/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/byte_add_2-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.5-dev-b75d321-m [2024-11-02 22:38:31,762 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-02 22:38:31,838 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Bitvector.epf [2024-11-02 22:38:31,843 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-02 22:38:31,843 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-02 22:38:31,872 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-02 22:38:31,874 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-02 22:38:31,875 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-02 22:38:31,875 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-02 22:38:31,877 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-02 22:38:31,877 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-02 22:38:31,877 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-02 22:38:31,878 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-02 22:38:31,880 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-02 22:38:31,880 INFO L153 SettingsManager]: * Use SBE=true [2024-11-02 22:38:31,881 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-02 22:38:31,881 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-02 22:38:31,881 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-02 22:38:31,881 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-02 22:38:31,881 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-02 22:38:31,882 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-02 22:38:31,884 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-02 22:38:31,884 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-02 22:38:31,884 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-02 22:38:31,884 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-11-02 22:38:31,885 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-02 22:38:31,885 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-11-02 22:38:31,885 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-02 22:38:31,885 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-02 22:38:31,885 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-02 22:38:31,886 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-02 22:38:31,886 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-02 22:38:31,886 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-02 22:38:31,886 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-02 22:38:31,886 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-02 22:38:31,887 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-02 22:38:31,887 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-02 22:38:31,887 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-02 22:38:31,888 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2024-11-02 22:38:31,888 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-11-02 22:38:31,888 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-02 22:38:31,888 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-02 22:38:31,889 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-02 22:38:31,889 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-02 22:38:31,889 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Allow undefined functions -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Command for external solver -> z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 22:38:32,124 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-02 22:38:32,149 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-02 22:38:32,155 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-02 22:38:32,156 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-02 22:38:32,156 INFO L274 PluginConnector]: CDTParser initialized [2024-11-02 22:38:32,158 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/byte_add_2-2.i [2024-11-02 22:38:33,533 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-02 22:38:33,734 INFO L384 CDTParser]: Found 1 translation units. [2024-11-02 22:38:33,734 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/bitvector/byte_add_2-2.i [2024-11-02 22:38:33,741 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d095f0d52/f0b72a87654648009e4d9c995b7a6c6c/FLAG83bb24c93 [2024-11-02 22:38:33,752 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d095f0d52/f0b72a87654648009e4d9c995b7a6c6c [2024-11-02 22:38:33,754 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-02 22:38:33,755 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-11-02 22:38:33,756 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-02 22:38:33,756 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-02 22:38:33,762 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-02 22:38:33,763 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:38:33" (1/1) ... [2024-11-02 22:38:33,764 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27794f0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:38:33, skipping insertion in model container [2024-11-02 22:38:33,764 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:38:33" (1/1) ... [2024-11-02 22:38:33,792 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-02 22:38:33,952 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/bitvector/byte_add_2-2.i[1168,1181] [2024-11-02 22:38:34,006 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 22:38:34,025 INFO L200 MainTranslator]: Completed pre-run [2024-11-02 22:38:34,043 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/bitvector/byte_add_2-2.i[1168,1181] [2024-11-02 22:38:34,078 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 22:38:34,097 INFO L204 MainTranslator]: Completed translation [2024-11-02 22:38:34,098 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:38:34 WrapperNode [2024-11-02 22:38:34,098 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-02 22:38:34,099 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-02 22:38:34,099 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-02 22:38:34,099 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-02 22:38:34,105 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:38:34" (1/1) ... [2024-11-02 22:38:34,113 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:38:34" (1/1) ... [2024-11-02 22:38:34,137 INFO L138 Inliner]: procedures = 16, calls = 8, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 123 [2024-11-02 22:38:34,137 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-02 22:38:34,138 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-02 22:38:34,139 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-02 22:38:34,139 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-02 22:38:34,149 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:38:34" (1/1) ... [2024-11-02 22:38:34,149 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:38:34" (1/1) ... [2024-11-02 22:38:34,156 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:38:34" (1/1) ... [2024-11-02 22:38:34,174 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]. [2024-11-02 22:38:34,175 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:38:34" (1/1) ... [2024-11-02 22:38:34,175 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:38:34" (1/1) ... [2024-11-02 22:38:34,182 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:38:34" (1/1) ... [2024-11-02 22:38:34,186 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:38:34" (1/1) ... [2024-11-02 22:38:34,187 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:38:34" (1/1) ... [2024-11-02 22:38:34,188 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:38:34" (1/1) ... [2024-11-02 22:38:34,190 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-02 22:38:34,191 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-02 22:38:34,191 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-02 22:38:34,191 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-02 22:38:34,192 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:38:34" (1/1) ... [2024-11-02 22:38:34,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-02 22:38:34,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-02 22:38:34,226 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) [2024-11-02 22:38:34,228 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 [2024-11-02 22:38:34,248 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-02 22:38:34,248 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-11-02 22:38:34,248 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-02 22:38:34,248 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-02 22:38:34,303 INFO L238 CfgBuilder]: Building ICFG [2024-11-02 22:38:34,305 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-02 22:38:34,606 INFO L? ?]: Removed 23 outVars from TransFormulas that were not future-live. [2024-11-02 22:38:34,606 INFO L287 CfgBuilder]: Performing block encoding [2024-11-02 22:38:34,617 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-02 22:38:34,618 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-02 22:38:34,618 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:38:34 BoogieIcfgContainer [2024-11-02 22:38:34,618 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-02 22:38:34,620 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-02 22:38:34,620 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-02 22:38:34,622 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-02 22:38:34,622 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 10:38:33" (1/3) ... [2024-11-02 22:38:34,623 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20ac5d16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:38:34, skipping insertion in model container [2024-11-02 22:38:34,623 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:38:34" (2/3) ... [2024-11-02 22:38:34,623 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20ac5d16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:38:34, skipping insertion in model container [2024-11-02 22:38:34,623 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:38:34" (3/3) ... [2024-11-02 22:38:34,625 INFO L112 eAbstractionObserver]: Analyzing ICFG byte_add_2-2.i [2024-11-02 22:38:34,637 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-02 22:38:34,637 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-02 22:38:34,685 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-02 22:38:34,691 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;@44daf5fe, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-02 22:38:34,692 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-02 22:38:34,695 INFO L276 IsEmpty]: Start isEmpty. Operand has 42 states, 40 states have (on average 1.775) internal successors, (71), 41 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 22:38:34,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-02 22:38:34,701 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 22:38:34,701 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 22:38:34,702 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 22:38:34,705 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 22:38:34,706 INFO L85 PathProgramCache]: Analyzing trace with hash 255061167, now seen corresponding path program 1 times [2024-11-02 22:38:34,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-02 22:38:34,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1812484364] [2024-11-02 22:38:34,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 22:38:34,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 22:38:34,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-02 22:38:34,717 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) [2024-11-02 22:38:34,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-02 22:38:34,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 22:38:34,805 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 1 conjuncts are in the unsatisfiable core [2024-11-02 22:38:34,810 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 22:38:34,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 22:38:34,828 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 22:38:34,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 22:38:34,832 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-02 22:38:34,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1812484364] [2024-11-02 22:38:34,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1812484364] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-02 22:38:34,833 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-02 22:38:34,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2024-11-02 22:38:34,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470525572] [2024-11-02 22:38:34,835 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-02 22:38:34,838 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-02 22:38:34,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-02 22:38:34,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-02 22:38:34,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-02 22:38:34,856 INFO L87 Difference]: Start difference. First operand has 42 states, 40 states have (on average 1.775) internal successors, (71), 41 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 22:38:34,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 22:38:34,869 INFO L93 Difference]: Finished difference Result 57 states and 92 transitions. [2024-11-02 22:38:34,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-02 22:38:34,870 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2024-11-02 22:38:34,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 22:38:34,876 INFO L225 Difference]: With dead ends: 57 [2024-11-02 22:38:34,877 INFO L226 Difference]: Without dead ends: 38 [2024-11-02 22:38:34,879 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-02 22:38:34,882 INFO L432 NwaCegarLoop]: 68 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-02 22:38:34,883 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-02 22:38:34,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2024-11-02 22:38:34,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2024-11-02 22:38:34,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.7297297297297298) internal successors, (64), 37 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 22:38:34,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 64 transitions. [2024-11-02 22:38:34,912 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 64 transitions. Word has length 12 [2024-11-02 22:38:34,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 22:38:34,912 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 64 transitions. [2024-11-02 22:38:34,913 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 22:38:34,913 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 64 transitions. [2024-11-02 22:38:34,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-02 22:38:34,914 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 22:38:34,914 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 22:38:34,933 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-02 22:38:35,118 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 [2024-11-02 22:38:35,119 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 22:38:35,120 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 22:38:35,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1803477009, now seen corresponding path program 1 times [2024-11-02 22:38:35,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-02 22:38:35,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1864656240] [2024-11-02 22:38:35,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 22:38:35,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 22:38:35,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-02 22:38:35,139 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) [2024-11-02 22:38:35,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-02 22:38:35,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 22:38:35,203 INFO L255 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-02 22:38:35,204 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 22:38:35,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 22:38:35,241 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 22:38:35,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 22:38:35,258 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-02 22:38:35,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1864656240] [2024-11-02 22:38:35,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1864656240] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-02 22:38:35,262 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-02 22:38:35,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2024-11-02 22:38:35,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143063310] [2024-11-02 22:38:35,263 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-02 22:38:35,264 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-02 22:38:35,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-02 22:38:35,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-02 22:38:35,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-02 22:38:35,269 INFO L87 Difference]: Start difference. First operand 38 states and 64 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 22:38:35,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 22:38:35,490 INFO L93 Difference]: Finished difference Result 107 states and 191 transitions. [2024-11-02 22:38:35,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-02 22:38:35,492 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2024-11-02 22:38:35,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 22:38:35,493 INFO L225 Difference]: With dead ends: 107 [2024-11-02 22:38:35,493 INFO L226 Difference]: Without dead ends: 79 [2024-11-02 22:38:35,493 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-02 22:38:35,495 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 60 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-02 22:38:35,498 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 61 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-02 22:38:35,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2024-11-02 22:38:35,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 63. [2024-11-02 22:38:35,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.5161290322580645) internal successors, (94), 62 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 22:38:35,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 94 transitions. [2024-11-02 22:38:35,508 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 94 transitions. Word has length 12 [2024-11-02 22:38:35,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 22:38:35,509 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 94 transitions. [2024-11-02 22:38:35,509 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 22:38:35,509 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 94 transitions. [2024-11-02 22:38:35,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-02 22:38:35,510 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 22:38:35,510 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 22:38:35,527 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-02 22:38:35,714 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 [2024-11-02 22:38:35,715 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 22:38:35,716 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 22:38:35,716 INFO L85 PathProgramCache]: Analyzing trace with hash -235076041, now seen corresponding path program 1 times [2024-11-02 22:38:35,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-02 22:38:35,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [624870621] [2024-11-02 22:38:35,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 22:38:35,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 22:38:35,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-02 22:38:35,718 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) [2024-11-02 22:38:35,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-02 22:38:35,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 22:38:35,778 INFO L255 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-02 22:38:35,780 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 22:38:35,794 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-02 22:38:35,795 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 22:38:35,810 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-02 22:38:35,810 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-02 22:38:35,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [624870621] [2024-11-02 22:38:35,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [624870621] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-02 22:38:35,811 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-02 22:38:35,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2024-11-02 22:38:35,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227341963] [2024-11-02 22:38:35,811 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-02 22:38:35,812 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-02 22:38:35,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-02 22:38:35,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-02 22:38:35,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-02 22:38:35,813 INFO L87 Difference]: Start difference. First operand 63 states and 94 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 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) [2024-11-02 22:38:36,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 22:38:36,005 INFO L93 Difference]: Finished difference Result 141 states and 221 transitions. [2024-11-02 22:38:36,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-02 22:38:36,007 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2024-11-02 22:38:36,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 22:38:36,008 INFO L225 Difference]: With dead ends: 141 [2024-11-02 22:38:36,008 INFO L226 Difference]: Without dead ends: 93 [2024-11-02 22:38:36,009 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-02 22:38:36,010 INFO L432 NwaCegarLoop]: 41 mSDtfsCounter, 41 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-02 22:38:36,011 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 79 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-02 22:38:36,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2024-11-02 22:38:36,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 87. [2024-11-02 22:38:36,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.4883720930232558) internal successors, (128), 86 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 22:38:36,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 128 transitions. [2024-11-02 22:38:36,026 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 128 transitions. Word has length 24 [2024-11-02 22:38:36,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 22:38:36,027 INFO L471 AbstractCegarLoop]: Abstraction has 87 states and 128 transitions. [2024-11-02 22:38:36,027 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 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) [2024-11-02 22:38:36,027 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 128 transitions. [2024-11-02 22:38:36,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-02 22:38:36,030 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 22:38:36,030 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 22:38:36,043 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-02 22:38:36,230 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 [2024-11-02 22:38:36,231 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 22:38:36,231 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 22:38:36,232 INFO L85 PathProgramCache]: Analyzing trace with hash 730584695, now seen corresponding path program 1 times [2024-11-02 22:38:36,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-02 22:38:36,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1322265017] [2024-11-02 22:38:36,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 22:38:36,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 22:38:36,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-02 22:38:36,234 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) [2024-11-02 22:38:36,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-02 22:38:36,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 22:38:36,284 INFO L255 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-02 22:38:36,286 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 22:38:36,325 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-02 22:38:36,325 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 22:38:36,421 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-02 22:38:36,421 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-02 22:38:36,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1322265017] [2024-11-02 22:38:36,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1322265017] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-02 22:38:36,426 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-02 22:38:36,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2024-11-02 22:38:36,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398426828] [2024-11-02 22:38:36,426 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-02 22:38:36,427 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-02 22:38:36,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-02 22:38:36,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-02 22:38:36,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-02 22:38:36,428 INFO L87 Difference]: Start difference. First operand 87 states and 128 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 22:38:36,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 22:38:36,591 INFO L93 Difference]: Finished difference Result 244 states and 368 transitions. [2024-11-02 22:38:36,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-02 22:38:36,591 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2024-11-02 22:38:36,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 22:38:36,593 INFO L225 Difference]: With dead ends: 244 [2024-11-02 22:38:36,593 INFO L226 Difference]: Without dead ends: 165 [2024-11-02 22:38:36,594 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-02 22:38:36,595 INFO L432 NwaCegarLoop]: 76 mSDtfsCounter, 98 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 22:38:36,599 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 150 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 22:38:36,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2024-11-02 22:38:36,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 158. [2024-11-02 22:38:36,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 1.4777070063694266) internal successors, (232), 157 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 22:38:36,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 232 transitions. [2024-11-02 22:38:36,622 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 232 transitions. Word has length 24 [2024-11-02 22:38:36,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 22:38:36,623 INFO L471 AbstractCegarLoop]: Abstraction has 158 states and 232 transitions. [2024-11-02 22:38:36,623 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 22:38:36,623 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 232 transitions. [2024-11-02 22:38:36,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-02 22:38:36,627 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 22:38:36,627 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 22:38:36,644 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-02 22:38:36,828 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 [2024-11-02 22:38:36,828 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 22:38:36,829 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 22:38:36,829 INFO L85 PathProgramCache]: Analyzing trace with hash -331639239, now seen corresponding path program 1 times [2024-11-02 22:38:36,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-02 22:38:36,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1320081874] [2024-11-02 22:38:36,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 22:38:36,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 22:38:36,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-02 22:38:36,832 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) [2024-11-02 22:38:36,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-02 22:38:36,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 22:38:36,881 INFO L255 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-02 22:38:36,883 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 22:38:36,899 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-02 22:38:36,899 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 22:38:36,936 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-02 22:38:36,936 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-02 22:38:36,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1320081874] [2024-11-02 22:38:36,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1320081874] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-02 22:38:36,937 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-02 22:38:36,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2024-11-02 22:38:36,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570589055] [2024-11-02 22:38:36,937 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-02 22:38:36,937 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-02 22:38:36,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-02 22:38:36,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-02 22:38:36,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-02 22:38:36,939 INFO L87 Difference]: Start difference. First operand 158 states and 232 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 22:38:37,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 22:38:37,065 INFO L93 Difference]: Finished difference Result 457 states and 677 transitions. [2024-11-02 22:38:37,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-02 22:38:37,066 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2024-11-02 22:38:37,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 22:38:37,068 INFO L225 Difference]: With dead ends: 457 [2024-11-02 22:38:37,068 INFO L226 Difference]: Without dead ends: 309 [2024-11-02 22:38:37,069 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-02 22:38:37,070 INFO L432 NwaCegarLoop]: 75 mSDtfsCounter, 76 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 22:38:37,071 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 148 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 22:38:37,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2024-11-02 22:38:37,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 285. [2024-11-02 22:38:37,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 1.4612676056338028) internal successors, (415), 284 states have internal predecessors, (415), 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) [2024-11-02 22:38:37,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 415 transitions. [2024-11-02 22:38:37,090 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 415 transitions. Word has length 25 [2024-11-02 22:38:37,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 22:38:37,090 INFO L471 AbstractCegarLoop]: Abstraction has 285 states and 415 transitions. [2024-11-02 22:38:37,091 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 22:38:37,091 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 415 transitions. [2024-11-02 22:38:37,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-02 22:38:37,092 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 22:38:37,092 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 22:38:37,108 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-02 22:38:37,296 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 [2024-11-02 22:38:37,297 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 22:38:37,297 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 22:38:37,298 INFO L85 PathProgramCache]: Analyzing trace with hash 1606169286, now seen corresponding path program 1 times [2024-11-02 22:38:37,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-02 22:38:37,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [884576085] [2024-11-02 22:38:37,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 22:38:37,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 22:38:37,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-02 22:38:37,299 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) [2024-11-02 22:38:37,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-02 22:38:37,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 22:38:37,348 INFO L255 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-02 22:38:37,351 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 22:38:37,367 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-02 22:38:37,367 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 22:38:37,385 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-02 22:38:37,385 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-02 22:38:37,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [884576085] [2024-11-02 22:38:37,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [884576085] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-02 22:38:37,386 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-02 22:38:37,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2024-11-02 22:38:37,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330808637] [2024-11-02 22:38:37,386 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-02 22:38:37,386 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-02 22:38:37,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-02 22:38:37,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-02 22:38:37,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-02 22:38:37,389 INFO L87 Difference]: Start difference. First operand 285 states and 415 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 22:38:37,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 22:38:37,402 INFO L93 Difference]: Finished difference Result 291 states and 420 transitions. [2024-11-02 22:38:37,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 22:38:37,403 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2024-11-02 22:38:37,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 22:38:37,404 INFO L225 Difference]: With dead ends: 291 [2024-11-02 22:38:37,404 INFO L226 Difference]: Without dead ends: 142 [2024-11-02 22:38:37,407 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-02 22:38:37,408 INFO L432 NwaCegarLoop]: 47 mSDtfsCounter, 41 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-02 22:38:37,411 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 53 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-02 22:38:37,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2024-11-02 22:38:37,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2024-11-02 22:38:37,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 1.4184397163120568) internal successors, (200), 141 states have internal predecessors, (200), 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) [2024-11-02 22:38:37,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 200 transitions. [2024-11-02 22:38:37,427 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 200 transitions. Word has length 26 [2024-11-02 22:38:37,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 22:38:37,428 INFO L471 AbstractCegarLoop]: Abstraction has 142 states and 200 transitions. [2024-11-02 22:38:37,428 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 22:38:37,428 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 200 transitions. [2024-11-02 22:38:37,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-02 22:38:37,432 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 22:38:37,432 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 22:38:37,449 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-02 22:38:37,633 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 [2024-11-02 22:38:37,634 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 22:38:37,634 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 22:38:37,634 INFO L85 PathProgramCache]: Analyzing trace with hash 386830913, now seen corresponding path program 1 times [2024-11-02 22:38:37,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-02 22:38:37,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1109346970] [2024-11-02 22:38:37,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 22:38:37,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 22:38:37,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-02 22:38:37,636 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) [2024-11-02 22:38:37,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-02 22:38:37,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 22:38:37,691 INFO L255 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-02 22:38:37,693 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 22:38:37,712 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-02 22:38:37,712 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 22:38:37,729 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-02 22:38:37,729 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-02 22:38:37,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1109346970] [2024-11-02 22:38:37,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1109346970] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-02 22:38:37,730 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-02 22:38:37,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2024-11-02 22:38:37,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213460372] [2024-11-02 22:38:37,730 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-02 22:38:37,730 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-02 22:38:37,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-02 22:38:37,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-02 22:38:37,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-02 22:38:37,731 INFO L87 Difference]: Start difference. First operand 142 states and 200 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 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) [2024-11-02 22:38:37,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 22:38:37,752 INFO L93 Difference]: Finished difference Result 190 states and 261 transitions. [2024-11-02 22:38:37,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 22:38:37,753 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2024-11-02 22:38:37,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 22:38:37,754 INFO L225 Difference]: With dead ends: 190 [2024-11-02 22:38:37,754 INFO L226 Difference]: Without dead ends: 184 [2024-11-02 22:38:37,754 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-02 22:38:37,755 INFO L432 NwaCegarLoop]: 49 mSDtfsCounter, 4 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-02 22:38:37,755 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 135 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-02 22:38:37,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2024-11-02 22:38:37,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 162. [2024-11-02 22:38:37,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 1.4409937888198758) internal successors, (232), 161 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 22:38:37,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 232 transitions. [2024-11-02 22:38:37,765 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 232 transitions. Word has length 35 [2024-11-02 22:38:37,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 22:38:37,765 INFO L471 AbstractCegarLoop]: Abstraction has 162 states and 232 transitions. [2024-11-02 22:38:37,765 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 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) [2024-11-02 22:38:37,765 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 232 transitions. [2024-11-02 22:38:37,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-02 22:38:37,767 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 22:38:37,767 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 22:38:37,784 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-02 22:38:37,967 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 [2024-11-02 22:38:37,968 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 22:38:37,968 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 22:38:37,968 INFO L85 PathProgramCache]: Analyzing trace with hash 644996351, now seen corresponding path program 1 times [2024-11-02 22:38:37,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-02 22:38:37,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1976163382] [2024-11-02 22:38:37,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 22:38:37,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 22:38:37,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-02 22:38:37,970 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) [2024-11-02 22:38:37,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-02 22:38:38,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 22:38:38,029 INFO L255 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-02 22:38:38,030 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 22:38:38,074 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-02 22:38:38,074 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 22:38:38,111 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-02 22:38:38,111 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-02 22:38:38,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1976163382] [2024-11-02 22:38:38,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1976163382] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-02 22:38:38,112 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-02 22:38:38,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2024-11-02 22:38:38,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771804173] [2024-11-02 22:38:38,112 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-02 22:38:38,112 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-02 22:38:38,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-02 22:38:38,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-02 22:38:38,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-11-02 22:38:38,118 INFO L87 Difference]: Start difference. First operand 162 states and 232 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 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) [2024-11-02 22:38:38,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 22:38:38,423 INFO L93 Difference]: Finished difference Result 447 states and 646 transitions. [2024-11-02 22:38:38,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-02 22:38:38,424 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2024-11-02 22:38:38,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 22:38:38,426 INFO L225 Difference]: With dead ends: 447 [2024-11-02 22:38:38,426 INFO L226 Difference]: Without dead ends: 374 [2024-11-02 22:38:38,426 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2024-11-02 22:38:38,427 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 310 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 310 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-02 22:38:38,427 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [310 Valid, 122 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-02 22:38:38,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2024-11-02 22:38:38,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 251. [2024-11-02 22:38:38,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 250 states have (on average 1.436) internal successors, (359), 250 states have internal predecessors, (359), 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) [2024-11-02 22:38:38,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 359 transitions. [2024-11-02 22:38:38,438 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 359 transitions. Word has length 35 [2024-11-02 22:38:38,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 22:38:38,438 INFO L471 AbstractCegarLoop]: Abstraction has 251 states and 359 transitions. [2024-11-02 22:38:38,439 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 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) [2024-11-02 22:38:38,439 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 359 transitions. [2024-11-02 22:38:38,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-11-02 22:38:38,440 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 22:38:38,440 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 22:38:38,458 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-02 22:38:38,641 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 [2024-11-02 22:38:38,641 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 22:38:38,642 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 22:38:38,642 INFO L85 PathProgramCache]: Analyzing trace with hash 2086747953, now seen corresponding path program 1 times [2024-11-02 22:38:38,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-02 22:38:38,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1004344323] [2024-11-02 22:38:38,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 22:38:38,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 22:38:38,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-02 22:38:38,644 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) [2024-11-02 22:38:38,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-02 22:38:38,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 22:38:38,694 INFO L255 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-02 22:38:38,696 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 22:38:38,740 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 22:38:38,740 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 22:38:38,778 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 22:38:38,779 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-02 22:38:38,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1004344323] [2024-11-02 22:38:38,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1004344323] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 22:38:38,779 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-02 22:38:38,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2024-11-02 22:38:38,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330592228] [2024-11-02 22:38:38,779 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-02 22:38:38,780 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-02 22:38:38,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-02 22:38:38,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-02 22:38:38,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-02 22:38:38,780 INFO L87 Difference]: Start difference. First operand 251 states and 359 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 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) [2024-11-02 22:38:38,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 22:38:38,876 INFO L93 Difference]: Finished difference Result 531 states and 758 transitions. [2024-11-02 22:38:38,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-02 22:38:38,876 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2024-11-02 22:38:38,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 22:38:38,878 INFO L225 Difference]: With dead ends: 531 [2024-11-02 22:38:38,878 INFO L226 Difference]: Without dead ends: 290 [2024-11-02 22:38:38,878 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-02 22:38:38,879 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 15 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 22:38:38,879 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 55 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 22:38:38,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2024-11-02 22:38:38,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 269. [2024-11-02 22:38:38,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 1.4104477611940298) internal successors, (378), 268 states have internal predecessors, (378), 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) [2024-11-02 22:38:38,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 378 transitions. [2024-11-02 22:38:38,909 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 378 transitions. Word has length 38 [2024-11-02 22:38:38,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 22:38:38,910 INFO L471 AbstractCegarLoop]: Abstraction has 269 states and 378 transitions. [2024-11-02 22:38:38,910 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), 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) [2024-11-02 22:38:38,910 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 378 transitions. [2024-11-02 22:38:38,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-02 22:38:38,912 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 22:38:38,912 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 22:38:38,929 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-02 22:38:39,116 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 [2024-11-02 22:38:39,117 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 22:38:39,117 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 22:38:39,117 INFO L85 PathProgramCache]: Analyzing trace with hash -1822068338, now seen corresponding path program 1 times [2024-11-02 22:38:39,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-02 22:38:39,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [272526438] [2024-11-02 22:38:39,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 22:38:39,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 22:38:39,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-02 22:38:39,119 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) [2024-11-02 22:38:39,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-02 22:38:39,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 22:38:39,172 INFO L255 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-02 22:38:39,174 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 22:38:39,212 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-02 22:38:39,212 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 22:38:39,242 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-02 22:38:39,242 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-02 22:38:39,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [272526438] [2024-11-02 22:38:39,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [272526438] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-02 22:38:39,243 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-02 22:38:39,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2024-11-02 22:38:39,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020106393] [2024-11-02 22:38:39,243 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-02 22:38:39,243 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-02 22:38:39,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-02 22:38:39,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-02 22:38:39,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-02 22:38:39,246 INFO L87 Difference]: Start difference. First operand 269 states and 378 transitions. Second operand has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 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) [2024-11-02 22:38:39,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 22:38:39,455 INFO L93 Difference]: Finished difference Result 786 states and 1131 transitions. [2024-11-02 22:38:39,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-02 22:38:39,456 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2024-11-02 22:38:39,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 22:38:39,458 INFO L225 Difference]: With dead ends: 786 [2024-11-02 22:38:39,458 INFO L226 Difference]: Without dead ends: 513 [2024-11-02 22:38:39,459 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-11-02 22:38:39,460 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 95 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-02 22:38:39,461 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 58 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-02 22:38:39,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2024-11-02 22:38:39,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 393. [2024-11-02 22:38:39,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 392 states have (on average 1.3979591836734695) internal successors, (548), 392 states have internal predecessors, (548), 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) [2024-11-02 22:38:39,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 548 transitions. [2024-11-02 22:38:39,479 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 548 transitions. Word has length 44 [2024-11-02 22:38:39,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 22:38:39,479 INFO L471 AbstractCegarLoop]: Abstraction has 393 states and 548 transitions. [2024-11-02 22:38:39,479 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 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) [2024-11-02 22:38:39,479 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 548 transitions. [2024-11-02 22:38:39,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-11-02 22:38:39,482 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 22:38:39,482 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 22:38:39,499 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-02 22:38:39,682 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 [2024-11-02 22:38:39,683 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 22:38:39,683 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 22:38:39,683 INFO L85 PathProgramCache]: Analyzing trace with hash 1373021230, now seen corresponding path program 1 times [2024-11-02 22:38:39,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-02 22:38:39,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [940965840] [2024-11-02 22:38:39,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 22:38:39,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 22:38:39,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-02 22:38:39,685 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) [2024-11-02 22:38:39,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-02 22:38:39,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 22:38:39,752 INFO L255 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-02 22:38:39,754 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 22:38:39,862 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 54 proven. 3 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-02 22:38:39,862 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 22:38:39,958 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 49 proven. 8 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-02 22:38:39,959 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-02 22:38:39,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [940965840] [2024-11-02 22:38:39,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [940965840] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 22:38:39,959 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-02 22:38:39,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2024-11-02 22:38:39,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247755234] [2024-11-02 22:38:39,959 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-02 22:38:39,960 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-02 22:38:39,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-02 22:38:39,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-02 22:38:39,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-11-02 22:38:39,961 INFO L87 Difference]: Start difference. First operand 393 states and 548 transitions. Second operand has 10 states, 10 states have (on average 9.0) internal successors, (90), 10 states have internal predecessors, (90), 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) [2024-11-02 22:38:40,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 22:38:40,220 INFO L93 Difference]: Finished difference Result 1165 states and 1601 transitions. [2024-11-02 22:38:40,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-02 22:38:40,221 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 9.0) internal successors, (90), 10 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2024-11-02 22:38:40,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 22:38:40,224 INFO L225 Difference]: With dead ends: 1165 [2024-11-02 22:38:40,224 INFO L226 Difference]: Without dead ends: 795 [2024-11-02 22:38:40,225 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2024-11-02 22:38:40,225 INFO L432 NwaCegarLoop]: 60 mSDtfsCounter, 214 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 22:38:40,226 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 240 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 22:38:40,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 795 states. [2024-11-02 22:38:40,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 795 to 540. [2024-11-02 22:38:40,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 539 states have (on average 1.4285714285714286) internal successors, (770), 539 states have internal predecessors, (770), 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) [2024-11-02 22:38:40,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 770 transitions. [2024-11-02 22:38:40,248 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 770 transitions. Word has length 70 [2024-11-02 22:38:40,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 22:38:40,248 INFO L471 AbstractCegarLoop]: Abstraction has 540 states and 770 transitions. [2024-11-02 22:38:40,248 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.0) internal successors, (90), 10 states have internal predecessors, (90), 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) [2024-11-02 22:38:40,248 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 770 transitions. [2024-11-02 22:38:40,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-11-02 22:38:40,249 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 22:38:40,249 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 22:38:40,267 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-02 22:38:40,453 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 [2024-11-02 22:38:40,454 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 22:38:40,455 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 22:38:40,455 INFO L85 PathProgramCache]: Analyzing trace with hash 343661932, now seen corresponding path program 2 times [2024-11-02 22:38:40,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-02 22:38:40,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [172680844] [2024-11-02 22:38:40,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 22:38:40,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 22:38:40,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-02 22:38:40,456 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) [2024-11-02 22:38:40,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-02 22:38:40,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 22:38:40,521 INFO L255 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-02 22:38:40,523 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 22:38:40,654 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 66 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-02 22:38:40,654 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 22:38:40,716 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 68 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-02 22:38:40,716 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-02 22:38:40,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [172680844] [2024-11-02 22:38:40,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [172680844] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 22:38:40,717 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-02 22:38:40,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2024-11-02 22:38:40,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11280052] [2024-11-02 22:38:40,717 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-02 22:38:40,717 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-02 22:38:40,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-02 22:38:40,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-02 22:38:40,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-11-02 22:38:40,718 INFO L87 Difference]: Start difference. First operand 540 states and 770 transitions. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 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) [2024-11-02 22:38:40,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 22:38:40,990 INFO L93 Difference]: Finished difference Result 1351 states and 1852 transitions. [2024-11-02 22:38:40,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-02 22:38:40,990 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2024-11-02 22:38:40,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 22:38:40,995 INFO L225 Difference]: With dead ends: 1351 [2024-11-02 22:38:40,995 INFO L226 Difference]: Without dead ends: 834 [2024-11-02 22:38:40,996 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2024-11-02 22:38:40,997 INFO L432 NwaCegarLoop]: 65 mSDtfsCounter, 118 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 22:38:40,997 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 290 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 22:38:40,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 834 states. [2024-11-02 22:38:41,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 834 to 515. [2024-11-02 22:38:41,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 514 states have (on average 1.4105058365758756) internal successors, (725), 514 states have internal predecessors, (725), 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) [2024-11-02 22:38:41,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 725 transitions. [2024-11-02 22:38:41,024 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 725 transitions. Word has length 70 [2024-11-02 22:38:41,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 22:38:41,026 INFO L471 AbstractCegarLoop]: Abstraction has 515 states and 725 transitions. [2024-11-02 22:38:41,026 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 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) [2024-11-02 22:38:41,026 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 725 transitions. [2024-11-02 22:38:41,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-11-02 22:38:41,027 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 22:38:41,027 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 22:38:41,045 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-02 22:38:41,230 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 [2024-11-02 22:38:41,230 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 22:38:41,231 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 22:38:41,231 INFO L85 PathProgramCache]: Analyzing trace with hash 484210542, now seen corresponding path program 3 times [2024-11-02 22:38:41,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-02 22:38:41,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [360725191] [2024-11-02 22:38:41,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 22:38:41,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 22:38:41,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-02 22:38:41,233 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) [2024-11-02 22:38:41,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-02 22:38:41,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 22:38:41,293 INFO L255 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-11-02 22:38:41,297 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 22:38:44,360 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 22:38:44,360 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 22:38:46,274 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 22:38:46,275 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-02 22:38:46,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [360725191] [2024-11-02 22:38:46,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [360725191] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 22:38:46,275 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-02 22:38:46,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24] total 45 [2024-11-02 22:38:46,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259484232] [2024-11-02 22:38:46,275 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-02 22:38:46,276 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-11-02 22:38:46,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-02 22:38:46,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-11-02 22:38:46,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1832, Unknown=0, NotChecked=0, Total=1980 [2024-11-02 22:38:46,278 INFO L87 Difference]: Start difference. First operand 515 states and 725 transitions. Second operand has 45 states, 45 states have (on average 3.066666666666667) internal successors, (138), 45 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 22:38:58,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 22:38:58,244 INFO L93 Difference]: Finished difference Result 1872 states and 2531 transitions. [2024-11-02 22:38:58,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2024-11-02 22:38:58,245 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 3.066666666666667) internal successors, (138), 45 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2024-11-02 22:38:58,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 22:38:58,250 INFO L225 Difference]: With dead ends: 1872 [2024-11-02 22:38:58,250 INFO L226 Difference]: Without dead ends: 1680 [2024-11-02 22:38:58,256 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3181 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=2453, Invalid=12799, Unknown=0, NotChecked=0, Total=15252 [2024-11-02 22:38:58,256 INFO L432 NwaCegarLoop]: 298 mSDtfsCounter, 1964 mSDsluCounter, 6441 mSDsCounter, 0 mSdLazyCounter, 4308 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1964 SdHoareTripleChecker+Valid, 6739 SdHoareTripleChecker+Invalid, 4475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 4308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2024-11-02 22:38:58,257 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1964 Valid, 6739 Invalid, 4475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 4308 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2024-11-02 22:38:58,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1680 states. [2024-11-02 22:38:58,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1680 to 1096. [2024-11-02 22:38:58,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1096 states, 1095 states have (on average 1.4191780821917808) internal successors, (1554), 1095 states have internal predecessors, (1554), 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) [2024-11-02 22:38:58,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1096 states to 1096 states and 1554 transitions. [2024-11-02 22:38:58,327 INFO L78 Accepts]: Start accepts. Automaton has 1096 states and 1554 transitions. Word has length 70 [2024-11-02 22:38:58,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 22:38:58,328 INFO L471 AbstractCegarLoop]: Abstraction has 1096 states and 1554 transitions. [2024-11-02 22:38:58,328 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 3.066666666666667) internal successors, (138), 45 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 22:38:58,328 INFO L276 IsEmpty]: Start isEmpty. Operand 1096 states and 1554 transitions. [2024-11-02 22:38:58,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-11-02 22:38:58,330 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 22:38:58,330 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 22:38:58,348 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-02 22:38:58,530 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 [2024-11-02 22:38:58,531 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 22:38:58,531 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 22:38:58,531 INFO L85 PathProgramCache]: Analyzing trace with hash -247756884, now seen corresponding path program 1 times [2024-11-02 22:38:58,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-02 22:38:58,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [604945951] [2024-11-02 22:38:58,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 22:38:58,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 22:38:58,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-02 22:38:58,533 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) [2024-11-02 22:38:58,534 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-02 22:38:58,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 22:38:58,592 INFO L255 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-02 22:38:58,593 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 22:38:58,647 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 46 proven. 3 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-02 22:38:58,647 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 22:38:58,758 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 48 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-02 22:38:58,758 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-02 22:38:58,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [604945951] [2024-11-02 22:38:58,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [604945951] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 22:38:58,759 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-02 22:38:58,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2024-11-02 22:38:58,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663821967] [2024-11-02 22:38:58,759 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-02 22:38:58,759 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-02 22:38:58,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-02 22:38:58,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-02 22:38:58,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-11-02 22:38:58,760 INFO L87 Difference]: Start difference. First operand 1096 states and 1554 transitions. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 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) [2024-11-02 22:38:59,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 22:38:59,341 INFO L93 Difference]: Finished difference Result 2089 states and 2963 transitions. [2024-11-02 22:38:59,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-02 22:38:59,341 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2024-11-02 22:38:59,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 22:38:59,345 INFO L225 Difference]: With dead ends: 2089 [2024-11-02 22:38:59,345 INFO L226 Difference]: Without dead ends: 1019 [2024-11-02 22:38:59,346 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=275, Unknown=0, NotChecked=0, Total=380 [2024-11-02 22:38:59,346 INFO L432 NwaCegarLoop]: 52 mSDtfsCounter, 361 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 811 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 850 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 811 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-02 22:38:59,347 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [361 Valid, 264 Invalid, 850 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 811 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-02 22:38:59,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1019 states. [2024-11-02 22:38:59,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1019 to 939. [2024-11-02 22:38:59,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 939 states, 938 states have (on average 1.2579957356076759) internal successors, (1180), 938 states have internal predecessors, (1180), 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) [2024-11-02 22:38:59,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 939 states to 939 states and 1180 transitions. [2024-11-02 22:38:59,398 INFO L78 Accepts]: Start accepts. Automaton has 939 states and 1180 transitions. Word has length 70 [2024-11-02 22:38:59,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 22:38:59,398 INFO L471 AbstractCegarLoop]: Abstraction has 939 states and 1180 transitions. [2024-11-02 22:38:59,398 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 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) [2024-11-02 22:38:59,398 INFO L276 IsEmpty]: Start isEmpty. Operand 939 states and 1180 transitions. [2024-11-02 22:38:59,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-11-02 22:38:59,399 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 22:38:59,399 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 22:38:59,416 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-02 22:38:59,603 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 [2024-11-02 22:38:59,604 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 22:38:59,604 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 22:38:59,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1891529833, now seen corresponding path program 1 times [2024-11-02 22:38:59,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-02 22:38:59,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1328708685] [2024-11-02 22:38:59,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 22:38:59,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 22:38:59,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-02 22:38:59,606 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) [2024-11-02 22:38:59,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-02 22:38:59,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 22:38:59,666 INFO L255 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-02 22:38:59,667 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 22:38:59,792 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 53 proven. 21 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-02 22:38:59,792 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 22:39:00,027 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 49 proven. 29 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-02 22:39:00,027 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-02 22:39:00,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1328708685] [2024-11-02 22:39:00,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1328708685] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 22:39:00,027 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-02 22:39:00,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2024-11-02 22:39:00,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948559355] [2024-11-02 22:39:00,028 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-02 22:39:00,028 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-02 22:39:00,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-02 22:39:00,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-02 22:39:00,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2024-11-02 22:39:00,029 INFO L87 Difference]: Start difference. First operand 939 states and 1180 transitions. Second operand has 14 states, 14 states have (on average 8.0) internal successors, (112), 14 states have internal predecessors, (112), 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) [2024-11-02 22:39:00,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 22:39:00,873 INFO L93 Difference]: Finished difference Result 1992 states and 2486 transitions. [2024-11-02 22:39:00,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-11-02 22:39:00,873 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 8.0) internal successors, (112), 14 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2024-11-02 22:39:00,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 22:39:00,876 INFO L225 Difference]: With dead ends: 1992 [2024-11-02 22:39:00,876 INFO L226 Difference]: Without dead ends: 1203 [2024-11-02 22:39:00,877 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=380, Invalid=1026, Unknown=0, NotChecked=0, Total=1406 [2024-11-02 22:39:00,878 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 568 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 664 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 568 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-02 22:39:00,878 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [568 Valid, 142 Invalid, 708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 664 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-02 22:39:00,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1203 states. [2024-11-02 22:39:00,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1203 to 1074. [2024-11-02 22:39:00,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1074 states, 1073 states have (on average 1.2395153774464118) internal successors, (1330), 1073 states have internal predecessors, (1330), 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) [2024-11-02 22:39:00,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1074 states to 1074 states and 1330 transitions. [2024-11-02 22:39:00,946 INFO L78 Accepts]: Start accepts. Automaton has 1074 states and 1330 transitions. Word has length 73 [2024-11-02 22:39:00,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 22:39:00,946 INFO L471 AbstractCegarLoop]: Abstraction has 1074 states and 1330 transitions. [2024-11-02 22:39:00,946 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 8.0) internal successors, (112), 14 states have internal predecessors, (112), 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) [2024-11-02 22:39:00,946 INFO L276 IsEmpty]: Start isEmpty. Operand 1074 states and 1330 transitions. [2024-11-02 22:39:00,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-11-02 22:39:00,948 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 22:39:00,948 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 22:39:00,966 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-02 22:39:01,148 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 [2024-11-02 22:39:01,149 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 22:39:01,149 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 22:39:01,149 INFO L85 PathProgramCache]: Analyzing trace with hash -1135042114, now seen corresponding path program 1 times [2024-11-02 22:39:01,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-02 22:39:01,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1868110380] [2024-11-02 22:39:01,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 22:39:01,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 22:39:01,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-02 22:39:01,151 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) [2024-11-02 22:39:01,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-02 22:39:01,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 22:39:01,206 INFO L255 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-11-02 22:39:01,209 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 22:39:03,646 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 22:39:03,646 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 22:39:06,148 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 22:39:06,148 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-02 22:39:06,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1868110380] [2024-11-02 22:39:06,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1868110380] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 22:39:06,148 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-02 22:39:06,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 47 [2024-11-02 22:39:06,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992559322] [2024-11-02 22:39:06,149 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-02 22:39:06,153 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-11-02 22:39:06,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-02 22:39:06,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-11-02 22:39:06,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=2006, Unknown=0, NotChecked=0, Total=2162 [2024-11-02 22:39:06,155 INFO L87 Difference]: Start difference. First operand 1074 states and 1330 transitions. Second operand has 47 states, 47 states have (on average 3.106382978723404) internal successors, (146), 47 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 22:39:34,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 22:39:34,797 INFO L93 Difference]: Finished difference Result 4439 states and 5388 transitions. [2024-11-02 22:39:34,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 159 states. [2024-11-02 22:39:34,798 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 3.106382978723404) internal successors, (146), 47 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2024-11-02 22:39:34,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 22:39:34,805 INFO L225 Difference]: With dead ends: 4439 [2024-11-02 22:39:34,805 INFO L226 Difference]: Without dead ends: 3651 [2024-11-02 22:39:34,813 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 200 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11571 ImplicationChecksByTransitivity, 26.4s TimeCoverageRelationStatistics Valid=5196, Invalid=35406, Unknown=0, NotChecked=0, Total=40602 [2024-11-02 22:39:34,814 INFO L432 NwaCegarLoop]: 404 mSDtfsCounter, 2218 mSDsluCounter, 8841 mSDsCounter, 0 mSdLazyCounter, 5460 mSolverCounterSat, 306 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2218 SdHoareTripleChecker+Valid, 9245 SdHoareTripleChecker+Invalid, 5766 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 306 IncrementalHoareTripleChecker+Valid, 5460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2024-11-02 22:39:34,814 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2218 Valid, 9245 Invalid, 5766 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [306 Valid, 5460 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2024-11-02 22:39:34,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3651 states. [2024-11-02 22:39:34,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3651 to 2012. [2024-11-02 22:39:34,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2012 states, 2011 states have (on average 1.2118349080059672) internal successors, (2437), 2011 states have internal predecessors, (2437), 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) [2024-11-02 22:39:34,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2012 states to 2012 states and 2437 transitions. [2024-11-02 22:39:34,972 INFO L78 Accepts]: Start accepts. Automaton has 2012 states and 2437 transitions. Word has length 74 [2024-11-02 22:39:34,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 22:39:34,972 INFO L471 AbstractCegarLoop]: Abstraction has 2012 states and 2437 transitions. [2024-11-02 22:39:34,972 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 3.106382978723404) internal successors, (146), 47 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 22:39:34,973 INFO L276 IsEmpty]: Start isEmpty. Operand 2012 states and 2437 transitions. [2024-11-02 22:39:34,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-11-02 22:39:34,974 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 22:39:34,975 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 22:39:34,992 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-02 22:39:35,175 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 [2024-11-02 22:39:35,175 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 22:39:35,175 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 22:39:35,176 INFO L85 PathProgramCache]: Analyzing trace with hash -777616002, now seen corresponding path program 1 times [2024-11-02 22:39:35,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-02 22:39:35,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [594928078] [2024-11-02 22:39:35,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 22:39:35,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 22:39:35,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-02 22:39:35,177 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) [2024-11-02 22:39:35,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-02 22:39:35,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 22:39:35,232 INFO L255 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-11-02 22:39:35,235 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 22:39:37,800 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 22:39:37,800 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 22:39:39,866 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 22:39:39,866 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-02 22:39:39,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [594928078] [2024-11-02 22:39:39,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [594928078] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 22:39:39,867 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-02 22:39:39,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 47 [2024-11-02 22:39:39,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636786474] [2024-11-02 22:39:39,867 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-02 22:39:39,867 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-11-02 22:39:39,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-02 22:39:39,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-11-02 22:39:39,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=2017, Unknown=0, NotChecked=0, Total=2162 [2024-11-02 22:39:39,869 INFO L87 Difference]: Start difference. First operand 2012 states and 2437 transitions. Second operand has 47 states, 47 states have (on average 3.106382978723404) internal successors, (146), 47 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 22:39:57,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 22:39:57,548 INFO L93 Difference]: Finished difference Result 4529 states and 5401 transitions. [2024-11-02 22:39:57,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2024-11-02 22:39:57,549 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 3.106382978723404) internal successors, (146), 47 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2024-11-02 22:39:57,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 22:39:57,556 INFO L225 Difference]: With dead ends: 4529 [2024-11-02 22:39:57,556 INFO L226 Difference]: Without dead ends: 3301 [2024-11-02 22:39:57,560 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4887 ImplicationChecksByTransitivity, 16.0s TimeCoverageRelationStatistics Valid=2542, Invalid=17764, Unknown=0, NotChecked=0, Total=20306 [2024-11-02 22:39:57,560 INFO L432 NwaCegarLoop]: 336 mSDtfsCounter, 1017 mSDsluCounter, 7356 mSDsCounter, 0 mSdLazyCounter, 4675 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1017 SdHoareTripleChecker+Valid, 7692 SdHoareTripleChecker+Invalid, 4776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 4675 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2024-11-02 22:39:57,561 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1017 Valid, 7692 Invalid, 4776 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 4675 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2024-11-02 22:39:57,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3301 states. [2024-11-02 22:39:57,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3301 to 2143. [2024-11-02 22:39:57,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2143 states, 2142 states have (on average 1.2128851540616246) internal successors, (2598), 2142 states have internal predecessors, (2598), 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) [2024-11-02 22:39:57,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2143 states to 2143 states and 2598 transitions. [2024-11-02 22:39:57,714 INFO L78 Accepts]: Start accepts. Automaton has 2143 states and 2598 transitions. Word has length 74 [2024-11-02 22:39:57,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 22:39:57,714 INFO L471 AbstractCegarLoop]: Abstraction has 2143 states and 2598 transitions. [2024-11-02 22:39:57,714 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 3.106382978723404) internal successors, (146), 47 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 22:39:57,714 INFO L276 IsEmpty]: Start isEmpty. Operand 2143 states and 2598 transitions. [2024-11-02 22:39:57,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2024-11-02 22:39:57,716 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 22:39:57,716 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 22:39:57,734 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-02 22:39:57,920 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 [2024-11-02 22:39:57,921 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 22:39:57,921 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 22:39:57,921 INFO L85 PathProgramCache]: Analyzing trace with hash 881251465, now seen corresponding path program 1 times [2024-11-02 22:39:57,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-02 22:39:57,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1793394782] [2024-11-02 22:39:57,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 22:39:57,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 22:39:57,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-02 22:39:57,923 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) [2024-11-02 22:39:57,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-02 22:39:58,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 22:39:58,004 INFO L255 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-11-02 22:39:58,007 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 22:40:00,863 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 22:40:00,864 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 22:40:03,499 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 22:40:03,499 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-02 22:40:03,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1793394782] [2024-11-02 22:40:03,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1793394782] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 22:40:03,500 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-02 22:40:03,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2024-11-02 22:40:03,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813871990] [2024-11-02 22:40:03,500 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-02 22:40:03,500 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-11-02 22:40:03,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-02 22:40:03,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-11-02 22:40:03,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=2289, Unknown=0, NotChecked=0, Total=2450 [2024-11-02 22:40:03,501 INFO L87 Difference]: Start difference. First operand 2143 states and 2598 transitions. Second operand has 50 states, 50 states have (on average 3.04) internal successors, (152), 50 states have internal predecessors, (152), 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)