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.5-dev-356b6ba-m [2024-10-31 15:04:38,128 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-31 15:04:38,210 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 15:04:38,240 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-31 15:04:38,241 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-31 15:04:38,241 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-31 15:04:38,242 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-31 15:04:38,242 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-31 15:04:38,243 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-31 15:04:38,243 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-31 15:04:38,243 INFO L153 SettingsManager]: * Use SBE=true [2024-10-31 15:04:38,244 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-31 15:04:38,244 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-31 15:04:38,244 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-31 15:04:38,245 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-31 15:04:38,245 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-31 15:04:38,249 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-31 15:04:38,249 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-31 15:04:38,249 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-31 15:04:38,249 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-31 15:04:38,250 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-10-31 15:04:38,252 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-31 15:04:38,253 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-10-31 15:04:38,253 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-31 15:04:38,253 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-31 15:04:38,253 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-31 15:04:38,254 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-31 15:04:38,254 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-31 15:04:38,254 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-31 15:04:38,254 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-31 15:04:38,255 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 15:04:38,255 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-31 15:04:38,255 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-31 15:04:38,255 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-31 15:04:38,256 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2024-10-31 15:04:38,256 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-10-31 15:04:38,256 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-31 15:04:38,256 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-31 15:04:38,257 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-31 15:04:38,257 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-31 15:04:38,257 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2024-10-31 15:04:38,258 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Allow undefined functions -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol [2024-10-31 15:04:38,534 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-31 15:04:38,553 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-31 15:04:38,555 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-31 15:04:38,556 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-31 15:04:38,556 INFO L274 PluginConnector]: CDTParser initialized [2024-10-31 15:04:38,558 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/soft_float_3a.c.cil.c [2024-10-31 15:04:40,052 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-31 15:04:40,286 INFO L384 CDTParser]: Found 1 translation units. [2024-10-31 15:04:40,286 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/bitvector/soft_float_3a.c.cil.c [2024-10-31 15:04:40,296 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b7e9bc8ae/cb0c0418089f4c9c9fc11103dc9cfd81/FLAGae064cc4d [2024-10-31 15:04:40,307 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b7e9bc8ae/cb0c0418089f4c9c9fc11103dc9cfd81 [2024-10-31 15:04:40,309 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-31 15:04:40,310 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-10-31 15:04:40,311 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-31 15:04:40,311 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-31 15:04:40,315 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-31 15:04:40,315 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 03:04:40" (1/1) ... [2024-10-31 15:04:40,316 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f55f5d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 03:04:40, skipping insertion in model container [2024-10-31 15:04:40,316 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 03:04:40" (1/1) ... [2024-10-31 15:04:40,338 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-31 15:04:40,511 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_3a.c.cil.c[728,741] [2024-10-31 15:04:40,573 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 15:04:40,588 INFO L200 MainTranslator]: Completed pre-run [2024-10-31 15:04:40,599 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_3a.c.cil.c[728,741] [2024-10-31 15:04:40,638 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 15:04:40,659 INFO L204 MainTranslator]: Completed translation [2024-10-31 15:04:40,660 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 03:04:40 WrapperNode [2024-10-31 15:04:40,661 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-31 15:04:40,662 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-31 15:04:40,662 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-31 15:04:40,662 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-31 15:04:40,668 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 03:04:40" (1/1) ... [2024-10-31 15:04:40,678 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 03:04:40" (1/1) ... [2024-10-31 15:04:40,701 INFO L138 Inliner]: procedures = 17, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 113 [2024-10-31 15:04:40,703 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-31 15:04:40,703 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-31 15:04:40,703 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-31 15:04:40,704 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-31 15:04:40,714 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 03:04:40" (1/1) ... [2024-10-31 15:04:40,714 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 03:04:40" (1/1) ... [2024-10-31 15:04:40,719 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 03:04:40" (1/1) ... [2024-10-31 15:04:40,730 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 15:04:40,730 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 03:04:40" (1/1) ... [2024-10-31 15:04:40,730 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 03:04:40" (1/1) ... [2024-10-31 15:04:40,740 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 03:04:40" (1/1) ... [2024-10-31 15:04:40,747 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 03:04:40" (1/1) ... [2024-10-31 15:04:40,748 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 03:04:40" (1/1) ... [2024-10-31 15:04:40,749 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 03:04:40" (1/1) ... [2024-10-31 15:04:40,752 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-31 15:04:40,753 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-31 15:04:40,753 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-31 15:04:40,753 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-31 15:04:40,754 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 03:04:40" (1/1) ... [2024-10-31 15:04:40,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 15:04:40,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-31 15:04:40,782 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 15:04:40,784 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 15:04:40,803 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-31 15:04:40,803 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-10-31 15:04:40,803 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2024-10-31 15:04:40,803 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2024-10-31 15:04:40,803 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-31 15:04:40,803 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-31 15:04:40,803 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-10-31 15:04:40,804 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-10-31 15:04:40,864 INFO L238 CfgBuilder]: Building ICFG [2024-10-31 15:04:40,866 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-31 15:04:41,167 INFO L? ?]: Removed 48 outVars from TransFormulas that were not future-live. [2024-10-31 15:04:41,167 INFO L287 CfgBuilder]: Performing block encoding [2024-10-31 15:04:41,182 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-31 15:04:41,182 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-10-31 15:04:41,182 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 03:04:41 BoogieIcfgContainer [2024-10-31 15:04:41,183 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-31 15:04:41,185 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-31 15:04:41,185 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-31 15:04:41,188 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-31 15:04:41,188 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.10 03:04:40" (1/3) ... [2024-10-31 15:04:41,189 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28fdc71a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 03:04:41, skipping insertion in model container [2024-10-31 15:04:41,189 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 03:04:40" (2/3) ... [2024-10-31 15:04:41,189 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28fdc71a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 03:04:41, skipping insertion in model container [2024-10-31 15:04:41,190 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 03:04:41" (3/3) ... [2024-10-31 15:04:41,191 INFO L112 eAbstractionObserver]: Analyzing ICFG soft_float_3a.c.cil.c [2024-10-31 15:04:41,204 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-31 15:04:41,205 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-31 15:04:41,250 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-31 15:04:41,259 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;@32c3e48f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-31 15:04:41,259 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-31 15:04:41,263 INFO L276 IsEmpty]: Start isEmpty. Operand has 51 states, 42 states have (on average 1.5714285714285714) internal successors, (66), 44 states have internal predecessors, (66), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-10-31 15:04:41,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-10-31 15:04:41,272 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:04:41,273 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 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 15:04:41,274 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:04:41,280 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:04:41,281 INFO L85 PathProgramCache]: Analyzing trace with hash 1696138713, now seen corresponding path program 1 times [2024-10-31 15:04:41,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:04:41,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [991373312] [2024-10-31 15:04:41,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:04:41,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:04:41,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:04:41,449 INFO L255 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-31 15:04:41,460 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:04:41,534 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-31 15:04:41,535 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:04:41,629 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-10-31 15:04:41,630 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:04:41,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [991373312] [2024-10-31 15:04:41,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [991373312] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-31 15:04:41,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-31 15:04:41,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2024-10-31 15:04:41,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697943000] [2024-10-31 15:04:41,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 15:04:41,640 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 15:04:41,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:04:41,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 15:04:41,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-10-31 15:04:41,668 INFO L87 Difference]: Start difference. First operand has 51 states, 42 states have (on average 1.5714285714285714) internal successors, (66), 44 states have internal predecessors, (66), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-31 15:04:41,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:04:41,818 INFO L93 Difference]: Finished difference Result 113 states and 179 transitions. [2024-10-31 15:04:41,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 15:04:41,821 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 41 [2024-10-31 15:04:41,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:04:41,830 INFO L225 Difference]: With dead ends: 113 [2024-10-31 15:04:41,830 INFO L226 Difference]: Without dead ends: 59 [2024-10-31 15:04:41,833 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-10-31 15:04:41,839 INFO L432 NwaCegarLoop]: 59 mSDtfsCounter, 12 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 15:04:41,841 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 163 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 15:04:41,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-10-31 15:04:41,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 50. [2024-10-31 15:04:41,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 42 states have (on average 1.4047619047619047) internal successors, (59), 42 states have internal predecessors, (59), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-10-31 15:04:41,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 70 transitions. [2024-10-31 15:04:41,884 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 70 transitions. Word has length 41 [2024-10-31 15:04:41,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:04:41,885 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 70 transitions. [2024-10-31 15:04:41,885 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-31 15:04:41,885 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 70 transitions. [2024-10-31 15:04:41,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-10-31 15:04:41,889 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:04:41,889 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 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] [2024-10-31 15:04:41,890 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-31 15:04:41,890 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:04:41,890 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:04:41,891 INFO L85 PathProgramCache]: Analyzing trace with hash 1421820539, now seen corresponding path program 1 times [2024-10-31 15:04:41,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:04:41,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [504307664] [2024-10-31 15:04:41,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:04:41,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:04:42,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:04:42,041 INFO L255 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-31 15:04:42,044 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:04:42,135 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-10-31 15:04:42,135 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:04:42,237 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-10-31 15:04:42,238 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:04:42,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [504307664] [2024-10-31 15:04:42,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [504307664] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 15:04:42,239 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 15:04:42,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 7 [2024-10-31 15:04:42,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795197379] [2024-10-31 15:04:42,239 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 15:04:42,241 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-31 15:04:42,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:04:42,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-31 15:04:42,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-10-31 15:04:42,245 INFO L87 Difference]: Start difference. First operand 50 states and 70 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-31 15:04:42,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:04:42,326 INFO L93 Difference]: Finished difference Result 79 states and 117 transitions. [2024-10-31 15:04:42,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-31 15:04:42,329 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 44 [2024-10-31 15:04:42,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:04:42,331 INFO L225 Difference]: With dead ends: 79 [2024-10-31 15:04:42,331 INFO L226 Difference]: Without dead ends: 70 [2024-10-31 15:04:42,332 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 81 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 15:04:42,333 INFO L432 NwaCegarLoop]: 59 mSDtfsCounter, 14 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 15:04:42,334 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 343 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 15:04:42,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2024-10-31 15:04:42,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2024-10-31 15:04:42,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 58 states have (on average 1.4137931034482758) internal successors, (82), 58 states have internal predecessors, (82), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (15), 7 states have call predecessors, (15), 6 states have call successors, (15) [2024-10-31 15:04:42,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 104 transitions. [2024-10-31 15:04:42,389 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 104 transitions. Word has length 44 [2024-10-31 15:04:42,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:04:42,389 INFO L471 AbstractCegarLoop]: Abstraction has 69 states and 104 transitions. [2024-10-31 15:04:42,390 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-31 15:04:42,390 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 104 transitions. [2024-10-31 15:04:42,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-10-31 15:04:42,395 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:04:42,395 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 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] [2024-10-31 15:04:42,396 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-31 15:04:42,396 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:04:42,399 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:04:42,402 INFO L85 PathProgramCache]: Analyzing trace with hash -865634876, now seen corresponding path program 1 times [2024-10-31 15:04:42,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:04:42,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [667865619] [2024-10-31 15:04:42,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:04:42,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:04:42,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:04:42,483 INFO L255 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-31 15:04:42,488 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:04:42,535 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-31 15:04:42,535 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:04:42,628 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-10-31 15:04:42,629 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:04:42,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [667865619] [2024-10-31 15:04:42,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [667865619] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-31 15:04:42,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-31 15:04:42,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2024-10-31 15:04:42,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746641440] [2024-10-31 15:04:42,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 15:04:42,630 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 15:04:42,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:04:42,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 15:04:42,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-10-31 15:04:42,634 INFO L87 Difference]: Start difference. First operand 69 states and 104 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-31 15:04:42,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:04:42,725 INFO L93 Difference]: Finished difference Result 131 states and 200 transitions. [2024-10-31 15:04:42,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 15:04:42,726 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 45 [2024-10-31 15:04:42,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:04:42,728 INFO L225 Difference]: With dead ends: 131 [2024-10-31 15:04:42,728 INFO L226 Difference]: Without dead ends: 85 [2024-10-31 15:04:42,728 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-10-31 15:04:42,729 INFO L432 NwaCegarLoop]: 60 mSDtfsCounter, 16 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 15:04:42,730 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 159 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 15:04:42,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2024-10-31 15:04:42,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 73. [2024-10-31 15:04:42,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 61 states have (on average 1.3934426229508197) internal successors, (85), 62 states have internal predecessors, (85), 7 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (19), 7 states have call predecessors, (19), 6 states have call successors, (19) [2024-10-31 15:04:42,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 111 transitions. [2024-10-31 15:04:42,746 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 111 transitions. Word has length 45 [2024-10-31 15:04:42,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:04:42,747 INFO L471 AbstractCegarLoop]: Abstraction has 73 states and 111 transitions. [2024-10-31 15:04:42,747 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-31 15:04:42,747 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 111 transitions. [2024-10-31 15:04:42,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-10-31 15:04:42,749 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:04:42,749 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 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 15:04:42,749 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-31 15:04:42,749 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:04:42,750 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:04:42,750 INFO L85 PathProgramCache]: Analyzing trace with hash 1378959009, now seen corresponding path program 1 times [2024-10-31 15:04:42,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:04:42,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1121326627] [2024-10-31 15:04:42,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:04:42,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:04:42,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:04:42,820 INFO L255 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-31 15:04:42,824 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:04:42,871 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-10-31 15:04:42,871 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:04:42,928 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-31 15:04:42,929 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:04:42,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1121326627] [2024-10-31 15:04:42,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1121326627] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-31 15:04:42,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-31 15:04:42,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2024-10-31 15:04:42,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214370550] [2024-10-31 15:04:42,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 15:04:42,930 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 15:04:42,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:04:42,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 15:04:42,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-10-31 15:04:42,932 INFO L87 Difference]: Start difference. First operand 73 states and 111 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-31 15:04:42,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:04:42,958 INFO L93 Difference]: Finished difference Result 83 states and 122 transitions. [2024-10-31 15:04:42,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 15:04:42,959 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 46 [2024-10-31 15:04:42,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:04:42,960 INFO L225 Difference]: With dead ends: 83 [2024-10-31 15:04:42,961 INFO L226 Difference]: Without dead ends: 73 [2024-10-31 15:04:42,961 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 84 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 15:04:42,962 INFO L432 NwaCegarLoop]: 63 mSDtfsCounter, 0 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 15:04:42,964 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 183 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 15:04:42,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2024-10-31 15:04:42,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 54. [2024-10-31 15:04:42,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 45 states have (on average 1.3333333333333333) internal successors, (60), 46 states have internal predecessors, (60), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-10-31 15:04:42,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 73 transitions. [2024-10-31 15:04:42,976 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 73 transitions. Word has length 46 [2024-10-31 15:04:42,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:04:42,978 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 73 transitions. [2024-10-31 15:04:42,978 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-31 15:04:42,978 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 73 transitions. [2024-10-31 15:04:42,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-10-31 15:04:42,982 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:04:42,982 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 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 15:04:42,982 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-31 15:04:42,982 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:04:42,983 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:04:42,983 INFO L85 PathProgramCache]: Analyzing trace with hash 569612383, now seen corresponding path program 1 times [2024-10-31 15:04:42,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:04:42,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [240154304] [2024-10-31 15:04:42,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:04:42,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:04:43,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:04:43,061 INFO L255 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-31 15:04:43,067 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:04:43,140 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-10-31 15:04:43,141 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:04:43,212 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-10-31 15:04:43,212 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:04:43,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [240154304] [2024-10-31 15:04:43,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [240154304] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 15:04:43,213 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 15:04:43,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 7 [2024-10-31 15:04:43,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336271513] [2024-10-31 15:04:43,213 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 15:04:43,214 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-31 15:04:43,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:04:43,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-31 15:04:43,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-10-31 15:04:43,216 INFO L87 Difference]: Start difference. First operand 54 states and 73 transitions. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-31 15:04:43,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:04:43,281 INFO L93 Difference]: Finished difference Result 81 states and 114 transitions. [2024-10-31 15:04:43,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-31 15:04:43,282 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 46 [2024-10-31 15:04:43,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:04:43,283 INFO L225 Difference]: With dead ends: 81 [2024-10-31 15:04:43,283 INFO L226 Difference]: Without dead ends: 76 [2024-10-31 15:04:43,286 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 85 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 15:04:43,287 INFO L432 NwaCegarLoop]: 56 mSDtfsCounter, 14 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 15:04:43,287 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 325 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 15:04:43,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2024-10-31 15:04:43,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2024-10-31 15:04:43,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 64 states have (on average 1.34375) internal successors, (86), 65 states have internal predecessors, (86), 6 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2024-10-31 15:04:43,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 107 transitions. [2024-10-31 15:04:43,297 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 107 transitions. Word has length 46 [2024-10-31 15:04:43,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:04:43,298 INFO L471 AbstractCegarLoop]: Abstraction has 75 states and 107 transitions. [2024-10-31 15:04:43,298 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-31 15:04:43,298 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 107 transitions. [2024-10-31 15:04:43,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-10-31 15:04:43,299 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:04:43,299 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 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] [2024-10-31 15:04:43,300 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-31 15:04:43,300 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:04:43,300 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:04:43,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1536826811, now seen corresponding path program 1 times [2024-10-31 15:04:43,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:04:43,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [883764102] [2024-10-31 15:04:43,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:04:43,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:04:43,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:04:43,354 INFO L255 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-31 15:04:43,356 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:04:43,393 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-31 15:04:43,393 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:04:43,472 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-31 15:04:43,473 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:04:43,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [883764102] [2024-10-31 15:04:43,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [883764102] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 15:04:43,473 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 15:04:43,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2024-10-31 15:04:43,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833277940] [2024-10-31 15:04:43,473 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 15:04:43,474 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-31 15:04:43,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:04:43,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-31 15:04:43,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-10-31 15:04:43,475 INFO L87 Difference]: Start difference. First operand 75 states and 107 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-31 15:04:43,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:04:43,530 INFO L93 Difference]: Finished difference Result 96 states and 129 transitions. [2024-10-31 15:04:43,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 15:04:43,530 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 48 [2024-10-31 15:04:43,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:04:43,532 INFO L225 Difference]: With dead ends: 96 [2024-10-31 15:04:43,532 INFO L226 Difference]: Without dead ends: 90 [2024-10-31 15:04:43,533 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-10-31 15:04:43,535 INFO L432 NwaCegarLoop]: 57 mSDtfsCounter, 0 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 15:04:43,535 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 260 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 15:04:43,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2024-10-31 15:04:43,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2024-10-31 15:04:43,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 79 states have (on average 1.2911392405063291) internal successors, (102), 80 states have internal predecessors, (102), 6 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2024-10-31 15:04:43,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 123 transitions. [2024-10-31 15:04:43,543 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 123 transitions. Word has length 48 [2024-10-31 15:04:43,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:04:43,544 INFO L471 AbstractCegarLoop]: Abstraction has 90 states and 123 transitions. [2024-10-31 15:04:43,544 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-31 15:04:43,544 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 123 transitions. [2024-10-31 15:04:43,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-10-31 15:04:43,547 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:04:43,547 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 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] [2024-10-31 15:04:43,547 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-31 15:04:43,548 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:04:43,548 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:04:43,548 INFO L85 PathProgramCache]: Analyzing trace with hash -1479568509, now seen corresponding path program 1 times [2024-10-31 15:04:43,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:04:43,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1674825386] [2024-10-31 15:04:43,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:04:43,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:04:43,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:04:43,589 INFO L255 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-31 15:04:43,594 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:04:43,670 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-10-31 15:04:43,670 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:04:43,734 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-31 15:04:43,735 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:04:43,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1674825386] [2024-10-31 15:04:43,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1674825386] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-31 15:04:43,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-31 15:04:43,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 10 [2024-10-31 15:04:43,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900318014] [2024-10-31 15:04:43,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 15:04:43,736 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-31 15:04:43,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:04:43,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-31 15:04:43,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-10-31 15:04:43,737 INFO L87 Difference]: Start difference. First operand 90 states and 123 transitions. Second operand has 6 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-31 15:04:43,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:04:43,777 INFO L93 Difference]: Finished difference Result 96 states and 128 transitions. [2024-10-31 15:04:43,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-31 15:04:43,778 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 48 [2024-10-31 15:04:43,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:04:43,779 INFO L225 Difference]: With dead ends: 96 [2024-10-31 15:04:43,779 INFO L226 Difference]: Without dead ends: 82 [2024-10-31 15:04:43,779 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-10-31 15:04:43,780 INFO L432 NwaCegarLoop]: 60 mSDtfsCounter, 1 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 15:04:43,780 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 293 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 15:04:43,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2024-10-31 15:04:43,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2024-10-31 15:04:43,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 71 states have (on average 1.267605633802817) internal successors, (90), 72 states have internal predecessors, (90), 6 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2024-10-31 15:04:43,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 111 transitions. [2024-10-31 15:04:43,794 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 111 transitions. Word has length 48 [2024-10-31 15:04:43,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:04:43,794 INFO L471 AbstractCegarLoop]: Abstraction has 82 states and 111 transitions. [2024-10-31 15:04:43,795 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-31 15:04:43,795 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 111 transitions. [2024-10-31 15:04:43,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-10-31 15:04:43,800 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:04:43,800 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 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] [2024-10-31 15:04:43,800 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-10-31 15:04:43,800 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:04:43,800 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:04:43,801 INFO L85 PathProgramCache]: Analyzing trace with hash -680503610, now seen corresponding path program 1 times [2024-10-31 15:04:43,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:04:43,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [665663483] [2024-10-31 15:04:43,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:04:43,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:04:43,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:04:43,834 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-31 15:04:43,836 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:04:43,915 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-10-31 15:04:43,915 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:04:43,960 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-10-31 15:04:43,960 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:04:43,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [665663483] [2024-10-31 15:04:43,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [665663483] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 15:04:43,961 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 15:04:43,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2024-10-31 15:04:43,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291233202] [2024-10-31 15:04:43,961 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 15:04:43,961 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-31 15:04:43,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:04:43,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-31 15:04:43,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-10-31 15:04:43,962 INFO L87 Difference]: Start difference. First operand 82 states and 111 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-31 15:04:44,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:04:44,052 INFO L93 Difference]: Finished difference Result 90 states and 118 transitions. [2024-10-31 15:04:44,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-31 15:04:44,053 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 49 [2024-10-31 15:04:44,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:04:44,054 INFO L225 Difference]: With dead ends: 90 [2024-10-31 15:04:44,054 INFO L226 Difference]: Without dead ends: 64 [2024-10-31 15:04:44,054 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 90 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 15:04:44,055 INFO L432 NwaCegarLoop]: 56 mSDtfsCounter, 4 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 15:04:44,055 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 379 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 15:04:44,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2024-10-31 15:04:44,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2024-10-31 15:04:44,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 54 states have (on average 1.2592592592592593) internal successors, (68), 56 states have internal predecessors, (68), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2024-10-31 15:04:44,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 82 transitions. [2024-10-31 15:04:44,067 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 82 transitions. Word has length 49 [2024-10-31 15:04:44,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:04:44,067 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 82 transitions. [2024-10-31 15:04:44,067 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-31 15:04:44,067 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 82 transitions. [2024-10-31 15:04:44,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-10-31 15:04:44,068 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:04:44,068 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 15:04:44,068 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-10-31 15:04:44,068 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:04:44,069 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:04:44,069 INFO L85 PathProgramCache]: Analyzing trace with hash 1930391700, now seen corresponding path program 1 times [2024-10-31 15:04:44,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:04:44,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2031665499] [2024-10-31 15:04:44,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:04:44,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:04:44,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:04:44,184 INFO L255 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-31 15:04:44,191 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:04:44,248 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-10-31 15:04:44,248 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:04:44,351 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-10-31 15:04:44,352 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:04:44,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2031665499] [2024-10-31 15:04:44,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [2031665499] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 15:04:44,352 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 15:04:44,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 6] imperfect sequences [] total 8 [2024-10-31 15:04:44,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622179358] [2024-10-31 15:04:44,352 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 15:04:44,353 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-31 15:04:44,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:04:44,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-31 15:04:44,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-10-31 15:04:44,354 INFO L87 Difference]: Start difference. First operand 64 states and 82 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-31 15:04:44,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:04:44,418 INFO L93 Difference]: Finished difference Result 79 states and 97 transitions. [2024-10-31 15:04:44,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-31 15:04:44,419 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 50 [2024-10-31 15:04:44,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:04:44,420 INFO L225 Difference]: With dead ends: 79 [2024-10-31 15:04:44,420 INFO L226 Difference]: Without dead ends: 67 [2024-10-31 15:04:44,421 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-10-31 15:04:44,421 INFO L432 NwaCegarLoop]: 59 mSDtfsCounter, 6 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 15:04:44,421 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 222 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 15:04:44,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-10-31 15:04:44,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2024-10-31 15:04:44,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 55 states have (on average 1.2545454545454546) internal successors, (69), 57 states have internal predecessors, (69), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2024-10-31 15:04:44,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 83 transitions. [2024-10-31 15:04:44,432 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 83 transitions. Word has length 50 [2024-10-31 15:04:44,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:04:44,433 INFO L471 AbstractCegarLoop]: Abstraction has 65 states and 83 transitions. [2024-10-31 15:04:44,433 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-31 15:04:44,433 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 83 transitions. [2024-10-31 15:04:44,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-10-31 15:04:44,434 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:04:44,434 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 15:04:44,434 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-10-31 15:04:44,436 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:04:44,436 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:04:44,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1343585686, now seen corresponding path program 1 times [2024-10-31 15:04:44,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:04:44,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1983990663] [2024-10-31 15:04:44,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:04:44,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:04:44,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:04:44,554 INFO L255 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-31 15:04:44,556 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:04:44,591 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-31 15:04:44,592 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:04:44,660 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-10-31 15:04:44,661 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:04:44,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1983990663] [2024-10-31 15:04:44,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1983990663] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-31 15:04:44,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-31 15:04:44,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2024-10-31 15:04:44,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091170637] [2024-10-31 15:04:44,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 15:04:44,662 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 15:04:44,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:04:44,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 15:04:44,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-10-31 15:04:44,662 INFO L87 Difference]: Start difference. First operand 65 states and 83 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-31 15:04:44,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:04:44,707 INFO L93 Difference]: Finished difference Result 132 states and 169 transitions. [2024-10-31 15:04:44,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 15:04:44,708 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 50 [2024-10-31 15:04:44,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:04:44,710 INFO L225 Difference]: With dead ends: 132 [2024-10-31 15:04:44,710 INFO L226 Difference]: Without dead ends: 74 [2024-10-31 15:04:44,710 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-10-31 15:04:44,711 INFO L432 NwaCegarLoop]: 56 mSDtfsCounter, 7 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 15:04:44,711 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 151 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 15:04:44,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2024-10-31 15:04:44,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 70. [2024-10-31 15:04:44,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 59 states have (on average 1.2542372881355932) internal successors, (74), 62 states have internal predecessors, (74), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2024-10-31 15:04:44,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 89 transitions. [2024-10-31 15:04:44,723 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 89 transitions. Word has length 50 [2024-10-31 15:04:44,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:04:44,723 INFO L471 AbstractCegarLoop]: Abstraction has 70 states and 89 transitions. [2024-10-31 15:04:44,723 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-31 15:04:44,723 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 89 transitions. [2024-10-31 15:04:44,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-10-31 15:04:44,724 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:04:44,724 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 15:04:44,724 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-10-31 15:04:44,724 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:04:44,725 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:04:44,725 INFO L85 PathProgramCache]: Analyzing trace with hash -100773931, now seen corresponding path program 1 times [2024-10-31 15:04:44,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:04:44,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1000389992] [2024-10-31 15:04:44,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:04:44,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:04:44,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:04:44,863 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-31 15:04:44,865 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:04:44,899 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-31 15:04:44,899 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:04:44,982 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-10-31 15:04:44,982 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:04:44,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1000389992] [2024-10-31 15:04:44,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1000389992] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-31 15:04:44,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-31 15:04:44,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2024-10-31 15:04:44,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761184013] [2024-10-31 15:04:44,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 15:04:44,983 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 15:04:44,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:04:44,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 15:04:44,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-10-31 15:04:44,984 INFO L87 Difference]: Start difference. First operand 70 states and 89 transitions. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-31 15:04:45,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:04:45,079 INFO L93 Difference]: Finished difference Result 150 states and 193 transitions. [2024-10-31 15:04:45,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-31 15:04:45,079 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 52 [2024-10-31 15:04:45,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:04:45,080 INFO L225 Difference]: With dead ends: 150 [2024-10-31 15:04:45,080 INFO L226 Difference]: Without dead ends: 87 [2024-10-31 15:04:45,081 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2024-10-31 15:04:45,081 INFO L432 NwaCegarLoop]: 57 mSDtfsCounter, 14 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 15:04:45,081 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 204 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 15:04:45,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2024-10-31 15:04:45,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 71. [2024-10-31 15:04:45,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 60 states have (on average 1.2666666666666666) internal successors, (76), 63 states have internal predecessors, (76), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2024-10-31 15:04:45,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 91 transitions. [2024-10-31 15:04:45,087 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 91 transitions. Word has length 52 [2024-10-31 15:04:45,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:04:45,087 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 91 transitions. [2024-10-31 15:04:45,087 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-31 15:04:45,087 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 91 transitions. [2024-10-31 15:04:45,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-10-31 15:04:45,088 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:04:45,088 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 15:04:45,088 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-10-31 15:04:45,088 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:04:45,089 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:04:45,089 INFO L85 PathProgramCache]: Analyzing trace with hash 1073437282, now seen corresponding path program 1 times [2024-10-31 15:04:45,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:04:45,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1444348175] [2024-10-31 15:04:45,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:04:45,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:04:45,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:04:45,168 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-31 15:04:45,171 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:04:45,216 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 25 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-31 15:04:45,216 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:04:45,318 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-10-31 15:04:45,318 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:04:45,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1444348175] [2024-10-31 15:04:45,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1444348175] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 15:04:45,318 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 15:04:45,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2024-10-31 15:04:45,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156172486] [2024-10-31 15:04:45,319 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 15:04:45,319 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-31 15:04:45,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:04:45,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-31 15:04:45,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-10-31 15:04:45,320 INFO L87 Difference]: Start difference. First operand 71 states and 91 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 8 states have internal predecessors, (56), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-10-31 15:04:45,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:04:45,455 INFO L93 Difference]: Finished difference Result 159 states and 206 transitions. [2024-10-31 15:04:45,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-31 15:04:45,455 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 8 states have internal predecessors, (56), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 53 [2024-10-31 15:04:45,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:04:45,456 INFO L225 Difference]: With dead ends: 159 [2024-10-31 15:04:45,457 INFO L226 Difference]: Without dead ends: 95 [2024-10-31 15:04:45,457 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2024-10-31 15:04:45,458 INFO L432 NwaCegarLoop]: 59 mSDtfsCounter, 20 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 15:04:45,458 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 271 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 15:04:45,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2024-10-31 15:04:45,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 79. [2024-10-31 15:04:45,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 68 states have (on average 1.3088235294117647) internal successors, (89), 71 states have internal predecessors, (89), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2024-10-31 15:04:45,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 104 transitions. [2024-10-31 15:04:45,465 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 104 transitions. Word has length 53 [2024-10-31 15:04:45,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:04:45,465 INFO L471 AbstractCegarLoop]: Abstraction has 79 states and 104 transitions. [2024-10-31 15:04:45,465 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 8 states have internal predecessors, (56), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-10-31 15:04:45,465 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 104 transitions. [2024-10-31 15:04:45,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-10-31 15:04:45,466 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:04:45,466 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 15:04:45,466 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-10-31 15:04:45,466 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:04:45,467 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:04:45,467 INFO L85 PathProgramCache]: Analyzing trace with hash -2015352415, now seen corresponding path program 1 times [2024-10-31 15:04:45,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:04:45,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1907157674] [2024-10-31 15:04:45,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:04:45,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:04:45,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:04:45,792 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-31 15:04:45,794 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:04:45,840 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 26 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-31 15:04:45,840 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:04:45,967 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-10-31 15:04:45,968 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:04:45,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1907157674] [2024-10-31 15:04:45,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1907157674] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 15:04:45,968 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 15:04:45,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2024-10-31 15:04:45,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918582038] [2024-10-31 15:04:45,968 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 15:04:45,969 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-31 15:04:45,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:04:45,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-31 15:04:45,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-10-31 15:04:45,970 INFO L87 Difference]: Start difference. First operand 79 states and 104 transitions. Second operand has 10 states, 10 states have (on average 6.0) internal successors, (60), 10 states have internal predecessors, (60), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-10-31 15:04:46,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:04:46,228 INFO L93 Difference]: Finished difference Result 183 states and 241 transitions. [2024-10-31 15:04:46,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-31 15:04:46,229 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.0) internal successors, (60), 10 states have internal predecessors, (60), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 55 [2024-10-31 15:04:46,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:04:46,230 INFO L225 Difference]: With dead ends: 183 [2024-10-31 15:04:46,230 INFO L226 Difference]: Without dead ends: 111 [2024-10-31 15:04:46,231 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=129, Unknown=0, NotChecked=0, Total=210 [2024-10-31 15:04:46,231 INFO L432 NwaCegarLoop]: 59 mSDtfsCounter, 83 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-31 15:04:46,231 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 273 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-31 15:04:46,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2024-10-31 15:04:46,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 83. [2024-10-31 15:04:46,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 72 states have (on average 1.3333333333333333) internal successors, (96), 75 states have internal predecessors, (96), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2024-10-31 15:04:46,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 111 transitions. [2024-10-31 15:04:46,242 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 111 transitions. Word has length 55 [2024-10-31 15:04:46,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:04:46,242 INFO L471 AbstractCegarLoop]: Abstraction has 83 states and 111 transitions. [2024-10-31 15:04:46,243 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.0) internal successors, (60), 10 states have internal predecessors, (60), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-10-31 15:04:46,243 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 111 transitions. [2024-10-31 15:04:46,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-10-31 15:04:46,245 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:04:46,245 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 15:04:46,245 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-10-31 15:04:46,245 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:04:46,246 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:04:46,246 INFO L85 PathProgramCache]: Analyzing trace with hash 173315734, now seen corresponding path program 2 times [2024-10-31 15:04:46,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:04:46,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [75960445] [2024-10-31 15:04:46,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:04:46,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:04:46,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:04:46,483 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-31 15:04:46,485 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:04:46,635 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 25 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-31 15:04:46,635 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:04:47,038 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-10-31 15:04:47,038 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:04:47,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [75960445] [2024-10-31 15:04:47,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [75960445] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 15:04:47,039 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 15:04:47,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2024-10-31 15:04:47,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199609013] [2024-10-31 15:04:47,039 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 15:04:47,039 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-31 15:04:47,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:04:47,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-31 15:04:47,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2024-10-31 15:04:47,041 INFO L87 Difference]: Start difference. First operand 83 states and 111 transitions. Second operand has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-10-31 15:04:47,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:04:47,530 INFO L93 Difference]: Finished difference Result 194 states and 261 transitions. [2024-10-31 15:04:47,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-31 15:04:47,531 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 62 [2024-10-31 15:04:47,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:04:47,532 INFO L225 Difference]: With dead ends: 194 [2024-10-31 15:04:47,532 INFO L226 Difference]: Without dead ends: 118 [2024-10-31 15:04:47,533 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=117, Invalid=189, Unknown=0, NotChecked=0, Total=306 [2024-10-31 15:04:47,533 INFO L432 NwaCegarLoop]: 68 mSDtfsCounter, 63 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 435 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-31 15:04:47,533 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 435 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-31 15:04:47,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2024-10-31 15:04:47,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 97. [2024-10-31 15:04:47,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 86 states have (on average 1.3837209302325582) internal successors, (119), 89 states have internal predecessors, (119), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2024-10-31 15:04:47,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 134 transitions. [2024-10-31 15:04:47,545 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 134 transitions. Word has length 62 [2024-10-31 15:04:47,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:04:47,546 INFO L471 AbstractCegarLoop]: Abstraction has 97 states and 134 transitions. [2024-10-31 15:04:47,546 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-10-31 15:04:47,546 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 134 transitions. [2024-10-31 15:04:47,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-10-31 15:04:47,547 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:04:47,547 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 15:04:47,547 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-10-31 15:04:47,547 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:04:47,547 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:04:47,547 INFO L85 PathProgramCache]: Analyzing trace with hash 103329953, now seen corresponding path program 2 times [2024-10-31 15:04:47,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:04:47,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [310801780] [2024-10-31 15:04:47,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:04:47,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:04:47,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:04:47,811 INFO L255 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-31 15:04:47,813 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:04:47,955 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 26 proven. 45 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-31 15:04:47,955 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:04:48,283 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 4 proven. 55 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-10-31 15:04:48,284 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:04:48,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [310801780] [2024-10-31 15:04:48,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [310801780] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 15:04:48,284 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 15:04:48,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2024-10-31 15:04:48,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252188702] [2024-10-31 15:04:48,284 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 15:04:48,284 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-31 15:04:48,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:04:48,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-31 15:04:48,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2024-10-31 15:04:48,285 INFO L87 Difference]: Start difference. First operand 97 states and 134 transitions. Second operand has 18 states, 18 states have (on average 4.666666666666667) internal successors, (84), 18 states have internal predecessors, (84), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-10-31 15:04:49,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:04:49,075 INFO L93 Difference]: Finished difference Result 253 states and 341 transitions. [2024-10-31 15:04:49,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-10-31 15:04:49,075 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.666666666666667) internal successors, (84), 18 states have internal predecessors, (84), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 67 [2024-10-31 15:04:49,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:04:49,077 INFO L225 Difference]: With dead ends: 253 [2024-10-31 15:04:49,077 INFO L226 Difference]: Without dead ends: 163 [2024-10-31 15:04:49,078 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=325, Invalid=605, Unknown=0, NotChecked=0, Total=930 [2024-10-31 15:04:49,078 INFO L432 NwaCegarLoop]: 75 mSDtfsCounter, 253 mSDsluCounter, 555 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 630 SdHoareTripleChecker+Invalid, 499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-31 15:04:49,078 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [253 Valid, 630 Invalid, 499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 474 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-31 15:04:49,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2024-10-31 15:04:49,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 107. [2024-10-31 15:04:49,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 96 states have (on average 1.4166666666666667) internal successors, (136), 99 states have internal predecessors, (136), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2024-10-31 15:04:49,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 151 transitions. [2024-10-31 15:04:49,091 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 151 transitions. Word has length 67 [2024-10-31 15:04:49,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:04:49,091 INFO L471 AbstractCegarLoop]: Abstraction has 107 states and 151 transitions. [2024-10-31 15:04:49,091 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.666666666666667) internal successors, (84), 18 states have internal predecessors, (84), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-10-31 15:04:49,091 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 151 transitions. [2024-10-31 15:04:49,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2024-10-31 15:04:49,092 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:04:49,092 INFO L215 NwaCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 15:04:49,092 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-10-31 15:04:49,092 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:04:49,093 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:04:49,093 INFO L85 PathProgramCache]: Analyzing trace with hash -1524110314, now seen corresponding path program 3 times [2024-10-31 15:04:49,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:04:49,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1592521040] [2024-10-31 15:04:49,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:04:49,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:04:49,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:04:49,341 INFO L255 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-10-31 15:04:49,343 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:04:49,665 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 25 proven. 155 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-31 15:04:49,665 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:04:50,769 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 4 proven. 164 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-10-31 15:04:50,769 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:04:50,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1592521040] [2024-10-31 15:04:50,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1592521040] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 15:04:50,769 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 15:04:50,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2024-10-31 15:04:50,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565149351] [2024-10-31 15:04:50,770 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 15:04:50,770 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-10-31 15:04:50,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:04:50,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-10-31 15:04:50,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=457, Unknown=0, NotChecked=0, Total=650 [2024-10-31 15:04:50,771 INFO L87 Difference]: Start difference. First operand 107 states and 151 transitions. Second operand has 26 states, 26 states have (on average 4.230769230769231) internal successors, (110), 26 states have internal predecessors, (110), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-10-31 15:04:53,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:04:53,027 INFO L93 Difference]: Finished difference Result 266 states and 373 transitions. [2024-10-31 15:04:53,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-10-31 15:04:53,028 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.230769230769231) internal successors, (110), 26 states have internal predecessors, (110), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 80 [2024-10-31 15:04:53,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:04:53,030 INFO L225 Difference]: With dead ends: 266 [2024-10-31 15:04:53,030 INFO L226 Difference]: Without dead ends: 166 [2024-10-31 15:04:53,031 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=453, Invalid=807, Unknown=0, NotChecked=0, Total=1260 [2024-10-31 15:04:53,032 INFO L432 NwaCegarLoop]: 86 mSDtfsCounter, 195 mSDsluCounter, 1065 mSDsCounter, 0 mSdLazyCounter, 634 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 1151 SdHoareTripleChecker+Invalid, 669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-10-31 15:04:53,032 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 1151 Invalid, 669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 634 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-10-31 15:04:53,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2024-10-31 15:04:53,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 133. [2024-10-31 15:04:53,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 122 states have (on average 1.4672131147540983) internal successors, (179), 125 states have internal predecessors, (179), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2024-10-31 15:04:53,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 194 transitions. [2024-10-31 15:04:53,045 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 194 transitions. Word has length 80 [2024-10-31 15:04:53,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:04:53,046 INFO L471 AbstractCegarLoop]: Abstraction has 133 states and 194 transitions. [2024-10-31 15:04:53,046 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.230769230769231) internal successors, (110), 26 states have internal predecessors, (110), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-10-31 15:04:53,046 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 194 transitions. [2024-10-31 15:04:53,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2024-10-31 15:04:53,047 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:04:53,047 INFO L215 NwaCegarLoop]: trace histogram [14, 14, 13, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 15:04:53,047 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-10-31 15:04:53,047 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:04:53,047 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:04:53,048 INFO L85 PathProgramCache]: Analyzing trace with hash 264388257, now seen corresponding path program 3 times [2024-10-31 15:04:53,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:04:53,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [563300484] [2024-10-31 15:04:53,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:04:53,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:04:53,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:04:53,497 INFO L255 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-10-31 15:04:53,500 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:04:53,875 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 26 proven. 273 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-31 15:04:53,875 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:04:54,862 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 4 proven. 283 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-10-31 15:04:54,862 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:04:54,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [563300484] [2024-10-31 15:04:54,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [563300484] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 15:04:54,863 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 15:04:54,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2024-10-31 15:04:54,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357558947] [2024-10-31 15:04:54,863 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 15:04:54,863 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-10-31 15:04:54,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:04:54,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-10-31 15:04:54,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2024-10-31 15:04:54,865 INFO L87 Difference]: Start difference. First operand 133 states and 194 transitions. Second operand has 34 states, 34 states have (on average 3.8823529411764706) internal successors, (132), 34 states have internal predecessors, (132), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-10-31 15:04:56,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:04:56,848 INFO L93 Difference]: Finished difference Result 357 states and 487 transitions. [2024-10-31 15:04:56,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2024-10-31 15:04:56,849 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.8823529411764706) internal successors, (132), 34 states have internal predecessors, (132), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 91 [2024-10-31 15:04:56,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:04:56,850 INFO L225 Difference]: With dead ends: 357 [2024-10-31 15:04:56,850 INFO L226 Difference]: Without dead ends: 231 [2024-10-31 15:04:56,854 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=936, Invalid=2256, Unknown=0, NotChecked=0, Total=3192 [2024-10-31 15:04:56,855 INFO L432 NwaCegarLoop]: 107 mSDtfsCounter, 531 mSDsluCounter, 1542 mSDsCounter, 0 mSdLazyCounter, 1530 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 531 SdHoareTripleChecker+Valid, 1649 SdHoareTripleChecker+Invalid, 1570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-10-31 15:04:56,855 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [531 Valid, 1649 Invalid, 1570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1530 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-10-31 15:04:56,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2024-10-31 15:04:56,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 137. [2024-10-31 15:04:56,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 126 states have (on average 1.4761904761904763) internal successors, (186), 129 states have internal predecessors, (186), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2024-10-31 15:04:56,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 201 transitions. [2024-10-31 15:04:56,890 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 201 transitions. Word has length 91 [2024-10-31 15:04:56,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:04:56,890 INFO L471 AbstractCegarLoop]: Abstraction has 137 states and 201 transitions. [2024-10-31 15:04:56,890 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.8823529411764706) internal successors, (132), 34 states have internal predecessors, (132), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-10-31 15:04:56,890 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 201 transitions. [2024-10-31 15:04:56,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2024-10-31 15:04:56,892 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:04:56,893 INFO L215 NwaCegarLoop]: trace histogram [23, 22, 22, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 15:04:56,893 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-10-31 15:04:56,893 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:04:56,893 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:04:56,893 INFO L85 PathProgramCache]: Analyzing trace with hash 861370134, now seen corresponding path program 4 times [2024-10-31 15:04:56,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:04:56,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1010090837] [2024-10-31 15:04:56,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:04:56,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:04:57,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:04:57,328 INFO L255 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-10-31 15:04:57,331 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:04:58,160 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 25 proven. 737 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-31 15:04:58,160 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:05:00,738 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 4 proven. 746 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-10-31 15:05:00,738 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:05:00,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1010090837] [2024-10-31 15:05:00,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1010090837] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 15:05:00,738 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 15:05:00,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2024-10-31 15:05:00,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638267457] [2024-10-31 15:05:00,739 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 15:05:00,739 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-10-31 15:05:00,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:05:00,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-10-31 15:05:00,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=673, Invalid=1777, Unknown=0, NotChecked=0, Total=2450 [2024-10-31 15:05:00,741 INFO L87 Difference]: Start difference. First operand 137 states and 201 transitions. Second operand has 50 states, 50 states have (on average 3.64) internal successors, (182), 50 states have internal predecessors, (182), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-10-31 15:05:08,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:05:08,920 INFO L93 Difference]: Finished difference Result 392 states and 567 transitions. [2024-10-31 15:05:08,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2024-10-31 15:05:08,921 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.64) internal successors, (182), 50 states have internal predecessors, (182), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 116 [2024-10-31 15:05:08,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:05:08,923 INFO L225 Difference]: With dead ends: 392 [2024-10-31 15:05:08,923 INFO L226 Difference]: Without dead ends: 262 [2024-10-31 15:05:08,929 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=1773, Invalid=3339, Unknown=0, NotChecked=0, Total=5112 [2024-10-31 15:05:08,929 INFO L432 NwaCegarLoop]: 122 mSDtfsCounter, 771 mSDsluCounter, 2887 mSDsCounter, 0 mSdLazyCounter, 2058 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 771 SdHoareTripleChecker+Valid, 3009 SdHoareTripleChecker+Invalid, 2121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 2058 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-10-31 15:05:08,930 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [771 Valid, 3009 Invalid, 2121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 2058 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-10-31 15:05:08,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2024-10-31 15:05:08,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 205. [2024-10-31 15:05:08,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 194 states have (on average 1.541237113402062) internal successors, (299), 197 states have internal predecessors, (299), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2024-10-31 15:05:08,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 314 transitions. [2024-10-31 15:05:08,948 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 314 transitions. Word has length 116 [2024-10-31 15:05:08,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:05:08,949 INFO L471 AbstractCegarLoop]: Abstraction has 205 states and 314 transitions. [2024-10-31 15:05:08,949 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.64) internal successors, (182), 50 states have internal predecessors, (182), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-10-31 15:05:08,949 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 314 transitions. [2024-10-31 15:05:08,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2024-10-31 15:05:08,950 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:05:08,950 INFO L215 NwaCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 15:05:08,951 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-10-31 15:05:08,951 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:05:08,951 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:05:08,951 INFO L85 PathProgramCache]: Analyzing trace with hash 1180573729, now seen corresponding path program 4 times [2024-10-31 15:05:08,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:05:08,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1405240918] [2024-10-31 15:05:08,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:05:08,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:05:20,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:05:20,606 INFO L255 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 63 conjuncts are in the unsatisfiable core [2024-10-31 15:05:20,612 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:05:22,500 INFO L134 CoverageAnalysis]: Checked inductivity of 860 backedges. 10 proven. 838 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-31 15:05:22,500 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:05:26,240 INFO L134 CoverageAnalysis]: Checked inductivity of 860 backedges. 10 proven. 838 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-31 15:05:26,240 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:05:26,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1405240918] [2024-10-31 15:05:26,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1405240918] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 15:05:26,240 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 15:05:26,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 66 [2024-10-31 15:05:26,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946261742] [2024-10-31 15:05:26,241 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 15:05:26,241 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2024-10-31 15:05:26,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:05:26,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2024-10-31 15:05:26,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=766, Invalid=3524, Unknown=0, NotChecked=0, Total=4290 [2024-10-31 15:05:26,243 INFO L87 Difference]: Start difference. First operand 205 states and 314 transitions. Second operand has 66 states, 66 states have (on average 2.9393939393939394) internal successors, (194), 62 states have internal predecessors, (194), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 3 states have call successors, (7) [2024-10-31 15:05:41,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:05:41,961 INFO L93 Difference]: Finished difference Result 380 states and 567 transitions. [2024-10-31 15:05:41,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2024-10-31 15:05:41,962 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.9393939393939394) internal successors, (194), 62 states have internal predecessors, (194), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 3 states have call successors, (7) Word has length 121 [2024-10-31 15:05:41,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:05:41,965 INFO L225 Difference]: With dead ends: 380 [2024-10-31 15:05:41,965 INFO L226 Difference]: Without dead ends: 333 [2024-10-31 15:05:41,968 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 176 SyntacticMatches, 1 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 818 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=2338, Invalid=6782, Unknown=0, NotChecked=0, Total=9120 [2024-10-31 15:05:41,968 INFO L432 NwaCegarLoop]: 93 mSDtfsCounter, 1025 mSDsluCounter, 3280 mSDsCounter, 0 mSdLazyCounter, 6161 mSolverCounterSat, 783 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1029 SdHoareTripleChecker+Valid, 3373 SdHoareTripleChecker+Invalid, 6944 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 783 IncrementalHoareTripleChecker+Valid, 6161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2024-10-31 15:05:41,968 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1029 Valid, 3373 Invalid, 6944 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [783 Valid, 6161 Invalid, 0 Unknown, 0 Unchecked, 6.4s Time] [2024-10-31 15:05:41,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2024-10-31 15:05:42,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 223. [2024-10-31 15:05:42,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 209 states have (on average 1.5358851674641147) internal successors, (321), 213 states have internal predecessors, (321), 7 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2024-10-31 15:05:42,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 347 transitions. [2024-10-31 15:05:42,004 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 347 transitions. Word has length 121 [2024-10-31 15:05:42,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:05:42,004 INFO L471 AbstractCegarLoop]: Abstraction has 223 states and 347 transitions. [2024-10-31 15:05:42,004 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.9393939393939394) internal successors, (194), 62 states have internal predecessors, (194), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 3 states have call successors, (7) [2024-10-31 15:05:42,004 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 347 transitions. [2024-10-31 15:05:42,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2024-10-31 15:05:42,005 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:05:42,006 INFO L215 NwaCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 15:05:42,006 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-10-31 15:05:42,006 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:05:42,006 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:05:42,006 INFO L85 PathProgramCache]: Analyzing trace with hash 888006796, now seen corresponding path program 5 times [2024-10-31 15:05:42,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:05:42,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1695342867] [2024-10-31 15:05:42,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:05:42,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms