/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/floats-esbmc-regression/round_nondet.i -------------------------------------------------------------------------------- This is Ultimate 0.2.5-dev-b75d321-m [2024-11-03 02:24:12,838 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-03 02:24:12,915 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 02:24:12,921 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-03 02:24:12,921 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-03 02:24:12,948 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-03 02:24:12,948 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-03 02:24:12,949 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-03 02:24:12,950 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-03 02:24:12,950 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-03 02:24:12,951 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-03 02:24:12,951 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-03 02:24:12,951 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-03 02:24:12,952 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-03 02:24:12,952 INFO L153 SettingsManager]: * Use SBE=true [2024-11-03 02:24:12,952 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-03 02:24:12,953 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-03 02:24:12,953 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-03 02:24:12,953 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-03 02:24:12,953 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-03 02:24:12,954 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-03 02:24:12,957 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-03 02:24:12,957 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-03 02:24:12,958 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-03 02:24:12,958 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-11-03 02:24:12,958 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-03 02:24:12,958 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-11-03 02:24:12,958 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-03 02:24:12,959 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-03 02:24:12,959 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-03 02:24:12,959 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-03 02:24:12,959 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-03 02:24:12,960 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-03 02:24:12,960 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-03 02:24:12,962 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-03 02:24:12,962 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-03 02:24:12,962 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-03 02:24:12,962 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-03 02:24:12,963 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2024-11-03 02:24:12,963 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-11-03 02:24:12,963 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-03 02:24:12,964 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-03 02:24:12,964 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-03 02:24:12,964 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-03 02:24:12,964 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Allow undefined functions -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Command for external solver -> cvc4 --incremental --print-success --lang smt [2024-11-03 02:24:13,184 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-03 02:24:13,205 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-03 02:24:13,208 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-03 02:24:13,209 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-03 02:24:13,209 INFO L274 PluginConnector]: CDTParser initialized [2024-11-03 02:24:13,210 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/floats-esbmc-regression/round_nondet.i [2024-11-03 02:24:14,519 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-03 02:24:14,746 INFO L384 CDTParser]: Found 1 translation units. [2024-11-03 02:24:14,746 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/floats-esbmc-regression/round_nondet.i [2024-11-03 02:24:14,758 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/863a84d07/334b6f8fe3e24acebafa51a1b3cb906d/FLAG3cc9d021a [2024-11-03 02:24:14,774 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/863a84d07/334b6f8fe3e24acebafa51a1b3cb906d [2024-11-03 02:24:14,776 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-03 02:24:14,777 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-11-03 02:24:14,780 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-03 02:24:14,780 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-03 02:24:14,785 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-03 02:24:14,785 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:24:14" (1/1) ... [2024-11-03 02:24:14,786 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a9e0d53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:24:14, skipping insertion in model container [2024-11-03 02:24:14,786 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:24:14" (1/1) ... [2024-11-03 02:24:14,828 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-03 02:24:15,200 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/floats-esbmc-regression/round_nondet.i[38163,38176] [2024-11-03 02:24:15,215 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-03 02:24:15,227 INFO L200 MainTranslator]: Completed pre-run [2024-11-03 02:24:15,263 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/floats-esbmc-regression/round_nondet.i[38163,38176] [2024-11-03 02:24:15,269 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-03 02:24:15,393 INFO L204 MainTranslator]: Completed translation [2024-11-03 02:24:15,394 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:24:15 WrapperNode [2024-11-03 02:24:15,394 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-03 02:24:15,395 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-03 02:24:15,395 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-03 02:24:15,396 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-03 02:24:15,401 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:24:15" (1/1) ... [2024-11-03 02:24:15,418 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:24:15" (1/1) ... [2024-11-03 02:24:15,435 INFO L138 Inliner]: procedures = 461, calls = 15, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 33 [2024-11-03 02:24:15,435 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-03 02:24:15,436 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-03 02:24:15,436 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-03 02:24:15,436 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-03 02:24:15,444 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:24:15" (1/1) ... [2024-11-03 02:24:15,444 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:24:15" (1/1) ... [2024-11-03 02:24:15,447 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:24:15" (1/1) ... [2024-11-03 02:24:15,455 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 02:24:15,455 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:24:15" (1/1) ... [2024-11-03 02:24:15,456 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:24:15" (1/1) ... [2024-11-03 02:24:15,461 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:24:15" (1/1) ... [2024-11-03 02:24:15,462 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:24:15" (1/1) ... [2024-11-03 02:24:15,464 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:24:15" (1/1) ... [2024-11-03 02:24:15,465 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:24:15" (1/1) ... [2024-11-03 02:24:15,471 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-03 02:24:15,472 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-03 02:24:15,472 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-03 02:24:15,472 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-03 02:24:15,473 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:24:15" (1/1) ... [2024-11-03 02:24:15,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-03 02:24:15,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-03 02:24:15,502 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 02:24:15,508 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 02:24:15,528 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-11-03 02:24:15,528 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-03 02:24:15,528 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-03 02:24:15,528 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-03 02:24:15,529 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-03 02:24:15,530 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-03 02:24:15,530 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-03 02:24:15,530 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-03 02:24:15,530 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.setCurrentRoundingMode [2024-11-03 02:24:15,531 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.setCurrentRoundingMode [2024-11-03 02:24:15,628 INFO L238 CfgBuilder]: Building ICFG [2024-11-03 02:24:15,630 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-03 02:24:15,742 INFO L? ?]: Removed 7 outVars from TransFormulas that were not future-live. [2024-11-03 02:24:15,742 INFO L287 CfgBuilder]: Performing block encoding [2024-11-03 02:24:15,754 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-03 02:24:15,754 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-03 02:24:15,754 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:24:15 BoogieIcfgContainer [2024-11-03 02:24:15,754 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-03 02:24:15,756 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-03 02:24:15,756 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-03 02:24:15,758 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-03 02:24:15,758 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:24:14" (1/3) ... [2024-11-03 02:24:15,759 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ca79b66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:24:15, skipping insertion in model container [2024-11-03 02:24:15,759 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:24:15" (2/3) ... [2024-11-03 02:24:15,759 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ca79b66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:24:15, skipping insertion in model container [2024-11-03 02:24:15,759 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:24:15" (3/3) ... [2024-11-03 02:24:15,760 INFO L112 eAbstractionObserver]: Analyzing ICFG round_nondet.i [2024-11-03 02:24:15,771 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-03 02:24:15,771 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-03 02:24:15,813 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-03 02:24:15,820 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;@6a1de91d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-03 02:24:15,821 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-03 02:24:15,826 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 22 states have internal predecessors, (28), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-03 02:24:15,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-03 02:24:15,833 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 02:24:15,833 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-03 02:24:15,834 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 02:24:15,837 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 02:24:15,837 INFO L85 PathProgramCache]: Analyzing trace with hash -1502520411, now seen corresponding path program 1 times [2024-11-03 02:24:15,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 02:24:15,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [104585839] [2024-11-03 02:24:15,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 02:24:15,845 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-03 02:24:15,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-03 02:24:15,847 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 02:24:15,851 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 02:24:15,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 02:24:15,956 INFO L255 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 1 conjuncts are in the unsatisfiable core [2024-11-03 02:24:15,960 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 02:24:15,970 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-03 02:24:15,970 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 02:24:15,998 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-03 02:24:15,999 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 02:24:15,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [104585839] [2024-11-03 02:24:16,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [104585839] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-03 02:24:16,000 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-03 02:24:16,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2024-11-03 02:24:16,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271557054] [2024-11-03 02:24:16,002 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-03 02:24:16,005 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-03 02:24:16,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 02:24:16,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-03 02:24:16,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-03 02:24:16,027 INFO L87 Difference]: Start difference. First operand has 35 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 22 states have internal predecessors, (28), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 2 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-03 02:24:16,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-03 02:24:16,051 INFO L93 Difference]: Finished difference Result 67 states and 95 transitions. [2024-11-03 02:24:16,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-03 02:24:16,054 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 27 [2024-11-03 02:24:16,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-03 02:24:16,062 INFO L225 Difference]: With dead ends: 67 [2024-11-03 02:24:16,062 INFO L226 Difference]: Without dead ends: 32 [2024-11-03 02:24:16,066 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-03 02:24:16,069 INFO L432 NwaCegarLoop]: 44 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-03 02:24:16,071 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-03 02:24:16,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-11-03 02:24:16,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2024-11-03 02:24:16,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 19 states have (on average 1.263157894736842) internal successors, (24), 20 states have internal predecessors, (24), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-03 02:24:16,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2024-11-03 02:24:16,105 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 27 [2024-11-03 02:24:16,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-03 02:24:16,105 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2024-11-03 02:24:16,105 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-03 02:24:16,105 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2024-11-03 02:24:16,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-03 02:24:16,107 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 02:24:16,108 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-03 02:24:16,111 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 02:24:16,308 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 02:24:16,309 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 02:24:16,309 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 02:24:16,310 INFO L85 PathProgramCache]: Analyzing trace with hash -1007136155, now seen corresponding path program 1 times [2024-11-03 02:24:16,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 02:24:16,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1458881700] [2024-11-03 02:24:16,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 02:24:16,310 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-03 02:24:16,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-03 02:24:16,311 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 02:24:16,312 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 02:24:16,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 02:24:16,432 INFO L255 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-03 02:24:16,434 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 02:24:16,697 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-03 02:24:16,698 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 02:24:16,781 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-03 02:24:16,781 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 02:24:16,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1458881700] [2024-11-03 02:24:16,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1458881700] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-03 02:24:16,781 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-03 02:24:16,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 6 [2024-11-03 02:24:16,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334765999] [2024-11-03 02:24:16,782 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-03 02:24:16,784 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-03 02:24:16,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 02:24:16,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-03 02:24:16,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-03 02:24:16,786 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 5 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-03 02:24:17,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-03 02:24:17,042 INFO L93 Difference]: Finished difference Result 81 states and 100 transitions. [2024-11-03 02:24:17,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-03 02:24:17,046 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 5 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 27 [2024-11-03 02:24:17,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-03 02:24:17,047 INFO L225 Difference]: With dead ends: 81 [2024-11-03 02:24:17,047 INFO L226 Difference]: Without dead ends: 55 [2024-11-03 02:24:17,048 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-11-03 02:24:17,049 INFO L432 NwaCegarLoop]: 42 mSDtfsCounter, 25 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-03 02:24:17,049 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 134 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-03 02:24:17,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-11-03 02:24:17,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 53. [2024-11-03 02:24:17,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 33 states have internal predecessors, (37), 14 states have call successors, (14), 6 states have call predecessors, (14), 7 states have return successors, (13), 13 states have call predecessors, (13), 12 states have call successors, (13) [2024-11-03 02:24:17,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 64 transitions. [2024-11-03 02:24:17,061 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 64 transitions. Word has length 27 [2024-11-03 02:24:17,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-03 02:24:17,062 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 64 transitions. [2024-11-03 02:24:17,062 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 5 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-03 02:24:17,062 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 64 transitions. [2024-11-03 02:24:17,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-03 02:24:17,063 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 02:24:17,063 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-03 02:24:17,067 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (3)] Ended with exit code 0 [2024-11-03 02:24:17,263 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 02:24:17,264 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 02:24:17,264 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 02:24:17,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1139151692, now seen corresponding path program 1 times [2024-11-03 02:24:17,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 02:24:17,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1537449568] [2024-11-03 02:24:17,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 02:24:17,265 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-03 02:24:17,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-03 02:24:17,267 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 02:24:17,268 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 02:24:17,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 02:24:17,368 INFO L255 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-03 02:24:17,370 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 02:24:17,505 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-03 02:24:17,505 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 02:24:17,578 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-03 02:24:17,578 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 02:24:17,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1537449568] [2024-11-03 02:24:17,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1537449568] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-03 02:24:17,578 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-03 02:24:17,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2024-11-03 02:24:17,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948366857] [2024-11-03 02:24:17,579 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-03 02:24:17,579 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-03 02:24:17,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 02:24:17,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-03 02:24:17,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-03 02:24:17,580 INFO L87 Difference]: Start difference. First operand 53 states and 64 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 5 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-03 02:24:17,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-03 02:24:17,967 INFO L93 Difference]: Finished difference Result 79 states and 90 transitions. [2024-11-03 02:24:17,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-03 02:24:17,968 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 5 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 28 [2024-11-03 02:24:17,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-03 02:24:17,969 INFO L225 Difference]: With dead ends: 79 [2024-11-03 02:24:17,969 INFO L226 Difference]: Without dead ends: 59 [2024-11-03 02:24:17,970 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-11-03 02:24:17,971 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 31 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-03 02:24:17,971 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 143 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-03 02:24:17,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-11-03 02:24:17,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 39. [2024-11-03 02:24:17,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 25 states have internal predecessors, (28), 9 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-03 02:24:17,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2024-11-03 02:24:17,979 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 28 [2024-11-03 02:24:17,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-03 02:24:17,979 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2024-11-03 02:24:17,979 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 5 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-03 02:24:17,979 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2024-11-03 02:24:17,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-03 02:24:17,982 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 02:24:17,982 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-03 02:24:17,986 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 02:24:18,182 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 02:24:18,183 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 02:24:18,183 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 02:24:18,184 INFO L85 PathProgramCache]: Analyzing trace with hash -812548960, now seen corresponding path program 1 times [2024-11-03 02:24:18,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 02:24:18,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1131723802] [2024-11-03 02:24:18,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 02:24:18,184 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-03 02:24:18,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-03 02:24:18,187 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 02:24:18,190 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 02:24:18,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 02:24:18,301 INFO L255 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-03 02:24:18,303 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 02:24:18,422 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-03 02:24:18,422 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 02:24:18,473 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-03 02:24:18,473 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 02:24:18,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1131723802] [2024-11-03 02:24:18,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1131723802] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-03 02:24:18,476 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-03 02:24:18,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 6 [2024-11-03 02:24:18,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849006375] [2024-11-03 02:24:18,477 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-03 02:24:18,477 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-03 02:24:18,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 02:24:18,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-03 02:24:18,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-03 02:24:18,478 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 5 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-03 02:24:18,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-03 02:24:18,551 INFO L93 Difference]: Finished difference Result 59 states and 67 transitions. [2024-11-03 02:24:18,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-03 02:24:18,552 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 5 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 29 [2024-11-03 02:24:18,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-03 02:24:18,552 INFO L225 Difference]: With dead ends: 59 [2024-11-03 02:24:18,553 INFO L226 Difference]: Without dead ends: 39 [2024-11-03 02:24:18,553 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-11-03 02:24:18,554 INFO L432 NwaCegarLoop]: 40 mSDtfsCounter, 7 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-03 02:24:18,554 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 129 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-03 02:24:18,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-11-03 02:24:18,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2024-11-03 02:24:18,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 24 states have (on average 1.125) internal successors, (27), 25 states have internal predecessors, (27), 9 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-03 02:24:18,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2024-11-03 02:24:18,561 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 29 [2024-11-03 02:24:18,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-03 02:24:18,561 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2024-11-03 02:24:18,561 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 5 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-03 02:24:18,562 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2024-11-03 02:24:18,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-03 02:24:18,563 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 02:24:18,563 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-03 02:24:18,566 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2024-11-03 02:24:18,763 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 02:24:18,764 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 02:24:18,764 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 02:24:18,764 INFO L85 PathProgramCache]: Analyzing trace with hash 846318223, now seen corresponding path program 1 times [2024-11-03 02:24:18,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 02:24:18,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2098600801] [2024-11-03 02:24:18,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 02:24:18,765 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-03 02:24:18,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-03 02:24:18,767 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 02:24:18,768 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 02:24:18,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 02:24:18,862 INFO L255 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-03 02:24:18,863 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 02:24:18,965 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-03 02:24:18,966 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 02:24:19,020 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-03 02:24:19,021 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 02:24:19,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2098600801] [2024-11-03 02:24:19,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [2098600801] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-03 02:24:19,021 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-03 02:24:19,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 6 [2024-11-03 02:24:19,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140017087] [2024-11-03 02:24:19,022 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-03 02:24:19,022 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-03 02:24:19,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 02:24:19,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-03 02:24:19,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-03 02:24:19,023 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 5 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-03 02:24:19,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-03 02:24:19,091 INFO L93 Difference]: Finished difference Result 59 states and 66 transitions. [2024-11-03 02:24:19,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-03 02:24:19,091 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 5 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 30 [2024-11-03 02:24:19,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-03 02:24:19,092 INFO L225 Difference]: With dead ends: 59 [2024-11-03 02:24:19,092 INFO L226 Difference]: Without dead ends: 39 [2024-11-03 02:24:19,092 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-11-03 02:24:19,093 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 7 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-03 02:24:19,093 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 127 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-03 02:24:19,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-11-03 02:24:19,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2024-11-03 02:24:19,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 25 states have internal predecessors, (26), 9 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-03 02:24:19,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2024-11-03 02:24:19,100 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 30 [2024-11-03 02:24:19,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-03 02:24:19,100 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2024-11-03 02:24:19,101 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 5 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-03 02:24:19,101 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2024-11-03 02:24:19,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-03 02:24:19,103 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 02:24:19,103 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-03 02:24:19,107 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 02:24:19,303 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 02:24:19,304 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 02:24:19,304 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 02:24:19,304 INFO L85 PathProgramCache]: Analyzing trace with hash 36971597, now seen corresponding path program 1 times [2024-11-03 02:24:19,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 02:24:19,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1782641767] [2024-11-03 02:24:19,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 02:24:19,305 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-03 02:24:19,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-03 02:24:19,306 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 02:24:19,307 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 02:24:19,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-03 02:24:19,409 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-03 02:24:19,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat