/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/float-benchs/feedback_diverge.c -------------------------------------------------------------------------------- This is Ultimate 0.2.5-dev-b75d321-m [2024-11-02 22:49:46,766 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-02 22:49:46,827 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 22:49:46,833 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-02 22:49:46,833 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-02 22:49:46,855 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-02 22:49:46,856 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-02 22:49:46,856 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-02 22:49:46,857 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-02 22:49:46,858 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-02 22:49:46,858 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-02 22:49:46,858 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-02 22:49:46,859 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-02 22:49:46,859 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-02 22:49:46,859 INFO L153 SettingsManager]: * Use SBE=true [2024-11-02 22:49:46,859 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-02 22:49:46,859 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-02 22:49:46,860 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-02 22:49:46,860 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-02 22:49:46,860 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-02 22:49:46,860 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-02 22:49:46,864 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-02 22:49:46,864 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-02 22:49:46,864 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-02 22:49:46,864 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-11-02 22:49:46,864 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-02 22:49:46,864 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-11-02 22:49:46,865 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-02 22:49:46,865 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-02 22:49:46,865 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-02 22:49:46,865 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-02 22:49:46,865 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-02 22:49:46,865 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-02 22:49:46,866 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-02 22:49:46,866 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-02 22:49:46,866 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-02 22:49:46,866 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-02 22:49:46,866 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-02 22:49:46,866 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2024-11-02 22:49:46,867 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-11-02 22:49:46,867 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-02 22:49:46,867 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-02 22:49:46,867 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-02 22:49:46,867 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-02 22:49:46,868 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Allow undefined functions -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Command for external solver -> z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 22:49:47,102 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-02 22:49:47,125 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-02 22:49:47,127 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-02 22:49:47,128 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-02 22:49:47,129 INFO L274 PluginConnector]: CDTParser initialized [2024-11-02 22:49:47,130 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-benchs/feedback_diverge.c [2024-11-02 22:49:48,478 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-02 22:49:48,632 INFO L384 CDTParser]: Found 1 translation units. [2024-11-02 22:49:48,632 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-benchs/feedback_diverge.c [2024-11-02 22:49:48,638 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/34fefd8bc/d8900ab4910342d496c8939f66852186/FLAG956589dd2 [2024-11-02 22:49:49,048 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/34fefd8bc/d8900ab4910342d496c8939f66852186 [2024-11-02 22:49:49,050 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-02 22:49:49,051 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-11-02 22:49:49,052 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-02 22:49:49,052 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-02 22:49:49,057 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-02 22:49:49,058 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:49:49" (1/1) ... [2024-11-02 22:49:49,058 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b3fed2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:49:49, skipping insertion in model container [2024-11-02 22:49:49,059 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:49:49" (1/1) ... [2024-11-02 22:49:49,071 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-02 22:49:49,193 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/float-benchs/feedback_diverge.c[626,639] [2024-11-02 22:49:49,205 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 22:49:49,226 INFO L200 MainTranslator]: Completed pre-run [2024-11-02 22:49:49,235 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/float-benchs/feedback_diverge.c[626,639] [2024-11-02 22:49:49,238 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 22:49:49,251 INFO L204 MainTranslator]: Completed translation [2024-11-02 22:49:49,252 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:49:49 WrapperNode [2024-11-02 22:49:49,252 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-02 22:49:49,253 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-02 22:49:49,256 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-02 22:49:49,256 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-02 22:49:49,263 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:49:49" (1/1) ... [2024-11-02 22:49:49,270 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:49:49" (1/1) ... [2024-11-02 22:49:49,282 INFO L138 Inliner]: procedures = 17, calls = 10, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 48 [2024-11-02 22:49:49,282 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-02 22:49:49,283 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-02 22:49:49,283 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-02 22:49:49,283 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-02 22:49:49,298 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:49:49" (1/1) ... [2024-11-02 22:49:49,299 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:49:49" (1/1) ... [2024-11-02 22:49:49,302 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:49:49" (1/1) ... [2024-11-02 22:49:49,309 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 22:49:49,310 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:49:49" (1/1) ... [2024-11-02 22:49:49,310 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:49:49" (1/1) ... [2024-11-02 22:49:49,314 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:49:49" (1/1) ... [2024-11-02 22:49:49,316 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:49:49" (1/1) ... [2024-11-02 22:49:49,317 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:49:49" (1/1) ... [2024-11-02 22:49:49,318 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:49:49" (1/1) ... [2024-11-02 22:49:49,320 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-02 22:49:49,320 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-02 22:49:49,321 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-02 22:49:49,321 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-02 22:49:49,321 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:49:49" (1/1) ... [2024-11-02 22:49:49,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-02 22:49:49,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-02 22:49:49,348 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 22:49:49,353 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 22:49:49,371 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-02 22:49:49,371 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-11-02 22:49:49,371 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-02 22:49:49,371 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-02 22:49:49,425 INFO L238 CfgBuilder]: Building ICFG [2024-11-02 22:49:49,426 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-02 22:49:51,918 INFO L? ?]: Removed 10 outVars from TransFormulas that were not future-live. [2024-11-02 22:49:51,918 INFO L287 CfgBuilder]: Performing block encoding [2024-11-02 22:49:51,927 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-02 22:49:51,927 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-02 22:49:51,927 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:49:51 BoogieIcfgContainer [2024-11-02 22:49:51,927 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-02 22:49:51,929 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-02 22:49:51,929 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-02 22:49:51,932 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-02 22:49:51,932 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 10:49:49" (1/3) ... [2024-11-02 22:49:51,932 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ae92195 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:49:51, skipping insertion in model container [2024-11-02 22:49:51,933 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:49:49" (2/3) ... [2024-11-02 22:49:51,933 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ae92195 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:49:51, skipping insertion in model container [2024-11-02 22:49:51,933 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:49:51" (3/3) ... [2024-11-02 22:49:51,934 INFO L112 eAbstractionObserver]: Analyzing ICFG feedback_diverge.c [2024-11-02 22:49:51,947 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-02 22:49:51,947 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-02 22:49:51,987 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-02 22:49:51,992 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;@5974c275, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-02 22:49:51,992 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-02 22:49:51,995 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 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 22:49:51,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-02 22:49:51,999 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 22:49:52,000 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-02 22:49:52,000 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 22:49:52,007 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 22:49:52,007 INFO L85 PathProgramCache]: Analyzing trace with hash 889620925, now seen corresponding path program 1 times [2024-11-02 22:49:52,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-02 22:49:52,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [245586586] [2024-11-02 22:49:52,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 22:49:52,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 22:49:52,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-02 22:49:52,018 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 22:49:52,019 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 22:49:52,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 22:49:52,121 INFO L255 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-02 22:49:52,124 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 22:49:52,164 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 22:49:52,164 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 22:49:52,179 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 22:49:52,180 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-02 22:49:52,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [245586586] [2024-11-02 22:49:52,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [245586586] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-02 22:49:52,180 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-02 22:49:52,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2024-11-02 22:49:52,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33635442] [2024-11-02 22:49:52,182 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-02 22:49:52,185 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-02 22:49:52,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-02 22:49:52,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-02 22:49:52,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-02 22:49:52,204 INFO L87 Difference]: Start difference. First operand has 17 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 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 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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 22:49:52,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 22:49:52,246 INFO L93 Difference]: Finished difference Result 40 states and 54 transitions. [2024-11-02 22:49:52,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-02 22:49:52,251 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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 6 [2024-11-02 22:49:52,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 22:49:52,258 INFO L225 Difference]: With dead ends: 40 [2024-11-02 22:49:52,258 INFO L226 Difference]: Without dead ends: 21 [2024-11-02 22:49:52,260 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 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 22:49:52,264 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 14 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-02 22:49:52,265 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 36 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-02 22:49:52,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-11-02 22:49:52,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2024-11-02 22:49:52,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 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 22:49:52,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2024-11-02 22:49:52,288 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 6 [2024-11-02 22:49:52,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 22:49:52,288 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2024-11-02 22:49:52,288 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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 22:49:52,289 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2024-11-02 22:49:52,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-02 22:49:52,289 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 22:49:52,289 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-02 22:49:52,303 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 22:49:52,493 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 22:49:52,494 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 22:49:52,495 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 22:49:52,495 INFO L85 PathProgramCache]: Analyzing trace with hash -1044407619, now seen corresponding path program 1 times [2024-11-02 22:49:52,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-02 22:49:52,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [767480190] [2024-11-02 22:49:52,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 22:49:52,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 22:49:52,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-02 22:49:52,497 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 22:49:52,498 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 22:49:52,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 22:49:52,694 INFO L255 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-02 22:49:52,697 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 22:49:52,842 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 22:49:52,842 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 22:49:52,955 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 22:49:52,955 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-02 22:49:52,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [767480190] [2024-11-02 22:49:52,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [767480190] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 22:49:52,956 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-02 22:49:52,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2024-11-02 22:49:52,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553896642] [2024-11-02 22:49:52,956 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-02 22:49:52,957 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-02 22:49:52,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-02 22:49:52,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-02 22:49:52,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-11-02 22:49:52,963 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 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 22:49:53,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 22:49:53,102 INFO L93 Difference]: Finished difference Result 53 states and 62 transitions. [2024-11-02 22:49:53,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-02 22:49:53,103 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 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 16 [2024-11-02 22:49:53,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 22:49:53,103 INFO L225 Difference]: With dead ends: 53 [2024-11-02 22:49:53,103 INFO L226 Difference]: Without dead ends: 49 [2024-11-02 22:49:53,104 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2024-11-02 22:49:53,105 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 46 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 22:49:53,105 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 92 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 22:49:53,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-11-02 22:49:53,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2024-11-02 22:49:53,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.1458333333333333) internal successors, (55), 48 states have internal predecessors, (55), 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 22:49:53,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2024-11-02 22:49:53,111 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 16 [2024-11-02 22:49:53,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 22:49:53,112 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2024-11-02 22:49:53,112 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 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 22:49:53,112 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2024-11-02 22:49:53,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-02 22:49:53,113 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 22:49:53,113 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2024-11-02 22:49:53,143 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-02 22:49:53,313 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 22:49:53,314 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 22:49:53,315 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 22:49:53,315 INFO L85 PathProgramCache]: Analyzing trace with hash -912393027, now seen corresponding path program 2 times [2024-11-02 22:49:53,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-02 22:49:53,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1735483089] [2024-11-02 22:49:53,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 22:49:53,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 22:49:53,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-02 22:49:53,319 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 22:49:53,320 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 22:49:53,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 22:49:53,863 INFO L255 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-02 22:49:53,866 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 22:49:54,039 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 22:49:54,039 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 22:49:54,262 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 22:49:54,262 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-02 22:49:54,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1735483089] [2024-11-02 22:49:54,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1735483089] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 22:49:54,262 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-02 22:49:54,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2024-11-02 22:49:54,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335085747] [2024-11-02 22:49:54,263 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-02 22:49:54,263 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-02 22:49:54,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-02 22:49:54,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-02 22:49:54,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2024-11-02 22:49:54,265 INFO L87 Difference]: Start difference. First operand 49 states and 55 transitions. Second operand has 16 states, 16 states have (on average 4.25) internal successors, (68), 16 states have internal predecessors, (68), 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 22:49:54,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 22:49:54,770 INFO L93 Difference]: Finished difference Result 109 states and 130 transitions. [2024-11-02 22:49:54,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-02 22:49:54,771 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.25) internal successors, (68), 16 states have internal predecessors, (68), 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 36 [2024-11-02 22:49:54,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 22:49:54,772 INFO L225 Difference]: With dead ends: 109 [2024-11-02 22:49:54,772 INFO L226 Difference]: Without dead ends: 105 [2024-11-02 22:49:54,773 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=174, Invalid=288, Unknown=0, NotChecked=0, Total=462 [2024-11-02 22:49:54,773 INFO L432 NwaCegarLoop]: 48 mSDtfsCounter, 204 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-02 22:49:54,774 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [204 Valid, 368 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-02 22:49:54,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2024-11-02 22:49:54,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2024-11-02 22:49:54,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.1442307692307692) internal successors, (119), 104 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 22:49:54,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 119 transitions. [2024-11-02 22:49:54,782 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 119 transitions. Word has length 36 [2024-11-02 22:49:54,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 22:49:54,782 INFO L471 AbstractCegarLoop]: Abstraction has 105 states and 119 transitions. [2024-11-02 22:49:54,783 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.25) internal successors, (68), 16 states have internal predecessors, (68), 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 22:49:54,783 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 119 transitions. [2024-11-02 22:49:54,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2024-11-02 22:49:54,784 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 22:49:54,784 INFO L215 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1] [2024-11-02 22:49:54,844 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-02 22:49:54,984 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 22:49:54,985 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 22:49:54,986 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 22:49:54,986 INFO L85 PathProgramCache]: Analyzing trace with hash 1724629181, now seen corresponding path program 3 times [2024-11-02 22:49:54,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-02 22:49:54,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [653037805] [2024-11-02 22:49:54,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 22:49:54,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 22:49:54,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-02 22:49:54,988 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 22:49:54,990 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 22:49:56,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 22:49:56,275 INFO L255 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-02 22:49:56,285 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 22:49:56,657 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 0 proven. 469 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 22:49:56,657 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 22:49:57,404 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 0 proven. 469 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 22:49:57,404 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-02 22:49:57,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [653037805] [2024-11-02 22:49:57,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [653037805] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 22:49:57,405 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-02 22:49:57,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2024-11-02 22:49:57,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680313806] [2024-11-02 22:49:57,405 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-02 22:49:57,406 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-02 22:49:57,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-02 22:49:57,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-02 22:49:57,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=706, Unknown=0, NotChecked=0, Total=992 [2024-11-02 22:49:57,408 INFO L87 Difference]: Start difference. First operand 105 states and 119 transitions. Second operand has 32 states, 32 states have (on average 4.625) internal successors, (148), 32 states have internal predecessors, (148), 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 22:49:59,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 22:49:59,370 INFO L93 Difference]: Finished difference Result 221 states and 266 transitions. [2024-11-02 22:49:59,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-02 22:49:59,371 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 4.625) internal successors, (148), 32 states have internal predecessors, (148), 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 76 [2024-11-02 22:49:59,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 22:49:59,372 INFO L225 Difference]: With dead ends: 221 [2024-11-02 22:49:59,372 INFO L226 Difference]: Without dead ends: 217 [2024-11-02 22:49:59,373 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=734, Invalid=1336, Unknown=0, NotChecked=0, Total=2070 [2024-11-02 22:49:59,374 INFO L432 NwaCegarLoop]: 96 mSDtfsCounter, 866 mSDsluCounter, 1404 mSDsCounter, 0 mSdLazyCounter, 509 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 866 SdHoareTripleChecker+Valid, 1500 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-02 22:49:59,374 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [866 Valid, 1500 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 509 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-02 22:49:59,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2024-11-02 22:49:59,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 217. [2024-11-02 22:49:59,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 1.1435185185185186) internal successors, (247), 216 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 22:49:59,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 247 transitions. [2024-11-02 22:49:59,388 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 247 transitions. Word has length 76 [2024-11-02 22:49:59,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 22:49:59,388 INFO L471 AbstractCegarLoop]: Abstraction has 217 states and 247 transitions. [2024-11-02 22:49:59,388 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 4.625) internal successors, (148), 32 states have internal predecessors, (148), 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 22:49:59,389 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 247 transitions. [2024-11-02 22:49:59,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2024-11-02 22:49:59,391 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 22:49:59,391 INFO L215 NwaCegarLoop]: trace histogram [30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1] [2024-11-02 22:49:59,519 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 22:49:59,594 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 22:49:59,595 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 22:49:59,595 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 22:49:59,595 INFO L85 PathProgramCache]: Analyzing trace with hash -722777923, now seen corresponding path program 4 times [2024-11-02 22:49:59,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-02 22:49:59,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1326182642] [2024-11-02 22:49:59,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 22:49:59,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 22:49:59,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-02 22:49:59,597 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 22:49:59,598 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 22:50:02,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 22:50:02,625 INFO L255 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-02 22:50:02,629 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 22:50:03,664 INFO L134 CoverageAnalysis]: Checked inductivity of 2205 backedges. 0 proven. 2205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 22:50:03,665 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 22:50:06,641 INFO L134 CoverageAnalysis]: Checked inductivity of 2205 backedges. 0 proven. 2205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 22:50:06,641 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-02 22:50:06,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1326182642] [2024-11-02 22:50:06,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1326182642] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 22:50:06,642 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-02 22:50:06,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 64 [2024-11-02 22:50:06,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803909139] [2024-11-02 22:50:06,642 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-02 22:50:06,645 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2024-11-02 22:50:06,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-02 22:50:06,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2024-11-02 22:50:06,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1086, Invalid=2946, Unknown=0, NotChecked=0, Total=4032 [2024-11-02 22:50:06,651 INFO L87 Difference]: Start difference. First operand 217 states and 247 transitions. Second operand has 64 states, 64 states have (on average 4.8125) internal successors, (308), 64 states have internal predecessors, (308), 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 22:50:20,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 22:50:20,760 INFO L93 Difference]: Finished difference Result 445 states and 538 transitions. [2024-11-02 22:50:20,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2024-11-02 22:50:20,763 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 4.8125) internal successors, (308), 64 states have internal predecessors, (308), 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 156 [2024-11-02 22:50:20,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 22:50:20,765 INFO L225 Difference]: With dead ends: 445 [2024-11-02 22:50:20,765 INFO L226 Difference]: Without dead ends: 441 [2024-11-02 22:50:20,771 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 15.8s TimeCoverageRelationStatistics Valid=3006, Invalid=5736, Unknown=0, NotChecked=0, Total=8742 [2024-11-02 22:50:20,772 INFO L432 NwaCegarLoop]: 192 mSDtfsCounter, 3030 mSDsluCounter, 5892 mSDsCounter, 0 mSdLazyCounter, 2047 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3030 SdHoareTripleChecker+Valid, 6084 SdHoareTripleChecker+Invalid, 2049 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 2047 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-11-02 22:50:20,772 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3030 Valid, 6084 Invalid, 2049 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 2047 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-11-02 22:50:20,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2024-11-02 22:50:20,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 441. [2024-11-02 22:50:20,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 440 states have (on average 1.143181818181818) internal successors, (503), 440 states have internal predecessors, (503), 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 22:50:20,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 503 transitions. [2024-11-02 22:50:20,799 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 503 transitions. Word has length 156 [2024-11-02 22:50:20,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 22:50:20,800 INFO L471 AbstractCegarLoop]: Abstraction has 441 states and 503 transitions. [2024-11-02 22:50:20,800 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 4.8125) internal successors, (308), 64 states have internal predecessors, (308), 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 22:50:20,800 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 503 transitions. [2024-11-02 22:50:20,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2024-11-02 22:50:20,808 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 22:50:20,809 INFO L215 NwaCegarLoop]: trace histogram [62, 62, 62, 62, 62, 1, 1, 1, 1, 1, 1] [2024-11-02 22:50:21,010 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forcibly destroying the process [2024-11-02 22:50:21,069 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 137 [2024-11-02 22:50:21,069 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 22:50:21,069 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 22:50:21,070 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 22:50:21,071 INFO L85 PathProgramCache]: Analyzing trace with hash 1882871997, now seen corresponding path program 5 times [2024-11-02 22:50:21,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-02 22:50:21,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [43629263] [2024-11-02 22:50:21,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 22:50:21,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 22:50:21,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-02 22:50:21,075 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 22:50:21,078 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 22:50:27,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 22:50:27,174 INFO L255 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 64 conjuncts are in the unsatisfiable core [2024-11-02 22:50:27,181 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 22:50:30,227 INFO L134 CoverageAnalysis]: Checked inductivity of 9517 backedges. 0 proven. 9517 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 22:50:30,227 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 22:50:39,667 INFO L134 CoverageAnalysis]: Checked inductivity of 9517 backedges. 0 proven. 9517 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 22:50:39,668 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-02 22:50:39,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [43629263] [2024-11-02 22:50:39,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [43629263] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 22:50:39,668 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-02 22:50:39,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 128 [2024-11-02 22:50:39,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906690565] [2024-11-02 22:50:39,668 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-02 22:50:39,669 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2024-11-02 22:50:39,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-02 22:50:39,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2024-11-02 22:50:39,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4222, Invalid=12034, Unknown=0, NotChecked=0, Total=16256 [2024-11-02 22:50:39,676 INFO L87 Difference]: Start difference. First operand 441 states and 503 transitions. Second operand has 128 states, 128 states have (on average 4.90625) internal successors, (628), 128 states have internal predecessors, (628), 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)