/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/soft_float_2a.c.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.5-dev-b75d321-m [2024-11-03 02:03:36,486 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-03 02:03:36,546 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Bitvector.epf [2024-11-03 02:03:36,554 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-03 02:03:36,554 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-03 02:03:36,576 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-03 02:03:36,577 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-03 02:03:36,577 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-03 02:03:36,578 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-03 02:03:36,578 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-03 02:03:36,578 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-03 02:03:36,579 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-03 02:03:36,579 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-03 02:03:36,579 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-03 02:03:36,580 INFO L153 SettingsManager]: * Use SBE=true [2024-11-03 02:03:36,580 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-03 02:03:36,580 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-03 02:03:36,581 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-03 02:03:36,581 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-03 02:03:36,581 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-03 02:03:36,582 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-03 02:03:36,582 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-03 02:03:36,582 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-03 02:03:36,583 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-03 02:03:36,583 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-11-03 02:03:36,583 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-03 02:03:36,584 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-11-03 02:03:36,584 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-03 02:03:36,584 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-03 02:03:36,584 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-03 02:03:36,585 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-03 02:03:36,585 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-03 02:03:36,585 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-03 02:03:36,585 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-03 02:03:36,586 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-03 02:03:36,586 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-03 02:03:36,586 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-03 02:03:36,586 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-03 02:03:36,587 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2024-11-03 02:03:36,587 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-11-03 02:03:36,587 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-03 02:03:36,590 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-03 02:03:36,591 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-03 02:03:36,591 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-03 02:03:36,591 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Allow undefined functions -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Command for external solver -> cvc4 --incremental --print-success --lang smt [2024-11-03 02:03:36,818 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-03 02:03:36,840 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-03 02:03:36,844 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-03 02:03:36,845 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-03 02:03:36,845 INFO L274 PluginConnector]: CDTParser initialized [2024-11-03 02:03:36,846 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/soft_float_2a.c.cil.c [2024-11-03 02:03:38,285 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-03 02:03:38,469 INFO L384 CDTParser]: Found 1 translation units. [2024-11-03 02:03:38,469 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/bitvector/soft_float_2a.c.cil.c [2024-11-03 02:03:38,482 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f6392a373/42c5781100a64933a194d959b10d7fa1/FLAG27ba7e9e1 [2024-11-03 02:03:38,502 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f6392a373/42c5781100a64933a194d959b10d7fa1 [2024-11-03 02:03:38,506 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-03 02:03:38,507 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-11-03 02:03:38,510 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-03 02:03:38,510 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-03 02:03:38,515 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-03 02:03:38,516 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:03:38" (1/1) ... [2024-11-03 02:03:38,517 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43d13e3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:03:38, skipping insertion in model container [2024-11-03 02:03:38,517 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:03:38" (1/1) ... [2024-11-03 02:03:38,550 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-03 02:03:38,736 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/bitvector/soft_float_2a.c.cil.c[728,741] [2024-11-03 02:03:38,797 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-03 02:03:38,807 INFO L200 MainTranslator]: Completed pre-run [2024-11-03 02:03:38,816 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/bitvector/soft_float_2a.c.cil.c[728,741] [2024-11-03 02:03:38,840 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-03 02:03:38,855 INFO L204 MainTranslator]: Completed translation [2024-11-03 02:03:38,855 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:03:38 WrapperNode [2024-11-03 02:03:38,855 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-03 02:03:38,856 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-03 02:03:38,856 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-03 02:03:38,857 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-03 02:03:38,863 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:03:38" (1/1) ... [2024-11-03 02:03:38,870 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:03:38" (1/1) ... [2024-11-03 02:03:38,889 INFO L138 Inliner]: procedures = 17, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 113 [2024-11-03 02:03:38,889 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-03 02:03:38,890 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-03 02:03:38,890 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-03 02:03:38,890 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-03 02:03:38,901 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:03:38" (1/1) ... [2024-11-03 02:03:38,901 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:03:38" (1/1) ... [2024-11-03 02:03:38,904 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:03:38" (1/1) ... [2024-11-03 02:03:38,917 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-11-03 02:03:38,917 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:03:38" (1/1) ... [2024-11-03 02:03:38,918 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:03:38" (1/1) ... [2024-11-03 02:03:38,924 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:03:38" (1/1) ... [2024-11-03 02:03:38,930 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:03:38" (1/1) ... [2024-11-03 02:03:38,931 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:03:38" (1/1) ... [2024-11-03 02:03:38,933 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:03:38" (1/1) ... [2024-11-03 02:03:38,935 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-03 02:03:38,936 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-03 02:03:38,936 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-03 02:03:38,937 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-03 02:03:38,937 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:03:38" (1/1) ... [2024-11-03 02:03:38,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-03 02:03:38,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-03 02:03:38,975 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-03 02:03:38,977 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-03 02:03:38,997 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-03 02:03:38,997 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-11-03 02:03:38,997 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2024-11-03 02:03:38,997 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2024-11-03 02:03:38,997 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-03 02:03:38,998 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-03 02:03:38,998 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-03 02:03:38,998 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-03 02:03:39,067 INFO L238 CfgBuilder]: Building ICFG [2024-11-03 02:03:39,069 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-03 02:03:39,413 INFO L? ?]: Removed 44 outVars from TransFormulas that were not future-live. [2024-11-03 02:03:39,414 INFO L287 CfgBuilder]: Performing block encoding [2024-11-03 02:03:39,428 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-03 02:03:39,428 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-03 02:03:39,428 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:03:39 BoogieIcfgContainer [2024-11-03 02:03:39,429 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-03 02:03:39,431 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-03 02:03:39,431 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-03 02:03:39,434 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-03 02:03:39,435 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:03:38" (1/3) ... [2024-11-03 02:03:39,436 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@630e66a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:03:39, skipping insertion in model container [2024-11-03 02:03:39,436 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:03:38" (2/3) ... [2024-11-03 02:03:39,436 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@630e66a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:03:39, skipping insertion in model container [2024-11-03 02:03:39,436 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:03:39" (3/3) ... [2024-11-03 02:03:39,438 INFO L112 eAbstractionObserver]: Analyzing ICFG soft_float_2a.c.cil.c [2024-11-03 02:03:39,453 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-03 02:03:39,453 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-03 02:03:39,508 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-03 02:03:39,517 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;@5d5e463b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-03 02:03:39,518 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-03 02:03:39,523 INFO L276 IsEmpty]: Start isEmpty. Operand has 52 states, 43 states have (on average 1.558139534883721) internal successors, (67), 45 states have internal predecessors, (67), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-03 02:03:39,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-03 02:03:39,532 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 02:03:39,532 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-03 02:03:39,533 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 02:03:39,537 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 02:03:39,538 INFO L85 PathProgramCache]: Analyzing trace with hash 1428146956, now seen corresponding path program 1 times [2024-11-03 02:03:39,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 02:03:39,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [162313404] [2024-11-03 02:03:39,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 02:03:39,546 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-03 02:03:39,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-03 02:03:39,548 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) [2024-11-03 02:03:39,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (2)] Waiting until timeout for monitored process [2024-11-03 02:03:39,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 02:03:39,680 INFO L255 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-03 02:03:39,689 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 02:03:39,769 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-03 02:03:39,770 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 02:03:39,878 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-03 02:03:39,879 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 02:03:39,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [162313404] [2024-11-03 02:03:39,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [162313404] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-03 02:03:39,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-03 02:03:39,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2024-11-03 02:03:39,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220155494] [2024-11-03 02:03:39,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-03 02:03:39,887 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-03 02:03:39,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 02:03:39,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-03 02:03:39,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-03 02:03:39,914 INFO L87 Difference]: Start difference. First operand has 52 states, 43 states have (on average 1.558139534883721) internal successors, (67), 45 states have internal predecessors, (67), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-03 02:03:40,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-03 02:03:40,077 INFO L93 Difference]: Finished difference Result 115 states and 181 transitions. [2024-11-03 02:03:40,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-03 02:03:40,079 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 42 [2024-11-03 02:03:40,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-03 02:03:40,088 INFO L225 Difference]: With dead ends: 115 [2024-11-03 02:03:40,088 INFO L226 Difference]: Without dead ends: 60 [2024-11-03 02:03:40,092 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-11-03 02:03:40,097 INFO L432 NwaCegarLoop]: 60 mSDtfsCounter, 12 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-03 02:03:40,098 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 166 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-03 02:03:40,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-11-03 02:03:40,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 51. [2024-11-03 02:03:40,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 43 states have (on average 1.3953488372093024) internal successors, (60), 43 states have internal predecessors, (60), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-03 02:03:40,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 71 transitions. [2024-11-03 02:03:40,132 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 71 transitions. Word has length 42 [2024-11-03 02:03:40,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-03 02:03:40,133 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 71 transitions. [2024-11-03 02:03:40,133 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-03 02:03:40,133 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 71 transitions. [2024-11-03 02:03:40,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-03 02:03:40,135 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 02:03:40,136 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-03 02:03:40,138 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (2)] Forceful destruction successful, exit code 0 [2024-11-03 02:03:40,336 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 [2024-11-03 02:03:40,337 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 02:03:40,338 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 02:03:40,338 INFO L85 PathProgramCache]: Analyzing trace with hash -649725496, now seen corresponding path program 1 times [2024-11-03 02:03:40,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 02:03:40,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [758848442] [2024-11-03 02:03:40,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 02:03:40,339 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-03 02:03:40,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-03 02:03:40,341 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) [2024-11-03 02:03:40,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (3)] Waiting until timeout for monitored process [2024-11-03 02:03:40,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 02:03:40,429 INFO L255 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-03 02:03:40,431 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 02:03:40,466 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-03 02:03:40,492 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 02:03:40,545 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-03 02:03:40,546 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 02:03:40,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [758848442] [2024-11-03 02:03:40,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [758848442] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-03 02:03:40,546 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-03 02:03:40,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2024-11-03 02:03:40,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172575412] [2024-11-03 02:03:40,546 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-03 02:03:40,548 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-03 02:03:40,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 02:03:40,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-03 02:03:40,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-03 02:03:40,549 INFO L87 Difference]: Start difference. First operand 51 states and 71 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-03 02:03:40,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-03 02:03:40,562 INFO L93 Difference]: Finished difference Result 71 states and 99 transitions. [2024-11-03 02:03:40,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-03 02:03:40,563 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 45 [2024-11-03 02:03:40,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-03 02:03:40,565 INFO L225 Difference]: With dead ends: 71 [2024-11-03 02:03:40,565 INFO L226 Difference]: Without dead ends: 51 [2024-11-03 02:03:40,565 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-03 02:03:40,566 INFO L432 NwaCegarLoop]: 65 mSDtfsCounter, 26 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-03 02:03:40,567 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 126 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-03 02:03:40,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-11-03 02:03:40,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2024-11-03 02:03:40,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 43 states have (on average 1.372093023255814) internal successors, (59), 43 states have internal predecessors, (59), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-03 02:03:40,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 70 transitions. [2024-11-03 02:03:40,574 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 70 transitions. Word has length 45 [2024-11-03 02:03:40,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-03 02:03:40,574 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 70 transitions. [2024-11-03 02:03:40,574 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-03 02:03:40,575 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 70 transitions. [2024-11-03 02:03:40,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-03 02:03:40,577 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 02:03:40,577 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-03 02:03:40,580 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (3)] Forceful destruction successful, exit code 0 [2024-11-03 02:03:40,777 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 [2024-11-03 02:03:40,778 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 02:03:40,778 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 02:03:40,779 INFO L85 PathProgramCache]: Analyzing trace with hash 1923054242, now seen corresponding path program 1 times [2024-11-03 02:03:40,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 02:03:40,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [394525471] [2024-11-03 02:03:40,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 02:03:40,779 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-03 02:03:40,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-03 02:03:40,782 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) [2024-11-03 02:03:40,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2024-11-03 02:03:40,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 02:03:40,862 INFO L255 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-03 02:03:40,864 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 02:03:40,898 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-03 02:03:40,898 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 02:03:40,960 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-03 02:03:40,961 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 02:03:40,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [394525471] [2024-11-03 02:03:40,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [394525471] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-03 02:03:40,961 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-03 02:03:40,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2024-11-03 02:03:40,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496690138] [2024-11-03 02:03:40,962 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-03 02:03:40,962 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-03 02:03:40,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 02:03:40,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-03 02:03:40,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-03 02:03:40,963 INFO L87 Difference]: Start difference. First operand 51 states and 70 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-03 02:03:40,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-03 02:03:40,979 INFO L93 Difference]: Finished difference Result 72 states and 99 transitions. [2024-11-03 02:03:40,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-03 02:03:40,980 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 47 [2024-11-03 02:03:40,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-03 02:03:40,981 INFO L225 Difference]: With dead ends: 72 [2024-11-03 02:03:40,981 INFO L226 Difference]: Without dead ends: 51 [2024-11-03 02:03:40,982 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-03 02:03:40,983 INFO L432 NwaCegarLoop]: 63 mSDtfsCounter, 26 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-03 02:03:40,983 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 184 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-03 02:03:40,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-11-03 02:03:40,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2024-11-03 02:03:40,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 43 states have (on average 1.3488372093023255) internal successors, (58), 43 states have internal predecessors, (58), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-03 02:03:40,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 69 transitions. [2024-11-03 02:03:40,990 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 69 transitions. Word has length 47 [2024-11-03 02:03:40,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-03 02:03:40,990 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 69 transitions. [2024-11-03 02:03:40,990 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-03 02:03:40,990 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 69 transitions. [2024-11-03 02:03:40,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-03 02:03:40,992 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 02:03:40,992 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-03 02:03:40,994 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (4)] Ended with exit code 0 [2024-11-03 02:03:41,192 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 [2024-11-03 02:03:41,193 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 02:03:41,193 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 02:03:41,194 INFO L85 PathProgramCache]: Analyzing trace with hash 1336248228, now seen corresponding path program 1 times [2024-11-03 02:03:41,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 02:03:41,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [578502211] [2024-11-03 02:03:41,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 02:03:41,194 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-03 02:03:41,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-03 02:03:41,197 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) [2024-11-03 02:03:41,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2024-11-03 02:03:41,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 02:03:41,269 INFO L255 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-03 02:03:41,271 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 02:03:41,328 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-03 02:03:41,328 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 02:03:41,381 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-03 02:03:41,382 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 02:03:41,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [578502211] [2024-11-03 02:03:41,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [578502211] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-03 02:03:41,382 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-03 02:03:41,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 7 [2024-11-03 02:03:41,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076794757] [2024-11-03 02:03:41,383 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-03 02:03:41,383 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-03 02:03:41,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 02:03:41,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-03 02:03:41,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-03 02:03:41,384 INFO L87 Difference]: Start difference. First operand 51 states and 69 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-03 02:03:41,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-03 02:03:41,436 INFO L93 Difference]: Finished difference Result 79 states and 108 transitions. [2024-11-03 02:03:41,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-03 02:03:41,437 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 47 [2024-11-03 02:03:41,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-03 02:03:41,438 INFO L225 Difference]: With dead ends: 79 [2024-11-03 02:03:41,438 INFO L226 Difference]: Without dead ends: 61 [2024-11-03 02:03:41,439 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-03 02:03:41,440 INFO L432 NwaCegarLoop]: 58 mSDtfsCounter, 1 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-03 02:03:41,440 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 338 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-03 02:03:41,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2024-11-03 02:03:41,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2024-11-03 02:03:41,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 52 states have (on average 1.2884615384615385) internal successors, (67), 52 states have internal predecessors, (67), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2024-11-03 02:03:41,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 81 transitions. [2024-11-03 02:03:41,448 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 81 transitions. Word has length 47 [2024-11-03 02:03:41,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-03 02:03:41,448 INFO L471 AbstractCegarLoop]: Abstraction has 61 states and 81 transitions. [2024-11-03 02:03:41,449 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-03 02:03:41,449 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 81 transitions. [2024-11-03 02:03:41,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-03 02:03:41,450 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 02:03:41,450 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-03 02:03:41,453 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (5)] Ended with exit code 0 [2024-11-03 02:03:41,650 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 [2024-11-03 02:03:41,651 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 02:03:41,651 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 02:03:41,651 INFO L85 PathProgramCache]: Analyzing trace with hash 943221218, now seen corresponding path program 1 times [2024-11-03 02:03:41,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 02:03:41,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1106490072] [2024-11-03 02:03:41,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 02:03:41,652 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-03 02:03:41,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-03 02:03:41,655 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) [2024-11-03 02:03:41,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2024-11-03 02:03:41,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 02:03:41,720 INFO L255 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-03 02:03:41,722 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 02:03:41,798 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-03 02:03:41,798 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 02:03:41,870 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-03 02:03:41,870 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 02:03:41,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1106490072] [2024-11-03 02:03:41,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1106490072] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-03 02:03:41,871 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-03 02:03:41,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2024-11-03 02:03:41,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629812885] [2024-11-03 02:03:41,871 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-03 02:03:41,872 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-03 02:03:41,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 02:03:41,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-03 02:03:41,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-03 02:03:41,873 INFO L87 Difference]: Start difference. First operand 61 states and 81 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-03 02:03:41,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-03 02:03:41,926 INFO L93 Difference]: Finished difference Result 66 states and 85 transitions. [2024-11-03 02:03:41,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-03 02:03:41,931 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 47 [2024-11-03 02:03:41,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-03 02:03:41,932 INFO L225 Difference]: With dead ends: 66 [2024-11-03 02:03:41,932 INFO L226 Difference]: Without dead ends: 61 [2024-11-03 02:03:41,933 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-03 02:03:41,933 INFO L432 NwaCegarLoop]: 55 mSDtfsCounter, 14 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-03 02:03:41,934 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 241 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-03 02:03:41,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2024-11-03 02:03:41,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2024-11-03 02:03:41,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 52 states have (on average 1.2692307692307692) internal successors, (66), 52 states have internal predecessors, (66), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2024-11-03 02:03:41,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 80 transitions. [2024-11-03 02:03:41,944 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 80 transitions. Word has length 47 [2024-11-03 02:03:41,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-03 02:03:41,945 INFO L471 AbstractCegarLoop]: Abstraction has 61 states and 80 transitions. [2024-11-03 02:03:41,945 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-03 02:03:41,945 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 80 transitions. [2024-11-03 02:03:41,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-03 02:03:41,946 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 02:03:41,946 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-03 02:03:41,952 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (6)] Ended with exit code 0 [2024-11-03 02:03:42,148 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 [2024-11-03 02:03:42,149 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 02:03:42,149 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 02:03:42,150 INFO L85 PathProgramCache]: Analyzing trace with hash 1018978088, now seen corresponding path program 1 times [2024-11-03 02:03:42,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 02:03:42,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [366703894] [2024-11-03 02:03:42,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 02:03:42,150 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-03 02:03:42,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-03 02:03:42,151 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) [2024-11-03 02:03:42,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2024-11-03 02:03:42,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 02:03:42,224 INFO L255 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-03 02:03:42,226 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 02:03:42,255 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-03 02:03:42,256 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 02:03:42,284 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-03 02:03:42,285 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 02:03:42,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [366703894] [2024-11-03 02:03:42,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [366703894] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-03 02:03:42,285 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-03 02:03:42,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2024-11-03 02:03:42,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808007012] [2024-11-03 02:03:42,286 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-03 02:03:42,286 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-03 02:03:42,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 02:03:42,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-03 02:03:42,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-03 02:03:42,287 INFO L87 Difference]: Start difference. First operand 61 states and 80 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-03 02:03:42,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-03 02:03:42,321 INFO L93 Difference]: Finished difference Result 72 states and 91 transitions. [2024-11-03 02:03:42,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-03 02:03:42,321 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 49 [2024-11-03 02:03:42,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-03 02:03:42,322 INFO L225 Difference]: With dead ends: 72 [2024-11-03 02:03:42,322 INFO L226 Difference]: Without dead ends: 66 [2024-11-03 02:03:42,323 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-03 02:03:42,323 INFO L432 NwaCegarLoop]: 58 mSDtfsCounter, 0 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-03 02:03:42,324 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 222 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-03 02:03:42,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-11-03 02:03:42,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2024-11-03 02:03:42,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 57 states have (on average 1.2456140350877194) internal successors, (71), 57 states have internal predecessors, (71), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2024-11-03 02:03:42,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 85 transitions. [2024-11-03 02:03:42,331 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 85 transitions. Word has length 49 [2024-11-03 02:03:42,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-03 02:03:42,331 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 85 transitions. [2024-11-03 02:03:42,332 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-03 02:03:42,332 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 85 transitions. [2024-11-03 02:03:42,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-03 02:03:42,333 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 02:03:42,333 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-03 02:03:42,336 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (7)] Ended with exit code 0 [2024-11-03 02:03:42,535 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 [2024-11-03 02:03:42,536 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 02:03:42,536 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 02:03:42,536 INFO L85 PathProgramCache]: Analyzing trace with hash 1076236390, now seen corresponding path program 1 times [2024-11-03 02:03:42,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 02:03:42,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2114192456] [2024-11-03 02:03:42,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 02:03:42,537 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-03 02:03:42,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-03 02:03:42,538 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) [2024-11-03 02:03:42,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2024-11-03 02:03:42,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 02:03:42,622 INFO L255 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-03 02:03:42,623 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 02:03:42,661 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-03 02:03:42,662 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 02:03:42,752 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-03 02:03:42,752 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 02:03:42,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2114192456] [2024-11-03 02:03:42,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [2114192456] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-03 02:03:42,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-03 02:03:42,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2024-11-03 02:03:42,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213810227] [2024-11-03 02:03:42,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-03 02:03:42,754 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-03 02:03:42,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 02:03:42,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-03 02:03:42,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-03 02:03:42,754 INFO L87 Difference]: Start difference. First operand 66 states and 85 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-03 02:03:42,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-03 02:03:42,820 INFO L93 Difference]: Finished difference Result 134 states and 174 transitions. [2024-11-03 02:03:42,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-03 02:03:42,821 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 49 [2024-11-03 02:03:42,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-03 02:03:42,822 INFO L225 Difference]: With dead ends: 134 [2024-11-03 02:03:42,822 INFO L226 Difference]: Without dead ends: 75 [2024-11-03 02:03:42,823 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-03 02:03:42,824 INFO L432 NwaCegarLoop]: 56 mSDtfsCounter, 7 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-03 02:03:42,824 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 151 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-03 02:03:42,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2024-11-03 02:03:42,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 71. [2024-11-03 02:03:42,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 61 states have (on average 1.2459016393442623) internal successors, (76), 62 states have internal predecessors, (76), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2024-11-03 02:03:42,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 92 transitions. [2024-11-03 02:03:42,841 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 92 transitions. Word has length 49 [2024-11-03 02:03:42,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-03 02:03:42,841 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 92 transitions. [2024-11-03 02:03:42,841 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-03 02:03:42,841 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 92 transitions. [2024-11-03 02:03:42,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-03 02:03:42,842 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 02:03:42,843 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-03 02:03:42,847 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2024-11-03 02:03:43,043 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 [2024-11-03 02:03:43,044 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 02:03:43,044 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 02:03:43,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1394183649, now seen corresponding path program 1 times [2024-11-03 02:03:43,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 02:03:43,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [120332061] [2024-11-03 02:03:43,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 02:03:43,045 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-03 02:03:43,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-03 02:03:43,047 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) [2024-11-03 02:03:43,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2024-11-03 02:03:43,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 02:03:43,112 INFO L255 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-03 02:03:43,114 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 02:03:43,142 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-03 02:03:43,143 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 02:03:43,212 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-03 02:03:43,213 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 02:03:43,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [120332061] [2024-11-03 02:03:43,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [120332061] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-03 02:03:43,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-03 02:03:43,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2024-11-03 02:03:43,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482802038] [2024-11-03 02:03:43,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-03 02:03:43,214 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-03 02:03:43,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 02:03:43,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-03 02:03:43,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-03 02:03:43,215 INFO L87 Difference]: Start difference. First operand 71 states and 92 transitions. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-03 02:03:43,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-03 02:03:43,292 INFO L93 Difference]: Finished difference Result 146 states and 191 transitions. [2024-11-03 02:03:43,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-03 02:03:43,293 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), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 50 [2024-11-03 02:03:43,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-03 02:03:43,294 INFO L225 Difference]: With dead ends: 146 [2024-11-03 02:03:43,294 INFO L226 Difference]: Without dead ends: 82 [2024-11-03 02:03:43,294 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-11-03 02:03:43,295 INFO L432 NwaCegarLoop]: 59 mSDtfsCounter, 16 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-03 02:03:43,295 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 156 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-03 02:03:43,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2024-11-03 02:03:43,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 75. [2024-11-03 02:03:43,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 64 states have (on average 1.234375) internal successors, (79), 66 states have internal predecessors, (79), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2024-11-03 02:03:43,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 97 transitions. [2024-11-03 02:03:43,306 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 97 transitions. Word has length 50 [2024-11-03 02:03:43,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-03 02:03:43,306 INFO L471 AbstractCegarLoop]: Abstraction has 75 states and 97 transitions. [2024-11-03 02:03:43,306 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), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-03 02:03:43,307 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 97 transitions. [2024-11-03 02:03:43,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-11-03 02:03:43,307 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 02:03:43,307 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-03 02:03:43,310 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (9)] Ended with exit code 0 [2024-11-03 02:03:43,509 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 [2024-11-03 02:03:43,510 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 02:03:43,510 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 02:03:43,510 INFO L85 PathProgramCache]: Analyzing trace with hash -525834617, now seen corresponding path program 1 times [2024-11-03 02:03:43,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 02:03:43,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1655480897] [2024-11-03 02:03:43,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 02:03:43,510 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-03 02:03:43,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-03 02:03:43,512 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) [2024-11-03 02:03:43,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2024-11-03 02:03:43,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 02:03:43,602 INFO L255 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-03 02:03:43,604 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 02:03:43,649 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-03 02:03:43,649 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 02:03:43,784 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-03 02:03:43,785 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 02:03:43,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1655480897] [2024-11-03 02:03:43,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1655480897] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-03 02:03:43,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-03 02:03:43,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2024-11-03 02:03:43,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116033736] [2024-11-03 02:03:43,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-03 02:03:43,786 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-03 02:03:43,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 02:03:43,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-03 02:03:43,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-11-03 02:03:43,787 INFO L87 Difference]: Start difference. First operand 75 states and 97 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-03 02:03:43,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-03 02:03:43,921 INFO L93 Difference]: Finished difference Result 160 states and 210 transitions. [2024-11-03 02:03:43,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-03 02:03:43,922 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 51 [2024-11-03 02:03:43,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-03 02:03:43,923 INFO L225 Difference]: With dead ends: 160 [2024-11-03 02:03:43,923 INFO L226 Difference]: Without dead ends: 92 [2024-11-03 02:03:43,924 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2024-11-03 02:03:43,924 INFO L432 NwaCegarLoop]: 58 mSDtfsCounter, 14 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-03 02:03:43,925 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 208 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-03 02:03:43,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2024-11-03 02:03:43,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 76. [2024-11-03 02:03:43,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 65 states have (on average 1.2461538461538462) internal successors, (81), 67 states have internal predecessors, (81), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2024-11-03 02:03:43,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 99 transitions. [2024-11-03 02:03:43,942 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 99 transitions. Word has length 51 [2024-11-03 02:03:43,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-03 02:03:43,942 INFO L471 AbstractCegarLoop]: Abstraction has 76 states and 99 transitions. [2024-11-03 02:03:43,943 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-03 02:03:43,943 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 99 transitions. [2024-11-03 02:03:43,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-11-03 02:03:43,943 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 02:03:43,944 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-03 02:03:43,948 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (10)] Ended with exit code 0 [2024-11-03 02:03:44,144 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 [2024-11-03 02:03:44,144 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 02:03:44,145 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 02:03:44,145 INFO L85 PathProgramCache]: Analyzing trace with hash 108655932, now seen corresponding path program 1 times [2024-11-03 02:03:44,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 02:03:44,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1325876904] [2024-11-03 02:03:44,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 02:03:44,145 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-03 02:03:44,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-03 02:03:44,146 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) [2024-11-03 02:03:44,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2024-11-03 02:03:44,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 02:03:44,236 INFO L255 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-03 02:03:44,238 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 02:03:44,288 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-03 02:03:44,288 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 02:03:44,423 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-03 02:03:44,424 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 02:03:44,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1325876904] [2024-11-03 02:03:44,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1325876904] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-03 02:03:44,424 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-03 02:03:44,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2024-11-03 02:03:44,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332180800] [2024-11-03 02:03:44,424 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-03 02:03:44,425 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-03 02:03:44,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 02:03:44,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-03 02:03:44,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-11-03 02:03:44,426 INFO L87 Difference]: Start difference. First operand 76 states and 99 transitions. Second operand has 8 states, 8 states have (on average 6.125) internal successors, (49), 8 states have internal predecessors, (49), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-03 02:03:44,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-03 02:03:44,580 INFO L93 Difference]: Finished difference Result 169 states and 224 transitions. [2024-11-03 02:03:44,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-03 02:03:44,583 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 8 states have internal predecessors, (49), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 52 [2024-11-03 02:03:44,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-03 02:03:44,584 INFO L225 Difference]: With dead ends: 169 [2024-11-03 02:03:44,584 INFO L226 Difference]: Without dead ends: 100 [2024-11-03 02:03:44,585 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2024-11-03 02:03:44,586 INFO L432 NwaCegarLoop]: 59 mSDtfsCounter, 26 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-03 02:03:44,589 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 197 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-03 02:03:44,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2024-11-03 02:03:44,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 84. [2024-11-03 02:03:44,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 73 states have (on average 1.2876712328767124) internal successors, (94), 75 states have internal predecessors, (94), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2024-11-03 02:03:44,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 112 transitions. [2024-11-03 02:03:44,603 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 112 transitions. Word has length 52 [2024-11-03 02:03:44,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-03 02:03:44,603 INFO L471 AbstractCegarLoop]: Abstraction has 84 states and 112 transitions. [2024-11-03 02:03:44,604 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 8 states have internal predecessors, (49), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-03 02:03:44,604 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 112 transitions. [2024-11-03 02:03:44,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-03 02:03:44,605 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 02:03:44,605 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-03 02:03:44,608 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2024-11-03 02:03:44,805 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 [2024-11-03 02:03:44,806 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 02:03:44,806 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 02:03:44,806 INFO L85 PathProgramCache]: Analyzing trace with hash 1637248477, now seen corresponding path program 1 times [2024-11-03 02:03:44,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 02:03:44,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [761056065] [2024-11-03 02:03:44,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 02:03:44,806 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-03 02:03:44,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-03 02:03:44,810 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) [2024-11-03 02:03:44,811 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2024-11-03 02:03:44,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 02:03:44,902 INFO L255 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-03 02:03:44,904 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 02:03:44,960 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 24 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-03 02:03:44,960 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 02:03:45,092 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-03 02:03:45,092 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 02:03:45,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [761056065] [2024-11-03 02:03:45,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [761056065] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-03 02:03:45,093 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-03 02:03:45,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2024-11-03 02:03:45,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543892842] [2024-11-03 02:03:45,093 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-03 02:03:45,093 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-03 02:03:45,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 02:03:45,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-03 02:03:45,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-11-03 02:03:45,094 INFO L87 Difference]: Start difference. First operand 84 states and 112 transitions. Second operand has 10 states, 10 states have (on average 5.3) internal successors, (53), 10 states have internal predecessors, (53), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-03 02:03:45,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-03 02:03:45,370 INFO L93 Difference]: Finished difference Result 193 states and 261 transitions. [2024-11-03 02:03:45,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-03 02:03:45,370 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 10 states have internal predecessors, (53), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 54 [2024-11-03 02:03:45,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-03 02:03:45,371 INFO L225 Difference]: With dead ends: 193 [2024-11-03 02:03:45,371 INFO L226 Difference]: Without dead ends: 116 [2024-11-03 02:03:45,372 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=129, Unknown=0, NotChecked=0, Total=210 [2024-11-03 02:03:45,373 INFO L432 NwaCegarLoop]: 60 mSDtfsCounter, 89 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-03 02:03:45,373 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 254 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-03 02:03:45,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2024-11-03 02:03:45,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 88. [2024-11-03 02:03:45,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 77 states have (on average 1.3116883116883118) internal successors, (101), 79 states have internal predecessors, (101), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2024-11-03 02:03:45,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 119 transitions. [2024-11-03 02:03:45,383 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 119 transitions. Word has length 54 [2024-11-03 02:03:45,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-03 02:03:45,383 INFO L471 AbstractCegarLoop]: Abstraction has 88 states and 119 transitions. [2024-11-03 02:03:45,383 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 10 states have internal predecessors, (53), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-03 02:03:45,383 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 119 transitions. [2024-11-03 02:03:45,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-11-03 02:03:45,384 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 02:03:45,384 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-03 02:03:45,388 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2024-11-03 02:03:45,584 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 [2024-11-03 02:03:45,585 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 02:03:45,585 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 02:03:45,585 INFO L85 PathProgramCache]: Analyzing trace with hash -1446219546, now seen corresponding path program 2 times [2024-11-03 02:03:45,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 02:03:45,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1162245741] [2024-11-03 02:03:45,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 02:03:45,586 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-03 02:03:45,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-03 02:03:45,587 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) [2024-11-03 02:03:45,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2024-11-03 02:03:45,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 02:03:45,673 INFO L255 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-03 02:03:45,674 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 02:03:45,787 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 24 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-03 02:03:45,787 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 02:03:46,048 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 4 proven. 34 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-03 02:03:46,049 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 02:03:46,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1162245741] [2024-11-03 02:03:46,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1162245741] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-03 02:03:46,049 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-03 02:03:46,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2024-11-03 02:03:46,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073505607] [2024-11-03 02:03:46,049 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-03 02:03:46,050 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-03 02:03:46,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 02:03:46,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-03 02:03:46,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2024-11-03 02:03:46,051 INFO L87 Difference]: Start difference. First operand 88 states and 119 transitions. Second operand has 14 states, 14 states have (on average 4.785714285714286) internal successors, (67), 14 states have internal predecessors, (67), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-03 02:03:46,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-03 02:03:46,564 INFO L93 Difference]: Finished difference Result 204 states and 279 transitions. [2024-11-03 02:03:46,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-03 02:03:46,565 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.785714285714286) internal successors, (67), 14 states have internal predecessors, (67), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 61 [2024-11-03 02:03:46,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-03 02:03:46,566 INFO L225 Difference]: With dead ends: 204 [2024-11-03 02:03:46,566 INFO L226 Difference]: Without dead ends: 123 [2024-11-03 02:03:46,567 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=117, Invalid=189, Unknown=0, NotChecked=0, Total=306 [2024-11-03 02:03:46,567 INFO L432 NwaCegarLoop]: 68 mSDtfsCounter, 79 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 435 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-03 02:03:46,568 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 435 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-03 02:03:46,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2024-11-03 02:03:46,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 102. [2024-11-03 02:03:46,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 91 states have (on average 1.3626373626373627) internal successors, (124), 93 states have internal predecessors, (124), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2024-11-03 02:03:46,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 142 transitions. [2024-11-03 02:03:46,588 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 142 transitions. Word has length 61 [2024-11-03 02:03:46,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-03 02:03:46,589 INFO L471 AbstractCegarLoop]: Abstraction has 102 states and 142 transitions. [2024-11-03 02:03:46,590 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.785714285714286) internal successors, (67), 14 states have internal predecessors, (67), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-03 02:03:46,590 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 142 transitions. [2024-11-03 02:03:46,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-11-03 02:03:46,592 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 02:03:46,592 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-03 02:03:46,595 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (13)] Ended with exit code 0 [2024-11-03 02:03:46,792 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 [2024-11-03 02:03:46,793 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 02:03:46,793 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 02:03:46,793 INFO L85 PathProgramCache]: Analyzing trace with hash -1151836835, now seen corresponding path program 2 times [2024-11-03 02:03:46,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 02:03:46,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1987870770] [2024-11-03 02:03:46,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 02:03:46,794 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-03 02:03:46,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-03 02:03:46,795 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) [2024-11-03 02:03:46,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2024-11-03 02:03:46,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 02:03:46,890 INFO L255 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-03 02:03:46,892 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 02:03:47,033 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 24 proven. 45 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-03 02:03:47,033 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 02:03:47,388 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 4 proven. 53 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-03 02:03:47,388 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 02:03:47,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1987870770] [2024-11-03 02:03:47,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1987870770] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-03 02:03:47,388 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-03 02:03:47,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2024-11-03 02:03:47,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460840396] [2024-11-03 02:03:47,388 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-03 02:03:47,389 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-03 02:03:47,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 02:03:47,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-03 02:03:47,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2024-11-03 02:03:47,390 INFO L87 Difference]: Start difference. First operand 102 states and 142 transitions. Second operand has 18 states, 18 states have (on average 4.277777777777778) internal successors, (77), 18 states have internal predecessors, (77), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-03 02:03:48,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-03 02:03:48,293 INFO L93 Difference]: Finished difference Result 263 states and 369 transitions. [2024-11-03 02:03:48,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-03 02:03:48,294 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.277777777777778) internal successors, (77), 18 states have internal predecessors, (77), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 66 [2024-11-03 02:03:48,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-03 02:03:48,295 INFO L225 Difference]: With dead ends: 263 [2024-11-03 02:03:48,296 INFO L226 Difference]: Without dead ends: 168 [2024-11-03 02:03:48,296 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=325, Invalid=605, Unknown=0, NotChecked=0, Total=930 [2024-11-03 02:03:48,297 INFO L432 NwaCegarLoop]: 76 mSDtfsCounter, 205 mSDsluCounter, 534 mSDsCounter, 0 mSdLazyCounter, 515 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 610 SdHoareTripleChecker+Invalid, 524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-03 02:03:48,297 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 610 Invalid, 524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 515 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-03 02:03:48,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2024-11-03 02:03:48,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 112. [2024-11-03 02:03:48,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 101 states have (on average 1.396039603960396) internal successors, (141), 103 states have internal predecessors, (141), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2024-11-03 02:03:48,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 159 transitions. [2024-11-03 02:03:48,310 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 159 transitions. Word has length 66 [2024-11-03 02:03:48,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-03 02:03:48,311 INFO L471 AbstractCegarLoop]: Abstraction has 112 states and 159 transitions. [2024-11-03 02:03:48,311 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.277777777777778) internal successors, (77), 18 states have internal predecessors, (77), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-03 02:03:48,311 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 159 transitions. [2024-11-03 02:03:48,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-11-03 02:03:48,312 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 02:03:48,312 INFO L215 NwaCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-03 02:03:48,315 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (14)] Ended with exit code 0 [2024-11-03 02:03:48,512 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 [2024-11-03 02:03:48,513 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 02:03:48,513 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 02:03:48,513 INFO L85 PathProgramCache]: Analyzing trace with hash -943187546, now seen corresponding path program 3 times [2024-11-03 02:03:48,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 02:03:48,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [476536519] [2024-11-03 02:03:48,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 02:03:48,513 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-03 02:03:48,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-03 02:03:48,515 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) [2024-11-03 02:03:48,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2024-11-03 02:03:48,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 02:03:48,615 INFO L255 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-03 02:03:48,617 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 02:03:48,894 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 24 proven. 155 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-03 02:03:48,894 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 02:03:49,673 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 4 proven. 163 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-03 02:03:49,673 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 02:03:49,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [476536519] [2024-11-03 02:03:49,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [476536519] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-03 02:03:49,673 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-03 02:03:49,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2024-11-03 02:03:49,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028549630] [2024-11-03 02:03:49,674 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-03 02:03:49,674 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-03 02:03:49,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 02:03:49,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-03 02:03:49,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=457, Unknown=0, NotChecked=0, Total=650 [2024-11-03 02:03:49,675 INFO L87 Difference]: Start difference. First operand 112 states and 159 transitions. Second operand has 26 states, 26 states have (on average 3.9615384615384617) internal successors, (103), 26 states have internal predecessors, (103), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-03 02:03:51,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-03 02:03:51,440 INFO L93 Difference]: Finished difference Result 276 states and 391 transitions. [2024-11-03 02:03:51,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-03 02:03:51,441 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.9615384615384617) internal successors, (103), 26 states have internal predecessors, (103), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 79 [2024-11-03 02:03:51,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-03 02:03:51,442 INFO L225 Difference]: With dead ends: 276 [2024-11-03 02:03:51,442 INFO L226 Difference]: Without dead ends: 171 [2024-11-03 02:03:51,443 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=453, Invalid=807, Unknown=0, NotChecked=0, Total=1260 [2024-11-03 02:03:51,444 INFO L432 NwaCegarLoop]: 86 mSDtfsCounter, 216 mSDsluCounter, 991 mSDsCounter, 0 mSdLazyCounter, 618 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 1077 SdHoareTripleChecker+Invalid, 653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 618 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-03 02:03:51,444 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [216 Valid, 1077 Invalid, 653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 618 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-03 02:03:51,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2024-11-03 02:03:51,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 138. [2024-11-03 02:03:51,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 127 states have (on average 1.4488188976377954) internal successors, (184), 129 states have internal predecessors, (184), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2024-11-03 02:03:51,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 202 transitions. [2024-11-03 02:03:51,454 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 202 transitions. Word has length 79 [2024-11-03 02:03:51,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-03 02:03:51,454 INFO L471 AbstractCegarLoop]: Abstraction has 138 states and 202 transitions. [2024-11-03 02:03:51,455 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.9615384615384617) internal successors, (103), 26 states have internal predecessors, (103), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-03 02:03:51,455 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 202 transitions. [2024-11-03 02:03:51,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2024-11-03 02:03:51,456 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 02:03:51,456 INFO L215 NwaCegarLoop]: trace histogram [14, 14, 13, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-03 02:03:51,459 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2024-11-03 02:03:51,656 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-03 02:03:51,656 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 02:03:51,657 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 02:03:51,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1493533603, now seen corresponding path program 3 times [2024-11-03 02:03:51,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 02:03:51,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1478592862] [2024-11-03 02:03:51,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 02:03:51,657 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-03 02:03:51,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-03 02:03:51,660 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-03 02:03:51,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2024-11-03 02:03:51,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 02:03:51,784 INFO L255 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-03 02:03:51,785 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 02:03:52,062 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 24 proven. 273 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-03 02:03:52,062 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 02:03:52,783 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 4 proven. 281 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-03 02:03:52,783 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 02:03:52,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1478592862] [2024-11-03 02:03:52,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1478592862] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-03 02:03:52,784 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-03 02:03:52,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2024-11-03 02:03:52,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104728931] [2024-11-03 02:03:52,784 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-03 02:03:52,784 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-03 02:03:52,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 02:03:52,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-03 02:03:52,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2024-11-03 02:03:52,786 INFO L87 Difference]: Start difference. First operand 138 states and 202 transitions. Second operand has 34 states, 34 states have (on average 3.676470588235294) internal successors, (125), 34 states have internal predecessors, (125), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-03 02:03:54,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-03 02:03:54,708 INFO L93 Difference]: Finished difference Result 367 states and 525 transitions. [2024-11-03 02:03:54,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2024-11-03 02:03:54,709 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.676470588235294) internal successors, (125), 34 states have internal predecessors, (125), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 90 [2024-11-03 02:03:54,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-03 02:03:54,710 INFO L225 Difference]: With dead ends: 367 [2024-11-03 02:03:54,710 INFO L226 Difference]: Without dead ends: 236 [2024-11-03 02:03:54,712 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=936, Invalid=2256, Unknown=0, NotChecked=0, Total=3192 [2024-11-03 02:03:54,712 INFO L432 NwaCegarLoop]: 108 mSDtfsCounter, 764 mSDsluCounter, 1414 mSDsCounter, 0 mSdLazyCounter, 1689 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 764 SdHoareTripleChecker+Valid, 1522 SdHoareTripleChecker+Invalid, 1737 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-03 02:03:54,713 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [764 Valid, 1522 Invalid, 1737 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1689 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-03 02:03:54,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2024-11-03 02:03:54,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 142. [2024-11-03 02:03:54,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 131 states have (on average 1.4580152671755726) internal successors, (191), 133 states have internal predecessors, (191), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2024-11-03 02:03:54,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 209 transitions. [2024-11-03 02:03:54,739 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 209 transitions. Word has length 90 [2024-11-03 02:03:54,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-03 02:03:54,740 INFO L471 AbstractCegarLoop]: Abstraction has 142 states and 209 transitions. [2024-11-03 02:03:54,740 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.676470588235294) internal successors, (125), 34 states have internal predecessors, (125), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-03 02:03:54,740 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 209 transitions. [2024-11-03 02:03:54,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2024-11-03 02:03:54,741 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 02:03:54,741 INFO L215 NwaCegarLoop]: trace histogram [23, 22, 22, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-03 02:03:54,745 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (16)] Ended with exit code 0 [2024-11-03 02:03:54,941 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-03 02:03:54,942 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 02:03:54,942 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 02:03:54,942 INFO L85 PathProgramCache]: Analyzing trace with hash 1780046630, now seen corresponding path program 4 times [2024-11-03 02:03:54,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 02:03:54,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1400404261] [2024-11-03 02:03:54,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 02:03:54,943 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-03 02:03:54,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-03 02:03:54,944 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-03 02:03:54,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2024-11-03 02:03:55,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 02:03:55,088 INFO L255 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-03 02:03:55,089 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 02:03:55,653 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 24 proven. 737 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-03 02:03:55,654 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 02:03:57,723 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 4 proven. 745 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-03 02:03:57,723 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 02:03:57,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1400404261] [2024-11-03 02:03:57,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1400404261] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-03 02:03:57,724 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-03 02:03:57,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2024-11-03 02:03:57,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759722097] [2024-11-03 02:03:57,724 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-03 02:03:57,724 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-11-03 02:03:57,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 02:03:57,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-11-03 02:03:57,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=673, Invalid=1777, Unknown=0, NotChecked=0, Total=2450 [2024-11-03 02:03:57,726 INFO L87 Difference]: Start difference. First operand 142 states and 209 transitions. Second operand has 50 states, 50 states have (on average 3.5) internal successors, (175), 50 states have internal predecessors, (175), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-03 02:04:06,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-03 02:04:06,122 INFO L93 Difference]: Finished difference Result 402 states and 585 transitions. [2024-11-03 02:04:06,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2024-11-03 02:04:06,124 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.5) internal successors, (175), 50 states have internal predecessors, (175), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 115 [2024-11-03 02:04:06,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-03 02:04:06,126 INFO L225 Difference]: With dead ends: 402 [2024-11-03 02:04:06,126 INFO L226 Difference]: Without dead ends: 267 [2024-11-03 02:04:06,128 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=1773, Invalid=3339, Unknown=0, NotChecked=0, Total=5112 [2024-11-03 02:04:06,129 INFO L432 NwaCegarLoop]: 122 mSDtfsCounter, 748 mSDsluCounter, 2887 mSDsCounter, 0 mSdLazyCounter, 2106 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 748 SdHoareTripleChecker+Valid, 3009 SdHoareTripleChecker+Invalid, 2175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 2106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-11-03 02:04:06,129 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [748 Valid, 3009 Invalid, 2175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 2106 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2024-11-03 02:04:06,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2024-11-03 02:04:06,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 210. [2024-11-03 02:04:06,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 199 states have (on average 1.5276381909547738) internal successors, (304), 201 states have internal predecessors, (304), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2024-11-03 02:04:06,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 322 transitions. [2024-11-03 02:04:06,145 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 322 transitions. Word has length 115 [2024-11-03 02:04:06,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-03 02:04:06,145 INFO L471 AbstractCegarLoop]: Abstraction has 210 states and 322 transitions. [2024-11-03 02:04:06,146 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.5) internal successors, (175), 50 states have internal predecessors, (175), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-03 02:04:06,146 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 322 transitions. [2024-11-03 02:04:06,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2024-11-03 02:04:06,147 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 02:04:06,147 INFO L215 NwaCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-03 02:04:06,152 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (17)] Ended with exit code 0 [2024-11-03 02:04:06,347 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-03 02:04:06,348 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 02:04:06,348 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 02:04:06,348 INFO L85 PathProgramCache]: Analyzing trace with hash 96721693, now seen corresponding path program 4 times [2024-11-03 02:04:06,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 02:04:06,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1533817333] [2024-11-03 02:04:06,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 02:04:06,349 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-03 02:04:06,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-03 02:04:06,352 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-03 02:04:06,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2024-11-03 02:04:06,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 02:04:06,526 INFO L255 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-03 02:04:06,528 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 02:04:06,551 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 858 trivial. 0 not checked. [2024-11-03 02:04:06,551 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 02:04:06,594 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 858 trivial. 0 not checked. [2024-11-03 02:04:06,594 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 02:04:06,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1533817333] [2024-11-03 02:04:06,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1533817333] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-03 02:04:06,595 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-03 02:04:06,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2024-11-03 02:04:06,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18969226] [2024-11-03 02:04:06,595 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-03 02:04:06,595 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-03 02:04:06,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 02:04:06,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-03 02:04:06,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-03 02:04:06,596 INFO L87 Difference]: Start difference. First operand 210 states and 322 transitions. Second operand has 8 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-03 02:04:06,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-03 02:04:06,628 INFO L93 Difference]: Finished difference Result 216 states and 327 transitions. [2024-11-03 02:04:06,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-03 02:04:06,628 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 120 [2024-11-03 02:04:06,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-03 02:04:06,630 INFO L225 Difference]: With dead ends: 216 [2024-11-03 02:04:06,630 INFO L226 Difference]: Without dead ends: 198 [2024-11-03 02:04:06,631 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-11-03 02:04:06,631 INFO L432 NwaCegarLoop]: 60 mSDtfsCounter, 2 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-03 02:04:06,631 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 294 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-03 02:04:06,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2024-11-03 02:04:06,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 198. [2024-11-03 02:04:06,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 187 states have (on average 1.5454545454545454) internal successors, (289), 190 states have internal predecessors, (289), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2024-11-03 02:04:06,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 304 transitions. [2024-11-03 02:04:06,649 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 304 transitions. Word has length 120 [2024-11-03 02:04:06,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-03 02:04:06,650 INFO L471 AbstractCegarLoop]: Abstraction has 198 states and 304 transitions. [2024-11-03 02:04:06,650 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-03 02:04:06,650 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 304 transitions. [2024-11-03 02:04:06,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2024-11-03 02:04:06,651 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 02:04:06,652 INFO L215 NwaCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-03 02:04:06,656 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (18)] Ended with exit code 0 [2024-11-03 02:04:06,852 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-03 02:04:06,853 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 02:04:06,853 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 02:04:06,853 INFO L85 PathProgramCache]: Analyzing trace with hash 38983873, now seen corresponding path program 1 times [2024-11-03 02:04:06,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 02:04:06,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1614545004] [2024-11-03 02:04:06,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 02:04:06,853 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-03 02:04:06,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-03 02:04:06,854 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-03 02:04:06,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2024-11-03 02:04:06,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 02:04:06,934 INFO L255 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-03 02:04:06,936 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 02:04:06,986 INFO L134 CoverageAnalysis]: Checked inductivity of 860 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 851 trivial. 0 not checked. [2024-11-03 02:04:06,986 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 02:04:07,024 INFO L134 CoverageAnalysis]: Checked inductivity of 860 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 851 trivial. 0 not checked. [2024-11-03 02:04:07,024 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 02:04:07,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1614545004] [2024-11-03 02:04:07,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1614545004] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-03 02:04:07,024 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-03 02:04:07,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2024-11-03 02:04:07,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383411969] [2024-11-03 02:04:07,024 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-03 02:04:07,025 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-03 02:04:07,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 02:04:07,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-03 02:04:07,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-11-03 02:04:07,025 INFO L87 Difference]: Start difference. First operand 198 states and 304 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-03 02:04:07,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-03 02:04:07,077 INFO L93 Difference]: Finished difference Result 225 states and 337 transitions. [2024-11-03 02:04:07,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-03 02:04:07,078 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 125 [2024-11-03 02:04:07,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-03 02:04:07,079 INFO L225 Difference]: With dead ends: 225 [2024-11-03 02:04:07,080 INFO L226 Difference]: Without dead ends: 195 [2024-11-03 02:04:07,080 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-11-03 02:04:07,081 INFO L432 NwaCegarLoop]: 53 mSDtfsCounter, 1 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-03 02:04:07,081 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 360 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-03 02:04:07,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2024-11-03 02:04:07,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2024-11-03 02:04:07,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 185 states have (on average 1.3027027027027027) internal successors, (241), 187 states have internal predecessors, (241), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2024-11-03 02:04:07,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 253 transitions. [2024-11-03 02:04:07,097 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 253 transitions. Word has length 125 [2024-11-03 02:04:07,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-03 02:04:07,097 INFO L471 AbstractCegarLoop]: Abstraction has 195 states and 253 transitions. [2024-11-03 02:04:07,097 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-03 02:04:07,097 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 253 transitions. [2024-11-03 02:04:07,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2024-11-03 02:04:07,099 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 02:04:07,099 INFO L215 NwaCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-03 02:04:07,101 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (19)] Ended with exit code 0 [2024-11-03 02:04:07,299 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-03 02:04:07,300 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 02:04:07,300 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 02:04:07,300 INFO L85 PathProgramCache]: Analyzing trace with hash 147310070, now seen corresponding path program 2 times [2024-11-03 02:04:07,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 02:04:07,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1625770421] [2024-11-03 02:04:07,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 02:04:07,300 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-03 02:04:07,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-03 02:04:07,303 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-03 02:04:07,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2024-11-03 02:04:07,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 02:04:07,411 INFO L255 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-03 02:04:07,413 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 02:04:07,500 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 857 trivial. 0 not checked. [2024-11-03 02:04:07,500 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 02:04:07,587 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 857 trivial. 0 not checked. [2024-11-03 02:04:07,587 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 02:04:07,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1625770421] [2024-11-03 02:04:07,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1625770421] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-03 02:04:07,588 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-03 02:04:07,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2024-11-03 02:04:07,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112517183] [2024-11-03 02:04:07,588 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-03 02:04:07,588 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-03 02:04:07,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 02:04:07,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-03 02:04:07,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-11-03 02:04:07,589 INFO L87 Difference]: Start difference. First operand 195 states and 253 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-03 02:04:07,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-03 02:04:07,688 INFO L93 Difference]: Finished difference Result 196 states and 254 transitions. [2024-11-03 02:04:07,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-03 02:04:07,688 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 129 [2024-11-03 02:04:07,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-03 02:04:07,689 INFO L225 Difference]: With dead ends: 196 [2024-11-03 02:04:07,689 INFO L226 Difference]: Without dead ends: 0 [2024-11-03 02:04:07,690 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 247 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-11-03 02:04:07,691 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 6 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-03 02:04:07,691 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 237 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-03 02:04:07,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-11-03 02:04:07,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-11-03 02:04:07,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-03 02:04:07,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-11-03 02:04:07,692 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 129 [2024-11-03 02:04:07,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-03 02:04:07,692 INFO L471 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-11-03 02:04:07,692 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-03 02:04:07,692 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-11-03 02:04:07,692 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-11-03 02:04:07,695 INFO L782 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-11-03 02:04:07,699 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (20)] Ended with exit code 0 [2024-11-03 02:04:07,896 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-03 02:04:07,898 INFO L407 BasicCegarLoop]: Path program histogram: [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-03 02:04:07,900 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-11-03 02:04:08,733 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2024-11-03 02:04:08,755 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.11 02:04:08 BoogieIcfgContainer [2024-11-03 02:04:08,755 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-11-03 02:04:08,756 INFO L158 Benchmark]: Toolchain (without parser) took 30248.73ms. Allocated memory was 325.1MB in the beginning and 390.1MB in the end (delta: 65.0MB). Free memory was 270.7MB in the beginning and 347.2MB in the end (delta: -76.5MB). Peak memory consumption was 208.2MB. Max. memory is 8.0GB. [2024-11-03 02:04:08,756 INFO L158 Benchmark]: CDTParser took 0.50ms. Allocated memory is still 203.4MB. Free memory is still 156.4MB. There was no memory consumed. Max. memory is 8.0GB. [2024-11-03 02:04:08,756 INFO L158 Benchmark]: CACSL2BoogieTranslator took 345.68ms. Allocated memory is still 325.1MB. Free memory was 270.7MB in the beginning and 254.9MB in the end (delta: 15.7MB). Peak memory consumption was 15.7MB. Max. memory is 8.0GB. [2024-11-03 02:04:08,756 INFO L158 Benchmark]: Boogie Procedure Inliner took 33.13ms. Allocated memory is still 325.1MB. Free memory was 254.9MB in the beginning and 253.4MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2024-11-03 02:04:08,757 INFO L158 Benchmark]: Boogie Preprocessor took 45.12ms. Allocated memory is still 325.1MB. Free memory was 253.4MB in the beginning and 251.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2024-11-03 02:04:08,757 INFO L158 Benchmark]: RCFGBuilder took 492.54ms. Allocated memory is still 325.1MB. Free memory was 250.7MB in the beginning and 232.9MB in the end (delta: 17.8MB). Peak memory consumption was 17.8MB. Max. memory is 8.0GB. [2024-11-03 02:04:08,757 INFO L158 Benchmark]: TraceAbstraction took 29324.44ms. Allocated memory was 325.1MB in the beginning and 390.1MB in the end (delta: 65.0MB). Free memory was 232.4MB in the beginning and 347.2MB in the end (delta: -114.8MB). Peak memory consumption was 170.4MB. Max. memory is 8.0GB. [2024-11-03 02:04:08,758 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.50ms. Allocated memory is still 203.4MB. Free memory is still 156.4MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 345.68ms. Allocated memory is still 325.1MB. Free memory was 270.7MB in the beginning and 254.9MB in the end (delta: 15.7MB). Peak memory consumption was 15.7MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 33.13ms. Allocated memory is still 325.1MB. Free memory was 254.9MB in the beginning and 253.4MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 45.12ms. Allocated memory is still 325.1MB. Free memory was 253.4MB in the beginning and 251.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 492.54ms. Allocated memory is still 325.1MB. Free memory was 250.7MB in the beginning and 232.9MB in the end (delta: 17.8MB). Peak memory consumption was 17.8MB. Max. memory is 8.0GB. * TraceAbstraction took 29324.44ms. Allocated memory was 325.1MB in the beginning and 390.1MB in the end (delta: 65.0MB). Free memory was 232.4MB in the beginning and 347.2MB in the end (delta: -114.8MB). Peak memory consumption was 170.4MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 17]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 52 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 28.4s, OverallIterations: 19, TraceHistogramMax: 24, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 14.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2252 SdHoareTripleChecker+Valid, 5.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2252 mSDsluCounter, 9787 SdHoareTripleChecker+Invalid, 4.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 8531 mSDsCounter, 212 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 5820 IncrementalHoareTripleChecker+Invalid, 6032 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 212 mSolverCounterUnsat, 1256 mSDtfsCounter, 5820 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2705 GetRequests, 2415 SyntacticMatches, 2 SemanticMatches, 288 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 857 ImplicationChecksByTransitivity, 13.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=210occurred in iteration=16, InterpolantAutomatonStates: 249, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 19 MinimizatonAttempts, 341 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 7.5s InterpolantComputationTime, 1318 NumberOfCodeBlocks, 1318 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 2598 ConstructedInterpolants, 0 QuantifiedInterpolants, 7376 SizeOfPredicates, 13 NumberOfNonLiveVariables, 2360 ConjunctsInSsa, 142 ConjunctsInUnsatCore, 38 InterpolantComputations, 14 PerfectInterpolantSequences, 5998/8610 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 37]: Loop Invariant Derived loop invariant: ((0 != \old(m)) && ((1 != \old(m)) || (m < 16777216))) - InvariantResult [Line: 57]: Loop Invariant Derived loop invariant: ((((0 != \old(e)) || !(((e + -22) % 4294967296) <= -128)) && ((0 != \old(e)) || !(e <= -128))) && !(\old(m) < 16777216)) - ProcedureContractResult [Line: 24]: Procedure Contract for base2flt Derived contract for procedure base2flt. Ensures: ((0 != m) || (0 == \result)) - ProcedureContractResult [Line: 15]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert. Requires: (1 == cond) Ensures: (1 == cond) RESULT: Ultimate proved your program to be correct! [2024-11-03 02:04:08,788 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request...