/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --cacsl2boogietranslator.allow.undefined.functions true --traceabstraction.smt.solver External_ModelsAndUnsatCoreMode --traceabstraction.command.for.external.solver 'z3 -smt2 -in SMTLIB2_COMPLIANT=true' -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Bitvector.epf -i ../../../trunk/examples/svcomp/hardware-verification-bv/btor2c-lazyMod.h_Vsa16.c -------------------------------------------------------------------------------- This is Ultimate 0.2.5-dev-b75d321-m [2024-11-04 16:24:40,758 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-04 16:24:40,824 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Bitvector.epf [2024-11-04 16:24:40,829 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-04 16:24:40,829 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-04 16:24:40,854 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-04 16:24:40,854 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-04 16:24:40,854 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-04 16:24:40,855 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-04 16:24:40,856 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-04 16:24:40,856 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-04 16:24:40,857 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-04 16:24:40,857 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-04 16:24:40,859 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-04 16:24:40,859 INFO L153 SettingsManager]: * Use SBE=true [2024-11-04 16:24:40,860 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-04 16:24:40,860 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-04 16:24:40,860 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-04 16:24:40,860 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-04 16:24:40,860 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-04 16:24:40,861 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-04 16:24:40,862 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-04 16:24:40,862 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-11-04 16:24:40,862 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-04 16:24:40,862 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-11-04 16:24:40,862 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-04 16:24:40,863 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-04 16:24:40,863 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-04 16:24:40,863 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-04 16:24:40,863 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-04 16:24:40,863 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-04 16:24:40,864 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-04 16:24:40,864 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-04 16:24:40,864 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-04 16:24:40,864 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-04 16:24:40,864 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2024-11-04 16:24:40,864 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-11-04 16:24:40,865 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-04 16:24:40,865 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-04 16:24:40,865 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-04 16:24:40,865 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-04 16:24:40,866 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Allow undefined functions -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Command for external solver -> z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-04 16:24:41,049 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-04 16:24:41,073 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-04 16:24:41,077 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-04 16:24:41,077 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-04 16:24:41,078 INFO L274 PluginConnector]: CDTParser initialized [2024-11-04 16:24:41,079 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/hardware-verification-bv/btor2c-lazyMod.h_Vsa16.c [2024-11-04 16:24:42,387 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-04 16:24:42,677 INFO L384 CDTParser]: Found 1 translation units. [2024-11-04 16:24:42,678 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/hardware-verification-bv/btor2c-lazyMod.h_Vsa16.c [2024-11-04 16:24:42,704 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cd43b5be5/d9339f15ab234a3db8954683b164a8cb/FLAG2704155f4 [2024-11-04 16:24:42,978 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cd43b5be5/d9339f15ab234a3db8954683b164a8cb [2024-11-04 16:24:42,980 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-04 16:24:42,981 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-11-04 16:24:42,982 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-04 16:24:42,982 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-04 16:24:42,986 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-04 16:24:42,987 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.11 04:24:42" (1/1) ... [2024-11-04 16:24:42,988 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b947891 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 04:24:42, skipping insertion in model container [2024-11-04 16:24:42,988 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.11 04:24:42" (1/1) ... [2024-11-04 16:24:43,036 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-04 16:24:43,189 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/hardware-verification-bv/btor2c-lazyMod.h_Vsa16.c[1247,1260] [2024-11-04 16:24:43,475 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-04 16:24:43,500 INFO L200 MainTranslator]: Completed pre-run [2024-11-04 16:24:43,509 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/hardware-verification-bv/btor2c-lazyMod.h_Vsa16.c[1247,1260] [2024-11-04 16:24:43,641 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-04 16:24:43,652 INFO L204 MainTranslator]: Completed translation [2024-11-04 16:24:43,653 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 04:24:43 WrapperNode [2024-11-04 16:24:43,653 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-04 16:24:43,654 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-04 16:24:43,654 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-04 16:24:43,654 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-04 16:24:43,658 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 04:24:43" (1/1) ... [2024-11-04 16:24:43,700 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 04:24:43" (1/1) ... [2024-11-04 16:24:43,787 INFO L138 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 2537 [2024-11-04 16:24:43,787 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-04 16:24:43,788 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-04 16:24:43,788 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-04 16:24:43,788 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-04 16:24:43,796 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 04:24:43" (1/1) ... [2024-11-04 16:24:43,797 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 04:24:43" (1/1) ... [2024-11-04 16:24:43,822 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 04:24:43" (1/1) ... [2024-11-04 16:24:43,864 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]. [2024-11-04 16:24:43,864 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 04:24:43" (1/1) ... [2024-11-04 16:24:43,864 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 04:24:43" (1/1) ... [2024-11-04 16:24:43,892 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 04:24:43" (1/1) ... [2024-11-04 16:24:43,897 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 04:24:43" (1/1) ... [2024-11-04 16:24:43,912 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 04:24:43" (1/1) ... [2024-11-04 16:24:43,924 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 04:24:43" (1/1) ... [2024-11-04 16:24:43,941 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-04 16:24:43,943 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-04 16:24:43,943 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-04 16:24:43,943 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-04 16:24:43,944 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 04:24:43" (1/1) ... [2024-11-04 16:24:43,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-04 16:24:43,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-04 16:24:43,968 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) [2024-11-04 16:24:43,977 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 [2024-11-04 16:24:43,997 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-04 16:24:43,997 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-11-04 16:24:43,997 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-04 16:24:43,997 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-04 16:24:43,997 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-04 16:24:43,997 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-04 16:24:44,286 INFO L238 CfgBuilder]: Building ICFG [2024-11-04 16:24:44,288 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-04 16:24:46,619 INFO L? ?]: Removed 244 outVars from TransFormulas that were not future-live. [2024-11-04 16:24:46,621 INFO L287 CfgBuilder]: Performing block encoding [2024-11-04 16:24:46,634 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-04 16:24:46,635 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-04 16:24:46,635 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.11 04:24:46 BoogieIcfgContainer [2024-11-04 16:24:46,635 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-04 16:24:46,637 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-04 16:24:46,637 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-04 16:24:46,640 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-04 16:24:46,641 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.11 04:24:42" (1/3) ... [2024-11-04 16:24:46,641 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48a3d24e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.11 04:24:46, skipping insertion in model container [2024-11-04 16:24:46,642 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 04:24:43" (2/3) ... [2024-11-04 16:24:46,642 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48a3d24e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.11 04:24:46, skipping insertion in model container [2024-11-04 16:24:46,642 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.11 04:24:46" (3/3) ... [2024-11-04 16:24:46,643 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.h_Vsa16.c [2024-11-04 16:24:46,664 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-04 16:24:46,664 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-04 16:24:46,717 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-04 16:24:46,723 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;@503a2417, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-04 16:24:46,723 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-04 16:24:46,727 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 14 states have internal predecessors, (16), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-04 16:24:46,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-04 16:24:46,732 INFO L207 NwaCegarLoop]: Found error trace [2024-11-04 16:24:46,732 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-04 16:24:46,733 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-04 16:24:46,738 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-04 16:24:46,738 INFO L85 PathProgramCache]: Analyzing trace with hash 1806584026, now seen corresponding path program 1 times [2024-11-04 16:24:46,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-04 16:24:46,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2128455340] [2024-11-04 16:24:46,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-04 16:24:46,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-04 16:24:46,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-04 16:24:46,751 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-04 16:24:46,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-04 16:24:47,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-04 16:24:47,268 INFO L255 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-04 16:24:47,279 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-04 16:24:47,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-04 16:24:47,461 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-04 16:24:47,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-04 16:24:47,679 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-04 16:24:47,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2128455340] [2024-11-04 16:24:47,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [2128455340] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-04 16:24:47,680 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-04 16:24:47,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2024-11-04 16:24:47,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803340159] [2024-11-04 16:24:47,683 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-04 16:24:47,687 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-04 16:24:47,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-04 16:24:47,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-04 16:24:47,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-11-04 16:24:47,706 INFO L87 Difference]: Start difference. First operand has 20 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 14 states have internal predecessors, (16), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 10 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-04 16:24:47,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-04 16:24:47,971 INFO L93 Difference]: Finished difference Result 48 states and 70 transitions. [2024-11-04 16:24:47,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-04 16:24:47,974 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-11-04 16:24:47,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-04 16:24:47,979 INFO L225 Difference]: With dead ends: 48 [2024-11-04 16:24:47,980 INFO L226 Difference]: Without dead ends: 30 [2024-11-04 16:24:47,982 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-11-04 16:24:47,985 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 13 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-04 16:24:47,986 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 82 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-04 16:24:47,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-11-04 16:24:48,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 23. [2024-11-04 16:24:48,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 16 states have internal predecessors, (16), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-04 16:24:48,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2024-11-04 16:24:48,016 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 7 [2024-11-04 16:24:48,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-04 16:24:48,016 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2024-11-04 16:24:48,016 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-04 16:24:48,016 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2024-11-04 16:24:48,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-04 16:24:48,017 INFO L207 NwaCegarLoop]: Found error trace [2024-11-04 16:24:48,017 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-04 16:24:48,034 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-04 16:24:48,222 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-04 16:24:48,222 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-04 16:24:48,222 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-04 16:24:48,223 INFO L85 PathProgramCache]: Analyzing trace with hash -2036583178, now seen corresponding path program 1 times [2024-11-04 16:24:48,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-04 16:24:48,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1092268317] [2024-11-04 16:24:48,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-04 16:24:48,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-04 16:24:48,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-04 16:24:48,225 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-04 16:24:48,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-04 16:24:48,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-04 16:24:48,585 INFO L255 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-04 16:24:48,594 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-04 16:24:48,739 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-04 16:24:48,740 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-04 16:24:49,056 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-04 16:24:49,057 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-04 16:24:49,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1092268317] [2024-11-04 16:24:49,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1092268317] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-04 16:24:49,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-04 16:24:49,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 11 [2024-11-04 16:24:49,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272574212] [2024-11-04 16:24:49,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-04 16:24:49,058 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-04 16:24:49,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-04 16:24:49,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-04 16:24:49,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-11-04 16:24:49,061 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-04 16:24:53,299 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2024-11-04 16:24:58,293 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.99s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2024-11-04 16:25:03,364 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 5.07s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2024-11-04 16:25:04,528 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2024-11-04 16:25:08,599 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.05s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2024-11-04 16:25:14,254 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 5.65s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2024-11-04 16:25:19,991 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 5.74s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2024-11-04 16:25:23,293 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.30s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2024-11-04 16:25:24,497 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2024-11-04 16:25:24,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-04 16:25:24,866 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2024-11-04 16:25:24,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-04 16:25:24,874 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2024-11-04 16:25:24,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-04 16:25:24,876 INFO L225 Difference]: With dead ends: 36 [2024-11-04 16:25:24,876 INFO L226 Difference]: Without dead ends: 34 [2024-11-04 16:25:24,877 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2024-11-04 16:25:24,878 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 8 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 6 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 35.7s IncrementalHoareTripleChecker+Time [2024-11-04 16:25:24,879 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 72 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 37 Invalid, 6 Unknown, 0 Unchecked, 35.7s Time] [2024-11-04 16:25:24,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-11-04 16:25:24,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 29. [2024-11-04 16:25:24,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.0526315789473684) internal successors, (20), 20 states have internal predecessors, (20), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-04 16:25:24,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2024-11-04 16:25:24,893 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 13 [2024-11-04 16:25:24,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-04 16:25:24,893 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2024-11-04 16:25:24,894 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-04 16:25:24,894 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2024-11-04 16:25:24,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-04 16:25:24,894 INFO L207 NwaCegarLoop]: Found error trace [2024-11-04 16:25:24,894 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-04 16:25:24,912 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-04 16:25:25,095 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-04 16:25:25,095 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-04 16:25:25,096 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-04 16:25:25,096 INFO L85 PathProgramCache]: Analyzing trace with hash 119432464, now seen corresponding path program 1 times [2024-11-04 16:25:25,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-04 16:25:25,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [464274355] [2024-11-04 16:25:25,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-04 16:25:25,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-04 16:25:25,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-04 16:25:25,098 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-04 16:25:25,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-04 16:25:25,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-04 16:25:25,429 INFO L255 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-04 16:25:25,440 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-04 16:25:27,246 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-04 16:25:27,247 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-04 16:25:29,283 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-04 16:25:29,284 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-04 16:25:29,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [464274355] [2024-11-04 16:25:29,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [464274355] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-04 16:25:29,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-04 16:25:29,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 11 [2024-11-04 16:25:29,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349615527] [2024-11-04 16:25:29,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-04 16:25:29,285 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-04 16:25:29,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-04 16:25:29,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-04 16:25:29,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-11-04 16:25:29,286 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-04 16:25:31,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-04 16:25:31,091 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2024-11-04 16:25:31,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-04 16:25:31,092 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2024-11-04 16:25:31,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-04 16:25:31,093 INFO L225 Difference]: With dead ends: 40 [2024-11-04 16:25:31,093 INFO L226 Difference]: Without dead ends: 38 [2024-11-04 16:25:31,094 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2024-11-04 16:25:31,095 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 6 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-04 16:25:31,095 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 67 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-04 16:25:31,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2024-11-04 16:25:31,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2024-11-04 16:25:31,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 24 states have internal predecessors, (24), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-04 16:25:31,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2024-11-04 16:25:31,104 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 19 [2024-11-04 16:25:31,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-04 16:25:31,105 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2024-11-04 16:25:31,105 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-04 16:25:31,105 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2024-11-04 16:25:31,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-04 16:25:31,107 INFO L207 NwaCegarLoop]: Found error trace [2024-11-04 16:25:31,107 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-04 16:25:31,122 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-04 16:25:31,308 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-04 16:25:31,308 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-04 16:25:31,309 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-04 16:25:31,309 INFO L85 PathProgramCache]: Analyzing trace with hash 740647592, now seen corresponding path program 1 times [2024-11-04 16:25:31,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-04 16:25:31,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [197977221] [2024-11-04 16:25:31,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-04 16:25:31,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-04 16:25:31,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-04 16:25:31,311 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-04 16:25:31,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-04 16:25:31,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-04 16:25:31,684 INFO L255 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 68 conjuncts are in the unsatisfiable core [2024-11-04 16:25:31,698 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-04 16:25:35,414 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-04 16:25:35,414 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-04 16:26:10,629 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-04 16:26:10,629 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-04 16:26:10,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [197977221] [2024-11-04 16:26:10,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [197977221] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-04 16:26:10,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-04 16:26:10,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 15 [2024-11-04 16:26:10,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797581988] [2024-11-04 16:26:10,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-04 16:26:10,630 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-04 16:26:10,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-04 16:26:10,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-04 16:26:10,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2024-11-04 16:26:10,632 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-04 16:26:16,587 WARN L286 SmtUtils]: Spent 5.05s on a formula simplification that was a NOOP. DAG size: 175 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-04 16:26:21,004 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [1]