/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 'cvc4 --incremental --print-success --lang smt' -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-356b6ba-m [2024-10-31 19:31:16,737 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-31 19:31:16,802 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Bitvector.epf [2024-10-31 19:31:16,807 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-31 19:31:16,807 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-31 19:31:16,837 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-31 19:31:16,837 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-31 19:31:16,838 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-31 19:31:16,838 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-31 19:31:16,838 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-31 19:31:16,839 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-31 19:31:16,839 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-31 19:31:16,841 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-31 19:31:16,842 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-31 19:31:16,842 INFO L153 SettingsManager]: * Use SBE=true [2024-10-31 19:31:16,842 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-31 19:31:16,842 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-31 19:31:16,843 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-31 19:31:16,843 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-31 19:31:16,843 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-31 19:31:16,843 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-31 19:31:16,844 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-31 19:31:16,845 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-31 19:31:16,845 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-31 19:31:16,845 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-10-31 19:31:16,845 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-31 19:31:16,846 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-10-31 19:31:16,846 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-31 19:31:16,846 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-31 19:31:16,846 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-31 19:31:16,846 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-31 19:31:16,847 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-31 19:31:16,847 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-31 19:31:16,847 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-31 19:31:16,847 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 19:31:16,847 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-31 19:31:16,848 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-31 19:31:16,848 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-31 19:31:16,848 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2024-10-31 19:31:16,848 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-10-31 19:31:16,848 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-31 19:31:16,848 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-31 19:31:16,848 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-31 19:31:16,848 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-31 19:31:16,849 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2024-10-31 19:31:16,849 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Allow undefined functions -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Command for external solver -> cvc4 --incremental --print-success --lang smt [2024-10-31 19:31:17,114 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-31 19:31:17,136 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-31 19:31:17,138 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-31 19:31:17,139 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-31 19:31:17,139 INFO L274 PluginConnector]: CDTParser initialized [2024-10-31 19:31:17,141 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/byte_add_2-2.i [2024-10-31 19:31:18,386 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-31 19:31:18,578 INFO L384 CDTParser]: Found 1 translation units. [2024-10-31 19:31:18,578 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/bitvector/byte_add_2-2.i [2024-10-31 19:31:18,584 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ca6009044/6f412d49e3394d678c90408f59a6f0f5/FLAGc082d909c [2024-10-31 19:31:18,956 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ca6009044/6f412d49e3394d678c90408f59a6f0f5 [2024-10-31 19:31:18,958 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-31 19:31:18,959 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-10-31 19:31:18,960 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-31 19:31:18,960 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-31 19:31:18,964 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-31 19:31:18,964 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 07:31:18" (1/1) ... [2024-10-31 19:31:18,965 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e1d7753 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 07:31:18, skipping insertion in model container [2024-10-31 19:31:18,965 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 07:31:18" (1/1) ... [2024-10-31 19:31:18,983 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-31 19:31:19,104 WARN L251 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/bitvector/byte_add_2-2.i[1168,1181] [2024-10-31 19:31:19,135 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 19:31:19,146 INFO L200 MainTranslator]: Completed pre-run [2024-10-31 19:31:19,155 WARN L251 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/bitvector/byte_add_2-2.i[1168,1181] [2024-10-31 19:31:19,187 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 19:31:19,203 INFO L204 MainTranslator]: Completed translation [2024-10-31 19:31:19,204 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 07:31:19 WrapperNode [2024-10-31 19:31:19,204 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-31 19:31:19,205 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-31 19:31:19,205 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-31 19:31:19,205 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-31 19:31:19,210 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 07:31:19" (1/1) ... [2024-10-31 19:31:19,218 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 07:31:19" (1/1) ... [2024-10-31 19:31:19,236 INFO L138 Inliner]: procedures = 16, calls = 8, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 123 [2024-10-31 19:31:19,236 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-31 19:31:19,240 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-31 19:31:19,240 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-31 19:31:19,240 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-31 19:31:19,247 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 07:31:19" (1/1) ... [2024-10-31 19:31:19,247 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 07:31:19" (1/1) ... [2024-10-31 19:31:19,249 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 07:31:19" (1/1) ... [2024-10-31 19:31:19,267 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-10-31 19:31:19,267 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 07:31:19" (1/1) ... [2024-10-31 19:31:19,268 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 07:31:19" (1/1) ... [2024-10-31 19:31:19,271 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 07:31:19" (1/1) ... [2024-10-31 19:31:19,274 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 07:31:19" (1/1) ... [2024-10-31 19:31:19,275 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 07:31:19" (1/1) ... [2024-10-31 19:31:19,276 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 07:31:19" (1/1) ... [2024-10-31 19:31:19,278 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-31 19:31:19,282 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-31 19:31:19,282 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-31 19:31:19,282 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-31 19:31:19,282 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 07:31:19" (1/1) ... [2024-10-31 19:31:19,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 19:31:19,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-31 19:31:19,308 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-31 19:31:19,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-31 19:31:19,332 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-31 19:31:19,332 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-10-31 19:31:19,332 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-31 19:31:19,332 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-31 19:31:19,391 INFO L238 CfgBuilder]: Building ICFG [2024-10-31 19:31:19,393 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-31 19:31:19,648 INFO L? ?]: Removed 23 outVars from TransFormulas that were not future-live. [2024-10-31 19:31:19,648 INFO L287 CfgBuilder]: Performing block encoding [2024-10-31 19:31:19,659 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-31 19:31:19,659 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-10-31 19:31:19,659 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 07:31:19 BoogieIcfgContainer [2024-10-31 19:31:19,659 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-31 19:31:19,661 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-31 19:31:19,661 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-31 19:31:19,663 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-31 19:31:19,663 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.10 07:31:18" (1/3) ... [2024-10-31 19:31:19,664 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ebeebe5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 07:31:19, skipping insertion in model container [2024-10-31 19:31:19,664 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 07:31:19" (2/3) ... [2024-10-31 19:31:19,664 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ebeebe5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 07:31:19, skipping insertion in model container [2024-10-31 19:31:19,664 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 07:31:19" (3/3) ... [2024-10-31 19:31:19,665 INFO L112 eAbstractionObserver]: Analyzing ICFG byte_add_2-2.i [2024-10-31 19:31:19,677 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-31 19:31:19,677 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-31 19:31:19,722 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-31 19:31:19,729 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;@7bffc4fa, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-31 19:31:19,729 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-31 19:31:19,734 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) [2024-10-31 19:31:19,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-10-31 19:31:19,739 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 19:31:19,740 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 19:31:19,740 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 19:31:19,744 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 19:31:19,745 INFO L85 PathProgramCache]: Analyzing trace with hash 255061167, now seen corresponding path program 1 times [2024-10-31 19:31:19,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 19:31:19,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1668318825] [2024-10-31 19:31:19,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 19:31:19,755 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-10-31 19:31:19,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-10-31 19:31:19,758 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-10-31 19:31:19,762 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (2)] Waiting until timeout for monitored process [2024-10-31 19:31:19,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 19:31:19,823 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 1 conjuncts are in the unsatisfiable core [2024-10-31 19:31:19,827 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 19:31:19,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 19:31:19,843 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 19:31:19,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 19:31:19,850 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 19:31:19,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1668318825] [2024-10-31 19:31:19,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1668318825] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 19:31:19,851 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 19:31:19,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2024-10-31 19:31:19,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420120235] [2024-10-31 19:31:19,854 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 19:31:19,857 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-31 19:31:19,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 19:31:19,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-31 19:31:19,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-31 19:31:19,875 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) [2024-10-31 19:31:19,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 19:31:19,890 INFO L93 Difference]: Finished difference Result 57 states and 92 transitions. [2024-10-31 19:31:19,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-31 19:31:19,893 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 [2024-10-31 19:31:19,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 19:31:19,900 INFO L225 Difference]: With dead ends: 57 [2024-10-31 19:31:19,900 INFO L226 Difference]: Without dead ends: 38 [2024-10-31 19:31:19,903 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 [2024-10-31 19:31:19,908 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 [2024-10-31 19:31:19,908 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] [2024-10-31 19:31:19,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2024-10-31 19:31:19,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2024-10-31 19:31:19,935 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) [2024-10-31 19:31:19,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 64 transitions. [2024-10-31 19:31:19,939 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 64 transitions. Word has length 12 [2024-10-31 19:31:19,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 19:31:19,939 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 64 transitions. [2024-10-31 19:31:19,940 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) [2024-10-31 19:31:19,940 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 64 transitions. [2024-10-31 19:31:19,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-10-31 19:31:19,941 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 19:31:19,942 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 19:31:19,945 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (2)] Forceful destruction successful, exit code 0 [2024-10-31 19:31:20,143 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-10-31 19:31:20,143 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 19:31:20,144 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 19:31:20,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1803477009, now seen corresponding path program 1 times [2024-10-31 19:31:20,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 19:31:20,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [611623484] [2024-10-31 19:31:20,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 19:31:20,145 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-10-31 19:31:20,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-10-31 19:31:20,169 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-10-31 19:31:20,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (3)] Waiting until timeout for monitored process [2024-10-31 19:31:20,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 19:31:20,228 INFO L255 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-31 19:31:20,230 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 19:31:20,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 19:31:20,291 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 19:31:20,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 19:31:20,325 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 19:31:20,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [611623484] [2024-10-31 19:31:20,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [611623484] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 19:31:20,325 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 19:31:20,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2024-10-31 19:31:20,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925084870] [2024-10-31 19:31:20,325 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 19:31:20,327 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-31 19:31:20,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 19:31:20,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-31 19:31:20,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2024-10-31 19:31:20,330 INFO L87 Difference]: Start difference. First operand 38 states and 64 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:31:20,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 19:31:20,623 INFO L93 Difference]: Finished difference Result 141 states and 255 transitions. [2024-10-31 19:31:20,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-31 19:31:20,624 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 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 [2024-10-31 19:31:20,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 19:31:20,625 INFO L225 Difference]: With dead ends: 141 [2024-10-31 19:31:20,625 INFO L226 Difference]: Without dead ends: 113 [2024-10-31 19:31:20,625 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2024-10-31 19:31:20,626 INFO L432 NwaCegarLoop]: 44 mSDtfsCounter, 154 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-31 19:31:20,627 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 150 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-31 19:31:20,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2024-10-31 19:31:20,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 101. [2024-10-31 19:31:20,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.67) internal successors, (167), 100 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:31:20,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 167 transitions. [2024-10-31 19:31:20,643 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 167 transitions. Word has length 12 [2024-10-31 19:31:20,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 19:31:20,643 INFO L471 AbstractCegarLoop]: Abstraction has 101 states and 167 transitions. [2024-10-31 19:31:20,643 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:31:20,644 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 167 transitions. [2024-10-31 19:31:20,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-10-31 19:31:20,644 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 19:31:20,644 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 19:31:20,648 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (3)] Ended with exit code 0 [2024-10-31 19:31:20,845 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-10-31 19:31:20,845 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 19:31:20,846 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 19:31:20,846 INFO L85 PathProgramCache]: Analyzing trace with hash 583572890, now seen corresponding path program 1 times [2024-10-31 19:31:20,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 19:31:20,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [842824137] [2024-10-31 19:31:20,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 19:31:20,846 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-10-31 19:31:20,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-10-31 19:31:20,848 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-10-31 19:31:20,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2024-10-31 19:31:20,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 19:31:20,888 INFO L255 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-31 19:31:20,890 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 19:31:20,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 19:31:20,902 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 19:31:20,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 19:31:20,914 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 19:31:20,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [842824137] [2024-10-31 19:31:20,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [842824137] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 19:31:20,915 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 19:31:20,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2024-10-31 19:31:20,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363002679] [2024-10-31 19:31:20,915 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 19:31:20,915 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 19:31:20,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 19:31:20,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 19:31:20,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-31 19:31:20,916 INFO L87 Difference]: Start difference. First operand 101 states and 167 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:31:20,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 19:31:20,927 INFO L93 Difference]: Finished difference Result 112 states and 182 transitions. [2024-10-31 19:31:20,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 19:31:20,927 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 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 14 [2024-10-31 19:31:20,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 19:31:20,928 INFO L225 Difference]: With dead ends: 112 [2024-10-31 19:31:20,928 INFO L226 Difference]: Without dead ends: 60 [2024-10-31 19:31:20,929 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-31 19:31:20,929 INFO L432 NwaCegarLoop]: 57 mSDtfsCounter, 52 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 63 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 [2024-10-31 19:31:20,930 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 63 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 19:31:20,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-10-31 19:31:20,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2024-10-31 19:31:20,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.5254237288135593) internal successors, (90), 59 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) [2024-10-31 19:31:20,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 90 transitions. [2024-10-31 19:31:20,938 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 90 transitions. Word has length 14 [2024-10-31 19:31:20,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 19:31:20,938 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 90 transitions. [2024-10-31 19:31:20,938 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:31:20,940 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 90 transitions. [2024-10-31 19:31:20,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-10-31 19:31:20,941 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 19:31:20,941 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] [2024-10-31 19:31:20,944 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (4)] Ended with exit code 0 [2024-10-31 19:31:21,142 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-10-31 19:31:21,142 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 19:31:21,143 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 19:31:21,143 INFO L85 PathProgramCache]: Analyzing trace with hash 1444715377, now seen corresponding path program 1 times [2024-10-31 19:31:21,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 19:31:21,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1653617487] [2024-10-31 19:31:21,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 19:31:21,143 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-10-31 19:31:21,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-10-31 19:31:21,147 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-10-31 19:31:21,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2024-10-31 19:31:21,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 19:31:21,207 INFO L255 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-31 19:31:21,208 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 19:31:21,218 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-31 19:31:21,218 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 19:31:21,227 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-31 19:31:21,227 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 19:31:21,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1653617487] [2024-10-31 19:31:21,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1653617487] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 19:31:21,227 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 19:31:21,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2024-10-31 19:31:21,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506133791] [2024-10-31 19:31:21,228 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 19:31:21,228 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 19:31:21,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 19:31:21,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 19:31:21,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-31 19:31:21,229 INFO L87 Difference]: Start difference. First operand 60 states and 90 transitions. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:31:21,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 19:31:21,366 INFO L93 Difference]: Finished difference Result 150 states and 241 transitions. [2024-10-31 19:31:21,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 19:31:21,367 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 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 [2024-10-31 19:31:21,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 19:31:21,367 INFO L225 Difference]: With dead ends: 150 [2024-10-31 19:31:21,367 INFO L226 Difference]: Without dead ends: 101 [2024-10-31 19:31:21,368 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-31 19:31:21,369 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 43 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 19:31:21,369 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 57 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 19:31:21,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2024-10-31 19:31:21,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 99. [2024-10-31 19:31:21,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.5) internal successors, (147), 98 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:31:21,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 147 transitions. [2024-10-31 19:31:21,375 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 147 transitions. Word has length 38 [2024-10-31 19:31:21,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 19:31:21,376 INFO L471 AbstractCegarLoop]: Abstraction has 99 states and 147 transitions. [2024-10-31 19:31:21,376 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:31:21,376 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 147 transitions. [2024-10-31 19:31:21,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-10-31 19:31:21,377 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 19:31:21,377 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 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] [2024-10-31 19:31:21,381 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (5)] Ended with exit code 0 [2024-10-31 19:31:21,577 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-10-31 19:31:21,578 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 19:31:21,578 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 19:31:21,578 INFO L85 PathProgramCache]: Analyzing trace with hash -282496143, now seen corresponding path program 1 times [2024-10-31 19:31:21,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 19:31:21,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2053895422] [2024-10-31 19:31:21,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 19:31:21,579 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-10-31 19:31:21,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-10-31 19:31:21,580 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-10-31 19:31:21,582 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2024-10-31 19:31:21,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 19:31:21,631 INFO L255 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-31 19:31:21,632 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 19:31:21,645 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-10-31 19:31:21,646 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 19:31:21,660 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-10-31 19:31:21,660 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 19:31:21,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2053895422] [2024-10-31 19:31:21,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [2053895422] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 19:31:21,661 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 19:31:21,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2024-10-31 19:31:21,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668909146] [2024-10-31 19:31:21,661 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 19:31:21,661 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 19:31:21,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 19:31:21,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 19:31:21,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-31 19:31:21,662 INFO L87 Difference]: Start difference. First operand 99 states and 147 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) [2024-10-31 19:31:21,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 19:31:21,676 INFO L93 Difference]: Finished difference Result 140 states and 205 transitions. [2024-10-31 19:31:21,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 19:31:21,677 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 38 [2024-10-31 19:31:21,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 19:31:21,677 INFO L225 Difference]: With dead ends: 140 [2024-10-31 19:31:21,678 INFO L226 Difference]: Without dead ends: 121 [2024-10-31 19:31:21,678 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-31 19:31:21,678 INFO L432 NwaCegarLoop]: 59 mSDtfsCounter, 4 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 165 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 [2024-10-31 19:31:21,679 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 165 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 19:31:21,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2024-10-31 19:31:21,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 115. [2024-10-31 19:31:21,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.4912280701754386) internal successors, (170), 114 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:31:21,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 170 transitions. [2024-10-31 19:31:21,689 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 170 transitions. Word has length 38 [2024-10-31 19:31:21,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 19:31:21,689 INFO L471 AbstractCegarLoop]: Abstraction has 115 states and 170 transitions. [2024-10-31 19:31:21,690 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) [2024-10-31 19:31:21,690 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 170 transitions. [2024-10-31 19:31:21,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-10-31 19:31:21,691 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 19:31:21,691 INFO L215 NwaCegarLoop]: trace histogram [2, 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] [2024-10-31 19:31:21,697 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (6)] Forceful destruction successful, exit code 0 [2024-10-31 19:31:21,893 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-10-31 19:31:21,894 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 19:31:21,894 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 19:31:21,894 INFO L85 PathProgramCache]: Analyzing trace with hash -24330705, now seen corresponding path program 1 times [2024-10-31 19:31:21,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 19:31:21,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1712958997] [2024-10-31 19:31:21,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 19:31:21,895 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-10-31 19:31:21,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-10-31 19:31:21,896 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-10-31 19:31:21,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2024-10-31 19:31:21,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 19:31:21,960 INFO L255 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-31 19:31:21,961 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 19:31:21,993 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-31 19:31:21,993 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 19:31:22,011 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-31 19:31:22,011 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 19:31:22,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1712958997] [2024-10-31 19:31:22,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1712958997] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 19:31:22,012 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 19:31:22,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2024-10-31 19:31:22,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295397347] [2024-10-31 19:31:22,012 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 19:31:22,012 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-31 19:31:22,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 19:31:22,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-31 19:31:22,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2024-10-31 19:31:22,013 INFO L87 Difference]: Start difference. First operand 115 states and 170 transitions. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 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) [2024-10-31 19:31:22,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 19:31:22,258 INFO L93 Difference]: Finished difference Result 450 states and 682 transitions. [2024-10-31 19:31:22,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-31 19:31:22,258 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 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 [2024-10-31 19:31:22,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 19:31:22,260 INFO L225 Difference]: With dead ends: 450 [2024-10-31 19:31:22,260 INFO L226 Difference]: Without dead ends: 346 [2024-10-31 19:31:22,260 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2024-10-31 19:31:22,261 INFO L432 NwaCegarLoop]: 59 mSDtfsCounter, 134 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-31 19:31:22,261 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 170 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-31 19:31:22,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2024-10-31 19:31:22,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 211. [2024-10-31 19:31:22,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 1.4666666666666666) internal successors, (308), 210 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) [2024-10-31 19:31:22,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 308 transitions. [2024-10-31 19:31:22,280 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 308 transitions. Word has length 38 [2024-10-31 19:31:22,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 19:31:22,281 INFO L471 AbstractCegarLoop]: Abstraction has 211 states and 308 transitions. [2024-10-31 19:31:22,281 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:31:22,281 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 308 transitions. [2024-10-31 19:31:22,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-10-31 19:31:22,282 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 19:31:22,282 INFO L215 NwaCegarLoop]: trace histogram [2, 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] [2024-10-31 19:31:22,287 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (7)] Ended with exit code 0 [2024-10-31 19:31:22,483 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-10-31 19:31:22,483 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 19:31:22,483 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 19:31:22,484 INFO L85 PathProgramCache]: Analyzing trace with hash 247472538, now seen corresponding path program 1 times [2024-10-31 19:31:22,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 19:31:22,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1194868080] [2024-10-31 19:31:22,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 19:31:22,484 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-10-31 19:31:22,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-10-31 19:31:22,485 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-10-31 19:31:22,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2024-10-31 19:31:22,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 19:31:22,542 INFO L255 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-31 19:31:22,544 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 19:31:22,597 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-31 19:31:22,597 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 19:31:22,656 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-31 19:31:22,657 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 19:31:22,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1194868080] [2024-10-31 19:31:22,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1194868080] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 19:31:22,657 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 19:31:22,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2024-10-31 19:31:22,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938271182] [2024-10-31 19:31:22,658 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 19:31:22,658 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-31 19:31:22,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 19:31:22,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-31 19:31:22,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2024-10-31 19:31:22,659 INFO L87 Difference]: Start difference. First operand 211 states and 308 transitions. Second operand has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:31:22,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 19:31:22,991 INFO L93 Difference]: Finished difference Result 536 states and 809 transitions. [2024-10-31 19:31:22,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-31 19:31:22,992 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 12 states have internal predecessors, (43), 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 40 [2024-10-31 19:31:22,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 19:31:22,994 INFO L225 Difference]: With dead ends: 536 [2024-10-31 19:31:22,994 INFO L226 Difference]: Without dead ends: 432 [2024-10-31 19:31:22,994 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2024-10-31 19:31:22,995 INFO L432 NwaCegarLoop]: 63 mSDtfsCounter, 618 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 486 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 618 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-31 19:31:22,995 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [618 Valid, 287 Invalid, 516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 486 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-31 19:31:22,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2024-10-31 19:31:23,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 371. [2024-10-31 19:31:23,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 370 states have (on average 1.454054054054054) internal successors, (538), 370 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:31:23,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 538 transitions. [2024-10-31 19:31:23,021 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 538 transitions. Word has length 40 [2024-10-31 19:31:23,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 19:31:23,021 INFO L471 AbstractCegarLoop]: Abstraction has 371 states and 538 transitions. [2024-10-31 19:31:23,022 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:31:23,022 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 538 transitions. [2024-10-31 19:31:23,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-10-31 19:31:23,023 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 19:31:23,024 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] [2024-10-31 19:31:23,029 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (8)] Ended with exit code 0 [2024-10-31 19:31:23,224 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-10-31 19:31:23,224 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 19:31:23,225 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 19:31:23,225 INFO L85 PathProgramCache]: Analyzing trace with hash -390869275, now seen corresponding path program 1 times [2024-10-31 19:31:23,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 19:31:23,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1183095554] [2024-10-31 19:31:23,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 19:31:23,225 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-10-31 19:31:23,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-10-31 19:31:23,226 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-10-31 19:31:23,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2024-10-31 19:31:23,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 19:31:23,282 INFO L255 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-31 19:31:23,283 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 19:31:23,376 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 19:31:23,376 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 19:31:23,432 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 19:31:23,432 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 19:31:23,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1183095554] [2024-10-31 19:31:23,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1183095554] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 19:31:23,433 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 19:31:23,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2024-10-31 19:31:23,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302007452] [2024-10-31 19:31:23,433 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 19:31:23,433 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-31 19:31:23,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 19:31:23,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-31 19:31:23,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-10-31 19:31:23,434 INFO L87 Difference]: Start difference. First operand 371 states and 538 transitions. Second operand has 10 states, 10 states have (on average 6.8) internal successors, (68), 10 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) [2024-10-31 19:31:23,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 19:31:23,854 INFO L93 Difference]: Finished difference Result 712 states and 1049 transitions. [2024-10-31 19:31:23,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-31 19:31:23,854 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.8) internal successors, (68), 10 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 43 [2024-10-31 19:31:23,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 19:31:23,856 INFO L225 Difference]: With dead ends: 712 [2024-10-31 19:31:23,856 INFO L226 Difference]: Without dead ends: 436 [2024-10-31 19:31:23,857 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2024-10-31 19:31:23,857 INFO L432 NwaCegarLoop]: 46 mSDtfsCounter, 365 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 365 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-31 19:31:23,858 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [365 Valid, 221 Invalid, 625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 562 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-31 19:31:23,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2024-10-31 19:31:23,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 388. [2024-10-31 19:31:23,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 387 states have (on average 1.4806201550387597) internal successors, (573), 387 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:31:23,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 573 transitions. [2024-10-31 19:31:23,888 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 573 transitions. Word has length 43 [2024-10-31 19:31:23,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 19:31:23,888 INFO L471 AbstractCegarLoop]: Abstraction has 388 states and 573 transitions. [2024-10-31 19:31:23,888 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.8) internal successors, (68), 10 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) [2024-10-31 19:31:23,888 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 573 transitions. [2024-10-31 19:31:23,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-10-31 19:31:23,890 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 19:31:23,890 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] [2024-10-31 19:31:23,894 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (9)] Ended with exit code 0 [2024-10-31 19:31:24,091 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-10-31 19:31:24,091 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 19:31:24,091 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 19:31:24,091 INFO L85 PathProgramCache]: Analyzing trace with hash -1822068338, now seen corresponding path program 1 times [2024-10-31 19:31:24,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 19:31:24,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2045057093] [2024-10-31 19:31:24,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 19:31:24,092 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-10-31 19:31:24,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-10-31 19:31:24,093 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-10-31 19:31:24,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2024-10-31 19:31:24,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 19:31:24,161 INFO L255 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-31 19:31:24,162 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 19:31:24,295 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 19:31:24,296 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 19:31:24,365 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 19:31:24,366 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 19:31:24,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2045057093] [2024-10-31 19:31:24,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [2045057093] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 19:31:24,366 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 19:31:24,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2024-10-31 19:31:24,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232286153] [2024-10-31 19:31:24,366 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 19:31:24,366 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-31 19:31:24,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 19:31:24,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-31 19:31:24,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2024-10-31 19:31:24,367 INFO L87 Difference]: Start difference. First operand 388 states and 573 transitions. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:31:24,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 19:31:24,587 INFO L93 Difference]: Finished difference Result 978 states and 1507 transitions. [2024-10-31 19:31:24,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-31 19:31:24,587 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 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 [2024-10-31 19:31:24,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 19:31:24,589 INFO L225 Difference]: With dead ends: 978 [2024-10-31 19:31:24,590 INFO L226 Difference]: Without dead ends: 613 [2024-10-31 19:31:24,590 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2024-10-31 19:31:24,591 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 202 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-31 19:31:24,591 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 102 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-31 19:31:24,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2024-10-31 19:31:24,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 498. [2024-10-31 19:31:24,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 498 states, 497 states have (on average 1.448692152917505) internal successors, (720), 497 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:31:24,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 720 transitions. [2024-10-31 19:31:24,605 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 720 transitions. Word has length 44 [2024-10-31 19:31:24,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 19:31:24,605 INFO L471 AbstractCegarLoop]: Abstraction has 498 states and 720 transitions. [2024-10-31 19:31:24,606 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:31:24,606 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 720 transitions. [2024-10-31 19:31:24,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-10-31 19:31:24,606 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 19:31:24,606 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] [2024-10-31 19:31:24,609 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (10)] Ended with exit code 0 [2024-10-31 19:31:24,808 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-10-31 19:31:24,809 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 19:31:24,809 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 19:31:24,809 INFO L85 PathProgramCache]: Analyzing trace with hash 1373021230, now seen corresponding path program 1 times [2024-10-31 19:31:24,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 19:31:24,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [130646215] [2024-10-31 19:31:24,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 19:31:24,810 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-10-31 19:31:24,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-10-31 19:31:24,811 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-10-31 19:31:24,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2024-10-31 19:31:24,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 19:31:24,878 INFO L255 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-31 19:31:24,880 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 19:31:24,953 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 54 proven. 3 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-10-31 19:31:24,953 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 19:31:25,032 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 49 proven. 8 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-10-31 19:31:25,032 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 19:31:25,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [130646215] [2024-10-31 19:31:25,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [130646215] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 19:31:25,032 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 19:31:25,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2024-10-31 19:31:25,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752711687] [2024-10-31 19:31:25,032 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 19:31:25,033 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-31 19:31:25,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 19:31:25,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-31 19:31:25,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-10-31 19:31:25,033 INFO L87 Difference]: Start difference. First operand 498 states and 720 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) [2024-10-31 19:31:25,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 19:31:25,261 INFO L93 Difference]: Finished difference Result 1521 states and 2160 transitions. [2024-10-31 19:31:25,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-31 19:31:25,262 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 [2024-10-31 19:31:25,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 19:31:25,266 INFO L225 Difference]: With dead ends: 1521 [2024-10-31 19:31:25,266 INFO L226 Difference]: Without dead ends: 1051 [2024-10-31 19:31:25,266 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 [2024-10-31 19:31:25,267 INFO L432 NwaCegarLoop]: 79 mSDtfsCounter, 252 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 19:31:25,267 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [252 Valid, 298 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 19:31:25,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1051 states. [2024-10-31 19:31:25,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1051 to 677. [2024-10-31 19:31:25,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 677 states, 676 states have (on average 1.4585798816568047) internal successors, (986), 676 states have internal predecessors, (986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:31:25,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 677 states to 677 states and 986 transitions. [2024-10-31 19:31:25,296 INFO L78 Accepts]: Start accepts. Automaton has 677 states and 986 transitions. Word has length 70 [2024-10-31 19:31:25,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 19:31:25,296 INFO L471 AbstractCegarLoop]: Abstraction has 677 states and 986 transitions. [2024-10-31 19:31:25,296 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) [2024-10-31 19:31:25,296 INFO L276 IsEmpty]: Start isEmpty. Operand 677 states and 986 transitions. [2024-10-31 19:31:25,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-10-31 19:31:25,297 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 19:31:25,297 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] [2024-10-31 19:31:25,304 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2024-10-31 19:31:25,497 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-10-31 19:31:25,498 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 19:31:25,498 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 19:31:25,498 INFO L85 PathProgramCache]: Analyzing trace with hash 343661932, now seen corresponding path program 2 times [2024-10-31 19:31:25,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 19:31:25,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [872596245] [2024-10-31 19:31:25,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 19:31:25,499 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-10-31 19:31:25,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-10-31 19:31:25,501 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-10-31 19:31:25,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2024-10-31 19:31:25,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 19:31:25,576 INFO L255 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-31 19:31:25,578 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 19:31:25,688 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 66 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-31 19:31:25,688 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 19:31:25,743 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 68 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-31 19:31:25,743 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 19:31:25,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [872596245] [2024-10-31 19:31:25,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [872596245] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 19:31:25,743 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 19:31:25,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2024-10-31 19:31:25,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462340958] [2024-10-31 19:31:25,743 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 19:31:25,744 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-31 19:31:25,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 19:31:25,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-31 19:31:25,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-10-31 19:31:25,744 INFO L87 Difference]: Start difference. First operand 677 states and 986 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) [2024-10-31 19:31:25,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 19:31:25,946 INFO L93 Difference]: Finished difference Result 1536 states and 2146 transitions. [2024-10-31 19:31:25,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-31 19:31:25,947 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 [2024-10-31 19:31:25,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 19:31:25,949 INFO L225 Difference]: With dead ends: 1536 [2024-10-31 19:31:25,949 INFO L226 Difference]: Without dead ends: 887 [2024-10-31 19:31:25,950 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 [2024-10-31 19:31:25,951 INFO L432 NwaCegarLoop]: 86 mSDtfsCounter, 215 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 19:31:25,951 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [215 Valid, 304 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 19:31:25,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 887 states. [2024-10-31 19:31:25,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 887 to 569. [2024-10-31 19:31:25,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 569 states, 568 states have (on average 1.3873239436619718) internal successors, (788), 568 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:31:25,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 788 transitions. [2024-10-31 19:31:25,982 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 788 transitions. Word has length 70 [2024-10-31 19:31:25,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 19:31:25,982 INFO L471 AbstractCegarLoop]: Abstraction has 569 states and 788 transitions. [2024-10-31 19:31:25,982 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) [2024-10-31 19:31:25,982 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 788 transitions. [2024-10-31 19:31:25,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-10-31 19:31:25,983 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 19:31:25,983 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] [2024-10-31 19:31:25,986 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2024-10-31 19:31:26,185 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-10-31 19:31:26,185 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 19:31:26,186 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 19:31:26,186 INFO L85 PathProgramCache]: Analyzing trace with hash 484210542, now seen corresponding path program 3 times [2024-10-31 19:31:26,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 19:31:26,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [322606852] [2024-10-31 19:31:26,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 19:31:26,186 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-10-31 19:31:26,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-10-31 19:31:26,187 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-10-31 19:31:26,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2024-10-31 19:31:26,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 19:31:26,265 INFO L255 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-10-31 19:31:26,268 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 19:31:28,653 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 19:31:28,653 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 19:31:30,324 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 19:31:30,324 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 19:31:30,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [322606852] [2024-10-31 19:31:30,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [322606852] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 19:31:30,324 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 19:31:30,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 44 [2024-10-31 19:31:30,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033117610] [2024-10-31 19:31:30,325 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 19:31:30,325 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-10-31 19:31:30,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 19:31:30,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-10-31 19:31:30,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1750, Unknown=0, NotChecked=0, Total=1892 [2024-10-31 19:31:30,326 INFO L87 Difference]: Start difference. First operand 569 states and 788 transitions. Second operand has 44 states, 44 states have (on average 3.1363636363636362) internal successors, (138), 44 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) [2024-10-31 19:31:51,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 19:31:51,423 INFO L93 Difference]: Finished difference Result 1809 states and 2474 transitions. [2024-10-31 19:31:51,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2024-10-31 19:31:51,424 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 3.1363636363636362) internal successors, (138), 44 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 [2024-10-31 19:31:51,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 19:31:51,428 INFO L225 Difference]: With dead ends: 1809 [2024-10-31 19:31:51,428 INFO L226 Difference]: Without dead ends: 1700 [2024-10-31 19:31:51,437 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10676 ImplicationChecksByTransitivity, 16.7s TimeCoverageRelationStatistics Valid=5264, Invalid=31026, Unknown=0, NotChecked=0, Total=36290 [2024-10-31 19:31:51,438 INFO L432 NwaCegarLoop]: 106 mSDtfsCounter, 2143 mSDsluCounter, 2041 mSDsCounter, 0 mSdLazyCounter, 9679 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2143 SdHoareTripleChecker+Valid, 2147 SdHoareTripleChecker+Invalid, 9862 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 9679 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2024-10-31 19:31:51,438 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2143 Valid, 2147 Invalid, 9862 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 9679 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time] [2024-10-31 19:31:51,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1700 states. [2024-10-31 19:31:51,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1700 to 837. [2024-10-31 19:31:51,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 837 states, 836 states have (on average 1.395933014354067) internal successors, (1167), 836 states have internal predecessors, (1167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:31:51,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 837 states to 837 states and 1167 transitions. [2024-10-31 19:31:51,484 INFO L78 Accepts]: Start accepts. Automaton has 837 states and 1167 transitions. Word has length 70 [2024-10-31 19:31:51,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 19:31:51,484 INFO L471 AbstractCegarLoop]: Abstraction has 837 states and 1167 transitions. [2024-10-31 19:31:51,484 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 3.1363636363636362) internal successors, (138), 44 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) [2024-10-31 19:31:51,484 INFO L276 IsEmpty]: Start isEmpty. Operand 837 states and 1167 transitions. [2024-10-31 19:31:51,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-10-31 19:31:51,485 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 19:31:51,485 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] [2024-10-31 19:31:51,489 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (13)] Ended with exit code 0 [2024-10-31 19:31:51,687 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-10-31 19:31:51,688 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 19:31:51,688 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 19:31:51,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1135042114, now seen corresponding path program 1 times [2024-10-31 19:31:51,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 19:31:51,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2051867194] [2024-10-31 19:31:51,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 19:31:51,689 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-10-31 19:31:51,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-10-31 19:31:51,690 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-10-31 19:31:51,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2024-10-31 19:31:51,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 19:31:51,771 INFO L255 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-10-31 19:31:51,773 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 19:31:53,979 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 19:31:53,979 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 19:31:56,012 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 19:31:56,013 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 19:31:56,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2051867194] [2024-10-31 19:31:56,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [2051867194] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 19:31:56,013 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 19:31:56,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2024-10-31 19:31:56,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832399524] [2024-10-31 19:31:56,013 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 19:31:56,014 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-10-31 19:31:56,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 19:31:56,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-10-31 19:31:56,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1921, Unknown=0, NotChecked=0, Total=2070 [2024-10-31 19:31:56,015 INFO L87 Difference]: Start difference. First operand 837 states and 1167 transitions. Second operand has 46 states, 46 states have (on average 3.1739130434782608) internal successors, (146), 46 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) [2024-10-31 19:32:59,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 19:32:59,747 INFO L93 Difference]: Finished difference Result 3127 states and 4198 transitions. [2024-10-31 19:32:59,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 276 states. [2024-10-31 19:32:59,747 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 3.1739130434782608) internal successors, (146), 46 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 [2024-10-31 19:32:59,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 19:32:59,754 INFO L225 Difference]: With dead ends: 3127 [2024-10-31 19:32:59,755 INFO L226 Difference]: Without dead ends: 2978 [2024-10-31 19:32:59,764 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 418 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 316 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38372 ImplicationChecksByTransitivity, 55.1s TimeCoverageRelationStatistics Valid=12903, Invalid=87903, Unknown=0, NotChecked=0, Total=100806 [2024-10-31 19:32:59,765 INFO L432 NwaCegarLoop]: 232 mSDtfsCounter, 2325 mSDsluCounter, 5318 mSDsCounter, 0 mSdLazyCounter, 14545 mSolverCounterSat, 267 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2325 SdHoareTripleChecker+Valid, 5550 SdHoareTripleChecker+Invalid, 14812 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 267 IncrementalHoareTripleChecker+Valid, 14545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.2s IncrementalHoareTripleChecker+Time [2024-10-31 19:32:59,765 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2325 Valid, 5550 Invalid, 14812 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [267 Valid, 14545 Invalid, 0 Unknown, 0 Unchecked, 10.2s Time] [2024-10-31 19:32:59,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2978 states. [2024-10-31 19:32:59,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2978 to 1457. [2024-10-31 19:32:59,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1457 states, 1456 states have (on average 1.3846153846153846) internal successors, (2016), 1456 states have internal predecessors, (2016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:32:59,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1457 states to 1457 states and 2016 transitions. [2024-10-31 19:32:59,853 INFO L78 Accepts]: Start accepts. Automaton has 1457 states and 2016 transitions. Word has length 74 [2024-10-31 19:32:59,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 19:32:59,853 INFO L471 AbstractCegarLoop]: Abstraction has 1457 states and 2016 transitions. [2024-10-31 19:32:59,853 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 3.1739130434782608) internal successors, (146), 46 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) [2024-10-31 19:32:59,853 INFO L276 IsEmpty]: Start isEmpty. Operand 1457 states and 2016 transitions. [2024-10-31 19:32:59,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-10-31 19:32:59,855 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 19:32:59,855 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] [2024-10-31 19:32:59,869 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (14)] Ended with exit code 0 [2024-10-31 19:33:00,068 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-10-31 19:33:00,069 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 19:33:00,069 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 19:33:00,069 INFO L85 PathProgramCache]: Analyzing trace with hash -777616002, now seen corresponding path program 1 times [2024-10-31 19:33:00,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 19:33:00,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [651710394] [2024-10-31 19:33:00,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 19:33:00,070 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-10-31 19:33:00,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-10-31 19:33:00,071 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-10-31 19:33:00,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2024-10-31 19:33:00,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 19:33:00,141 INFO L255 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-10-31 19:33:00,143 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 19:33:02,432 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 19:33:02,432 INFO L311 TraceCheckSpWp]: Computing backward predicates...