/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 External_ModelsAndUnsatCoreMode --traceabstraction.command.for.external.solver 'z3 -smt2 -in SMTLIB2_COMPLIANT=true' -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Bitvector.epf -i ../../../trunk/examples/svcomp/bitvector/soft_float_1-2a.c.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.5-dev-356b6ba-m [2024-10-31 17:25:06,811 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-31 17:25:06,871 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 17:25:06,917 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-31 17:25:06,918 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-31 17:25:06,918 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-31 17:25:06,918 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-31 17:25:06,918 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-31 17:25:06,919 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-31 17:25:06,919 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-31 17:25:06,919 INFO L153 SettingsManager]: * Use SBE=true [2024-10-31 17:25:06,920 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-31 17:25:06,920 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-31 17:25:06,922 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-31 17:25:06,922 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-31 17:25:06,923 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-31 17:25:06,923 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-31 17:25:06,923 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-31 17:25:06,923 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-31 17:25:06,924 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-31 17:25:06,924 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-10-31 17:25:06,925 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-31 17:25:06,925 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-10-31 17:25:06,926 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-31 17:25:06,926 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-31 17:25:06,926 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-31 17:25:06,926 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-31 17:25:06,926 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-31 17:25:06,927 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-31 17:25:06,927 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-31 17:25:06,927 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 17:25:06,927 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-31 17:25:06,927 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-31 17:25:06,928 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-31 17:25:06,928 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2024-10-31 17:25:06,929 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-10-31 17:25:06,929 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-31 17:25:06,929 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-31 17:25:06,930 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-31 17:25:06,930 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-31 17:25:06,931 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2024-10-31 17:25:06,931 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Allow undefined functions -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Command for external solver -> z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 17:25:07,210 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-31 17:25:07,228 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-31 17:25:07,230 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-31 17:25:07,231 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-31 17:25:07,231 INFO L274 PluginConnector]: CDTParser initialized [2024-10-31 17:25:07,232 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/soft_float_1-2a.c.cil.c [2024-10-31 17:25:08,539 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-31 17:25:08,714 INFO L384 CDTParser]: Found 1 translation units. [2024-10-31 17:25:08,715 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/bitvector/soft_float_1-2a.c.cil.c [2024-10-31 17:25:08,720 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef995075b/8eac23e7dc244a7db1b6eb256be2adea/FLAG5cb82a675 [2024-10-31 17:25:08,729 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef995075b/8eac23e7dc244a7db1b6eb256be2adea [2024-10-31 17:25:08,730 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-31 17:25:08,731 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-10-31 17:25:08,732 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-31 17:25:08,732 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-31 17:25:08,735 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-31 17:25:08,735 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 05:25:08" (1/1) ... [2024-10-31 17:25:08,736 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d9afa23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 05:25:08, skipping insertion in model container [2024-10-31 17:25:08,736 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 05:25:08" (1/1) ... [2024-10-31 17:25:08,752 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-31 17:25:08,853 WARN L251 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/bitvector/soft_float_1-2a.c.cil.c[755,768] [2024-10-31 17:25:08,893 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 17:25:08,908 INFO L200 MainTranslator]: Completed pre-run [2024-10-31 17:25:08,920 WARN L251 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/bitvector/soft_float_1-2a.c.cil.c[755,768] [2024-10-31 17:25:08,950 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 17:25:08,970 INFO L204 MainTranslator]: Completed translation [2024-10-31 17:25:08,970 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 05:25:08 WrapperNode [2024-10-31 17:25:08,970 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-31 17:25:08,971 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-31 17:25:08,971 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-31 17:25:08,971 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-31 17:25:08,976 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 05:25:08" (1/1) ... [2024-10-31 17:25:08,985 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 05:25:08" (1/1) ... [2024-10-31 17:25:09,004 INFO L138 Inliner]: procedures = 17, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 149 [2024-10-31 17:25:09,005 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-31 17:25:09,005 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-31 17:25:09,005 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-31 17:25:09,006 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-31 17:25:09,013 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 05:25:08" (1/1) ... [2024-10-31 17:25:09,013 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 05:25:08" (1/1) ... [2024-10-31 17:25:09,018 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 05:25:08" (1/1) ... [2024-10-31 17:25:09,036 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 17:25:09,036 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 05:25:08" (1/1) ... [2024-10-31 17:25:09,036 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 05:25:08" (1/1) ... [2024-10-31 17:25:09,043 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 05:25:08" (1/1) ... [2024-10-31 17:25:09,049 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 05:25:08" (1/1) ... [2024-10-31 17:25:09,050 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 05:25:08" (1/1) ... [2024-10-31 17:25:09,051 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 05:25:08" (1/1) ... [2024-10-31 17:25:09,054 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-31 17:25:09,055 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-31 17:25:09,055 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-31 17:25:09,055 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-31 17:25:09,055 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 05:25:08" (1/1) ... [2024-10-31 17:25:09,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 17:25:09,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-31 17:25:09,093 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 17:25:09,095 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 17:25:09,115 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-31 17:25:09,115 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-10-31 17:25:09,115 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2024-10-31 17:25:09,116 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2024-10-31 17:25:09,116 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-31 17:25:09,116 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-31 17:25:09,116 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-10-31 17:25:09,116 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-10-31 17:25:09,175 INFO L238 CfgBuilder]: Building ICFG [2024-10-31 17:25:09,180 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-31 17:25:09,464 INFO L? ?]: Removed 55 outVars from TransFormulas that were not future-live. [2024-10-31 17:25:09,464 INFO L287 CfgBuilder]: Performing block encoding [2024-10-31 17:25:09,478 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-31 17:25:09,478 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-10-31 17:25:09,479 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 05:25:09 BoogieIcfgContainer [2024-10-31 17:25:09,479 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-31 17:25:09,481 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-31 17:25:09,481 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-31 17:25:09,483 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-31 17:25:09,483 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.10 05:25:08" (1/3) ... [2024-10-31 17:25:09,484 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17ca8a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 05:25:09, skipping insertion in model container [2024-10-31 17:25:09,484 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 05:25:08" (2/3) ... [2024-10-31 17:25:09,484 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17ca8a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 05:25:09, skipping insertion in model container [2024-10-31 17:25:09,485 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 05:25:09" (3/3) ... [2024-10-31 17:25:09,486 INFO L112 eAbstractionObserver]: Analyzing ICFG soft_float_1-2a.c.cil.c [2024-10-31 17:25:09,496 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-31 17:25:09,497 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-31 17:25:09,536 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-31 17:25:09,540 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;@413dd4a3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-31 17:25:09,541 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-31 17:25:09,546 INFO L276 IsEmpty]: Start isEmpty. Operand has 72 states, 60 states have (on average 1.6) internal successors, (96), 63 states have internal predecessors, (96), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-10-31 17:25:09,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-10-31 17:25:09,552 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 17:25:09,552 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 17:25:09,553 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 17:25:09,556 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 17:25:09,556 INFO L85 PathProgramCache]: Analyzing trace with hash -760882007, now seen corresponding path program 1 times [2024-10-31 17:25:09,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 17:25:09,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1465604722] [2024-10-31 17:25:09,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 17:25:09,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 17:25:09,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-31 17:25:09,566 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 17:25:09,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-31 17:25:09,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 17:25:09,645 INFO L255 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-31 17:25:09,652 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 17:25:09,767 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-31 17:25:09,767 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 17:25:09,841 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-31 17:25:09,842 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 17:25:09,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1465604722] [2024-10-31 17:25:09,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1465604722] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 17:25:09,842 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 17:25:09,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2024-10-31 17:25:09,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007003765] [2024-10-31 17:25:09,844 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 17:25:09,847 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-31 17:25:09,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 17:25:09,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-31 17:25:09,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-10-31 17:25:09,863 INFO L87 Difference]: Start difference. First operand has 72 states, 60 states have (on average 1.6) internal successors, (96), 63 states have internal predecessors, (96), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-31 17:25:10,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 17:25:10,034 INFO L93 Difference]: Finished difference Result 175 states and 288 transitions. [2024-10-31 17:25:10,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-31 17:25:10,042 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 32 [2024-10-31 17:25:10,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 17:25:10,050 INFO L225 Difference]: With dead ends: 175 [2024-10-31 17:25:10,050 INFO L226 Difference]: Without dead ends: 100 [2024-10-31 17:25:10,052 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-10-31 17:25:10,058 INFO L432 NwaCegarLoop]: 91 mSDtfsCounter, 33 mSDsluCounter, 532 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 623 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 17:25:10,059 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 623 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 17:25:10,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2024-10-31 17:25:10,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 98. [2024-10-31 17:25:10,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 83 states have (on average 1.4698795180722892) internal successors, (122), 86 states have internal predecessors, (122), 11 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (14), 11 states have call predecessors, (14), 10 states have call successors, (14) [2024-10-31 17:25:10,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 147 transitions. [2024-10-31 17:25:10,095 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 147 transitions. Word has length 32 [2024-10-31 17:25:10,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 17:25:10,096 INFO L471 AbstractCegarLoop]: Abstraction has 98 states and 147 transitions. [2024-10-31 17:25:10,096 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-31 17:25:10,096 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 147 transitions. [2024-10-31 17:25:10,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-10-31 17:25:10,098 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 17:25:10,098 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 17:25:10,114 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-31 17:25:10,302 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 17:25:10,303 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 17:25:10,304 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 17:25:10,304 INFO L85 PathProgramCache]: Analyzing trace with hash 1139634014, now seen corresponding path program 1 times [2024-10-31 17:25:10,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 17:25:10,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1113810201] [2024-10-31 17:25:10,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 17:25:10,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 17:25:10,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-31 17:25:10,307 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 17:25:10,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-31 17:25:10,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 17:25:10,403 INFO L255 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-31 17:25:10,405 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 17:25:10,448 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-31 17:25:10,448 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 17:25:10,485 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-31 17:25:10,485 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 17:25:10,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1113810201] [2024-10-31 17:25:10,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1113810201] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 17:25:10,486 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 17:25:10,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2024-10-31 17:25:10,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472634539] [2024-10-31 17:25:10,486 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 17:25:10,487 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-31 17:25:10,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 17:25:10,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-31 17:25:10,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-10-31 17:25:10,488 INFO L87 Difference]: Start difference. First operand 98 states and 147 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-31 17:25:10,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 17:25:10,559 INFO L93 Difference]: Finished difference Result 181 states and 277 transitions. [2024-10-31 17:25:10,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-31 17:25:10,561 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2024-10-31 17:25:10,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 17:25:10,563 INFO L225 Difference]: With dead ends: 181 [2024-10-31 17:25:10,563 INFO L226 Difference]: Without dead ends: 116 [2024-10-31 17:25:10,564 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-10-31 17:25:10,565 INFO L432 NwaCegarLoop]: 102 mSDtfsCounter, 5 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 492 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 17:25:10,565 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 492 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 17:25:10,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2024-10-31 17:25:10,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 114. [2024-10-31 17:25:10,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 96 states have (on average 1.4166666666666667) internal successors, (136), 97 states have internal predecessors, (136), 14 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (20), 16 states have call predecessors, (20), 13 states have call successors, (20) [2024-10-31 17:25:10,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 170 transitions. [2024-10-31 17:25:10,577 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 170 transitions. Word has length 36 [2024-10-31 17:25:10,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 17:25:10,577 INFO L471 AbstractCegarLoop]: Abstraction has 114 states and 170 transitions. [2024-10-31 17:25:10,577 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-31 17:25:10,577 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 170 transitions. [2024-10-31 17:25:10,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-10-31 17:25:10,593 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 17:25:10,593 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 17:25:10,614 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-31 17:25:10,794 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 17:25:10,795 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 17:25:10,798 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 17:25:10,799 INFO L85 PathProgramCache]: Analyzing trace with hash -1018252548, now seen corresponding path program 1 times [2024-10-31 17:25:10,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 17:25:10,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [434733005] [2024-10-31 17:25:10,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 17:25:10,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 17:25:10,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-31 17:25:10,801 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 17:25:10,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-31 17:25:10,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 17:25:10,853 INFO L255 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-31 17:25:10,854 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 17:25:10,888 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-31 17:25:10,888 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 17:25:10,925 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-31 17:25:10,925 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 17:25:10,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [434733005] [2024-10-31 17:25:10,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [434733005] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 17:25:10,926 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 17:25:10,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 6 [2024-10-31 17:25:10,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123740721] [2024-10-31 17:25:10,926 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 17:25:10,927 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-31 17:25:10,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 17:25:10,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-31 17:25:10,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-10-31 17:25:10,928 INFO L87 Difference]: Start difference. First operand 114 states and 170 transitions. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-31 17:25:11,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 17:25:11,006 INFO L93 Difference]: Finished difference Result 250 states and 374 transitions. [2024-10-31 17:25:11,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-31 17:25:11,007 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 40 [2024-10-31 17:25:11,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 17:25:11,008 INFO L225 Difference]: With dead ends: 250 [2024-10-31 17:25:11,008 INFO L226 Difference]: Without dead ends: 189 [2024-10-31 17:25:11,009 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-10-31 17:25:11,010 INFO L432 NwaCegarLoop]: 89 mSDtfsCounter, 46 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 435 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 17:25:11,013 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 435 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 17:25:11,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2024-10-31 17:25:11,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 187. [2024-10-31 17:25:11,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 163 states have (on average 1.4049079754601228) internal successors, (229), 162 states have internal predecessors, (229), 20 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (26), 26 states have call predecessors, (26), 19 states have call successors, (26) [2024-10-31 17:25:11,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 275 transitions. [2024-10-31 17:25:11,028 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 275 transitions. Word has length 40 [2024-10-31 17:25:11,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 17:25:11,028 INFO L471 AbstractCegarLoop]: Abstraction has 187 states and 275 transitions. [2024-10-31 17:25:11,029 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-31 17:25:11,029 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 275 transitions. [2024-10-31 17:25:11,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-10-31 17:25:11,030 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 17:25:11,030 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 17:25:11,044 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-31 17:25:11,234 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 17:25:11,235 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 17:25:11,235 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 17:25:11,235 INFO L85 PathProgramCache]: Analyzing trace with hash -338194178, now seen corresponding path program 1 times [2024-10-31 17:25:11,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 17:25:11,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1861405153] [2024-10-31 17:25:11,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 17:25:11,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 17:25:11,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-31 17:25:11,238 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 17:25:11,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-31 17:25:11,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 17:25:11,310 INFO L255 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-31 17:25:11,311 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 17:25:11,356 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-31 17:25:11,357 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 17:25:11,393 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-31 17:25:11,394 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 17:25:11,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1861405153] [2024-10-31 17:25:11,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1861405153] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 17:25:11,394 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 17:25:11,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 7 [2024-10-31 17:25:11,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401256662] [2024-10-31 17:25:11,394 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 17:25:11,395 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-31 17:25:11,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 17:25:11,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-31 17:25:11,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-10-31 17:25:11,396 INFO L87 Difference]: Start difference. First operand 187 states and 275 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-31 17:25:11,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 17:25:11,478 INFO L93 Difference]: Finished difference Result 235 states and 344 transitions. [2024-10-31 17:25:11,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-31 17:25:11,479 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 40 [2024-10-31 17:25:11,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 17:25:11,480 INFO L225 Difference]: With dead ends: 235 [2024-10-31 17:25:11,481 INFO L226 Difference]: Without dead ends: 180 [2024-10-31 17:25:11,481 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-10-31 17:25:11,482 INFO L432 NwaCegarLoop]: 87 mSDtfsCounter, 33 mSDsluCounter, 424 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 17:25:11,482 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 511 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 17:25:11,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2024-10-31 17:25:11,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 178. [2024-10-31 17:25:11,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 156 states have (on average 1.3846153846153846) internal successors, (216), 155 states have internal predecessors, (216), 18 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (24), 24 states have call predecessors, (24), 17 states have call successors, (24) [2024-10-31 17:25:11,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 258 transitions. [2024-10-31 17:25:11,501 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 258 transitions. Word has length 40 [2024-10-31 17:25:11,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 17:25:11,501 INFO L471 AbstractCegarLoop]: Abstraction has 178 states and 258 transitions. [2024-10-31 17:25:11,501 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-31 17:25:11,502 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 258 transitions. [2024-10-31 17:25:11,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-10-31 17:25:11,505 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 17:25:11,506 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 17:25:11,526 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-31 17:25:11,706 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 17:25:11,706 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 17:25:11,707 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 17:25:11,707 INFO L85 PathProgramCache]: Analyzing trace with hash -2082074321, now seen corresponding path program 1 times [2024-10-31 17:25:11,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 17:25:11,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1377261892] [2024-10-31 17:25:11,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 17:25:11,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 17:25:11,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-31 17:25:11,710 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 17:25:11,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-31 17:25:11,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 17:25:11,756 INFO L255 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-31 17:25:11,757 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 17:25:11,779 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-31 17:25:11,779 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 17:25:11,821 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-31 17:25:11,821 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 17:25:11,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1377261892] [2024-10-31 17:25:11,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1377261892] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 17:25:11,821 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 17:25:11,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2024-10-31 17:25:11,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294069388] [2024-10-31 17:25:11,822 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 17:25:11,822 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-31 17:25:11,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 17:25:11,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-31 17:25:11,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-31 17:25:11,823 INFO L87 Difference]: Start difference. First operand 178 states and 258 transitions. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-31 17:25:11,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 17:25:11,880 INFO L93 Difference]: Finished difference Result 310 states and 451 transitions. [2024-10-31 17:25:11,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 17:25:11,880 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 43 [2024-10-31 17:25:11,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 17:25:11,882 INFO L225 Difference]: With dead ends: 310 [2024-10-31 17:25:11,882 INFO L226 Difference]: Without dead ends: 244 [2024-10-31 17:25:11,883 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-31 17:25:11,885 INFO L432 NwaCegarLoop]: 112 mSDtfsCounter, 30 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 520 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 17:25:11,886 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 520 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 17:25:11,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2024-10-31 17:25:11,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 242. [2024-10-31 17:25:11,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 220 states have (on average 1.3227272727272728) internal successors, (291), 217 states have internal predecessors, (291), 18 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (24), 24 states have call predecessors, (24), 17 states have call successors, (24) [2024-10-31 17:25:11,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 333 transitions. [2024-10-31 17:25:11,901 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 333 transitions. Word has length 43 [2024-10-31 17:25:11,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 17:25:11,901 INFO L471 AbstractCegarLoop]: Abstraction has 242 states and 333 transitions. [2024-10-31 17:25:11,901 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-31 17:25:11,902 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 333 transitions. [2024-10-31 17:25:11,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-10-31 17:25:11,903 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 17:25:11,903 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 17:25:11,918 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-31 17:25:12,103 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 17:25:12,104 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 17:25:12,104 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 17:25:12,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1563397194, now seen corresponding path program 1 times [2024-10-31 17:25:12,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 17:25:12,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [124102424] [2024-10-31 17:25:12,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 17:25:12,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 17:25:12,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-31 17:25:12,106 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 17:25:12,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-31 17:25:12,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 17:25:12,151 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-31 17:25:12,153 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 17:25:12,170 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-31 17:25:12,171 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 17:25:12,194 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-31 17:25:12,195 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 17:25:12,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [124102424] [2024-10-31 17:25:12,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [124102424] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 17:25:12,195 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 17:25:12,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2024-10-31 17:25:12,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219792152] [2024-10-31 17:25:12,195 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 17:25:12,196 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-31 17:25:12,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 17:25:12,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-31 17:25:12,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-31 17:25:12,196 INFO L87 Difference]: Start difference. First operand 242 states and 333 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-31 17:25:12,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 17:25:12,214 INFO L93 Difference]: Finished difference Result 255 states and 349 transitions. [2024-10-31 17:25:12,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 17:25:12,214 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2024-10-31 17:25:12,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 17:25:12,216 INFO L225 Difference]: With dead ends: 255 [2024-10-31 17:25:12,216 INFO L226 Difference]: Without dead ends: 248 [2024-10-31 17:25:12,216 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-31 17:25:12,217 INFO L432 NwaCegarLoop]: 99 mSDtfsCounter, 0 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 17:25:12,217 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 291 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 17:25:12,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2024-10-31 17:25:12,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 246. [2024-10-31 17:25:12,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 224 states have (on average 1.3169642857142858) internal successors, (295), 221 states have internal predecessors, (295), 18 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (24), 24 states have call predecessors, (24), 17 states have call successors, (24) [2024-10-31 17:25:12,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 337 transitions. [2024-10-31 17:25:12,236 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 337 transitions. Word has length 44 [2024-10-31 17:25:12,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 17:25:12,237 INFO L471 AbstractCegarLoop]: Abstraction has 246 states and 337 transitions. [2024-10-31 17:25:12,237 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-31 17:25:12,238 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 337 transitions. [2024-10-31 17:25:12,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-10-31 17:25:12,239 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 17:25:12,239 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 17:25:12,257 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-10-31 17:25:12,439 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 17:25:12,440 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 17:25:12,440 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 17:25:12,440 INFO L85 PathProgramCache]: Analyzing trace with hash -956562740, now seen corresponding path program 1 times [2024-10-31 17:25:12,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 17:25:12,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1773825196] [2024-10-31 17:25:12,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 17:25:12,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 17:25:12,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-31 17:25:12,443 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 17:25:12,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-31 17:25:12,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 17:25:12,490 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-31 17:25:12,491 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 17:25:12,511 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-31 17:25:12,512 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 17:25:12,539 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-31 17:25:12,540 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 17:25:12,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1773825196] [2024-10-31 17:25:12,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1773825196] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 17:25:12,540 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 17:25:12,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2024-10-31 17:25:12,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561417121] [2024-10-31 17:25:12,540 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 17:25:12,540 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-31 17:25:12,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 17:25:12,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-31 17:25:12,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-10-31 17:25:12,541 INFO L87 Difference]: Start difference. First operand 246 states and 337 transitions. Second operand has 8 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-31 17:25:12,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 17:25:12,570 INFO L93 Difference]: Finished difference Result 253 states and 343 transitions. [2024-10-31 17:25:12,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 17:25:12,571 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2024-10-31 17:25:12,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 17:25:12,572 INFO L225 Difference]: With dead ends: 253 [2024-10-31 17:25:12,572 INFO L226 Difference]: Without dead ends: 246 [2024-10-31 17:25:12,572 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-10-31 17:25:12,573 INFO L432 NwaCegarLoop]: 99 mSDtfsCounter, 6 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 17:25:12,573 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 485 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 17:25:12,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2024-10-31 17:25:12,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 242. [2024-10-31 17:25:12,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 220 states have (on average 1.309090909090909) internal successors, (288), 217 states have internal predecessors, (288), 18 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (24), 24 states have call predecessors, (24), 17 states have call successors, (24) [2024-10-31 17:25:12,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 330 transitions. [2024-10-31 17:25:12,583 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 330 transitions. Word has length 44 [2024-10-31 17:25:12,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 17:25:12,583 INFO L471 AbstractCegarLoop]: Abstraction has 242 states and 330 transitions. [2024-10-31 17:25:12,584 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-31 17:25:12,584 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 330 transitions. [2024-10-31 17:25:12,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-10-31 17:25:12,585 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 17:25:12,585 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 17:25:12,602 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-10-31 17:25:12,785 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 17:25:12,786 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 17:25:12,786 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 17:25:12,786 INFO L85 PathProgramCache]: Analyzing trace with hash -3100185, now seen corresponding path program 2 times [2024-10-31 17:25:12,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 17:25:12,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1913378508] [2024-10-31 17:25:12,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 17:25:12,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 17:25:12,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-31 17:25:12,788 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 17:25:12,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-31 17:25:12,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 17:25:12,832 INFO L255 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-31 17:25:12,834 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 17:25:12,901 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-10-31 17:25:12,901 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 17:25:12,946 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-10-31 17:25:12,946 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 17:25:12,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1913378508] [2024-10-31 17:25:12,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1913378508] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 17:25:12,947 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 17:25:12,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2024-10-31 17:25:12,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038816143] [2024-10-31 17:25:12,947 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 17:25:12,947 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-31 17:25:12,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 17:25:12,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-31 17:25:12,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-10-31 17:25:12,948 INFO L87 Difference]: Start difference. First operand 242 states and 330 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-31 17:25:13,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 17:25:13,066 INFO L93 Difference]: Finished difference Result 318 states and 425 transitions. [2024-10-31 17:25:13,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-31 17:25:13,067 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 44 [2024-10-31 17:25:13,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 17:25:13,068 INFO L225 Difference]: With dead ends: 318 [2024-10-31 17:25:13,068 INFO L226 Difference]: Without dead ends: 288 [2024-10-31 17:25:13,068 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 77 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-10-31 17:25:13,069 INFO L432 NwaCegarLoop]: 99 mSDtfsCounter, 18 mSDsluCounter, 650 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 749 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 17:25:13,069 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 749 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 17:25:13,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2024-10-31 17:25:13,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 238. [2024-10-31 17:25:13,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 216 states have (on average 1.3148148148148149) internal successors, (284), 213 states have internal predecessors, (284), 18 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (24), 24 states have call predecessors, (24), 17 states have call successors, (24) [2024-10-31 17:25:13,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 326 transitions. [2024-10-31 17:25:13,075 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 326 transitions. Word has length 44 [2024-10-31 17:25:13,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 17:25:13,075 INFO L471 AbstractCegarLoop]: Abstraction has 238 states and 326 transitions. [2024-10-31 17:25:13,076 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-31 17:25:13,076 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 326 transitions. [2024-10-31 17:25:13,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-10-31 17:25:13,076 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 17:25:13,076 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 17:25:13,093 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-10-31 17:25:13,280 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 17:25:13,281 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 17:25:13,281 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 17:25:13,281 INFO L85 PathProgramCache]: Analyzing trace with hash -261265623, now seen corresponding path program 1 times [2024-10-31 17:25:13,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 17:25:13,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1553426772] [2024-10-31 17:25:13,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 17:25:13,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 17:25:13,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-31 17:25:13,282 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 17:25:13,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-31 17:25:13,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 17:25:13,330 INFO L255 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-31 17:25:13,331 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 17:25:13,416 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-10-31 17:25:13,417 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 17:25:13,488 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-10-31 17:25:13,488 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 17:25:13,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1553426772] [2024-10-31 17:25:13,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1553426772] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 17:25:13,488 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 17:25:13,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2024-10-31 17:25:13,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577206438] [2024-10-31 17:25:13,489 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 17:25:13,489 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-31 17:25:13,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 17:25:13,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-31 17:25:13,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-10-31 17:25:13,490 INFO L87 Difference]: Start difference. First operand 238 states and 326 transitions. Second operand has 10 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-31 17:25:14,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 17:25:14,184 INFO L93 Difference]: Finished difference Result 249 states and 339 transitions. [2024-10-31 17:25:14,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-31 17:25:14,185 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2024-10-31 17:25:14,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 17:25:14,186 INFO L225 Difference]: With dead ends: 249 [2024-10-31 17:25:14,186 INFO L226 Difference]: Without dead ends: 247 [2024-10-31 17:25:14,186 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-10-31 17:25:14,187 INFO L432 NwaCegarLoop]: 96 mSDtfsCounter, 3 mSDsluCounter, 728 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 824 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-10-31 17:25:14,187 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 824 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-10-31 17:25:14,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2024-10-31 17:25:14,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 242. [2024-10-31 17:25:14,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 219 states have (on average 1.3105022831050228) internal successors, (287), 216 states have internal predecessors, (287), 18 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (24), 24 states have call predecessors, (24), 17 states have call successors, (24) [2024-10-31 17:25:14,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 329 transitions. [2024-10-31 17:25:14,195 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 329 transitions. Word has length 44 [2024-10-31 17:25:14,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 17:25:14,196 INFO L471 AbstractCegarLoop]: Abstraction has 242 states and 329 transitions. [2024-10-31 17:25:14,196 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-31 17:25:14,196 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 329 transitions. [2024-10-31 17:25:14,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-10-31 17:25:14,196 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 17:25:14,197 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 17:25:14,212 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-10-31 17:25:14,399 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 17:25:14,400 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 17:25:14,400 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 17:25:14,400 INFO L85 PathProgramCache]: Analyzing trace with hash 561980754, now seen corresponding path program 1 times [2024-10-31 17:25:14,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 17:25:14,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1843498873] [2024-10-31 17:25:14,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 17:25:14,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 17:25:14,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-31 17:25:14,401 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 17:25:14,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-31 17:25:14,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 17:25:14,465 INFO L255 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-31 17:25:14,466 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 17:25:14,482 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-31 17:25:14,482 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 17:25:14,509 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-31 17:25:14,509 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 17:25:14,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1843498873] [2024-10-31 17:25:14,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1843498873] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 17:25:14,509 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 17:25:14,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2024-10-31 17:25:14,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137731945] [2024-10-31 17:25:14,509 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 17:25:14,510 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-31 17:25:14,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 17:25:14,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-31 17:25:14,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-31 17:25:14,510 INFO L87 Difference]: Start difference. First operand 242 states and 329 transitions. Second operand has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-31 17:25:14,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 17:25:14,553 INFO L93 Difference]: Finished difference Result 476 states and 646 transitions. [2024-10-31 17:25:14,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 17:25:14,554 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2024-10-31 17:25:14,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 17:25:14,556 INFO L225 Difference]: With dead ends: 476 [2024-10-31 17:25:14,556 INFO L226 Difference]: Without dead ends: 436 [2024-10-31 17:25:14,556 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-31 17:25:14,556 INFO L432 NwaCegarLoop]: 134 mSDtfsCounter, 56 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 586 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 17:25:14,557 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 586 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 17:25:14,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2024-10-31 17:25:14,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 251. [2024-10-31 17:25:14,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 228 states have (on average 1.3070175438596492) internal successors, (298), 224 states have internal predecessors, (298), 18 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (24), 24 states have call predecessors, (24), 17 states have call successors, (24) [2024-10-31 17:25:14,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 340 transitions. [2024-10-31 17:25:14,570 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 340 transitions. Word has length 45 [2024-10-31 17:25:14,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 17:25:14,570 INFO L471 AbstractCegarLoop]: Abstraction has 251 states and 340 transitions. [2024-10-31 17:25:14,570 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-31 17:25:14,570 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 340 transitions. [2024-10-31 17:25:14,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-10-31 17:25:14,571 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 17:25:14,571 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 17:25:14,585 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-10-31 17:25:14,776 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 17:25:14,777 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 17:25:14,777 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 17:25:14,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1378514549, now seen corresponding path program 1 times [2024-10-31 17:25:14,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 17:25:14,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1341469511] [2024-10-31 17:25:14,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 17:25:14,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 17:25:14,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-31 17:25:14,785 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 17:25:14,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-31 17:25:14,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 17:25:14,832 INFO L255 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-31 17:25:14,833 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 17:25:14,937 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-31 17:25:14,937 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 17:25:15,002 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-31 17:25:15,002 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 17:25:15,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1341469511] [2024-10-31 17:25:15,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1341469511] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-31 17:25:15,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-31 17:25:15,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2024-10-31 17:25:15,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250119964] [2024-10-31 17:25:15,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 17:25:15,003 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-31 17:25:15,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 17:25:15,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-31 17:25:15,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2024-10-31 17:25:15,003 INFO L87 Difference]: Start difference. First operand 251 states and 340 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-31 17:25:15,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 17:25:15,146 INFO L93 Difference]: Finished difference Result 364 states and 498 transitions. [2024-10-31 17:25:15,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-31 17:25:15,147 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 48 [2024-10-31 17:25:15,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 17:25:15,149 INFO L225 Difference]: With dead ends: 364 [2024-10-31 17:25:15,149 INFO L226 Difference]: Without dead ends: 338 [2024-10-31 17:25:15,149 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2024-10-31 17:25:15,150 INFO L432 NwaCegarLoop]: 98 mSDtfsCounter, 23 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 17:25:15,150 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 408 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 17:25:15,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2024-10-31 17:25:15,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 314. [2024-10-31 17:25:15,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 285 states have (on average 1.3017543859649123) internal successors, (371), 282 states have internal predecessors, (371), 24 states have call successors, (24), 3 states have call predecessors, (24), 4 states have return successors, (30), 30 states have call predecessors, (30), 23 states have call successors, (30) [2024-10-31 17:25:15,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 425 transitions. [2024-10-31 17:25:15,161 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 425 transitions. Word has length 48 [2024-10-31 17:25:15,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 17:25:15,161 INFO L471 AbstractCegarLoop]: Abstraction has 314 states and 425 transitions. [2024-10-31 17:25:15,161 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-31 17:25:15,161 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 425 transitions. [2024-10-31 17:25:15,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-10-31 17:25:15,162 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 17:25:15,162 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 17:25:15,175 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-10-31 17:25:15,365 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 17:25:15,365 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 17:25:15,366 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 17:25:15,366 INFO L85 PathProgramCache]: Analyzing trace with hash 2079579127, now seen corresponding path program 1 times [2024-10-31 17:25:15,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 17:25:15,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1102145031] [2024-10-31 17:25:15,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 17:25:15,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 17:25:15,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-31 17:25:15,368 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 17:25:15,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-31 17:25:15,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 17:25:15,412 INFO L255 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-31 17:25:15,413 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 17:25:15,421 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-31 17:25:15,421 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 17:25:15,434 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-31 17:25:15,434 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 17:25:15,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1102145031] [2024-10-31 17:25:15,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1102145031] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 17:25:15,434 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 17:25:15,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2024-10-31 17:25:15,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948493321] [2024-10-31 17:25:15,434 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 17:25:15,435 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 17:25:15,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 17:25:15,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 17:25:15,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 17:25:15,435 INFO L87 Difference]: Start difference. First operand 314 states and 425 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-31 17:25:15,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 17:25:15,447 INFO L93 Difference]: Finished difference Result 329 states and 441 transitions. [2024-10-31 17:25:15,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 17:25:15,448 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 48 [2024-10-31 17:25:15,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 17:25:15,449 INFO L225 Difference]: With dead ends: 329 [2024-10-31 17:25:15,449 INFO L226 Difference]: Without dead ends: 268 [2024-10-31 17:25:15,449 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 17:25:15,449 INFO L432 NwaCegarLoop]: 98 mSDtfsCounter, 0 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 17:25:15,449 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 288 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 17:25:15,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2024-10-31 17:25:15,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 268. [2024-10-31 17:25:15,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 239 states have (on average 1.3138075313807531) internal successors, (314), 238 states have internal predecessors, (314), 24 states have call successors, (24), 3 states have call predecessors, (24), 4 states have return successors, (28), 28 states have call predecessors, (28), 23 states have call successors, (28) [2024-10-31 17:25:15,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 366 transitions. [2024-10-31 17:25:15,457 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 366 transitions. Word has length 48 [2024-10-31 17:25:15,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 17:25:15,457 INFO L471 AbstractCegarLoop]: Abstraction has 268 states and 366 transitions. [2024-10-31 17:25:15,457 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-31 17:25:15,458 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 366 transitions. [2024-10-31 17:25:15,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-10-31 17:25:15,458 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 17:25:15,458 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 17:25:15,472 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-10-31 17:25:15,658 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 17:25:15,659 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 17:25:15,659 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 17:25:15,659 INFO L85 PathProgramCache]: Analyzing trace with hash -1609971577, now seen corresponding path program 1 times [2024-10-31 17:25:15,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 17:25:15,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [802437345] [2024-10-31 17:25:15,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 17:25:15,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 17:25:15,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-31 17:25:15,661 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 17:25:15,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-10-31 17:25:15,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 17:25:15,722 INFO L255 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-31 17:25:15,723 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 17:25:15,741 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-10-31 17:25:15,741 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 17:25:15,756 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-10-31 17:25:15,756 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 17:25:15,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [802437345] [2024-10-31 17:25:15,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [802437345] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 17:25:15,756 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 17:25:15,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2024-10-31 17:25:15,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306588771] [2024-10-31 17:25:15,757 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 17:25:15,757 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 17:25:15,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 17:25:15,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 17:25:15,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-31 17:25:15,757 INFO L87 Difference]: Start difference. First operand 268 states and 366 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-31 17:25:15,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 17:25:15,829 INFO L93 Difference]: Finished difference Result 336 states and 461 transitions. [2024-10-31 17:25:15,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-31 17:25:15,829 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 49 [2024-10-31 17:25:15,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 17:25:15,830 INFO L225 Difference]: With dead ends: 336 [2024-10-31 17:25:15,830 INFO L226 Difference]: Without dead ends: 294 [2024-10-31 17:25:15,830 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-10-31 17:25:15,831 INFO L432 NwaCegarLoop]: 122 mSDtfsCounter, 50 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 17:25:15,831 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 413 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 17:25:15,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2024-10-31 17:25:15,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 268. [2024-10-31 17:25:15,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 239 states have (on average 1.3054393305439331) internal successors, (312), 238 states have internal predecessors, (312), 24 states have call successors, (24), 3 states have call predecessors, (24), 4 states have return successors, (28), 28 states have call predecessors, (28), 23 states have call successors, (28) [2024-10-31 17:25:15,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 364 transitions. [2024-10-31 17:25:15,839 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 364 transitions. Word has length 49 [2024-10-31 17:25:15,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 17:25:15,839 INFO L471 AbstractCegarLoop]: Abstraction has 268 states and 364 transitions. [2024-10-31 17:25:15,840 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-31 17:25:15,840 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 364 transitions. [2024-10-31 17:25:15,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-10-31 17:25:15,840 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 17:25:15,840 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 17:25:15,856 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-10-31 17:25:16,041 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 17:25:16,041 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 17:25:16,041 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 17:25:16,041 INFO L85 PathProgramCache]: Analyzing trace with hash -908906999, now seen corresponding path program 1 times [2024-10-31 17:25:16,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 17:25:16,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1909185617] [2024-10-31 17:25:16,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 17:25:16,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 17:25:16,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-31 17:25:16,043 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 17:25:16,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-10-31 17:25:16,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 17:25:16,086 INFO L255 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-31 17:25:16,087 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 17:25:16,098 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-10-31 17:25:16,099 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 17:25:16,111 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-10-31 17:25:16,111 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 17:25:16,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1909185617] [2024-10-31 17:25:16,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1909185617] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 17:25:16,111 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 17:25:16,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2024-10-31 17:25:16,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722424136] [2024-10-31 17:25:16,111 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 17:25:16,112 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 17:25:16,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 17:25:16,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 17:25:16,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 17:25:16,112 INFO L87 Difference]: Start difference. First operand 268 states and 364 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-31 17:25:16,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 17:25:16,167 INFO L93 Difference]: Finished difference Result 383 states and 514 transitions. [2024-10-31 17:25:16,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 17:25:16,168 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 49 [2024-10-31 17:25:16,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 17:25:16,169 INFO L225 Difference]: With dead ends: 383 [2024-10-31 17:25:16,169 INFO L226 Difference]: Without dead ends: 349 [2024-10-31 17:25:16,169 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-10-31 17:25:16,170 INFO L432 NwaCegarLoop]: 123 mSDtfsCounter, 40 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 17:25:16,170 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 313 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 17:25:16,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2024-10-31 17:25:16,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 276. [2024-10-31 17:25:16,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 247 states have (on average 1.2995951417004048) internal successors, (321), 246 states have internal predecessors, (321), 24 states have call successors, (24), 3 states have call predecessors, (24), 4 states have return successors, (28), 28 states have call predecessors, (28), 23 states have call successors, (28) [2024-10-31 17:25:16,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 373 transitions. [2024-10-31 17:25:16,179 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 373 transitions. Word has length 49 [2024-10-31 17:25:16,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 17:25:16,179 INFO L471 AbstractCegarLoop]: Abstraction has 276 states and 373 transitions. [2024-10-31 17:25:16,180 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-31 17:25:16,180 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 373 transitions. [2024-10-31 17:25:16,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-10-31 17:25:16,180 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 17:25:16,180 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 17:25:16,193 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-10-31 17:25:16,384 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 17:25:16,384 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 17:25:16,385 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 17:25:16,385 INFO L85 PathProgramCache]: Analyzing trace with hash 1552744902, now seen corresponding path program 1 times [2024-10-31 17:25:16,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 17:25:16,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [223110708] [2024-10-31 17:25:16,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 17:25:16,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 17:25:16,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-31 17:25:16,387 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 17:25:16,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-10-31 17:25:16,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 17:25:16,436 INFO L255 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-31 17:25:16,437 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 17:25:16,470 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-31 17:25:16,471 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 17:25:16,542 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-31 17:25:16,543 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 17:25:16,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [223110708] [2024-10-31 17:25:16,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [223110708] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 17:25:16,543 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 17:25:16,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2024-10-31 17:25:16,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886521862] [2024-10-31 17:25:16,543 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 17:25:16,543 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-31 17:25:16,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 17:25:16,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-31 17:25:16,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-10-31 17:25:16,544 INFO L87 Difference]: Start difference. First operand 276 states and 373 transitions. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-31 17:25:16,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 17:25:16,878 INFO L93 Difference]: Finished difference Result 413 states and 561 transitions. [2024-10-31 17:25:16,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-10-31 17:25:16,878 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 50 [2024-10-31 17:25:16,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 17:25:16,879 INFO L225 Difference]: With dead ends: 413 [2024-10-31 17:25:16,879 INFO L226 Difference]: Without dead ends: 389 [2024-10-31 17:25:16,880 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2024-10-31 17:25:16,880 INFO L432 NwaCegarLoop]: 93 mSDtfsCounter, 70 mSDsluCounter, 471 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 564 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-31 17:25:16,880 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 564 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-31 17:25:16,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2024-10-31 17:25:16,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 335. [2024-10-31 17:25:16,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 298 states have (on average 1.2953020134228188) internal successors, (386), 299 states have internal predecessors, (386), 32 states have call successors, (32), 3 states have call predecessors, (32), 4 states have return successors, (36), 36 states have call predecessors, (36), 31 states have call successors, (36) [2024-10-31 17:25:16,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 454 transitions. [2024-10-31 17:25:16,914 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 454 transitions. Word has length 50 [2024-10-31 17:25:16,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 17:25:16,914 INFO L471 AbstractCegarLoop]: Abstraction has 335 states and 454 transitions. [2024-10-31 17:25:16,914 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-31 17:25:16,914 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 454 transitions. [2024-10-31 17:25:16,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-10-31 17:25:16,915 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 17:25:16,915 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 17:25:16,927 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-10-31 17:25:17,118 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 17:25:17,118 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 17:25:17,119 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 17:25:17,119 INFO L85 PathProgramCache]: Analyzing trace with hash -1182826734, now seen corresponding path program 1 times [2024-10-31 17:25:17,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 17:25:17,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [864940531] [2024-10-31 17:25:17,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 17:25:17,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 17:25:17,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-31 17:25:17,121 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 17:25:17,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-10-31 17:25:17,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 17:25:17,167 INFO L255 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-31 17:25:17,168 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 17:25:17,190 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-31 17:25:17,190 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 17:25:17,214 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-31 17:25:17,215 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 17:25:17,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [864940531] [2024-10-31 17:25:17,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [864940531] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 17:25:17,215 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 17:25:17,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2024-10-31 17:25:17,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665809135] [2024-10-31 17:25:17,215 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 17:25:17,215 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-31 17:25:17,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 17:25:17,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-31 17:25:17,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-31 17:25:17,216 INFO L87 Difference]: Start difference. First operand 335 states and 454 transitions. Second operand has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-31 17:25:17,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 17:25:17,244 INFO L93 Difference]: Finished difference Result 377 states and 508 transitions. [2024-10-31 17:25:17,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 17:25:17,244 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 50 [2024-10-31 17:25:17,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 17:25:17,245 INFO L225 Difference]: With dead ends: 377 [2024-10-31 17:25:17,245 INFO L226 Difference]: Without dead ends: 339 [2024-10-31 17:25:17,245 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-31 17:25:17,246 INFO L432 NwaCegarLoop]: 121 mSDtfsCounter, 41 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 17:25:17,246 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 394 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 17:25:17,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2024-10-31 17:25:17,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 335. [2024-10-31 17:25:17,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 298 states have (on average 1.24496644295302) internal successors, (371), 299 states have internal predecessors, (371), 32 states have call successors, (32), 3 states have call predecessors, (32), 4 states have return successors, (36), 36 states have call predecessors, (36), 31 states have call successors, (36) [2024-10-31 17:25:17,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 439 transitions. [2024-10-31 17:25:17,255 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 439 transitions. Word has length 50 [2024-10-31 17:25:17,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 17:25:17,255 INFO L471 AbstractCegarLoop]: Abstraction has 335 states and 439 transitions. [2024-10-31 17:25:17,255 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-31 17:25:17,256 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 439 transitions. [2024-10-31 17:25:17,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-10-31 17:25:17,256 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 17:25:17,256 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 17:25:17,269 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-10-31 17:25:17,456 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 17:25:17,457 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 17:25:17,457 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 17:25:17,457 INFO L85 PathProgramCache]: Analyzing trace with hash -453176863, now seen corresponding path program 1 times [2024-10-31 17:25:17,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 17:25:17,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [907674926] [2024-10-31 17:25:17,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 17:25:17,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 17:25:17,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-31 17:25:17,459 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 17:25:17,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-10-31 17:25:17,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 17:25:17,500 INFO L255 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-31 17:25:17,501 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 17:25:17,519 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-31 17:25:17,519 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 17:25:17,548 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-31 17:25:17,548 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 17:25:17,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [907674926] [2024-10-31 17:25:17,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [907674926] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-31 17:25:17,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-31 17:25:17,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2024-10-31 17:25:17,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636735497] [2024-10-31 17:25:17,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 17:25:17,549 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 17:25:17,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 17:25:17,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 17:25:17,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-10-31 17:25:17,549 INFO L87 Difference]: Start difference. First operand 335 states and 439 transitions. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-31 17:25:17,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 17:25:17,589 INFO L93 Difference]: Finished difference Result 558 states and 731 transitions. [2024-10-31 17:25:17,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 17:25:17,589 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 51 [2024-10-31 17:25:17,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 17:25:17,590 INFO L225 Difference]: With dead ends: 558 [2024-10-31 17:25:17,590 INFO L226 Difference]: Without dead ends: 226 [2024-10-31 17:25:17,591 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2024-10-31 17:25:17,591 INFO L432 NwaCegarLoop]: 88 mSDtfsCounter, 26 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 17:25:17,591 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 246 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 17:25:17,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2024-10-31 17:25:17,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 214. [2024-10-31 17:25:17,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 185 states have (on average 1.2216216216216216) internal successors, (226), 190 states have internal predecessors, (226), 23 states have call successors, (23), 3 states have call predecessors, (23), 5 states have return successors, (26), 24 states have call predecessors, (26), 22 states have call successors, (26) [2024-10-31 17:25:17,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 275 transitions. [2024-10-31 17:25:17,600 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 275 transitions. Word has length 51 [2024-10-31 17:25:17,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 17:25:17,600 INFO L471 AbstractCegarLoop]: Abstraction has 214 states and 275 transitions. [2024-10-31 17:25:17,600 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-31 17:25:17,600 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 275 transitions. [2024-10-31 17:25:17,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-10-31 17:25:17,601 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 17:25:17,601 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 17:25:17,616 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-10-31 17:25:17,801 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 17:25:17,802 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 17:25:17,802 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 17:25:17,802 INFO L85 PathProgramCache]: Analyzing trace with hash 1332385442, now seen corresponding path program 1 times [2024-10-31 17:25:17,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 17:25:17,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1453852973] [2024-10-31 17:25:17,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 17:25:17,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 17:25:17,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-31 17:25:17,806 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 17:25:17,807 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-10-31 17:25:17,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 17:25:17,851 INFO L255 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-31 17:25:17,851 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 17:25:17,863 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-31 17:25:17,863 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 17:25:17,877 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-31 17:25:17,878 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 17:25:17,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1453852973] [2024-10-31 17:25:17,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1453852973] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 17:25:17,878 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 17:25:17,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2024-10-31 17:25:17,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644499201] [2024-10-31 17:25:17,878 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 17:25:17,878 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 17:25:17,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 17:25:17,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 17:25:17,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 17:25:17,879 INFO L87 Difference]: Start difference. First operand 214 states and 275 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-31 17:25:17,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 17:25:17,892 INFO L93 Difference]: Finished difference Result 223 states and 283 transitions. [2024-10-31 17:25:17,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 17:25:17,893 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 52 [2024-10-31 17:25:17,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 17:25:17,894 INFO L225 Difference]: With dead ends: 223 [2024-10-31 17:25:17,894 INFO L226 Difference]: Without dead ends: 182 [2024-10-31 17:25:17,894 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 17:25:17,894 INFO L432 NwaCegarLoop]: 95 mSDtfsCounter, 0 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 17:25:17,894 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 279 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 17:25:17,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2024-10-31 17:25:17,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 176. [2024-10-31 17:25:17,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 150 states have (on average 1.2333333333333334) internal successors, (185), 156 states have internal predecessors, (185), 20 states have call successors, (20), 3 states have call predecessors, (20), 5 states have return successors, (20), 19 states have call predecessors, (20), 18 states have call successors, (20) [2024-10-31 17:25:17,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 225 transitions. [2024-10-31 17:25:17,901 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 225 transitions. Word has length 52 [2024-10-31 17:25:17,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 17:25:17,901 INFO L471 AbstractCegarLoop]: Abstraction has 176 states and 225 transitions. [2024-10-31 17:25:17,901 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-31 17:25:17,901 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 225 transitions. [2024-10-31 17:25:17,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-10-31 17:25:17,901 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 17:25:17,902 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 17:25:17,914 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-10-31 17:25:18,102 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 17:25:18,102 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 17:25:18,103 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 17:25:18,103 INFO L85 PathProgramCache]: Analyzing trace with hash -444512686, now seen corresponding path program 1 times [2024-10-31 17:25:18,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 17:25:18,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1440080181] [2024-10-31 17:25:18,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 17:25:18,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 17:25:18,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-31 17:25:18,104 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 17:25:18,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-10-31 17:25:18,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 17:25:18,159 INFO L255 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-31 17:25:18,160 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 17:25:18,185 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-31 17:25:18,186 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 17:25:18,249 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-31 17:25:18,250 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 17:25:18,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1440080181] [2024-10-31 17:25:18,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1440080181] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 17:25:18,250 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 17:25:18,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2024-10-31 17:25:18,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875670193] [2024-10-31 17:25:18,250 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 17:25:18,250 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-31 17:25:18,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 17:25:18,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-31 17:25:18,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-10-31 17:25:18,251 INFO L87 Difference]: Start difference. First operand 176 states and 225 transitions. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-31 17:25:18,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 17:25:18,467 INFO L93 Difference]: Finished difference Result 242 states and 308 transitions. [2024-10-31 17:25:18,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-31 17:25:18,467 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 52 [2024-10-31 17:25:18,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 17:25:18,468 INFO L225 Difference]: With dead ends: 242 [2024-10-31 17:25:18,468 INFO L226 Difference]: Without dead ends: 192 [2024-10-31 17:25:18,468 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2024-10-31 17:25:18,469 INFO L432 NwaCegarLoop]: 77 mSDtfsCounter, 64 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-31 17:25:18,469 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 408 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-31 17:25:18,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2024-10-31 17:25:18,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 159. [2024-10-31 17:25:18,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 134 states have (on average 1.2164179104477613) internal successors, (163), 138 states have internal predecessors, (163), 20 states have call successors, (20), 3 states have call predecessors, (20), 4 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2024-10-31 17:25:18,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 201 transitions. [2024-10-31 17:25:18,475 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 201 transitions. Word has length 52 [2024-10-31 17:25:18,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 17:25:18,475 INFO L471 AbstractCegarLoop]: Abstraction has 159 states and 201 transitions. [2024-10-31 17:25:18,475 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-31 17:25:18,475 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 201 transitions. [2024-10-31 17:25:18,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-10-31 17:25:18,475 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 17:25:18,475 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 17:25:18,487 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-10-31 17:25:18,679 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 17:25:18,680 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 17:25:18,680 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 17:25:18,680 INFO L85 PathProgramCache]: Analyzing trace with hash -71376074, now seen corresponding path program 1 times [2024-10-31 17:25:18,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 17:25:18,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [122403817] [2024-10-31 17:25:18,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 17:25:18,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 17:25:18,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-31 17:25:18,682 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 17:25:18,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-10-31 17:25:18,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 17:25:18,727 INFO L255 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-31 17:25:18,728 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 17:25:18,876 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-10-31 17:25:18,877 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 17:25:19,106 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-10-31 17:25:19,107 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 17:25:19,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [122403817] [2024-10-31 17:25:19,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [122403817] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-31 17:25:19,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-31 17:25:19,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 15 [2024-10-31 17:25:19,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628079628] [2024-10-31 17:25:19,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 17:25:19,107 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-31 17:25:19,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 17:25:19,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-31 17:25:19,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2024-10-31 17:25:19,108 INFO L87 Difference]: Start difference. First operand 159 states and 201 transitions. Second operand has 8 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-31 17:25:19,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 17:25:19,560 INFO L93 Difference]: Finished difference Result 169 states and 212 transitions. [2024-10-31 17:25:19,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-31 17:25:19,560 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 54 [2024-10-31 17:25:19,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 17:25:19,561 INFO L225 Difference]: With dead ends: 169 [2024-10-31 17:25:19,561 INFO L226 Difference]: Without dead ends: 167 [2024-10-31 17:25:19,561 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2024-10-31 17:25:19,562 INFO L432 NwaCegarLoop]: 83 mSDtfsCounter, 14 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-31 17:25:19,562 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 395 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-31 17:25:19,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2024-10-31 17:25:19,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 165. [2024-10-31 17:25:19,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 137 states have (on average 1.2116788321167884) internal successors, (166), 143 states have internal predecessors, (166), 22 states have call successors, (22), 4 states have call predecessors, (22), 5 states have return successors, (20), 18 states have call predecessors, (20), 20 states have call successors, (20) [2024-10-31 17:25:19,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 208 transitions. [2024-10-31 17:25:19,569 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 208 transitions. Word has length 54 [2024-10-31 17:25:19,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 17:25:19,569 INFO L471 AbstractCegarLoop]: Abstraction has 165 states and 208 transitions. [2024-10-31 17:25:19,569 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-31 17:25:19,569 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 208 transitions. [2024-10-31 17:25:19,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-10-31 17:25:19,569 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 17:25:19,569 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 17:25:19,584 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-10-31 17:25:19,773 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 17:25:19,773 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 17:25:19,774 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 17:25:19,774 INFO L85 PathProgramCache]: Analyzing trace with hash 1768875186, now seen corresponding path program 1 times [2024-10-31 17:25:19,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 17:25:19,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1078838382] [2024-10-31 17:25:19,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 17:25:19,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 17:25:19,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-31 17:25:19,782 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 17:25:19,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-10-31 17:25:19,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 17:25:19,830 INFO L255 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-31 17:25:19,831 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 17:25:26,261 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-10-31 17:25:26,261 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 17:25:28,958 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-10-31 17:25:28,958 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 17:25:28,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1078838382] [2024-10-31 17:25:28,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1078838382] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-31 17:25:28,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-31 17:25:28,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11] total 17 [2024-10-31 17:25:28,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74092402] [2024-10-31 17:25:28,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 17:25:28,959 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-31 17:25:28,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 17:25:28,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-31 17:25:28,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=210, Unknown=2, NotChecked=0, Total=272 [2024-10-31 17:25:28,959 INFO L87 Difference]: Start difference. First operand 165 states and 208 transitions. Second operand has 9 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-31 17:25:29,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 17:25:29,173 INFO L93 Difference]: Finished difference Result 173 states and 215 transitions. [2024-10-31 17:25:29,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-31 17:25:29,174 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 55 [2024-10-31 17:25:29,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 17:25:29,174 INFO L225 Difference]: With dead ends: 173 [2024-10-31 17:25:29,174 INFO L226 Difference]: Without dead ends: 171 [2024-10-31 17:25:29,175 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=73, Invalid=267, Unknown=2, NotChecked=0, Total=342 [2024-10-31 17:25:29,175 INFO L432 NwaCegarLoop]: 85 mSDtfsCounter, 15 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 479 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-31 17:25:29,175 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 479 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-31 17:25:29,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2024-10-31 17:25:29,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 163. [2024-10-31 17:25:29,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 137 states have (on average 1.2116788321167884) internal successors, (166), 141 states have internal predecessors, (166), 20 states have call successors, (20), 4 states have call predecessors, (20), 5 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2024-10-31 17:25:29,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 204 transitions. [2024-10-31 17:25:29,181 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 204 transitions. Word has length 55 [2024-10-31 17:25:29,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 17:25:29,182 INFO L471 AbstractCegarLoop]: Abstraction has 163 states and 204 transitions. [2024-10-31 17:25:29,182 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-31 17:25:29,182 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 204 transitions. [2024-10-31 17:25:29,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-10-31 17:25:29,182 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 17:25:29,182 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 17:25:29,198 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-10-31 17:25:29,383 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 17:25:29,383 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 17:25:29,383 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 17:25:29,383 INFO L85 PathProgramCache]: Analyzing trace with hash 589240327, now seen corresponding path program 1 times [2024-10-31 17:25:29,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 17:25:29,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1218030514] [2024-10-31 17:25:29,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 17:25:29,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 17:25:29,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-31 17:25:29,385 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 17:25:29,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-10-31 17:25:29,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 17:25:29,433 INFO L255 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-31 17:25:29,434 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 17:25:29,471 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-10-31 17:25:29,472 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 17:25:29,536 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-10-31 17:25:29,536 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 17:25:29,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1218030514] [2024-10-31 17:25:29,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1218030514] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 17:25:29,536 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 17:25:29,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2024-10-31 17:25:29,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570418899] [2024-10-31 17:25:29,536 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 17:25:29,537 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-31 17:25:29,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 17:25:29,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-31 17:25:29,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-10-31 17:25:29,537 INFO L87 Difference]: Start difference. First operand 163 states and 204 transitions. Second operand has 10 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-31 17:25:29,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 17:25:29,585 INFO L93 Difference]: Finished difference Result 192 states and 234 transitions. [2024-10-31 17:25:29,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-31 17:25:29,586 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 60 [2024-10-31 17:25:29,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 17:25:29,587 INFO L225 Difference]: With dead ends: 192 [2024-10-31 17:25:29,587 INFO L226 Difference]: Without dead ends: 190 [2024-10-31 17:25:29,587 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-10-31 17:25:29,588 INFO L432 NwaCegarLoop]: 108 mSDtfsCounter, 36 mSDsluCounter, 503 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 611 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 17:25:29,588 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 611 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 17:25:29,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2024-10-31 17:25:29,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 167. [2024-10-31 17:25:29,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 140 states have (on average 1.207142857142857) internal successors, (169), 144 states have internal predecessors, (169), 20 states have call successors, (20), 5 states have call predecessors, (20), 6 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2024-10-31 17:25:29,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 207 transitions. [2024-10-31 17:25:29,598 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 207 transitions. Word has length 60 [2024-10-31 17:25:29,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 17:25:29,598 INFO L471 AbstractCegarLoop]: Abstraction has 167 states and 207 transitions. [2024-10-31 17:25:29,598 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-31 17:25:29,598 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 207 transitions. [2024-10-31 17:25:29,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-10-31 17:25:29,599 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 17:25:29,599 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 17:25:29,616 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-10-31 17:25:29,799 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 17:25:29,800 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 17:25:29,800 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 17:25:29,800 INFO L85 PathProgramCache]: Analyzing trace with hash 921322142, now seen corresponding path program 1 times [2024-10-31 17:25:29,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 17:25:29,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1811496341] [2024-10-31 17:25:29,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 17:25:29,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 17:25:29,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-31 17:25:29,801 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 17:25:29,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-10-31 17:25:29,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 17:25:29,854 INFO L255 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-10-31 17:25:29,857 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 17:25:30,764 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-10-31 17:25:30,764 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 17:25:32,048 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-10-31 17:25:32,049 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 17:25:32,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1811496341] [2024-10-31 17:25:32,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1811496341] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 17:25:32,049 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 17:25:32,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13, 13] imperfect sequences [] total 24 [2024-10-31 17:25:32,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658100528] [2024-10-31 17:25:32,050 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 17:25:32,050 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-10-31 17:25:32,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 17:25:32,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-10-31 17:25:32,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2024-10-31 17:25:32,051 INFO L87 Difference]: Start difference. First operand 167 states and 207 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 6 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2024-10-31 17:25:57,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 17:25:57,971 INFO L93 Difference]: Finished difference Result 277 states and 347 transitions. [2024-10-31 17:25:57,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-10-31 17:25:57,975 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 6 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 65 [2024-10-31 17:25:57,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 17:25:57,976 INFO L225 Difference]: With dead ends: 277 [2024-10-31 17:25:57,976 INFO L226 Difference]: Without dead ends: 241 [2024-10-31 17:25:57,977 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 16.6s TimeCoverageRelationStatistics Valid=268, Invalid=1624, Unknown=0, NotChecked=0, Total=1892 [2024-10-31 17:25:57,977 INFO L432 NwaCegarLoop]: 86 mSDtfsCounter, 98 mSDsluCounter, 802 mSDsCounter, 0 mSdLazyCounter, 767 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 888 SdHoareTripleChecker+Invalid, 809 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 767 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.9s IncrementalHoareTripleChecker+Time [2024-10-31 17:25:57,977 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 888 Invalid, 809 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 767 Invalid, 0 Unknown, 0 Unchecked, 10.9s Time] [2024-10-31 17:25:57,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2024-10-31 17:25:58,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 198. [2024-10-31 17:25:58,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 167 states have (on average 1.2095808383233533) internal successors, (202), 172 states have internal predecessors, (202), 24 states have call successors, (24), 5 states have call predecessors, (24), 6 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2024-10-31 17:25:58,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 248 transitions. [2024-10-31 17:25:58,002 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 248 transitions. Word has length 65 [2024-10-31 17:25:58,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 17:25:58,002 INFO L471 AbstractCegarLoop]: Abstraction has 198 states and 248 transitions. [2024-10-31 17:25:58,003 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 6 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2024-10-31 17:25:58,003 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 248 transitions. [2024-10-31 17:25:58,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-10-31 17:25:58,007 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 17:25:58,008 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 17:25:58,030 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-10-31 17:25:58,208 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 17:25:58,208 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 17:25:58,209 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 17:25:58,209 INFO L85 PathProgramCache]: Analyzing trace with hash -1467102624, now seen corresponding path program 1 times [2024-10-31 17:25:58,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 17:25:58,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [18386981] [2024-10-31 17:25:58,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 17:25:58,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 17:25:58,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-31 17:25:58,213 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 17:25:58,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-10-31 17:25:58,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 17:25:58,265 INFO L255 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-31 17:25:58,267 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 17:25:59,095 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-10-31 17:25:59,095 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 17:26:00,524 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-10-31 17:26:00,524 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 17:26:00,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [18386981] [2024-10-31 17:26:00,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [18386981] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 17:26:00,524 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 17:26:00,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 14 [2024-10-31 17:26:00,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487035532] [2024-10-31 17:26:00,525 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 17:26:00,525 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-31 17:26:00,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 17:26:00,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-31 17:26:00,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2024-10-31 17:26:00,526 INFO L87 Difference]: Start difference. First operand 198 states and 248 transitions. Second operand has 14 states, 14 states have (on average 4.0) internal successors, (56), 14 states have internal predecessors, (56), 6 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2024-10-31 17:26:05,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 17:26:05,484 INFO L93 Difference]: Finished difference Result 264 states and 326 transitions. [2024-10-31 17:26:05,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-10-31 17:26:05,484 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.0) internal successors, (56), 14 states have internal predecessors, (56), 6 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 66 [2024-10-31 17:26:05,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 17:26:05,486 INFO L225 Difference]: With dead ends: 264 [2024-10-31 17:26:05,486 INFO L226 Difference]: Without dead ends: 228 [2024-10-31 17:26:05,486 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2024-10-31 17:26:05,487 INFO L432 NwaCegarLoop]: 84 mSDtfsCounter, 71 mSDsluCounter, 569 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 653 SdHoareTripleChecker+Invalid, 415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2024-10-31 17:26:05,487 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 653 Invalid, 415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2024-10-31 17:26:05,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2024-10-31 17:26:05,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 162. [2024-10-31 17:26:05,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 137 states have (on average 1.2043795620437956) internal successors, (165), 142 states have internal predecessors, (165), 18 states have call successors, (18), 5 states have call predecessors, (18), 6 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-10-31 17:26:05,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 199 transitions. [2024-10-31 17:26:05,497 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 199 transitions. Word has length 66 [2024-10-31 17:26:05,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 17:26:05,497 INFO L471 AbstractCegarLoop]: Abstraction has 162 states and 199 transitions. [2024-10-31 17:26:05,498 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.0) internal successors, (56), 14 states have internal predecessors, (56), 6 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2024-10-31 17:26:05,498 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 199 transitions. [2024-10-31 17:26:05,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-10-31 17:26:05,501 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 17:26:05,501 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 17:26:05,515 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-10-31 17:26:05,705 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 17:26:05,705 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 17:26:05,706 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 17:26:05,706 INFO L85 PathProgramCache]: Analyzing trace with hash 1151744600, now seen corresponding path program 1 times [2024-10-31 17:26:05,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 17:26:05,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1848551610] [2024-10-31 17:26:05,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 17:26:05,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 17:26:05,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-31 17:26:05,708 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 17:26:05,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-10-31 17:26:05,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 17:26:05,758 INFO L255 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-31 17:26:05,759 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 17:26:06,002 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-10-31 17:26:06,002 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 17:26:06,546 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-10-31 17:26:06,546 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 17:26:06,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1848551610] [2024-10-31 17:26:06,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1848551610] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 17:26:06,546 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 17:26:06,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2024-10-31 17:26:06,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630793625] [2024-10-31 17:26:06,546 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 17:26:06,547 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-31 17:26:06,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 17:26:06,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-31 17:26:06,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-10-31 17:26:06,547 INFO L87 Difference]: Start difference. First operand 162 states and 199 transitions. Second operand has 10 states, 8 states have (on average 5.875) internal successors, (47), 8 states have internal predecessors, (47), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2024-10-31 17:26:07,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 17:26:07,027 INFO L93 Difference]: Finished difference Result 182 states and 218 transitions. [2024-10-31 17:26:07,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-31 17:26:07,032 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 5.875) internal successors, (47), 8 states have internal predecessors, (47), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 68 [2024-10-31 17:26:07,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 17:26:07,032 INFO L225 Difference]: With dead ends: 182 [2024-10-31 17:26:07,033 INFO L226 Difference]: Without dead ends: 156 [2024-10-31 17:26:07,033 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-10-31 17:26:07,033 INFO L432 NwaCegarLoop]: 100 mSDtfsCounter, 13 mSDsluCounter, 659 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 759 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-31 17:26:07,033 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 759 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-31 17:26:07,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2024-10-31 17:26:07,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 145. [2024-10-31 17:26:07,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 121 states have (on average 1.1735537190082646) internal successors, (142), 126 states have internal predecessors, (142), 16 states have call successors, (16), 6 states have call predecessors, (16), 7 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2024-10-31 17:26:07,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 172 transitions. [2024-10-31 17:26:07,054 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 172 transitions. Word has length 68 [2024-10-31 17:26:07,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 17:26:07,054 INFO L471 AbstractCegarLoop]: Abstraction has 145 states and 172 transitions. [2024-10-31 17:26:07,054 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 5.875) internal successors, (47), 8 states have internal predecessors, (47), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2024-10-31 17:26:07,055 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 172 transitions. [2024-10-31 17:26:07,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2024-10-31 17:26:07,055 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 17:26:07,055 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 17:26:07,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-10-31 17:26:07,255 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 17:26:07,256 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 17:26:07,256 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 17:26:07,256 INFO L85 PathProgramCache]: Analyzing trace with hash -550644062, now seen corresponding path program 1 times [2024-10-31 17:26:07,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 17:26:07,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [546686478] [2024-10-31 17:26:07,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 17:26:07,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 17:26:07,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-31 17:26:07,258 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 17:26:07,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-10-31 17:26:07,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 17:26:07,331 INFO L255 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-31 17:26:07,332 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 17:26:07,660 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-10-31 17:26:07,660 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 17:26:08,146 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-10-31 17:26:08,147 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 17:26:08,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [546686478] [2024-10-31 17:26:08,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [546686478] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 17:26:08,147 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 17:26:08,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2024-10-31 17:26:08,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124517669] [2024-10-31 17:26:08,147 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 17:26:08,147 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-31 17:26:08,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 17:26:08,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-31 17:26:08,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-31 17:26:08,148 INFO L87 Difference]: Start difference. First operand 145 states and 172 transitions. Second operand has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-10-31 17:26:08,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 17:26:08,260 INFO L93 Difference]: Finished difference Result 173 states and 200 transitions. [2024-10-31 17:26:08,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 17:26:08,261 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 69 [2024-10-31 17:26:08,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 17:26:08,262 INFO L225 Difference]: With dead ends: 173 [2024-10-31 17:26:08,262 INFO L226 Difference]: Without dead ends: 127 [2024-10-31 17:26:08,262 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-31 17:26:08,262 INFO L432 NwaCegarLoop]: 85 mSDtfsCounter, 13 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 17:26:08,262 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 309 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 17:26:08,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2024-10-31 17:26:08,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 123. [2024-10-31 17:26:08,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 105 states have (on average 1.1333333333333333) internal successors, (119), 107 states have internal predecessors, (119), 12 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-10-31 17:26:08,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 141 transitions. [2024-10-31 17:26:08,270 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 141 transitions. Word has length 69 [2024-10-31 17:26:08,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 17:26:08,271 INFO L471 AbstractCegarLoop]: Abstraction has 123 states and 141 transitions. [2024-10-31 17:26:08,271 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-10-31 17:26:08,271 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 141 transitions. [2024-10-31 17:26:08,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2024-10-31 17:26:08,271 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 17:26:08,271 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 17:26:08,285 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2024-10-31 17:26:08,475 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 17:26:08,476 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 17:26:08,476 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 17:26:08,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1500339936, now seen corresponding path program 1 times [2024-10-31 17:26:08,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 17:26:08,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1190854540] [2024-10-31 17:26:08,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 17:26:08,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 17:26:08,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-31 17:26:08,477 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 17:26:08,482 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-10-31 17:26:08,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 17:26:08,536 INFO L255 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-31 17:26:08,538 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 17:26:09,650 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-10-31 17:26:09,650 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 17:26:11,848 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-10-31 17:26:11,848 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 17:26:11,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1190854540] [2024-10-31 17:26:11,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1190854540] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 17:26:11,848 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 17:26:11,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2024-10-31 17:26:11,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445470132] [2024-10-31 17:26:11,849 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 17:26:11,849 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-31 17:26:11,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 17:26:11,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-31 17:26:11,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2024-10-31 17:26:11,850 INFO L87 Difference]: Start difference. First operand 123 states and 141 transitions. Second operand has 18 states, 18 states have (on average 4.0) internal successors, (72), 16 states have internal predecessors, (72), 6 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2024-10-31 17:26:12,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 17:26:12,930 INFO L93 Difference]: Finished difference Result 136 states and 151 transitions. [2024-10-31 17:26:12,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-31 17:26:12,931 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.0) internal successors, (72), 16 states have internal predecessors, (72), 6 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) Word has length 69 [2024-10-31 17:26:12,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 17:26:12,931 INFO L225 Difference]: With dead ends: 136 [2024-10-31 17:26:12,931 INFO L226 Difference]: Without dead ends: 84 [2024-10-31 17:26:12,932 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2024-10-31 17:26:12,932 INFO L432 NwaCegarLoop]: 62 mSDtfsCounter, 5 mSDsluCounter, 638 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 700 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-10-31 17:26:12,932 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 700 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-10-31 17:26:12,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2024-10-31 17:26:12,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2024-10-31 17:26:12,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 69 states have (on average 1.1304347826086956) internal successors, (78), 70 states have internal predecessors, (78), 9 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-10-31 17:26:12,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 95 transitions. [2024-10-31 17:26:12,946 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 95 transitions. Word has length 69 [2024-10-31 17:26:12,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 17:26:12,946 INFO L471 AbstractCegarLoop]: Abstraction has 84 states and 95 transitions. [2024-10-31 17:26:12,946 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.0) internal successors, (72), 16 states have internal predecessors, (72), 6 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2024-10-31 17:26:12,946 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 95 transitions. [2024-10-31 17:26:12,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-10-31 17:26:12,946 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 17:26:12,946 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 17:26:12,967 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2024-10-31 17:26:13,147 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 17:26:13,147 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 17:26:13,147 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 17:26:13,147 INFO L85 PathProgramCache]: Analyzing trace with hash 438339121, now seen corresponding path program 1 times [2024-10-31 17:26:13,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 17:26:13,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1897394584] [2024-10-31 17:26:13,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 17:26:13,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 17:26:13,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-31 17:26:13,149 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 17:26:13,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-10-31 17:26:13,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 17:26:13,223 INFO L255 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-31 17:26:13,225 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 17:26:15,612 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-10-31 17:26:15,612 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 17:26:19,138 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-10-31 17:26:19,138 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 17:26:19,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1897394584] [2024-10-31 17:26:19,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1897394584] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 17:26:19,138 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 17:26:19,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12, 12] imperfect sequences [] total 22 [2024-10-31 17:26:19,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019217417] [2024-10-31 17:26:19,139 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 17:26:19,139 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-10-31 17:26:19,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 17:26:19,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-10-31 17:26:19,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2024-10-31 17:26:19,140 INFO L87 Difference]: Start difference. First operand 84 states and 95 transitions. Second operand has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 states have internal predecessors, (60), 8 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2024-10-31 17:26:25,440 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2024-10-31 17:26:29,447 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2024-10-31 17:26:36,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 17:26:36,346 INFO L93 Difference]: Finished difference Result 107 states and 121 transitions. [2024-10-31 17:26:36,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-10-31 17:26:36,347 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 states have internal predecessors, (60), 8 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 73 [2024-10-31 17:26:36,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 17:26:36,347 INFO L225 Difference]: With dead ends: 107 [2024-10-31 17:26:36,347 INFO L226 Difference]: Without dead ends: 68 [2024-10-31 17:26:36,348 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=215, Invalid=1267, Unknown=0, NotChecked=0, Total=1482 [2024-10-31 17:26:36,348 INFO L432 NwaCegarLoop]: 59 mSDtfsCounter, 38 mSDsluCounter, 481 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 13 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 540 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.7s IncrementalHoareTripleChecker+Time [2024-10-31 17:26:36,348 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 540 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 349 Invalid, 2 Unknown, 0 Unchecked, 11.7s Time] [2024-10-31 17:26:36,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2024-10-31 17:26:36,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2024-10-31 17:26:36,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 55 states have (on average 1.0909090909090908) internal successors, (60), 56 states have internal predecessors, (60), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-10-31 17:26:36,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 73 transitions. [2024-10-31 17:26:36,353 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 73 transitions. Word has length 73 [2024-10-31 17:26:36,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 17:26:36,353 INFO L471 AbstractCegarLoop]: Abstraction has 68 states and 73 transitions. [2024-10-31 17:26:36,353 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 states have internal predecessors, (60), 8 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2024-10-31 17:26:36,353 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 73 transitions. [2024-10-31 17:26:36,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-10-31 17:26:36,353 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 17:26:36,353 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 17:26:36,366 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-10-31 17:26:36,554 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 17:26:36,554 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 17:26:36,554 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 17:26:36,554 INFO L85 PathProgramCache]: Analyzing trace with hash -1423365133, now seen corresponding path program 1 times [2024-10-31 17:26:36,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 17:26:36,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1744055461] [2024-10-31 17:26:36,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 17:26:36,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 17:26:36,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-31 17:26:36,556 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 17:26:36,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-10-31 17:26:36,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 17:26:36,629 INFO L255 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-10-31 17:26:36,631 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 17:26:39,211 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-10-31 17:26:39,211 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 17:26:43,635 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-10-31 17:26:43,635 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 17:26:43,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1744055461] [2024-10-31 17:26:43,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1744055461] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 17:26:43,636 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 17:26:43,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2024-10-31 17:26:43,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987969637] [2024-10-31 17:26:43,636 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 17:26:43,636 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-10-31 17:26:43,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 17:26:43,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-10-31 17:26:43,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=394, Unknown=0, NotChecked=0, Total=506 [2024-10-31 17:26:43,637 INFO L87 Difference]: Start difference. First operand 68 states and 73 transitions. Second operand has 23 states, 21 states have (on average 3.1904761904761907) internal successors, (67), 23 states have internal predecessors, (67), 8 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2024-10-31 17:26:45,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 17:26:45,923 INFO L93 Difference]: Finished difference Result 68 states and 73 transitions. [2024-10-31 17:26:45,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-31 17:26:45,924 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 3.1904761904761907) internal successors, (67), 23 states have internal predecessors, (67), 8 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 74 [2024-10-31 17:26:45,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 17:26:45,924 INFO L225 Difference]: With dead ends: 68 [2024-10-31 17:26:45,924 INFO L226 Difference]: Without dead ends: 0 [2024-10-31 17:26:45,925 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 124 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=117, Invalid=435, Unknown=0, NotChecked=0, Total=552 [2024-10-31 17:26:45,925 INFO L432 NwaCegarLoop]: 46 mSDtfsCounter, 7 mSDsluCounter, 435 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2024-10-31 17:26:45,925 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 481 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2024-10-31 17:26:45,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-10-31 17:26:45,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-10-31 17:26:45,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 17:26:45,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-10-31 17:26:45,926 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 74 [2024-10-31 17:26:45,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 17:26:45,926 INFO L471 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-10-31 17:26:45,926 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 3.1904761904761907) internal successors, (67), 23 states have internal predecessors, (67), 8 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2024-10-31 17:26:45,926 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-10-31 17:26:45,926 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-10-31 17:26:45,934 INFO L782 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-10-31 17:26:45,962 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2024-10-31 17:26:46,135 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 17:26:46,138 INFO L407 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 17:26:46,140 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.