/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --cacsl2boogietranslator.allow.undefined.functions true --traceabstraction.smt.solver External_ModelsAndUnsatCoreMode --traceabstraction.command.for.external.solver 'cvc4 --incremental --print-success --lang smt' -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Bitvector.epf -i ../../../trunk/examples/svcomp/bitvector/sum02-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.5-dev-356b6ba-m [2024-10-31 19:33:10,756 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-31 19:33:10,848 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Bitvector.epf [2024-10-31 19:33:10,856 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-31 19:33:10,856 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-31 19:33:10,892 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-31 19:33:10,893 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-31 19:33:10,893 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-31 19:33:10,894 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-31 19:33:10,894 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-31 19:33:10,895 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-31 19:33:10,895 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-31 19:33:10,896 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-31 19:33:10,896 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-31 19:33:10,896 INFO L153 SettingsManager]: * Use SBE=true [2024-10-31 19:33:10,897 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-31 19:33:10,897 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-31 19:33:10,897 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-31 19:33:10,898 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-31 19:33:10,898 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-31 19:33:10,899 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-31 19:33:10,902 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-31 19:33:10,902 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-31 19:33:10,902 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-31 19:33:10,902 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-10-31 19:33:10,903 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-31 19:33:10,903 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-10-31 19:33:10,903 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-31 19:33:10,904 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-31 19:33:10,904 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-31 19:33:10,904 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-31 19:33:10,904 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-31 19:33:10,905 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-31 19:33:10,905 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-31 19:33:10,908 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 19:33:10,908 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-31 19:33:10,908 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-31 19:33:10,909 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-31 19:33:10,909 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2024-10-31 19:33:10,909 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-10-31 19:33:10,909 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-31 19:33:10,910 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-31 19:33:10,910 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-31 19:33:10,910 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-31 19:33:10,910 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2024-10-31 19:33:10,910 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Allow undefined functions -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Command for external solver -> cvc4 --incremental --print-success --lang smt [2024-10-31 19:33:11,230 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-31 19:33:11,251 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-31 19:33:11,254 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-31 19:33:11,255 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-31 19:33:11,257 INFO L274 PluginConnector]: CDTParser initialized [2024-10-31 19:33:11,258 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/sum02-1.c [2024-10-31 19:33:12,844 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-31 19:33:13,040 INFO L384 CDTParser]: Found 1 translation units. [2024-10-31 19:33:13,041 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/bitvector/sum02-1.c [2024-10-31 19:33:13,049 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a768423c9/4823e84c7e8e43e5a115c377f78d7552/FLAG281b0f958 [2024-10-31 19:33:13,068 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a768423c9/4823e84c7e8e43e5a115c377f78d7552 [2024-10-31 19:33:13,071 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-31 19:33:13,073 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-10-31 19:33:13,075 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-31 19:33:13,076 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-31 19:33:13,081 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-31 19:33:13,082 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 07:33:13" (1/1) ... [2024-10-31 19:33:13,083 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21ef2bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 07:33:13, skipping insertion in model container [2024-10-31 19:33:13,083 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 07:33:13" (1/1) ... [2024-10-31 19:33:13,102 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-31 19:33:13,268 WARN L251 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/bitvector/sum02-1.c[624,637] [2024-10-31 19:33:13,284 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 19:33:13,295 INFO L200 MainTranslator]: Completed pre-run [2024-10-31 19:33:13,307 WARN L251 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/bitvector/sum02-1.c[624,637] [2024-10-31 19:33:13,311 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 19:33:13,329 INFO L204 MainTranslator]: Completed translation [2024-10-31 19:33:13,331 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 07:33:13 WrapperNode [2024-10-31 19:33:13,331 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-31 19:33:13,332 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-31 19:33:13,333 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-31 19:33:13,333 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-31 19:33:13,339 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 07:33:13" (1/1) ... [2024-10-31 19:33:13,346 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 07:33:13" (1/1) ... [2024-10-31 19:33:13,362 INFO L138 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 30 [2024-10-31 19:33:13,362 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-31 19:33:13,363 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-31 19:33:13,363 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-31 19:33:13,363 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-31 19:33:13,374 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 07:33:13" (1/1) ... [2024-10-31 19:33:13,374 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 07:33:13" (1/1) ... [2024-10-31 19:33:13,376 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 07:33:13" (1/1) ... [2024-10-31 19:33:13,387 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-10-31 19:33:13,388 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 07:33:13" (1/1) ... [2024-10-31 19:33:13,389 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 07:33:13" (1/1) ... [2024-10-31 19:33:13,397 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 07:33:13" (1/1) ... [2024-10-31 19:33:13,400 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 07:33:13" (1/1) ... [2024-10-31 19:33:13,401 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 07:33:13" (1/1) ... [2024-10-31 19:33:13,402 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 07:33:13" (1/1) ... [2024-10-31 19:33:13,408 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-31 19:33:13,409 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-31 19:33:13,410 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-31 19:33:13,410 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-31 19:33:13,411 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 07:33:13" (1/1) ... [2024-10-31 19:33:13,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 19:33:13,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-31 19:33:13,442 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-31 19:33:13,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-31 19:33:13,466 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-31 19:33:13,466 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-31 19:33:13,466 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-31 19:33:13,466 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-10-31 19:33:13,524 INFO L238 CfgBuilder]: Building ICFG [2024-10-31 19:33:13,526 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-31 19:33:13,675 INFO L? ?]: Removed 8 outVars from TransFormulas that were not future-live. [2024-10-31 19:33:13,675 INFO L287 CfgBuilder]: Performing block encoding [2024-10-31 19:33:13,692 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-31 19:33:13,692 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-10-31 19:33:13,693 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 07:33:13 BoogieIcfgContainer [2024-10-31 19:33:13,693 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-31 19:33:13,696 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-31 19:33:13,696 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-31 19:33:13,700 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-31 19:33:13,700 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.10 07:33:13" (1/3) ... [2024-10-31 19:33:13,701 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6898fee6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 07:33:13, skipping insertion in model container [2024-10-31 19:33:13,701 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 07:33:13" (2/3) ... [2024-10-31 19:33:13,702 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6898fee6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 07:33:13, skipping insertion in model container [2024-10-31 19:33:13,702 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 07:33:13" (3/3) ... [2024-10-31 19:33:13,703 INFO L112 eAbstractionObserver]: Analyzing ICFG sum02-1.c [2024-10-31 19:33:13,720 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-31 19:33:13,720 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-31 19:33:13,785 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-31 19:33:13,792 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;@40d32af3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-31 19:33:13,792 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-31 19:33:13,797 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:33:13,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-10-31 19:33:13,803 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 19:33:13,804 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-10-31 19:33:13,804 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 19:33:13,810 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 19:33:13,810 INFO L85 PathProgramCache]: Analyzing trace with hash 889605037, now seen corresponding path program 1 times [2024-10-31 19:33:13,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 19:33:13,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1803188024] [2024-10-31 19:33:13,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 19:33:13,821 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-10-31 19:33:13,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-10-31 19:33:13,824 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-10-31 19:33:13,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (2)] Waiting until timeout for monitored process [2024-10-31 19:33:13,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 19:33:13,903 INFO L255 TraceCheckSpWp]: Trace formula consists of 19 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-31 19:33:13,908 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 19:33:13,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 19:33:13,997 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 19:33:14,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 19:33:14,114 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 19:33:14,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1803188024] [2024-10-31 19:33:14,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1803188024] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 19:33:14,115 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 19:33:14,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2024-10-31 19:33:14,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598954626] [2024-10-31 19:33:14,119 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 19:33:14,122 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 19:33:14,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 19:33:14,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 19:33:14,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-31 19:33:14,150 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:33:14,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 19:33:14,215 INFO L93 Difference]: Finished difference Result 23 states and 28 transitions. [2024-10-31 19:33:14,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 19:33:14,217 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2024-10-31 19:33:14,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 19:33:14,225 INFO L225 Difference]: With dead ends: 23 [2024-10-31 19:33:14,225 INFO L226 Difference]: Without dead ends: 9 [2024-10-31 19:33:14,228 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-31 19:33:14,231 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 19:33:14,232 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 19:33:14,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2024-10-31 19:33:14,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2024-10-31 19:33:14,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:33:14,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2024-10-31 19:33:14,256 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2024-10-31 19:33:14,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 19:33:14,257 INFO L471 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2024-10-31 19:33:14,257 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:33:14,257 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2024-10-31 19:33:14,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-10-31 19:33:14,257 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 19:33:14,257 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 19:33:14,260 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (2)] Ended with exit code 0 [2024-10-31 19:33:14,458 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-10-31 19:33:14,458 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 19:33:14,459 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 19:33:14,459 INFO L85 PathProgramCache]: Analyzing trace with hash 265180975, now seen corresponding path program 1 times [2024-10-31 19:33:14,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 19:33:14,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1615089996] [2024-10-31 19:33:14,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 19:33:14,460 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-10-31 19:33:14,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-10-31 19:33:14,461 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-10-31 19:33:14,462 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (3)] Waiting until timeout for monitored process [2024-10-31 19:33:14,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 19:33:14,537 INFO L255 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-31 19:33:14,540 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 19:33:14,621 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 19:33:14,621 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 19:33:14,777 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 19:33:14,777 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 19:33:14,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1615089996] [2024-10-31 19:33:14,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1615089996] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 19:33:14,781 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 19:33:14,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2024-10-31 19:33:14,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077546920] [2024-10-31 19:33:14,782 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 19:33:14,783 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-31 19:33:14,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 19:33:14,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-31 19:33:14,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-10-31 19:33:14,786 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:33:14,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 19:33:14,850 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2024-10-31 19:33:14,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 19:33:14,851 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-10-31 19:33:14,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 19:33:14,852 INFO L225 Difference]: With dead ends: 15 [2024-10-31 19:33:14,852 INFO L226 Difference]: Without dead ends: 11 [2024-10-31 19:33:14,852 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-10-31 19:33:14,853 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 19:33:14,854 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 19:33:14,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2024-10-31 19:33:14,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2024-10-31 19:33:14,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:33:14,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2024-10-31 19:33:14,857 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2024-10-31 19:33:14,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 19:33:14,858 INFO L471 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2024-10-31 19:33:14,858 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:33:14,858 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2024-10-31 19:33:14,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-10-31 19:33:14,858 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 19:33:14,859 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2024-10-31 19:33:14,863 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (3)] Ended with exit code 0 [2024-10-31 19:33:15,061 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-10-31 19:33:15,062 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 19:33:15,062 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 19:33:15,063 INFO L85 PathProgramCache]: Analyzing trace with hash 1489078833, now seen corresponding path program 2 times [2024-10-31 19:33:15,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 19:33:15,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1394316264] [2024-10-31 19:33:15,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 19:33:15,063 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-10-31 19:33:15,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-10-31 19:33:15,066 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-10-31 19:33:15,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2024-10-31 19:33:15,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 19:33:15,123 INFO L255 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-31 19:33:15,125 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 19:33:15,387 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 19:33:15,388 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 19:33:17,792 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 19:33:17,792 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 19:33:17,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1394316264] [2024-10-31 19:33:17,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1394316264] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 19:33:17,793 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 19:33:17,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2024-10-31 19:33:17,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426978681] [2024-10-31 19:33:17,793 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 19:33:17,794 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-31 19:33:17,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 19:33:17,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-31 19:33:17,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2024-10-31 19:33:17,795 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand has 15 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:33:19,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 19:33:19,963 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2024-10-31 19:33:19,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-31 19:33:19,964 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-10-31 19:33:19,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 19:33:19,964 INFO L225 Difference]: With dead ends: 22 [2024-10-31 19:33:19,965 INFO L226 Difference]: Without dead ends: 17 [2024-10-31 19:33:19,965 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2024-10-31 19:33:19,966 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-31 19:33:19,967 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 25 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-31 19:33:19,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2024-10-31 19:33:19,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2024-10-31 19:33:19,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.0625) internal successors, (17), 16 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:33:19,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2024-10-31 19:33:19,973 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 10 [2024-10-31 19:33:19,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 19:33:19,973 INFO L471 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2024-10-31 19:33:19,973 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:33:19,973 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2024-10-31 19:33:19,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-10-31 19:33:19,974 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 19:33:19,974 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1] [2024-10-31 19:33:19,978 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (4)] Ended with exit code 0 [2024-10-31 19:33:20,176 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-10-31 19:33:20,177 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 19:33:20,177 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 19:33:20,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1715425335, now seen corresponding path program 3 times [2024-10-31 19:33:20,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 19:33:20,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [268561042] [2024-10-31 19:33:20,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 19:33:20,178 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-10-31 19:33:20,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-10-31 19:33:20,181 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-10-31 19:33:20,182 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2024-10-31 19:33:20,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 19:33:20,239 WARN L253 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-31 19:33:20,241 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 19:33:20,606 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 19:33:20,606 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 19:33:28,640 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 19:33:28,641 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 19:33:28,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [268561042] [2024-10-31 19:33:28,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [268561042] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 19:33:28,642 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 19:33:28,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2024-10-31 19:33:28,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210986250] [2024-10-31 19:33:28,642 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 19:33:28,643 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-10-31 19:33:28,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 19:33:28,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-10-31 19:33:28,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=586, Unknown=0, NotChecked=0, Total=702 [2024-10-31 19:33:28,645 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand has 27 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 27 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:33:57,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 19:33:57,266 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2024-10-31 19:33:57,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-10-31 19:33:57,267 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 27 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2024-10-31 19:33:57,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 19:33:57,268 INFO L225 Difference]: With dead ends: 34 [2024-10-31 19:33:57,268 INFO L226 Difference]: Without dead ends: 29 [2024-10-31 19:33:57,269 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 32.6s TimeCoverageRelationStatistics Valid=289, Invalid=1432, Unknown=1, NotChecked=0, Total=1722 [2024-10-31 19:33:57,269 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2024-10-31 19:33:57,270 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 55 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2024-10-31 19:33:57,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-10-31 19:33:57,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2024-10-31 19:33:57,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 28 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:33:57,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2024-10-31 19:33:57,281 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 16 [2024-10-31 19:33:57,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 19:33:57,281 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2024-10-31 19:33:57,281 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 27 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:33:57,281 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2024-10-31 19:33:57,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-10-31 19:33:57,284 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 19:33:57,284 INFO L215 NwaCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1] [2024-10-31 19:33:57,289 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (5)] Ended with exit code 0 [2024-10-31 19:33:57,484 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-10-31 19:33:57,485 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 19:33:57,485 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 19:33:57,485 INFO L85 PathProgramCache]: Analyzing trace with hash -1723013437, now seen corresponding path program 4 times [2024-10-31 19:33:57,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 19:33:57,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [315288770] [2024-10-31 19:33:57,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 19:33:57,486 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-10-31 19:33:57,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-10-31 19:33:57,487 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-10-31 19:33:57,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2024-10-31 19:33:57,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 19:33:57,562 WARN L253 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-10-31 19:33:57,564 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 19:33:58,405 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 19:33:58,406 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 19:34:32,122 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 19:34:32,122 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 19:34:32,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [315288770] [2024-10-31 19:34:32,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [315288770] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 19:34:32,123 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 19:34:32,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 27] total 51 [2024-10-31 19:34:32,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560444074] [2024-10-31 19:34:32,123 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 19:34:32,123 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-10-31 19:34:32,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 19:34:32,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-10-31 19:34:32,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=359, Invalid=2191, Unknown=0, NotChecked=0, Total=2550 [2024-10-31 19:34:32,125 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand has 51 states, 51 states have (on average 1.0588235294117647) internal successors, (54), 51 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)