/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --cacsl2boogietranslator.allow.undefined.functions true --traceabstraction.smt.solver External_ModelsAndUnsatCoreMode --traceabstraction.command.for.external.solver 'cvc4 --incremental --print-success --lang smt' -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Bitvector.epf -i ../../../trunk/examples/svcomp/bitvector/byte_add-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.5-dev-356b6ba-m [2024-10-31 19:31:16,948 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-31 19:31:17,013 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Bitvector.epf [2024-10-31 19:31:17,017 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-31 19:31:17,018 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-31 19:31:17,070 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-31 19:31:17,070 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-31 19:31:17,071 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-31 19:31:17,071 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-31 19:31:17,072 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-31 19:31:17,072 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-31 19:31:17,072 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-31 19:31:17,073 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-31 19:31:17,073 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-31 19:31:17,074 INFO L153 SettingsManager]: * Use SBE=true [2024-10-31 19:31:17,074 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-31 19:31:17,074 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-31 19:31:17,075 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-31 19:31:17,077 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-31 19:31:17,077 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-31 19:31:17,080 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-31 19:31:17,080 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-31 19:31:17,080 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-31 19:31:17,081 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-31 19:31:17,081 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-10-31 19:31:17,081 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-31 19:31:17,082 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-10-31 19:31:17,082 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-31 19:31:17,082 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-31 19:31:17,082 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-31 19:31:17,082 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-31 19:31:17,083 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-31 19:31:17,083 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-31 19:31:17,083 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-31 19:31:17,083 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 19:31:17,084 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-31 19:31:17,085 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-31 19:31:17,087 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-31 19:31:17,087 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2024-10-31 19:31:17,087 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-10-31 19:31:17,087 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-31 19:31:17,087 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-31 19:31:17,088 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-31 19:31:17,088 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-31 19:31:17,088 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2024-10-31 19:31:17,088 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Allow undefined functions -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Command for external solver -> cvc4 --incremental --print-success --lang smt [2024-10-31 19:31:17,390 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-31 19:31:17,410 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-31 19:31:17,413 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-31 19:31:17,414 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-31 19:31:17,418 INFO L274 PluginConnector]: CDTParser initialized [2024-10-31 19:31:17,419 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/byte_add-1.i [2024-10-31 19:31:18,861 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-31 19:31:19,076 INFO L384 CDTParser]: Found 1 translation units. [2024-10-31 19:31:19,077 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/bitvector/byte_add-1.i [2024-10-31 19:31:19,084 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/704aa96a5/0734e3c1bcf04d8a85af6f6d63f823fb/FLAG97d39a691 [2024-10-31 19:31:19,095 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/704aa96a5/0734e3c1bcf04d8a85af6f6d63f823fb [2024-10-31 19:31:19,096 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-31 19:31:19,097 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-10-31 19:31:19,098 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-31 19:31:19,098 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-31 19:31:19,103 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-31 19:31:19,104 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 07:31:19" (1/1) ... [2024-10-31 19:31:19,105 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f8ad2ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 07:31:19, skipping insertion in model container [2024-10-31 19:31:19,105 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 07:31:19" (1/1) ... [2024-10-31 19:31:19,125 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-31 19:31:19,271 WARN L251 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/bitvector/byte_add-1.i[1166,1179] [2024-10-31 19:31:19,305 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 19:31:19,316 INFO L200 MainTranslator]: Completed pre-run [2024-10-31 19:31:19,326 WARN L251 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/bitvector/byte_add-1.i[1166,1179] [2024-10-31 19:31:19,351 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 19:31:19,366 INFO L204 MainTranslator]: Completed translation [2024-10-31 19:31:19,367 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 07:31:19 WrapperNode [2024-10-31 19:31:19,367 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-31 19:31:19,368 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-31 19:31:19,368 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-31 19:31:19,368 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-31 19:31:19,373 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 07:31:19" (1/1) ... [2024-10-31 19:31:19,384 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 07:31:19" (1/1) ... [2024-10-31 19:31:19,405 INFO L138 Inliner]: procedures = 16, calls = 8, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 125 [2024-10-31 19:31:19,405 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-31 19:31:19,406 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-31 19:31:19,406 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-31 19:31:19,406 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-31 19:31:19,415 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 07:31:19" (1/1) ... [2024-10-31 19:31:19,415 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 07:31:19" (1/1) ... [2024-10-31 19:31:19,418 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 07:31:19" (1/1) ... [2024-10-31 19:31:19,427 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-10-31 19:31:19,427 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 07:31:19" (1/1) ... [2024-10-31 19:31:19,427 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 07:31:19" (1/1) ... [2024-10-31 19:31:19,436 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 07:31:19" (1/1) ... [2024-10-31 19:31:19,439 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 07:31:19" (1/1) ... [2024-10-31 19:31:19,440 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 07:31:19" (1/1) ... [2024-10-31 19:31:19,441 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 07:31:19" (1/1) ... [2024-10-31 19:31:19,444 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-31 19:31:19,445 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-31 19:31:19,445 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-31 19:31:19,445 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-31 19:31:19,446 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 07:31:19" (1/1) ... [2024-10-31 19:31:19,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 19:31:19,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-31 19:31:19,479 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-31 19:31:19,482 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-31 19:31:19,507 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-31 19:31:19,507 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-10-31 19:31:19,508 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-31 19:31:19,508 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-31 19:31:19,575 INFO L238 CfgBuilder]: Building ICFG [2024-10-31 19:31:19,577 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-31 19:31:19,914 INFO L? ?]: Removed 23 outVars from TransFormulas that were not future-live. [2024-10-31 19:31:19,914 INFO L287 CfgBuilder]: Performing block encoding [2024-10-31 19:31:19,925 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-31 19:31:19,925 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-10-31 19:31:19,925 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 07:31:19 BoogieIcfgContainer [2024-10-31 19:31:19,925 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-31 19:31:19,929 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-31 19:31:19,929 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-31 19:31:19,932 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-31 19:31:19,932 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.10 07:31:19" (1/3) ... [2024-10-31 19:31:19,933 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d5d5b24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 07:31:19, skipping insertion in model container [2024-10-31 19:31:19,933 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 07:31:19" (2/3) ... [2024-10-31 19:31:19,933 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d5d5b24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 07:31:19, skipping insertion in model container [2024-10-31 19:31:19,934 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 07:31:19" (3/3) ... [2024-10-31 19:31:19,935 INFO L112 eAbstractionObserver]: Analyzing ICFG byte_add-1.i [2024-10-31 19:31:19,951 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-31 19:31:19,951 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-31 19:31:20,005 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-31 19:31:20,011 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;@45c82385, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-31 19:31:20,012 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-31 19:31:20,017 INFO L276 IsEmpty]: Start isEmpty. Operand has 42 states, 40 states have (on average 1.775) internal successors, (71), 41 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:31:20,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-10-31 19:31:20,022 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 19:31:20,023 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 19:31:20,023 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 19:31:20,028 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 19:31:20,029 INFO L85 PathProgramCache]: Analyzing trace with hash 255061167, now seen corresponding path program 1 times [2024-10-31 19:31:20,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 19:31:20,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [783138442] [2024-10-31 19:31:20,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 19:31:20,040 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-10-31 19:31:20,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-10-31 19:31:20,044 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-10-31 19:31:20,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (2)] Waiting until timeout for monitored process [2024-10-31 19:31:20,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 19:31:20,138 INFO L255 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 1 conjuncts are in the unsatisfiable core [2024-10-31 19:31:20,142 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 19:31:20,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 19:31:20,163 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 19:31:20,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 19:31:20,167 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 19:31:20,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [783138442] [2024-10-31 19:31:20,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [783138442] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 19:31:20,168 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 19:31:20,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2024-10-31 19:31:20,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057224061] [2024-10-31 19:31:20,170 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 19:31:20,173 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-31 19:31:20,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 19:31:20,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-31 19:31:20,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-31 19:31:20,194 INFO L87 Difference]: Start difference. First operand has 42 states, 40 states have (on average 1.775) internal successors, (71), 41 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:31:20,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 19:31:20,207 INFO L93 Difference]: Finished difference Result 57 states and 92 transitions. [2024-10-31 19:31:20,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-31 19:31:20,209 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2024-10-31 19:31:20,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 19:31:20,215 INFO L225 Difference]: With dead ends: 57 [2024-10-31 19:31:20,215 INFO L226 Difference]: Without dead ends: 38 [2024-10-31 19:31:20,217 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-31 19:31:20,220 INFO L432 NwaCegarLoop]: 68 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 19:31:20,221 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 19:31:20,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2024-10-31 19:31:20,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2024-10-31 19:31:20,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.7297297297297298) internal successors, (64), 37 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:31:20,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 64 transitions. [2024-10-31 19:31:20,248 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 64 transitions. Word has length 12 [2024-10-31 19:31:20,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 19:31:20,249 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 64 transitions. [2024-10-31 19:31:20,250 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:31:20,250 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 64 transitions. [2024-10-31 19:31:20,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-10-31 19:31:20,251 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 19:31:20,251 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 19:31:20,253 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 19:31:20,452 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-10-31 19:31:20,452 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 19:31:20,453 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 19:31:20,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1803477009, now seen corresponding path program 1 times [2024-10-31 19:31:20,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 19:31:20,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1691719028] [2024-10-31 19:31:20,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 19:31:20,454 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-10-31 19:31:20,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-10-31 19:31:20,457 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-10-31 19:31:20,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (3)] Waiting until timeout for monitored process [2024-10-31 19:31:20,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 19:31:20,554 INFO L255 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-31 19:31:20,556 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 19:31:20,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 19:31:20,632 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 19:31:20,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 19:31:20,673 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 19:31:20,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1691719028] [2024-10-31 19:31:20,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1691719028] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 19:31:20,673 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 19:31:20,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2024-10-31 19:31:20,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173633682] [2024-10-31 19:31:20,674 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 19:31:20,676 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-31 19:31:20,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 19:31:20,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-31 19:31:20,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2024-10-31 19:31:20,678 INFO L87 Difference]: Start difference. First operand 38 states and 64 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:31:21,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 19:31:21,050 INFO L93 Difference]: Finished difference Result 141 states and 255 transitions. [2024-10-31 19:31:21,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-31 19:31:21,051 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2024-10-31 19:31:21,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 19:31:21,052 INFO L225 Difference]: With dead ends: 141 [2024-10-31 19:31:21,052 INFO L226 Difference]: Without dead ends: 113 [2024-10-31 19:31:21,053 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2024-10-31 19:31:21,056 INFO L432 NwaCegarLoop]: 44 mSDtfsCounter, 154 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-31 19:31:21,056 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 150 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-31 19:31:21,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2024-10-31 19:31:21,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 101. [2024-10-31 19:31:21,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.67) internal successors, (167), 100 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:31:21,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 167 transitions. [2024-10-31 19:31:21,079 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 167 transitions. Word has length 12 [2024-10-31 19:31:21,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 19:31:21,080 INFO L471 AbstractCegarLoop]: Abstraction has 101 states and 167 transitions. [2024-10-31 19:31:21,080 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:31:21,080 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 167 transitions. [2024-10-31 19:31:21,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-10-31 19:31:21,081 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 19:31:21,081 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 19:31:21,086 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (3)] Forceful destruction successful, exit code 0 [2024-10-31 19:31:21,282 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-10-31 19:31:21,282 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 19:31:21,283 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 19:31:21,283 INFO L85 PathProgramCache]: Analyzing trace with hash 583572890, now seen corresponding path program 1 times [2024-10-31 19:31:21,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 19:31:21,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1656098558] [2024-10-31 19:31:21,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 19:31:21,284 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-10-31 19:31:21,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-10-31 19:31:21,285 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-10-31 19:31:21,286 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2024-10-31 19:31:21,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 19:31:21,362 INFO L255 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-31 19:31:21,364 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 19:31:21,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 19:31:21,415 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 19:31:21,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 19:31:21,482 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 19:31:21,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1656098558] [2024-10-31 19:31:21,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1656098558] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 19:31:21,483 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 19:31:21,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2024-10-31 19:31:21,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912750015] [2024-10-31 19:31:21,483 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 19:31:21,484 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-31 19:31:21,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 19:31:21,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-31 19:31:21,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-10-31 19:31:21,485 INFO L87 Difference]: Start difference. First operand 101 states and 167 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:31:22,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 19:31:22,014 INFO L93 Difference]: Finished difference Result 274 states and 490 transitions. [2024-10-31 19:31:22,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-31 19:31:22,015 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2024-10-31 19:31:22,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 19:31:22,017 INFO L225 Difference]: With dead ends: 274 [2024-10-31 19:31:22,017 INFO L226 Difference]: Without dead ends: 229 [2024-10-31 19:31:22,017 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2024-10-31 19:31:22,018 INFO L432 NwaCegarLoop]: 44 mSDtfsCounter, 793 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 793 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-31 19:31:22,019 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [793 Valid, 169 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 380 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-31 19:31:22,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2024-10-31 19:31:22,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 190. [2024-10-31 19:31:22,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 1.656084656084656) internal successors, (313), 189 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:31:22,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 313 transitions. [2024-10-31 19:31:22,037 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 313 transitions. Word has length 14 [2024-10-31 19:31:22,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 19:31:22,037 INFO L471 AbstractCegarLoop]: Abstraction has 190 states and 313 transitions. [2024-10-31 19:31:22,037 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:31:22,037 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 313 transitions. [2024-10-31 19:31:22,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-10-31 19:31:22,039 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 19:31:22,039 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 19:31:22,042 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (4)] Ended with exit code 0 [2024-10-31 19:31:22,241 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-10-31 19:31:22,242 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 19:31:22,242 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 19:31:22,242 INFO L85 PathProgramCache]: Analyzing trace with hash -842586557, now seen corresponding path program 1 times [2024-10-31 19:31:22,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 19:31:22,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1227889727] [2024-10-31 19:31:22,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 19:31:22,243 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-10-31 19:31:22,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-10-31 19:31:22,246 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-10-31 19:31:22,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2024-10-31 19:31:22,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 19:31:22,311 INFO L255 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-31 19:31:22,313 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 19:31:22,336 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 19:31:22,336 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 19:31:22,351 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 19:31:22,351 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 19:31:22,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1227889727] [2024-10-31 19:31:22,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1227889727] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 19:31:22,351 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 19:31:22,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2024-10-31 19:31:22,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770785181] [2024-10-31 19:31:22,352 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 19:31:22,352 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 19:31:22,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 19:31:22,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 19:31:22,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-31 19:31:22,353 INFO L87 Difference]: Start difference. First operand 190 states and 313 transitions. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:31:22,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 19:31:22,488 INFO L93 Difference]: Finished difference Result 488 states and 820 transitions. [2024-10-31 19:31:22,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 19:31:22,489 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 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 26 [2024-10-31 19:31:22,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 19:31:22,490 INFO L225 Difference]: With dead ends: 488 [2024-10-31 19:31:22,491 INFO L226 Difference]: Without dead ends: 323 [2024-10-31 19:31:22,492 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-31 19:31:22,492 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 49 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 19:31:22,493 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 64 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 19:31:22,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2024-10-31 19:31:22,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 291. [2024-10-31 19:31:22,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 1.5517241379310345) internal successors, (450), 290 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:31:22,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 450 transitions. [2024-10-31 19:31:22,531 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 450 transitions. Word has length 26 [2024-10-31 19:31:22,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 19:31:22,531 INFO L471 AbstractCegarLoop]: Abstraction has 291 states and 450 transitions. [2024-10-31 19:31:22,531 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:31:22,531 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 450 transitions. [2024-10-31 19:31:22,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-10-31 19:31:22,533 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 19:31:22,533 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 19:31:22,540 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (5)] Ended with exit code 0 [2024-10-31 19:31:22,733 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-10-31 19:31:22,733 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 19:31:22,734 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 19:31:22,734 INFO L85 PathProgramCache]: Analyzing trace with hash 1448431171, now seen corresponding path program 1 times [2024-10-31 19:31:22,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 19:31:22,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1611975143] [2024-10-31 19:31:22,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 19:31:22,735 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-10-31 19:31:22,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-10-31 19:31:22,736 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-10-31 19:31:22,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2024-10-31 19:31:22,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 19:31:22,792 INFO L255 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-31 19:31:22,793 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 19:31:22,810 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 19:31:22,810 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 19:31:22,825 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 19:31:22,825 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 19:31:22,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1611975143] [2024-10-31 19:31:22,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1611975143] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 19:31:22,825 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 19:31:22,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2024-10-31 19:31:22,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810044968] [2024-10-31 19:31:22,826 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 19:31:22,826 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 19:31:22,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 19:31:22,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 19:31:22,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-31 19:31:22,827 INFO L87 Difference]: Start difference. First operand 291 states and 450 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:31:22,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 19:31:22,844 INFO L93 Difference]: Finished difference Result 396 states and 607 transitions. [2024-10-31 19:31:22,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 19:31:22,845 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 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 26 [2024-10-31 19:31:22,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 19:31:22,847 INFO L225 Difference]: With dead ends: 396 [2024-10-31 19:31:22,847 INFO L226 Difference]: Without dead ends: 377 [2024-10-31 19:31:22,847 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-31 19:31:22,848 INFO L432 NwaCegarLoop]: 64 mSDtfsCounter, 8 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 19:31:22,849 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 122 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 19:31:22,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2024-10-31 19:31:22,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 365. [2024-10-31 19:31:22,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 364 states have (on average 1.5412087912087913) internal successors, (561), 364 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:31:22,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 561 transitions. [2024-10-31 19:31:22,865 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 561 transitions. Word has length 26 [2024-10-31 19:31:22,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 19:31:22,865 INFO L471 AbstractCegarLoop]: Abstraction has 365 states and 561 transitions. [2024-10-31 19:31:22,865 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:31:22,865 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 561 transitions. [2024-10-31 19:31:22,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-10-31 19:31:22,867 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 19:31:22,867 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 19:31:22,869 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (6)] Ended with exit code 0 [2024-10-31 19:31:23,067 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-10-31 19:31:23,068 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 19:31:23,068 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 19:31:23,068 INFO L85 PathProgramCache]: Analyzing trace with hash 1706596609, now seen corresponding path program 1 times [2024-10-31 19:31:23,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 19:31:23,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1153061360] [2024-10-31 19:31:23,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 19:31:23,068 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-10-31 19:31:23,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-10-31 19:31:23,070 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-10-31 19:31:23,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2024-10-31 19:31:23,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 19:31:23,128 INFO L255 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-31 19:31:23,130 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 19:31:23,162 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 19:31:23,162 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 19:31:23,183 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 19:31:23,183 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 19:31:23,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1153061360] [2024-10-31 19:31:23,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1153061360] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 19:31:23,183 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 19:31:23,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2024-10-31 19:31:23,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367399769] [2024-10-31 19:31:23,184 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 19:31:23,184 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-31 19:31:23,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 19:31:23,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-31 19:31:23,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2024-10-31 19:31:23,185 INFO L87 Difference]: Start difference. First operand 365 states and 561 transitions. Second operand has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:31:23,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 19:31:23,447 INFO L93 Difference]: Finished difference Result 1557 states and 2444 transitions. [2024-10-31 19:31:23,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-31 19:31:23,448 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 states have internal predecessors, (34), 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 26 [2024-10-31 19:31:23,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 19:31:23,452 INFO L225 Difference]: With dead ends: 1557 [2024-10-31 19:31:23,453 INFO L226 Difference]: Without dead ends: 1217 [2024-10-31 19:31:23,454 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2024-10-31 19:31:23,455 INFO L432 NwaCegarLoop]: 65 mSDtfsCounter, 152 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-31 19:31:23,455 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 163 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-31 19:31:23,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1217 states. [2024-10-31 19:31:23,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1217 to 709. [2024-10-31 19:31:23,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 709 states, 708 states have (on average 1.5296610169491525) internal successors, (1083), 708 states have internal predecessors, (1083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:31:23,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 709 states to 709 states and 1083 transitions. [2024-10-31 19:31:23,510 INFO L78 Accepts]: Start accepts. Automaton has 709 states and 1083 transitions. Word has length 26 [2024-10-31 19:31:23,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 19:31:23,510 INFO L471 AbstractCegarLoop]: Abstraction has 709 states and 1083 transitions. [2024-10-31 19:31:23,510 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:31:23,510 INFO L276 IsEmpty]: Start isEmpty. Operand 709 states and 1083 transitions. [2024-10-31 19:31:23,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-10-31 19:31:23,512 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 19:31:23,512 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 19:31:23,517 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (7)] Ended with exit code 0 [2024-10-31 19:31:23,713 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-10-31 19:31:23,713 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 19:31:23,714 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 19:31:23,714 INFO L85 PathProgramCache]: Analyzing trace with hash 179143916, now seen corresponding path program 1 times [2024-10-31 19:31:23,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 19:31:23,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [641933896] [2024-10-31 19:31:23,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 19:31:23,714 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-10-31 19:31:23,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-10-31 19:31:23,715 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-10-31 19:31:23,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2024-10-31 19:31:23,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 19:31:23,782 INFO L255 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-31 19:31:23,783 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 19:31:23,830 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 19:31:23,831 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 19:31:23,897 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 19:31:23,898 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 19:31:23,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [641933896] [2024-10-31 19:31:23,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [641933896] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 19:31:23,898 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 19:31:23,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2024-10-31 19:31:23,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636165270] [2024-10-31 19:31:23,898 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 19:31:23,899 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-31 19:31:23,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 19:31:23,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-31 19:31:23,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2024-10-31 19:31:23,900 INFO L87 Difference]: Start difference. First operand 709 states and 1083 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:31:24,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 19:31:24,342 INFO L93 Difference]: Finished difference Result 1959 states and 3058 transitions. [2024-10-31 19:31:24,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-31 19:31:24,343 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 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 28 [2024-10-31 19:31:24,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 19:31:24,349 INFO L225 Difference]: With dead ends: 1959 [2024-10-31 19:31:24,349 INFO L226 Difference]: Without dead ends: 1619 [2024-10-31 19:31:24,351 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2024-10-31 19:31:24,351 INFO L432 NwaCegarLoop]: 89 mSDtfsCounter, 448 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 448 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-31 19:31:24,352 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [448 Valid, 463 Invalid, 586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 554 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-31 19:31:24,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1619 states. [2024-10-31 19:31:24,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1619 to 1364. [2024-10-31 19:31:24,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1364 states, 1363 states have (on average 1.5238444607483492) internal successors, (2077), 1363 states have internal predecessors, (2077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:31:24,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1364 states to 1364 states and 2077 transitions. [2024-10-31 19:31:24,401 INFO L78 Accepts]: Start accepts. Automaton has 1364 states and 2077 transitions. Word has length 28 [2024-10-31 19:31:24,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 19:31:24,401 INFO L471 AbstractCegarLoop]: Abstraction has 1364 states and 2077 transitions. [2024-10-31 19:31:24,401 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:31:24,401 INFO L276 IsEmpty]: Start isEmpty. Operand 1364 states and 2077 transitions. [2024-10-31 19:31:24,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-10-31 19:31:24,403 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 19:31:24,403 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 19:31:24,407 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2024-10-31 19:31:24,603 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-10-31 19:31:24,604 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 19:31:24,604 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 19:31:24,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1961462321, now seen corresponding path program 1 times [2024-10-31 19:31:24,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 19:31:24,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [205844769] [2024-10-31 19:31:24,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 19:31:24,605 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-10-31 19:31:24,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-10-31 19:31:24,607 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-10-31 19:31:24,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2024-10-31 19:31:24,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 19:31:24,684 INFO L255 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-31 19:31:24,685 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 19:31:24,791 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 19:31:24,792 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 19:31:24,866 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 19:31:24,867 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 19:31:24,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [205844769] [2024-10-31 19:31:24,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [205844769] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 19:31:24,867 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 19:31:24,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2024-10-31 19:31:24,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988623885] [2024-10-31 19:31:24,867 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 19:31:24,868 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-31 19:31:24,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 19:31:24,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-31 19:31:24,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-10-31 19:31:24,869 INFO L87 Difference]: Start difference. First operand 1364 states and 2077 transitions. Second operand has 10 states, 10 states have (on average 5.3) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:31:25,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 19:31:25,469 INFO L93 Difference]: Finished difference Result 3109 states and 4745 transitions. [2024-10-31 19:31:25,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-10-31 19:31:25,470 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 10 states have internal predecessors, (53), 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 31 [2024-10-31 19:31:25,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 19:31:25,477 INFO L225 Difference]: With dead ends: 3109 [2024-10-31 19:31:25,477 INFO L226 Difference]: Without dead ends: 2251 [2024-10-31 19:31:25,479 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=220, Unknown=0, NotChecked=0, Total=342 [2024-10-31 19:31:25,479 INFO L432 NwaCegarLoop]: 45 mSDtfsCounter, 548 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 548 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-31 19:31:25,479 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [548 Valid, 203 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-31 19:31:25,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2251 states. [2024-10-31 19:31:25,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2251 to 1816. [2024-10-31 19:31:25,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1816 states, 1815 states have (on average 1.5228650137741047) internal successors, (2764), 1815 states have internal predecessors, (2764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:31:25,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1816 states to 1816 states and 2764 transitions. [2024-10-31 19:31:25,541 INFO L78 Accepts]: Start accepts. Automaton has 1816 states and 2764 transitions. Word has length 31 [2024-10-31 19:31:25,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 19:31:25,542 INFO L471 AbstractCegarLoop]: Abstraction has 1816 states and 2764 transitions. [2024-10-31 19:31:25,542 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:31:25,542 INFO L276 IsEmpty]: Start isEmpty. Operand 1816 states and 2764 transitions. [2024-10-31 19:31:25,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-10-31 19:31:25,543 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 19:31:25,543 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 19:31:25,546 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2024-10-31 19:31:25,743 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-10-31 19:31:25,744 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 19:31:25,744 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 19:31:25,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1135027793, now seen corresponding path program 1 times [2024-10-31 19:31:25,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 19:31:25,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1345233923] [2024-10-31 19:31:25,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 19:31:25,745 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-10-31 19:31:25,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-10-31 19:31:25,748 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-10-31 19:31:25,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2024-10-31 19:31:25,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 19:31:25,820 INFO L255 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-31 19:31:25,821 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 19:31:25,924 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 19:31:25,925 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 19:31:26,004 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 19:31:26,005 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 19:31:26,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1345233923] [2024-10-31 19:31:26,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1345233923] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 19:31:26,005 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 19:31:26,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2024-10-31 19:31:26,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842880264] [2024-10-31 19:31:26,005 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 19:31:26,006 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-31 19:31:26,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 19:31:26,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-31 19:31:26,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-10-31 19:31:26,007 INFO L87 Difference]: Start difference. First operand 1816 states and 2764 transitions. Second operand has 10 states, 10 states have (on average 5.8) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:31:26,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 19:31:26,548 INFO L93 Difference]: Finished difference Result 3572 states and 5451 transitions. [2024-10-31 19:31:26,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-31 19:31:26,548 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 10 states have internal predecessors, (58), 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 32 [2024-10-31 19:31:26,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 19:31:26,556 INFO L225 Difference]: With dead ends: 3572 [2024-10-31 19:31:26,556 INFO L226 Difference]: Without dead ends: 2166 [2024-10-31 19:31:26,594 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2024-10-31 19:31:26,595 INFO L432 NwaCegarLoop]: 57 mSDtfsCounter, 345 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 520 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-31 19:31:26,595 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [345 Valid, 280 Invalid, 585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 520 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-31 19:31:26,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2166 states. [2024-10-31 19:31:26,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2166 to 1861. [2024-10-31 19:31:26,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1861 states, 1860 states have (on average 1.4940860215053764) internal successors, (2779), 1860 states have internal predecessors, (2779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:31:26,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1861 states to 1861 states and 2779 transitions. [2024-10-31 19:31:26,658 INFO L78 Accepts]: Start accepts. Automaton has 1861 states and 2779 transitions. Word has length 32 [2024-10-31 19:31:26,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 19:31:26,658 INFO L471 AbstractCegarLoop]: Abstraction has 1861 states and 2779 transitions. [2024-10-31 19:31:26,659 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:31:26,659 INFO L276 IsEmpty]: Start isEmpty. Operand 1861 states and 2779 transitions. [2024-10-31 19:31:26,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-10-31 19:31:26,660 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 19:31:26,660 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 19:31:26,665 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2024-10-31 19:31:26,860 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-10-31 19:31:26,861 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 19:31:26,861 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 19:31:26,861 INFO L85 PathProgramCache]: Analyzing trace with hash -2055171256, now seen corresponding path program 1 times [2024-10-31 19:31:26,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 19:31:26,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1730303290] [2024-10-31 19:31:26,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 19:31:26,861 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-10-31 19:31:26,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-10-31 19:31:26,863 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-10-31 19:31:26,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2024-10-31 19:31:26,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 19:31:26,926 INFO L255 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-31 19:31:26,927 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 19:31:26,959 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 19:31:26,960 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 19:31:26,999 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 19:31:26,999 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 19:31:26,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1730303290] [2024-10-31 19:31:26,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1730303290] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 19:31:26,999 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 19:31:26,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2024-10-31 19:31:27,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651738096] [2024-10-31 19:31:27,000 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 19:31:27,000 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-31 19:31:27,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 19:31:27,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-31 19:31:27,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-10-31 19:31:27,001 INFO L87 Difference]: Start difference. First operand 1861 states and 2779 transitions. Second operand has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:31:27,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 19:31:27,272 INFO L93 Difference]: Finished difference Result 4145 states and 6389 transitions. [2024-10-31 19:31:27,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-31 19:31:27,273 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 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 33 [2024-10-31 19:31:27,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 19:31:27,283 INFO L225 Difference]: With dead ends: 4145 [2024-10-31 19:31:27,283 INFO L226 Difference]: Without dead ends: 2983 [2024-10-31 19:31:27,286 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-10-31 19:31:27,286 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 153 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-31 19:31:27,286 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 67 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-31 19:31:27,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2983 states. [2024-10-31 19:31:27,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2983 to 2492. [2024-10-31 19:31:27,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2492 states, 2491 states have (on average 1.5086310718586913) internal successors, (3758), 2491 states have internal predecessors, (3758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:31:27,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2492 states to 2492 states and 3758 transitions. [2024-10-31 19:31:27,371 INFO L78 Accepts]: Start accepts. Automaton has 2492 states and 3758 transitions. Word has length 33 [2024-10-31 19:31:27,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 19:31:27,371 INFO L471 AbstractCegarLoop]: Abstraction has 2492 states and 3758 transitions. [2024-10-31 19:31:27,371 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:31:27,372 INFO L276 IsEmpty]: Start isEmpty. Operand 2492 states and 3758 transitions. [2024-10-31 19:31:27,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-10-31 19:31:27,374 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 19:31:27,374 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 19:31:27,378 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (11)] Ended with exit code 0 [2024-10-31 19:31:27,574 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-10-31 19:31:27,575 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 19:31:27,575 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 19:31:27,575 INFO L85 PathProgramCache]: Analyzing trace with hash 945650591, now seen corresponding path program 1 times [2024-10-31 19:31:27,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 19:31:27,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1740966713] [2024-10-31 19:31:27,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 19:31:27,576 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-10-31 19:31:27,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-10-31 19:31:27,579 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-10-31 19:31:27,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2024-10-31 19:31:27,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 19:31:27,686 INFO L255 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-10-31 19:31:27,697 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 19:31:29,650 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-31 19:31:29,650 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 19:31:30,997 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-31 19:31:30,997 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 19:31:30,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1740966713] [2024-10-31 19:31:30,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1740966713] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 19:31:30,998 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 19:31:30,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2024-10-31 19:31:30,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253574837] [2024-10-31 19:31:30,998 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 19:31:30,998 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-10-31 19:31:30,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 19:31:30,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-10-31 19:31:30,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1242, Unknown=0, NotChecked=0, Total=1406 [2024-10-31 19:31:31,000 INFO L87 Difference]: Start difference. First operand 2492 states and 3758 transitions. Second operand has 38 states, 38 states have (on average 2.6315789473684212) internal successors, (100), 38 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:32:24,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 19:32:24,330 INFO L93 Difference]: Finished difference Result 15818 states and 23203 transitions. [2024-10-31 19:32:24,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 312 states. [2024-10-31 19:32:24,330 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.6315789473684212) internal successors, (100), 38 states have internal predecessors, (100), 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 51 [2024-10-31 19:32:24,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 19:32:24,381 INFO L225 Difference]: With dead ends: 15818 [2024-10-31 19:32:24,381 INFO L226 Difference]: Without dead ends: 15317 [2024-10-31 19:32:24,397 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 408 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 344 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48001 ImplicationChecksByTransitivity, 42.7s TimeCoverageRelationStatistics Valid=22394, Invalid=96976, Unknown=0, NotChecked=0, Total=119370 [2024-10-31 19:32:24,398 INFO L432 NwaCegarLoop]: 308 mSDtfsCounter, 2801 mSDsluCounter, 5547 mSDsCounter, 0 mSdLazyCounter, 12236 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2801 SdHoareTripleChecker+Valid, 5855 SdHoareTripleChecker+Invalid, 12387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 12236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.8s IncrementalHoareTripleChecker+Time [2024-10-31 19:32:24,398 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2801 Valid, 5855 Invalid, 12387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 12236 Invalid, 0 Unknown, 0 Unchecked, 10.8s Time] [2024-10-31 19:32:24,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15317 states. [2024-10-31 19:32:24,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15317 to 9320. [2024-10-31 19:32:24,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9320 states, 9319 states have (on average 1.4989805773151625) internal successors, (13969), 9319 states have internal predecessors, (13969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:32:24,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9320 states to 9320 states and 13969 transitions. [2024-10-31 19:32:24,973 INFO L78 Accepts]: Start accepts. Automaton has 9320 states and 13969 transitions. Word has length 51 [2024-10-31 19:32:24,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 19:32:24,973 INFO L471 AbstractCegarLoop]: Abstraction has 9320 states and 13969 transitions. [2024-10-31 19:32:24,974 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.6315789473684212) internal successors, (100), 38 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:32:24,974 INFO L276 IsEmpty]: Start isEmpty. Operand 9320 states and 13969 transitions. [2024-10-31 19:32:24,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-10-31 19:32:24,977 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 19:32:24,977 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 19:32:24,984 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (12)] Ended with exit code 0 [2024-10-31 19:32:25,178 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-10-31 19:32:25,178 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 19:32:25,178 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 19:32:25,178 INFO L85 PathProgramCache]: Analyzing trace with hash -65466659, now seen corresponding path program 1 times [2024-10-31 19:32:25,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 19:32:25,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [72693456] [2024-10-31 19:32:25,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 19:32:25,179 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-10-31 19:32:25,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-10-31 19:32:25,180 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-10-31 19:32:25,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2024-10-31 19:32:25,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 19:32:25,240 INFO L255 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-31 19:32:25,241 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 19:32:25,310 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-31 19:32:25,310 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 19:32:25,350 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-31 19:32:25,351 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 19:32:25,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [72693456] [2024-10-31 19:32:25,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [72693456] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 19:32:25,351 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 19:32:25,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 8 [2024-10-31 19:32:25,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743059410] [2024-10-31 19:32:25,351 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 19:32:25,351 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-31 19:32:25,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 19:32:25,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-31 19:32:25,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-10-31 19:32:25,352 INFO L87 Difference]: Start difference. First operand 9320 states and 13969 transitions. Second operand has 8 states, 8 states have (on average 6.75) internal successors, (54), 8 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) [2024-10-31 19:32:26,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 19:32:26,128 INFO L93 Difference]: Finished difference Result 18612 states and 27810 transitions. [2024-10-31 19:32:26,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-10-31 19:32:26,129 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 8 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) Word has length 51 [2024-10-31 19:32:26,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 19:32:26,197 INFO L225 Difference]: With dead ends: 18612 [2024-10-31 19:32:26,198 INFO L226 Difference]: Without dead ends: 9295 [2024-10-31 19:32:26,208 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 91 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2024-10-31 19:32:26,208 INFO L432 NwaCegarLoop]: 67 mSDtfsCounter, 347 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 1106 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 1137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-31 19:32:26,209 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [347 Valid, 338 Invalid, 1137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1106 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-31 19:32:26,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9295 states. [2024-10-31 19:32:26,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9295 to 7728. [2024-10-31 19:32:26,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7728 states, 7727 states have (on average 1.4233208230878738) internal successors, (10998), 7727 states have internal predecessors, (10998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:32:26,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7728 states to 7728 states and 10998 transitions. [2024-10-31 19:32:26,665 INFO L78 Accepts]: Start accepts. Automaton has 7728 states and 10998 transitions. Word has length 51 [2024-10-31 19:32:26,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 19:32:26,666 INFO L471 AbstractCegarLoop]: Abstraction has 7728 states and 10998 transitions. [2024-10-31 19:32:26,666 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 8 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) [2024-10-31 19:32:26,666 INFO L276 IsEmpty]: Start isEmpty. Operand 7728 states and 10998 transitions. [2024-10-31 19:32:26,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-10-31 19:32:26,669 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 19:32:26,669 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 19:32:26,672 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2024-10-31 19:32:26,869 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-10-31 19:32:26,870 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 19:32:26,871 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 19:32:26,871 INFO L85 PathProgramCache]: Analyzing trace with hash -1950719985, now seen corresponding path program 1 times [2024-10-31 19:32:26,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 19:32:26,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1561562424] [2024-10-31 19:32:26,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 19:32:26,872 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-10-31 19:32:26,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-10-31 19:32:26,874 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-10-31 19:32:26,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2024-10-31 19:32:26,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-31 19:32:26,956 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-31 19:32:27,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-31 19:32:27,048 INFO L130 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2024-10-31 19:32:27,048 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-31 19:32:27,049 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-10-31 19:32:27,053 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2024-10-31 19:32:27,250 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-10-31 19:32:27,253 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 19:32:27,315 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2024-10-31 19:32:27,317 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.10 07:32:27 BoogieIcfgContainer [2024-10-31 19:32:27,317 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-10-31 19:32:27,317 INFO L158 Benchmark]: Toolchain (without parser) took 68220.22ms. Allocated memory was 213.9MB in the beginning and 739.2MB in the end (delta: 525.3MB). Free memory was 189.3MB in the beginning and 250.5MB in the end (delta: -61.2MB). Peak memory consumption was 464.6MB. Max. memory is 8.0GB. [2024-10-31 19:32:27,318 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 213.9MB. Free memory was 190.6MB in the beginning and 190.5MB in the end (delta: 65.5kB). There was no memory consumed. Max. memory is 8.0GB. [2024-10-31 19:32:27,318 INFO L158 Benchmark]: CACSL2BoogieTranslator took 268.82ms. Allocated memory is still 213.9MB. Free memory was 189.3MB in the beginning and 174.5MB in the end (delta: 14.8MB). Peak memory consumption was 14.7MB. Max. memory is 8.0GB. [2024-10-31 19:32:27,318 INFO L158 Benchmark]: Boogie Procedure Inliner took 37.70ms. Allocated memory is still 213.9MB. Free memory was 174.5MB in the beginning and 172.5MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2024-10-31 19:32:27,318 INFO L158 Benchmark]: Boogie Preprocessor took 38.81ms. Allocated memory is still 213.9MB. Free memory was 172.5MB in the beginning and 170.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2024-10-31 19:32:27,318 INFO L158 Benchmark]: RCFGBuilder took 480.34ms. Allocated memory is still 213.9MB. Free memory was 170.4MB in the beginning and 152.6MB in the end (delta: 17.8MB). Peak memory consumption was 17.8MB. Max. memory is 8.0GB. [2024-10-31 19:32:27,319 INFO L158 Benchmark]: TraceAbstraction took 67388.38ms. Allocated memory was 213.9MB in the beginning and 739.2MB in the end (delta: 525.3MB). Free memory was 152.1MB in the beginning and 250.5MB in the end (delta: -98.4MB). Peak memory consumption was 427.9MB. Max. memory is 8.0GB. [2024-10-31 19:32:27,320 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 213.9MB. Free memory was 190.6MB in the beginning and 190.5MB in the end (delta: 65.5kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 268.82ms. Allocated memory is still 213.9MB. Free memory was 189.3MB in the beginning and 174.5MB in the end (delta: 14.8MB). Peak memory consumption was 14.7MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 37.70ms. Allocated memory is still 213.9MB. Free memory was 174.5MB in the beginning and 172.5MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 38.81ms. Allocated memory is still 213.9MB. Free memory was 172.5MB in the beginning and 170.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 480.34ms. Allocated memory is still 213.9MB. Free memory was 170.4MB in the beginning and 152.6MB in the end (delta: 17.8MB). Peak memory consumption was 17.8MB. Max. memory is 8.0GB. * TraceAbstraction took 67388.38ms. Allocated memory was 213.9MB in the beginning and 739.2MB in the end (delta: 525.3MB). Free memory was 152.1MB in the beginning and 250.5MB in the end (delta: -98.4MB). Peak memory consumption was 427.9MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 25]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L124] unsigned int a, b, r; [L126] a = __VERIFIER_nondet_uint() [L127] b = __VERIFIER_nondet_uint() [L129] CALL, EXPR mp_add(a, b) [L42] unsigned char a0, a1, a2, a3; [L43] unsigned char b0, b1, b2, b3; [L44] unsigned char r0, r1, r2, r3; [L45] unsigned short carry; [L46] unsigned short partial_sum; [L47] unsigned int r; [L48] unsigned char i; [L49] unsigned char na, nb; [L50] a0 = a [L51] a1 = a >> 8 [L52] a2 = a >> 16U [L53] a3 = a >> 24U [L54] b0 = b [L55] b1 = b >> 8U [L56] b2 = b >> 16U [L57] b3 = b >> 24U [L58] na = (unsigned char)4 VAL [a0=85, a1=0, a2=0, a3=0, b0=-86, b1=0, b2=0, b3=0, na=4] [L59] COND TRUE a3 == (unsigned char)0 [L60] na = na - 1 VAL [a0=85, a1=0, a2=0, a3=0, b0=-86, b1=0, b2=0, b3=0, na=3] [L61] COND TRUE a2 == (unsigned char)0 [L62] na = na - 1 VAL [a0=85, a1=0, a2=0, a3=0, b0=-86, b1=0, b2=0, b3=0, na=2] [L63] COND TRUE a1 == (unsigned char)0 [L64] na = na - 1 VAL [a0=85, a1=0, a2=0, a3=0, b0=-86, b1=0, b2=0, b3=0, na=1] [L68] nb = (unsigned char)4 VAL [a0=85, a1=0, a2=0, a3=0, b0=-86, b1=0, b2=0, b3=0, na=1, nb=4] [L69] COND TRUE b3 == (unsigned char)0 [L70] nb = nb - 1 VAL [a0=85, a1=0, a2=0, a3=0, b0=-86, b1=0, b2=0, b3=0, na=1, nb=3] [L71] COND TRUE b2 == (unsigned char)0 [L72] nb = nb - 1 VAL [a0=85, a1=0, a2=0, a3=0, b0=-86, b1=0, b2=0, b3=0, na=1, nb=2] [L73] COND TRUE b1 == (unsigned char)0 [L74] nb = nb - 1 VAL [a0=85, a1=0, a2=0, a3=0, b0=-86, b1=0, b2=0, b3=0, na=1, nb=1] [L78] carry = (unsigned short)0 [L79] i = (unsigned char)0 VAL [a0=85, a1=0, a2=0, a3=0, b0=-86, b1=0, b2=0, b3=0, carry=0, i=0, na=1, nb=1] [L80] COND TRUE (i < na) || (i < nb) || (carry != (unsigned short)0) [L81] partial_sum = carry [L82] carry = (unsigned short)0 VAL [a0=85, a1=0, a2=0, a3=0, b0=-86, b1=0, b2=0, b3=0, carry=0, i=0, na=1, nb=1, partial_sum=0] [L83] COND TRUE i < na VAL [a0=85, a1=0, a2=0, a3=0, b0=-86, b1=0, b2=0, b3=0, carry=0, i=0, na=1, nb=1, partial_sum=0] [L84] COND TRUE i == (unsigned char)0 [L84] partial_sum = partial_sum + a0 VAL [a0=85, a1=0, a2=0, a3=0, b0=-86, b1=0, b2=0, b3=0, carry=0, i=0, na=1, nb=1, partial_sum=85] [L85] COND FALSE !(i == (unsigned char)1) VAL [a0=85, a1=0, a2=0, a3=0, b0=-86, b1=0, b2=0, b3=0, carry=0, i=0, na=1, nb=1, partial_sum=85] [L86] COND FALSE !(i == (unsigned char)2) VAL [a0=85, a1=0, a2=0, a3=0, b0=-86, b1=0, b2=0, b3=0, carry=0, i=0, na=1, nb=1, partial_sum=85] [L87] COND FALSE !(i == (unsigned char)3) VAL [a0=85, a1=0, a2=0, a3=0, b0=-86, b1=0, b2=0, b3=0, carry=0, i=0, na=1, nb=1, partial_sum=85] [L89] COND TRUE i < nb VAL [a0=85, a1=0, a2=0, a3=0, b0=-86, b1=0, b2=0, b3=0, carry=0, i=0, na=1, nb=1, partial_sum=85] [L90] COND TRUE i == (unsigned char)0 [L90] partial_sum = partial_sum + b0 VAL [a0=85, a1=0, a2=0, a3=0, b0=-86, b1=0, b2=0, b3=0, carry=0, i=0, na=1, nb=1, partial_sum=255] [L91] COND FALSE !(i == (unsigned char)1) VAL [a0=85, a1=0, a2=0, a3=0, b0=-86, b1=0, b2=0, b3=0, carry=0, i=0, na=1, nb=1, partial_sum=255] [L92] COND FALSE !(i == (unsigned char)2) VAL [a0=85, a1=0, a2=0, a3=0, b0=-86, b1=0, b2=0, b3=0, carry=0, i=0, na=1, nb=1, partial_sum=255] [L93] COND FALSE !(i == (unsigned char)3) VAL [a0=85, a1=0, a2=0, a3=0, b0=-86, b1=0, b2=0, b3=0, carry=0, i=0, na=1, nb=1, partial_sum=255] [L95] COND TRUE partial_sum > ((unsigned char)254) [L96] partial_sum = partial_sum & ((unsigned char)255) [L97] carry = (unsigned short)1 VAL [a0=85, a1=0, a2=0, a3=0, b0=-86, b1=0, b2=0, b3=0, carry=1, i=0, na=1, nb=1, partial_sum=255] [L99] COND TRUE i == (unsigned char)0 [L99] r0 = (unsigned char)partial_sum VAL [a0=85, a1=0, a2=0, a3=0, b0=-86, b1=0, b2=0, b3=0, carry=1, i=0, na=1, nb=1, partial_sum=255, r0=-1] [L100] COND FALSE !(i == (unsigned char)1) VAL [a0=85, a1=0, a2=0, a3=0, b0=-86, b1=0, b2=0, b3=0, carry=1, i=0, na=1, nb=1, partial_sum=255, r0=-1] [L101] COND FALSE !(i == (unsigned char)2) VAL [a0=85, a1=0, a2=0, a3=0, b0=-86, b1=0, b2=0, b3=0, carry=1, i=0, na=1, nb=1, partial_sum=255, r0=-1] [L102] COND FALSE !(i == (unsigned char)3) VAL [a0=85, a1=0, a2=0, a3=0, b0=-86, b1=0, b2=0, b3=0, carry=1, i=0, na=1, nb=1, partial_sum=255, r0=-1] [L104] i = i + (unsigned char)1 VAL [a0=85, a1=0, a2=0, a3=0, b0=-86, b1=0, b2=0, b3=0, carry=1, i=1, na=1, nb=1, partial_sum=255, r0=-1] [L80] COND TRUE (i < na) || (i < nb) || (carry != (unsigned short)0) [L81] partial_sum = carry [L82] carry = (unsigned short)0 VAL [a0=85, a1=0, a2=0, a3=0, b0=-86, b1=0, b2=0, b3=0, carry=0, i=1, na=1, nb=1, partial_sum=1, r0=-1] [L83] COND FALSE !(i < na) VAL [a0=85, a1=0, a2=0, a3=0, b0=-86, b1=0, b2=0, b3=0, carry=0, i=1, na=1, nb=1, partial_sum=1, r0=-1] [L89] COND FALSE !(i < nb) VAL [a0=85, a1=0, a2=0, a3=0, b0=-86, b1=0, b2=0, b3=0, carry=0, i=1, na=1, nb=1, partial_sum=1, r0=-1] [L95] COND FALSE !(partial_sum > ((unsigned char)254)) VAL [a0=85, a1=0, a2=0, a3=0, b0=-86, b1=0, b2=0, b3=0, carry=0, i=1, na=1, nb=1, partial_sum=1, r0=-1] [L99] COND FALSE !(i == (unsigned char)0) VAL [a0=85, a1=0, a2=0, a3=0, b0=-86, b1=0, b2=0, b3=0, carry=0, i=1, na=1, nb=1, partial_sum=1, r0=-1] [L100] COND TRUE i == (unsigned char)1 [L100] r1 = (unsigned char)partial_sum VAL [a0=85, a1=0, a2=0, a3=0, b0=-86, b1=0, b2=0, b3=0, carry=0, i=1, na=1, nb=1, partial_sum=1, r0=-1, r1=1] [L101] COND FALSE !(i == (unsigned char)2) VAL [a0=85, a1=0, a2=0, a3=0, b0=-86, b1=0, b2=0, b3=0, carry=0, i=1, na=1, nb=1, partial_sum=1, r0=-1, r1=1] [L102] COND FALSE !(i == (unsigned char)3) VAL [a0=85, a1=0, a2=0, a3=0, b0=-86, b1=0, b2=0, b3=0, carry=0, i=1, na=1, nb=1, partial_sum=1, r0=-1, r1=1] [L104] i = i + (unsigned char)1 VAL [a0=85, a1=0, a2=0, a3=0, b0=-86, b1=0, b2=0, b3=0, carry=0, i=2, na=1, nb=1, partial_sum=1, r0=-1, r1=1] [L80] COND FALSE !((i < na) || (i < nb) || (carry != (unsigned short)0)) VAL [a0=85, a1=0, a2=0, a3=0, b0=-86, b1=0, b2=0, b3=0, i=2, partial_sum=1, r0=-1, r1=1] [L107] COND TRUE i < (unsigned char)4 VAL [a0=85, a1=0, a2=0, a3=0, b0=-86, b1=0, b2=0, b3=0, i=2, partial_sum=1, r0=-1, r1=1] [L108] COND FALSE !(i == (unsigned char)0) VAL [a0=85, a1=0, a2=0, a3=0, b0=-86, b1=0, b2=0, b3=0, i=2, partial_sum=1, r0=-1, r1=1] [L109] COND FALSE !(i == (unsigned char)1) VAL [a0=85, a1=0, a2=0, a3=0, b0=-86, b1=0, b2=0, b3=0, i=2, partial_sum=1, r0=-1, r1=1] [L110] COND TRUE i == (unsigned char)2 [L110] r2 = (unsigned char)0 VAL [a0=85, a1=0, a2=0, a3=0, b0=-86, b1=0, b2=0, b3=0, i=2, partial_sum=1, r0=-1, r1=1, r2=0] [L111] COND FALSE !(i == (unsigned char)3) VAL [a0=85, a1=0, a2=0, a3=0, b0=-86, b1=0, b2=0, b3=0, i=2, partial_sum=1, r0=-1, r1=1, r2=0] [L113] i = i + (unsigned char)1 VAL [a0=85, a1=0, a2=0, a3=0, b0=-86, b1=0, b2=0, b3=0, i=3, partial_sum=1, r0=-1, r1=1, r2=0] [L107] COND TRUE i < (unsigned char)4 VAL [a0=85, a1=0, a2=0, a3=0, b0=-86, b1=0, b2=0, b3=0, i=3, partial_sum=1, r0=-1, r1=1, r2=0] [L108] COND FALSE !(i == (unsigned char)0) VAL [a0=85, a1=0, a2=0, a3=0, b0=-86, b1=0, b2=0, b3=0, i=3, partial_sum=1, r0=-1, r1=1, r2=0] [L109] COND FALSE !(i == (unsigned char)1) VAL [a0=85, a1=0, a2=0, a3=0, b0=-86, b1=0, b2=0, b3=0, i=3, partial_sum=1, r0=-1, r1=1, r2=0] [L110] COND FALSE !(i == (unsigned char)2) VAL [a0=85, a1=0, a2=0, a3=0, b0=-86, b1=0, b2=0, b3=0, i=3, partial_sum=1, r0=-1, r1=1, r2=0] [L111] COND TRUE i == (unsigned char)3 [L111] r3 = (unsigned char)0 VAL [a0=85, a1=0, a2=0, a3=0, b0=-86, b1=0, b2=0, b3=0, i=3, partial_sum=1, r0=-1, r1=1, r2=0, r3=0] [L113] i = i + (unsigned char)1 VAL [a0=85, a1=0, a2=0, a3=0, b0=-86, b1=0, b2=0, b3=0, i=4, partial_sum=1, r0=-1, r1=1, r2=0, r3=0] [L107] COND FALSE !(i < (unsigned char)4) VAL [a0=85, a1=0, a2=0, a3=0, b0=-86, b1=0, b2=0, b3=0, partial_sum=1, r0=-1, r1=1, r2=0, r3=0] [L116] r = r0 | (r1 << 8U) | (r2 << 16U) | ((unsigned int)r3 << 24U) [L118] return r; VAL [\result=511, a0=85, a1=0, a2=0, a3=0, b0=-86, b1=0, b2=0, b3=0, partial_sum=1] [L129] RET, EXPR mp_add(a, b) [L129] r = mp_add(a, b) [L131] CALL __VERIFIER_assert(r == a + b) [L24] COND TRUE !(cond) [L25] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 42 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 67.3s, OverallIterations: 13, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 57.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 5798 SdHoareTripleChecker+Valid, 13.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 5798 mSDsluCounter, 7942 SdHoareTripleChecker+Invalid, 11.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 7040 mSDsCounter, 594 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 15986 IncrementalHoareTripleChecker+Invalid, 16580 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 594 mSolverCounterUnsat, 902 mSDtfsCounter, 15986 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1005 GetRequests, 565 SyntacticMatches, 3 SemanticMatches, 437 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48191 ImplicationChecksByTransitivity, 43.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=9320occurred in iteration=11, InterpolantAutomatonStates: 412, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.4s AutomataMinimizationTime, 12 MinimizatonAttempts, 9653 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 4.4s InterpolantComputationTime, 396 NumberOfCodeBlocks, 396 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 660 ConstructedInterpolants, 0 QuantifiedInterpolants, 5821 SizeOfPredicates, 13 NumberOfNonLiveVariables, 751 ConjunctsInSsa, 80 ConjunctsInUnsatCore, 24 InterpolantComputations, 14 PerfectInterpolantSequences, 65/102 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2024-10-31 19:32:27,346 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...