/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/s3_srvr_3a.BV.c.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.5-dev-356b6ba-m [2024-10-31 19:32:43,506 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-31 19:32:43,579 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 19:32:43,584 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-31 19:32:43,585 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-31 19:32:43,633 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-31 19:32:43,633 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-31 19:32:43,634 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-31 19:32:43,637 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-31 19:32:43,638 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-31 19:32:43,639 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-31 19:32:43,639 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-31 19:32:43,639 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-31 19:32:43,640 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-31 19:32:43,640 INFO L153 SettingsManager]: * Use SBE=true [2024-10-31 19:32:43,640 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-31 19:32:43,641 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-31 19:32:43,643 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-31 19:32:43,643 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-31 19:32:43,643 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-31 19:32:43,644 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-31 19:32:43,644 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-31 19:32:43,644 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-31 19:32:43,645 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-31 19:32:43,645 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-10-31 19:32:43,645 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-31 19:32:43,645 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-10-31 19:32:43,646 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-31 19:32:43,646 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-31 19:32:43,647 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-31 19:32:43,647 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-31 19:32:43,648 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-31 19:32:43,648 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-31 19:32:43,648 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-31 19:32:43,648 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 19:32:43,649 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-31 19:32:43,649 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-31 19:32:43,649 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-31 19:32:43,649 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2024-10-31 19:32:43,649 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-10-31 19:32:43,650 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-31 19:32:43,650 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-31 19:32:43,650 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-31 19:32:43,650 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-31 19:32:43,650 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2024-10-31 19:32:43,651 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Allow undefined functions -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Command for external solver -> cvc4 --incremental --print-success --lang smt [2024-10-31 19:32:43,947 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-31 19:32:43,965 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-31 19:32:43,969 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-31 19:32:43,970 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-31 19:32:43,971 INFO L274 PluginConnector]: CDTParser initialized [2024-10-31 19:32:43,972 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/s3_srvr_3a.BV.c.cil.c [2024-10-31 19:32:45,373 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-31 19:32:45,576 INFO L384 CDTParser]: Found 1 translation units. [2024-10-31 19:32:45,577 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/bitvector/s3_srvr_3a.BV.c.cil.c [2024-10-31 19:32:45,593 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5bfb65e9e/e8202b3fe75e4846b486b1142dd130bf/FLAG40dfa06bc [2024-10-31 19:32:45,613 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5bfb65e9e/e8202b3fe75e4846b486b1142dd130bf [2024-10-31 19:32:45,615 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-31 19:32:45,617 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-10-31 19:32:45,620 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-31 19:32:45,620 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-31 19:32:45,624 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-31 19:32:45,625 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 07:32:45" (1/1) ... [2024-10-31 19:32:45,626 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36535ad0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 07:32:45, skipping insertion in model container [2024-10-31 19:32:45,626 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 07:32:45" (1/1) ... [2024-10-31 19:32:45,674 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-31 19:32:45,924 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/s3_srvr_3a.BV.c.cil.c[44494,44507] [2024-10-31 19:32:45,933 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 19:32:45,945 INFO L200 MainTranslator]: Completed pre-run [2024-10-31 19:32:45,985 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/s3_srvr_3a.BV.c.cil.c[44494,44507] [2024-10-31 19:32:45,993 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 19:32:46,013 INFO L204 MainTranslator]: Completed translation [2024-10-31 19:32:46,014 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 07:32:46 WrapperNode [2024-10-31 19:32:46,014 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-31 19:32:46,015 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-31 19:32:46,015 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-31 19:32:46,015 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-31 19:32:46,020 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 07:32:46" (1/1) ... [2024-10-31 19:32:46,028 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 07:32:46" (1/1) ... [2024-10-31 19:32:46,060 INFO L138 Inliner]: procedures = 15, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 511 [2024-10-31 19:32:46,060 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-31 19:32:46,061 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-31 19:32:46,061 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-31 19:32:46,061 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-31 19:32:46,073 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 07:32:46" (1/1) ... [2024-10-31 19:32:46,074 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 07:32:46" (1/1) ... [2024-10-31 19:32:46,078 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 07:32:46" (1/1) ... [2024-10-31 19:32:46,097 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 19:32:46,098 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 07:32:46" (1/1) ... [2024-10-31 19:32:46,098 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 07:32:46" (1/1) ... [2024-10-31 19:32:46,106 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 07:32:46" (1/1) ... [2024-10-31 19:32:46,115 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 07:32:46" (1/1) ... [2024-10-31 19:32:46,118 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 07:32:46" (1/1) ... [2024-10-31 19:32:46,120 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 07:32:46" (1/1) ... [2024-10-31 19:32:46,123 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-31 19:32:46,127 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-31 19:32:46,127 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-31 19:32:46,128 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-31 19:32:46,128 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 07:32:46" (1/1) ... [2024-10-31 19:32:46,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 19:32:46,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-31 19:32:46,159 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 19:32:46,164 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 19:32:46,189 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-31 19:32:46,189 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-10-31 19:32:46,189 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-31 19:32:46,190 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-31 19:32:46,279 INFO L238 CfgBuilder]: Building ICFG [2024-10-31 19:32:46,281 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-31 19:32:46,303 WARN L781 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2024-10-31 19:32:46,901 INFO L735 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2024-10-31 19:32:46,901 INFO L735 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2024-10-31 19:32:46,940 INFO L? ?]: Removed 117 outVars from TransFormulas that were not future-live. [2024-10-31 19:32:46,941 INFO L287 CfgBuilder]: Performing block encoding [2024-10-31 19:32:46,955 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-31 19:32:46,955 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-10-31 19:32:46,955 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 07:32:46 BoogieIcfgContainer [2024-10-31 19:32:46,955 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-31 19:32:46,957 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-31 19:32:46,957 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-31 19:32:46,960 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-31 19:32:46,961 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.10 07:32:45" (1/3) ... [2024-10-31 19:32:46,962 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@590d3e10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 07:32:46, skipping insertion in model container [2024-10-31 19:32:46,962 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 07:32:46" (2/3) ... [2024-10-31 19:32:46,962 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@590d3e10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 07:32:46, skipping insertion in model container [2024-10-31 19:32:46,962 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 07:32:46" (3/3) ... [2024-10-31 19:32:46,964 INFO L112 eAbstractionObserver]: Analyzing ICFG s3_srvr_3a.BV.c.cil.c [2024-10-31 19:32:46,982 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-31 19:32:46,982 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-31 19:32:47,045 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-31 19:32:47,052 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;@1691eb38, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-31 19:32:47,052 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-31 19:32:47,058 INFO L276 IsEmpty]: Start isEmpty. Operand has 138 states, 136 states have (on average 1.7426470588235294) internal successors, (237), 137 states have internal predecessors, (237), 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 19:32:47,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-10-31 19:32:47,067 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 19:32:47,069 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 19:32:47,069 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 19:32:47,074 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 19:32:47,075 INFO L85 PathProgramCache]: Analyzing trace with hash 1632003015, now seen corresponding path program 1 times [2024-10-31 19:32:47,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 19:32:47,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [227466429] [2024-10-31 19:32:47,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 19:32:47,085 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-10-31 19:32:47,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-10-31 19:32:47,088 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 19:32:47,091 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 19:32:47,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 19:32:47,222 INFO L255 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-31 19:32:47,229 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 19:32:47,316 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 19:32:47,316 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 19:32:47,366 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 19:32:47,367 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 19:32:47,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [227466429] [2024-10-31 19:32:47,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [227466429] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 19:32:47,368 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 19:32:47,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2024-10-31 19:32:47,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925335471] [2024-10-31 19:32:47,371 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 19:32:47,376 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 19:32:47,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 19:32:47,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 19:32:47,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 19:32:47,407 INFO L87 Difference]: Start difference. First operand has 138 states, 136 states have (on average 1.7426470588235294) internal successors, (237), 137 states have internal predecessors, (237), 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 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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 19:32:47,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 19:32:47,664 INFO L93 Difference]: Finished difference Result 275 states and 473 transitions. [2024-10-31 19:32:47,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 19:32:47,667 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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 44 [2024-10-31 19:32:47,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 19:32:47,678 INFO L225 Difference]: With dead ends: 275 [2024-10-31 19:32:47,678 INFO L226 Difference]: Without dead ends: 125 [2024-10-31 19:32:47,682 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 19:32:47,686 INFO L432 NwaCegarLoop]: 211 mSDtfsCounter, 8 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-31 19:32:47,688 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 324 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-31 19:32:47,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2024-10-31 19:32:47,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2024-10-31 19:32:47,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.4919354838709677) internal successors, (185), 124 states have internal predecessors, (185), 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 19:32:47,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 185 transitions. [2024-10-31 19:32:47,733 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 185 transitions. Word has length 44 [2024-10-31 19:32:47,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 19:32:47,734 INFO L471 AbstractCegarLoop]: Abstraction has 125 states and 185 transitions. [2024-10-31 19:32:47,734 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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 19:32:47,734 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 185 transitions. [2024-10-31 19:32:47,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-10-31 19:32:47,736 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 19:32:47,736 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 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, 1, 1] [2024-10-31 19:32:47,741 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (2)] Forceful destruction successful, exit code 0 [2024-10-31 19:32:47,938 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 19:32:47,939 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 19:32:47,939 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 19:32:47,939 INFO L85 PathProgramCache]: Analyzing trace with hash -1722912794, now seen corresponding path program 1 times [2024-10-31 19:32:47,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 19:32:47,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1508319768] [2024-10-31 19:32:47,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 19:32:47,940 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-10-31 19:32:47,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-10-31 19:32:47,958 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 19:32:47,960 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 19:32:48,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 19:32:48,061 INFO L255 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-31 19:32:48,063 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 19:32:48,116 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 19:32:48,116 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 19:32:48,153 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 19:32:48,153 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 19:32:48,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1508319768] [2024-10-31 19:32:48,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1508319768] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 19:32:48,154 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 19:32:48,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2024-10-31 19:32:48,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045136744] [2024-10-31 19:32:48,154 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 19:32:48,155 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 19:32:48,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 19:32:48,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 19:32:48,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 19:32:48,157 INFO L87 Difference]: Start difference. First operand 125 states and 185 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 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 19:32:48,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 19:32:48,336 INFO L93 Difference]: Finished difference Result 252 states and 380 transitions. [2024-10-31 19:32:48,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 19:32:48,337 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 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 60 [2024-10-31 19:32:48,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 19:32:48,339 INFO L225 Difference]: With dead ends: 252 [2024-10-31 19:32:48,339 INFO L226 Difference]: Without dead ends: 146 [2024-10-31 19:32:48,340 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 19:32:48,341 INFO L432 NwaCegarLoop]: 169 mSDtfsCounter, 9 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-31 19:32:48,343 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 255 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-31 19:32:48,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2024-10-31 19:32:48,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2024-10-31 19:32:48,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 1.4551724137931035) internal successors, (211), 145 states have internal predecessors, (211), 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 19:32:48,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 211 transitions. [2024-10-31 19:32:48,356 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 211 transitions. Word has length 60 [2024-10-31 19:32:48,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 19:32:48,357 INFO L471 AbstractCegarLoop]: Abstraction has 146 states and 211 transitions. [2024-10-31 19:32:48,359 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 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 19:32:48,359 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 211 transitions. [2024-10-31 19:32:48,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2024-10-31 19:32:48,363 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 19:32:48,363 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1] [2024-10-31 19:32:48,369 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 19:32:48,563 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 19:32:48,564 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 19:32:48,564 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 19:32:48,565 INFO L85 PathProgramCache]: Analyzing trace with hash -1797387181, now seen corresponding path program 1 times [2024-10-31 19:32:48,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 19:32:48,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1921246809] [2024-10-31 19:32:48,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 19:32:48,565 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-10-31 19:32:48,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-10-31 19:32:48,568 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 19:32:48,570 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 19:32:48,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 19:32:48,688 INFO L255 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-31 19:32:48,692 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 19:32:48,755 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-10-31 19:32:48,755 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 19:32:48,805 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-10-31 19:32:48,805 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 19:32:48,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1921246809] [2024-10-31 19:32:48,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1921246809] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 19:32:48,806 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 19:32:48,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2024-10-31 19:32:48,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509728971] [2024-10-31 19:32:48,808 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 19:32:48,809 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 19:32:48,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 19:32:48,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 19:32:48,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 19:32:48,810 INFO L87 Difference]: Start difference. First operand 146 states and 211 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 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 19:32:48,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 19:32:48,970 INFO L93 Difference]: Finished difference Result 297 states and 437 transitions. [2024-10-31 19:32:48,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 19:32:48,971 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 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) Word has length 81 [2024-10-31 19:32:48,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 19:32:48,973 INFO L225 Difference]: With dead ends: 297 [2024-10-31 19:32:48,973 INFO L226 Difference]: Without dead ends: 170 [2024-10-31 19:32:48,973 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 19:32:48,975 INFO L432 NwaCegarLoop]: 182 mSDtfsCounter, 9 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 19:32:48,975 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 268 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 19:32:48,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2024-10-31 19:32:48,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2024-10-31 19:32:48,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 1.4201183431952662) internal successors, (240), 169 states have internal predecessors, (240), 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 19:32:48,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 240 transitions. [2024-10-31 19:32:48,984 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 240 transitions. Word has length 81 [2024-10-31 19:32:48,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 19:32:48,985 INFO L471 AbstractCegarLoop]: Abstraction has 170 states and 240 transitions. [2024-10-31 19:32:48,985 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 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 19:32:48,985 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 240 transitions. [2024-10-31 19:32:48,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2024-10-31 19:32:48,991 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 19:32:48,992 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1] [2024-10-31 19:32:48,998 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (4)] Forceful destruction successful, exit code 0 [2024-10-31 19:32:49,192 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-10-31 19:32:49,193 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 19:32:49,193 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 19:32:49,193 INFO L85 PathProgramCache]: Analyzing trace with hash -2045533675, now seen corresponding path program 1 times [2024-10-31 19:32:49,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 19:32:49,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [316940087] [2024-10-31 19:32:49,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 19:32:49,194 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-10-31 19:32:49,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-10-31 19:32:49,197 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-10-31 19:32:49,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2024-10-31 19:32:49,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 19:32:49,289 INFO L255 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-31 19:32:49,292 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 19:32:49,393 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-10-31 19:32:49,394 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 19:32:49,475 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-10-31 19:32:49,476 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 19:32:49,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [316940087] [2024-10-31 19:32:49,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [316940087] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 19:32:49,476 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 19:32:49,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2024-10-31 19:32:49,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002302050] [2024-10-31 19:32:49,477 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 19:32:49,477 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 19:32:49,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 19:32:49,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 19:32:49,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 19:32:49,479 INFO L87 Difference]: Start difference. First operand 170 states and 240 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 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 19:32:49,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 19:32:49,650 INFO L93 Difference]: Finished difference Result 362 states and 529 transitions. [2024-10-31 19:32:49,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 19:32:49,651 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 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) Word has length 81 [2024-10-31 19:32:49,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 19:32:49,652 INFO L225 Difference]: With dead ends: 362 [2024-10-31 19:32:49,653 INFO L226 Difference]: Without dead ends: 211 [2024-10-31 19:32:49,653 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 19:32:49,654 INFO L432 NwaCegarLoop]: 169 mSDtfsCounter, 10 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-31 19:32:49,655 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 255 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-31 19:32:49,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2024-10-31 19:32:49,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2024-10-31 19:32:49,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 1.361904761904762) internal successors, (286), 210 states have internal predecessors, (286), 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 19:32:49,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 286 transitions. [2024-10-31 19:32:49,666 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 286 transitions. Word has length 81 [2024-10-31 19:32:49,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 19:32:49,666 INFO L471 AbstractCegarLoop]: Abstraction has 211 states and 286 transitions. [2024-10-31 19:32:49,666 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 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 19:32:49,666 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 286 transitions. [2024-10-31 19:32:49,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2024-10-31 19:32:49,668 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 19:32:49,669 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 19:32:49,673 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 19:32:49,869 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 19:32:49,869 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 19:32:49,870 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 19:32:49,870 INFO L85 PathProgramCache]: Analyzing trace with hash 755662145, now seen corresponding path program 1 times [2024-10-31 19:32:49,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 19:32:49,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [254726848] [2024-10-31 19:32:49,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 19:32:49,871 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-10-31 19:32:49,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-10-31 19:32:49,872 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 19:32:49,874 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 19:32:49,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 19:32:49,967 INFO L255 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-31 19:32:49,969 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 19:32:50,013 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2024-10-31 19:32:50,014 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 19:32:50,057 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2024-10-31 19:32:50,058 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 19:32:50,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [254726848] [2024-10-31 19:32:50,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [254726848] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 19:32:50,058 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 19:32:50,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2024-10-31 19:32:50,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989092557] [2024-10-31 19:32:50,058 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 19:32:50,059 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 19:32:50,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 19:32:50,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 19:32:50,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 19:32:50,060 INFO L87 Difference]: Start difference. First operand 211 states and 286 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 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 19:32:50,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 19:32:50,224 INFO L93 Difference]: Finished difference Result 428 states and 590 transitions. [2024-10-31 19:32:50,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 19:32:50,224 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 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 101 [2024-10-31 19:32:50,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 19:32:50,226 INFO L225 Difference]: With dead ends: 428 [2024-10-31 19:32:50,226 INFO L226 Difference]: Without dead ends: 236 [2024-10-31 19:32:50,227 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 19:32:50,227 INFO L432 NwaCegarLoop]: 184 mSDtfsCounter, 9 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-31 19:32:50,228 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 270 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-31 19:32:50,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2024-10-31 19:32:50,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 236. [2024-10-31 19:32:50,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 1.3446808510638297) internal successors, (316), 235 states have internal predecessors, (316), 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 19:32:50,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 316 transitions. [2024-10-31 19:32:50,241 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 316 transitions. Word has length 101 [2024-10-31 19:32:50,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 19:32:50,241 INFO L471 AbstractCegarLoop]: Abstraction has 236 states and 316 transitions. [2024-10-31 19:32:50,241 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 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 19:32:50,241 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 316 transitions. [2024-10-31 19:32:50,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2024-10-31 19:32:50,242 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 19:32:50,243 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2024-10-31 19:32:50,249 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 19:32:50,443 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 19:32:50,443 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 19:32:50,444 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 19:32:50,444 INFO L85 PathProgramCache]: Analyzing trace with hash -687746511, now seen corresponding path program 1 times [2024-10-31 19:32:50,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 19:32:50,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1390695362] [2024-10-31 19:32:50,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 19:32:50,445 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-10-31 19:32:50,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-10-31 19:32:50,446 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 19:32:50,447 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 19:32:50,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 19:32:50,545 INFO L255 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-31 19:32:50,548 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 19:32:50,623 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-10-31 19:32:50,623 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 19:32:50,692 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-10-31 19:32:50,692 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 19:32:50,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1390695362] [2024-10-31 19:32:50,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1390695362] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 19:32:50,692 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 19:32:50,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2024-10-31 19:32:50,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931549770] [2024-10-31 19:32:50,693 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 19:32:50,693 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 19:32:50,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 19:32:50,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 19:32:50,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 19:32:50,694 INFO L87 Difference]: Start difference. First operand 236 states and 316 transitions. Second operand has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 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 19:32:50,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 19:32:50,754 INFO L93 Difference]: Finished difference Result 666 states and 899 transitions. [2024-10-31 19:32:50,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 19:32:50,755 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 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 121 [2024-10-31 19:32:50,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 19:32:50,756 INFO L225 Difference]: With dead ends: 666 [2024-10-31 19:32:50,756 INFO L226 Difference]: Without dead ends: 449 [2024-10-31 19:32:50,757 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 239 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 19:32:50,758 INFO L432 NwaCegarLoop]: 270 mSDtfsCounter, 113 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 433 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 19:32:50,758 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 433 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 19:32:50,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2024-10-31 19:32:50,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 449. [2024-10-31 19:32:50,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 448 states have (on average 1.3415178571428572) internal successors, (601), 448 states have internal predecessors, (601), 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 19:32:50,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 601 transitions. [2024-10-31 19:32:50,780 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 601 transitions. Word has length 121 [2024-10-31 19:32:50,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 19:32:50,781 INFO L471 AbstractCegarLoop]: Abstraction has 449 states and 601 transitions. [2024-10-31 19:32:50,781 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 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 19:32:50,781 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 601 transitions. [2024-10-31 19:32:50,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2024-10-31 19:32:50,783 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 19:32:50,783 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2024-10-31 19:32:50,793 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 19:32:50,983 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 19:32:50,984 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 19:32:50,984 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 19:32:50,984 INFO L85 PathProgramCache]: Analyzing trace with hash 209646767, now seen corresponding path program 1 times [2024-10-31 19:32:50,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 19:32:50,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1498488166] [2024-10-31 19:32:50,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 19:32:50,985 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-10-31 19:32:50,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-10-31 19:32:50,986 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 19:32:50,987 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 19:32:51,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 19:32:51,089 INFO L255 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-31 19:32:51,091 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 19:32:51,158 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2024-10-31 19:32:51,159 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 19:32:51,248 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2024-10-31 19:32:51,249 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 19:32:51,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1498488166] [2024-10-31 19:32:51,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1498488166] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 19:32:51,249 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 19:32:51,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2024-10-31 19:32:51,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331621020] [2024-10-31 19:32:51,249 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 19:32:51,250 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 19:32:51,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 19:32:51,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 19:32:51,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-31 19:32:51,251 INFO L87 Difference]: Start difference. First operand 449 states and 601 transitions. Second operand has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 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 19:32:51,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 19:32:51,324 INFO L93 Difference]: Finished difference Result 1302 states and 1754 transitions. [2024-10-31 19:32:51,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 19:32:51,325 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 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 121 [2024-10-31 19:32:51,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 19:32:51,329 INFO L225 Difference]: With dead ends: 1302 [2024-10-31 19:32:51,329 INFO L226 Difference]: Without dead ends: 872 [2024-10-31 19:32:51,330 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 238 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 19:32:51,331 INFO L432 NwaCegarLoop]: 251 mSDtfsCounter, 297 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 561 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 19:32:51,331 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [297 Valid, 561 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 19:32:51,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 872 states. [2024-10-31 19:32:51,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 872 to 872. [2024-10-31 19:32:51,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 872 states, 871 states have (on average 1.3432835820895523) internal successors, (1170), 871 states have internal predecessors, (1170), 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 19:32:51,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 1170 transitions. [2024-10-31 19:32:51,362 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 1170 transitions. Word has length 121 [2024-10-31 19:32:51,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 19:32:51,362 INFO L471 AbstractCegarLoop]: Abstraction has 872 states and 1170 transitions. [2024-10-31 19:32:51,362 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 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 19:32:51,363 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 1170 transitions. [2024-10-31 19:32:51,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2024-10-31 19:32:51,365 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 19:32:51,365 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2024-10-31 19:32:51,368 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (8)] Ended with exit code 0 [2024-10-31 19:32:51,565 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 19:32:51,566 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 19:32:51,566 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 19:32:51,566 INFO L85 PathProgramCache]: Analyzing trace with hash -247255522, now seen corresponding path program 1 times [2024-10-31 19:32:51,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 19:32:51,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1524758132] [2024-10-31 19:32:51,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 19:32:51,567 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-10-31 19:32:51,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-10-31 19:32:51,570 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 19:32:51,571 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 19:32:51,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 19:32:51,679 INFO L255 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-31 19:32:51,681 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 19:32:51,757 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 155 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2024-10-31 19:32:51,757 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 19:32:51,827 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 155 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2024-10-31 19:32:51,828 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 19:32:51,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1524758132] [2024-10-31 19:32:51,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1524758132] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 19:32:51,828 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 19:32:51,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2024-10-31 19:32:51,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894361073] [2024-10-31 19:32:51,828 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 19:32:51,829 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 19:32:51,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 19:32:51,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 19:32:51,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-31 19:32:51,830 INFO L87 Difference]: Start difference. First operand 872 states and 1170 transitions. Second operand has 4 states, 4 states have (on average 42.25) internal successors, (169), 4 states have internal predecessors, (169), 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 19:32:52,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 19:32:52,096 INFO L93 Difference]: Finished difference Result 2017 states and 2829 transitions. [2024-10-31 19:32:52,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 19:32:52,097 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 42.25) internal successors, (169), 4 states have internal predecessors, (169), 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 159 [2024-10-31 19:32:52,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 19:32:52,101 INFO L225 Difference]: With dead ends: 2017 [2024-10-31 19:32:52,102 INFO L226 Difference]: Without dead ends: 1164 [2024-10-31 19:32:52,103 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 314 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 19:32:52,104 INFO L432 NwaCegarLoop]: 120 mSDtfsCounter, 48 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-31 19:32:52,104 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 219 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-31 19:32:52,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1164 states. [2024-10-31 19:32:52,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1164 to 1150. [2024-10-31 19:32:52,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1150 states, 1149 states have (on average 1.370757180156658) internal successors, (1575), 1149 states have internal predecessors, (1575), 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 19:32:52,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1150 states to 1150 states and 1575 transitions. [2024-10-31 19:32:52,130 INFO L78 Accepts]: Start accepts. Automaton has 1150 states and 1575 transitions. Word has length 159 [2024-10-31 19:32:52,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 19:32:52,130 INFO L471 AbstractCegarLoop]: Abstraction has 1150 states and 1575 transitions. [2024-10-31 19:32:52,130 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 42.25) internal successors, (169), 4 states have internal predecessors, (169), 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 19:32:52,130 INFO L276 IsEmpty]: Start isEmpty. Operand 1150 states and 1575 transitions. [2024-10-31 19:32:52,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2024-10-31 19:32:52,133 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 19:32:52,133 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 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, 1] [2024-10-31 19:32:52,136 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (9)] Ended with exit code 0 [2024-10-31 19:32:52,334 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 19:32:52,334 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 19:32:52,334 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 19:32:52,335 INFO L85 PathProgramCache]: Analyzing trace with hash 1523776844, now seen corresponding path program 1 times [2024-10-31 19:32:52,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 19:32:52,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1090947880] [2024-10-31 19:32:52,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 19:32:52,335 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-10-31 19:32:52,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-10-31 19:32:52,336 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 19:32:52,337 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 19:32:52,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 19:32:52,445 INFO L255 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-31 19:32:52,447 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 19:32:52,482 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2024-10-31 19:32:52,483 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 19:32:52,516 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2024-10-31 19:32:52,517 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 19:32:52,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1090947880] [2024-10-31 19:32:52,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1090947880] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 19:32:52,517 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 19:32:52,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2024-10-31 19:32:52,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373111529] [2024-10-31 19:32:52,517 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 19:32:52,518 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 19:32:52,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 19:32:52,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 19:32:52,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 19:32:52,518 INFO L87 Difference]: Start difference. First operand 1150 states and 1575 transitions. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 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 19:32:52,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 19:32:52,565 INFO L93 Difference]: Finished difference Result 2305 states and 3157 transitions. [2024-10-31 19:32:52,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 19:32:52,566 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 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 166 [2024-10-31 19:32:52,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 19:32:52,570 INFO L225 Difference]: With dead ends: 2305 [2024-10-31 19:32:52,570 INFO L226 Difference]: Without dead ends: 1174 [2024-10-31 19:32:52,571 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 19:32:52,572 INFO L432 NwaCegarLoop]: 183 mSDtfsCounter, 10 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 19:32:52,572 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 346 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 19:32:52,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1174 states. [2024-10-31 19:32:52,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1174 to 1174. [2024-10-31 19:32:52,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1174 states, 1173 states have (on average 1.3674339300937766) internal successors, (1604), 1173 states have internal predecessors, (1604), 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 19:32:52,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1174 states to 1174 states and 1604 transitions. [2024-10-31 19:32:52,595 INFO L78 Accepts]: Start accepts. Automaton has 1174 states and 1604 transitions. Word has length 166 [2024-10-31 19:32:52,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 19:32:52,596 INFO L471 AbstractCegarLoop]: Abstraction has 1174 states and 1604 transitions. [2024-10-31 19:32:52,596 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 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 19:32:52,596 INFO L276 IsEmpty]: Start isEmpty. Operand 1174 states and 1604 transitions. [2024-10-31 19:32:52,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2024-10-31 19:32:52,599 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 19:32:52,599 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 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, 1] [2024-10-31 19:32:52,602 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 19:32:52,799 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 19:32:52,800 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 19:32:52,800 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 19:32:52,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1259129354, now seen corresponding path program 1 times [2024-10-31 19:32:52,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 19:32:52,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [117809906] [2024-10-31 19:32:52,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 19:32:52,800 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-10-31 19:32:52,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-10-31 19:32:52,802 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 19:32:52,802 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 19:32:52,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 19:32:52,910 INFO L255 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-31 19:32:52,913 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 19:32:52,945 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2024-10-31 19:32:52,945 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 19:32:52,992 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2024-10-31 19:32:52,992 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 19:32:52,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [117809906] [2024-10-31 19:32:52,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [117809906] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 19:32:52,992 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 19:32:52,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2024-10-31 19:32:52,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100359544] [2024-10-31 19:32:52,993 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 19:32:52,993 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 19:32:52,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 19:32:52,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 19:32:52,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 19:32:52,994 INFO L87 Difference]: Start difference. First operand 1174 states and 1604 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 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 19:32:53,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 19:32:53,040 INFO L93 Difference]: Finished difference Result 2331 states and 3188 transitions. [2024-10-31 19:32:53,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 19:32:53,041 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 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 166 [2024-10-31 19:32:53,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 19:32:53,045 INFO L225 Difference]: With dead ends: 2331 [2024-10-31 19:32:53,045 INFO L226 Difference]: Without dead ends: 1176 [2024-10-31 19:32:53,047 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 19:32:53,047 INFO L432 NwaCegarLoop]: 173 mSDtfsCounter, 6 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 19:32:53,048 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 326 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 19:32:53,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1176 states. [2024-10-31 19:32:53,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1176 to 1176. [2024-10-31 19:32:53,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1176 states, 1175 states have (on average 1.366808510638298) internal successors, (1606), 1175 states have internal predecessors, (1606), 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 19:32:53,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1176 states to 1176 states and 1606 transitions. [2024-10-31 19:32:53,074 INFO L78 Accepts]: Start accepts. Automaton has 1176 states and 1606 transitions. Word has length 166 [2024-10-31 19:32:53,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 19:32:53,074 INFO L471 AbstractCegarLoop]: Abstraction has 1176 states and 1606 transitions. [2024-10-31 19:32:53,075 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 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 19:32:53,075 INFO L276 IsEmpty]: Start isEmpty. Operand 1176 states and 1606 transitions. [2024-10-31 19:32:53,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2024-10-31 19:32:53,077 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 19:32:53,077 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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] [2024-10-31 19:32:53,080 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 19:32:53,278 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 19:32:53,278 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 19:32:53,279 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 19:32:53,279 INFO L85 PathProgramCache]: Analyzing trace with hash -1724564893, now seen corresponding path program 1 times [2024-10-31 19:32:53,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 19:32:53,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1207876658] [2024-10-31 19:32:53,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 19:32:53,279 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-10-31 19:32:53,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-10-31 19:32:53,282 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 19:32:53,283 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 19:32:53,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 19:32:53,405 INFO L255 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-31 19:32:53,407 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 19:32:53,458 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 222 proven. 0 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2024-10-31 19:32:53,459 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 19:32:53,506 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 222 proven. 0 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2024-10-31 19:32:53,506 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 19:32:53,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1207876658] [2024-10-31 19:32:53,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1207876658] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 19:32:53,507 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 19:32:53,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2024-10-31 19:32:53,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748238758] [2024-10-31 19:32:53,507 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 19:32:53,507 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 19:32:53,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 19:32:53,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 19:32:53,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 19:32:53,508 INFO L87 Difference]: Start difference. First operand 1176 states and 1606 transitions. Second operand has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 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 19:32:53,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 19:32:53,682 INFO L93 Difference]: Finished difference Result 2455 states and 3399 transitions. [2024-10-31 19:32:53,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 19:32:53,686 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 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 202 [2024-10-31 19:32:53,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 19:32:53,692 INFO L225 Difference]: With dead ends: 2455 [2024-10-31 19:32:53,692 INFO L226 Difference]: Without dead ends: 1300 [2024-10-31 19:32:53,693 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 402 GetRequests, 401 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 19:32:53,694 INFO L432 NwaCegarLoop]: 185 mSDtfsCounter, 10 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-31 19:32:53,695 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 268 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-31 19:32:53,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1300 states. [2024-10-31 19:32:53,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1300 to 1300. [2024-10-31 19:32:53,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1300 states, 1299 states have (on average 1.3471901462663587) internal successors, (1750), 1299 states have internal predecessors, (1750), 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 19:32:53,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1300 states to 1300 states and 1750 transitions. [2024-10-31 19:32:53,719 INFO L78 Accepts]: Start accepts. Automaton has 1300 states and 1750 transitions. Word has length 202 [2024-10-31 19:32:53,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 19:32:53,720 INFO L471 AbstractCegarLoop]: Abstraction has 1300 states and 1750 transitions. [2024-10-31 19:32:53,720 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 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 19:32:53,720 INFO L276 IsEmpty]: Start isEmpty. Operand 1300 states and 1750 transitions. [2024-10-31 19:32:53,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2024-10-31 19:32:53,723 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 19:32:53,723 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 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] [2024-10-31 19:32:53,726 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 19:32:53,923 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 19:32:53,924 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 19:32:53,924 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 19:32:53,924 INFO L85 PathProgramCache]: Analyzing trace with hash 598072934, now seen corresponding path program 1 times [2024-10-31 19:32:53,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 19:32:53,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1057642028] [2024-10-31 19:32:53,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 19:32:53,925 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-10-31 19:32:53,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-10-31 19:32:53,926 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 19:32:53,927 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 19:32:54,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 19:32:54,064 INFO L255 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-31 19:32:54,067 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 19:32:54,136 INFO L134 CoverageAnalysis]: Checked inductivity of 458 backedges. 160 proven. 0 refuted. 0 times theorem prover too weak. 298 trivial. 0 not checked. [2024-10-31 19:32:54,136 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 19:32:54,204 INFO L134 CoverageAnalysis]: Checked inductivity of 458 backedges. 160 proven. 0 refuted. 0 times theorem prover too weak. 298 trivial. 0 not checked. [2024-10-31 19:32:54,204 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 19:32:54,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1057642028] [2024-10-31 19:32:54,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1057642028] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 19:32:54,204 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 19:32:54,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2024-10-31 19:32:54,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445722197] [2024-10-31 19:32:54,205 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 19:32:54,205 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 19:32:54,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 19:32:54,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 19:32:54,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-31 19:32:54,206 INFO L87 Difference]: Start difference. First operand 1300 states and 1750 transitions. Second operand has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 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 19:32:54,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 19:32:54,480 INFO L93 Difference]: Finished difference Result 2647 states and 3669 transitions. [2024-10-31 19:32:54,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 19:32:54,480 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 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 229 [2024-10-31 19:32:54,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 19:32:54,484 INFO L225 Difference]: With dead ends: 2647 [2024-10-31 19:32:54,485 INFO L226 Difference]: Without dead ends: 1190 [2024-10-31 19:32:54,487 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 456 GetRequests, 454 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 19:32:54,487 INFO L432 NwaCegarLoop]: 123 mSDtfsCounter, 38 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-31 19:32:54,487 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 221 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-31 19:32:54,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1190 states. [2024-10-31 19:32:54,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1190 to 1190. [2024-10-31 19:32:54,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1190 states, 1189 states have (on average 1.3650126156433977) internal successors, (1623), 1189 states have internal predecessors, (1623), 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 19:32:54,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1190 states to 1190 states and 1623 transitions. [2024-10-31 19:32:54,542 INFO L78 Accepts]: Start accepts. Automaton has 1190 states and 1623 transitions. Word has length 229 [2024-10-31 19:32:54,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 19:32:54,542 INFO L471 AbstractCegarLoop]: Abstraction has 1190 states and 1623 transitions. [2024-10-31 19:32:54,542 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 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 19:32:54,543 INFO L276 IsEmpty]: Start isEmpty. Operand 1190 states and 1623 transitions. [2024-10-31 19:32:54,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2024-10-31 19:32:54,546 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 19:32:54,546 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 2, 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] [2024-10-31 19:32:54,550 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (13)] Ended with exit code 0 [2024-10-31 19:32:54,746 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 19:32:54,747 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 19:32:54,747 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 19:32:54,747 INFO L85 PathProgramCache]: Analyzing trace with hash 1622703552, now seen corresponding path program 1 times [2024-10-31 19:32:54,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 19:32:54,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1122607724] [2024-10-31 19:32:54,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 19:32:54,747 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-10-31 19:32:54,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-10-31 19:32:54,749 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 19:32:54,750 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 19:32:54,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 19:32:54,888 INFO L255 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-31 19:32:54,890 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 19:32:54,999 INFO L134 CoverageAnalysis]: Checked inductivity of 654 backedges. 493 proven. 0 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2024-10-31 19:32:55,000 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 19:32:55,102 INFO L134 CoverageAnalysis]: Checked inductivity of 654 backedges. 493 proven. 0 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2024-10-31 19:32:55,103 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 19:32:55,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1122607724] [2024-10-31 19:32:55,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1122607724] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 19:32:55,103 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 19:32:55,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2024-10-31 19:32:55,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12928275] [2024-10-31 19:32:55,103 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 19:32:55,104 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 19:32:55,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 19:32:55,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 19:32:55,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 19:32:55,105 INFO L87 Difference]: Start difference. First operand 1190 states and 1623 transitions. Second operand has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 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 19:32:55,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 19:32:55,140 INFO L93 Difference]: Finished difference Result 3319 states and 4579 transitions. [2024-10-31 19:32:55,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 19:32:55,141 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 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 269 [2024-10-31 19:32:55,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 19:32:55,145 INFO L225 Difference]: With dead ends: 3319 [2024-10-31 19:32:55,145 INFO L226 Difference]: Without dead ends: 1147 [2024-10-31 19:32:55,147 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 536 GetRequests, 535 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 19:32:55,148 INFO L432 NwaCegarLoop]: 289 mSDtfsCounter, 111 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 19:32:55,148 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 454 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 19:32:55,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1147 states. [2024-10-31 19:32:55,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1147 to 1147. [2024-10-31 19:32:55,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1147 states, 1146 states have (on average 1.369109947643979) internal successors, (1569), 1146 states have internal predecessors, (1569), 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 19:32:55,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1147 states to 1147 states and 1569 transitions. [2024-10-31 19:32:55,173 INFO L78 Accepts]: Start accepts. Automaton has 1147 states and 1569 transitions. Word has length 269 [2024-10-31 19:32:55,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 19:32:55,173 INFO L471 AbstractCegarLoop]: Abstraction has 1147 states and 1569 transitions. [2024-10-31 19:32:55,173 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 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 19:32:55,173 INFO L276 IsEmpty]: Start isEmpty. Operand 1147 states and 1569 transitions. [2024-10-31 19:32:55,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2024-10-31 19:32:55,177 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 19:32:55,177 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 8, 8, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 2, 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, 1, 1, 1, 1, 1] [2024-10-31 19:32:55,182 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (14)] Ended with exit code 0 [2024-10-31 19:32:55,378 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 19:32:55,378 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 19:32:55,378 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 19:32:55,378 INFO L85 PathProgramCache]: Analyzing trace with hash 746936446, now seen corresponding path program 1 times [2024-10-31 19:32:55,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 19:32:55,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [704724089] [2024-10-31 19:32:55,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 19:32:55,379 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-10-31 19:32:55,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-10-31 19:32:55,380 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-10-31 19:32:55,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2024-10-31 19:32:55,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 19:32:55,534 INFO L255 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-31 19:32:55,538 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 19:32:55,576 INFO L134 CoverageAnalysis]: Checked inductivity of 954 backedges. 500 proven. 0 refuted. 0 times theorem prover too weak. 454 trivial. 0 not checked. [2024-10-31 19:32:55,576 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 19:32:55,617 INFO L134 CoverageAnalysis]: Checked inductivity of 954 backedges. 500 proven. 0 refuted. 0 times theorem prover too weak. 454 trivial. 0 not checked. [2024-10-31 19:32:55,618 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 19:32:55,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [704724089] [2024-10-31 19:32:55,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [704724089] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 19:32:55,618 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 19:32:55,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2024-10-31 19:32:55,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216553343] [2024-10-31 19:32:55,618 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 19:32:55,619 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 19:32:55,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 19:32:55,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 19:32:55,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 19:32:55,620 INFO L87 Difference]: Start difference. First operand 1147 states and 1569 transitions. Second operand has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 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 19:32:55,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 19:32:55,778 INFO L93 Difference]: Finished difference Result 2354 states and 3245 transitions. [2024-10-31 19:32:55,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 19:32:55,783 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 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 315 [2024-10-31 19:32:55,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 19:32:55,787 INFO L225 Difference]: With dead ends: 2354 [2024-10-31 19:32:55,788 INFO L226 Difference]: Without dead ends: 1228 [2024-10-31 19:32:55,789 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 628 GetRequests, 627 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 19:32:55,790 INFO L432 NwaCegarLoop]: 177 mSDtfsCounter, 9 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 19:32:55,790 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 262 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 19:32:55,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1228 states. [2024-10-31 19:32:55,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1228 to 1228. [2024-10-31 19:32:55,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1228 states, 1227 states have (on average 1.3569682151589242) internal successors, (1665), 1227 states have internal predecessors, (1665), 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 19:32:55,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1228 states to 1228 states and 1665 transitions. [2024-10-31 19:32:55,831 INFO L78 Accepts]: Start accepts. Automaton has 1228 states and 1665 transitions. Word has length 315 [2024-10-31 19:32:55,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 19:32:55,832 INFO L471 AbstractCegarLoop]: Abstraction has 1228 states and 1665 transitions. [2024-10-31 19:32:55,832 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 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 19:32:55,832 INFO L276 IsEmpty]: Start isEmpty. Operand 1228 states and 1665 transitions. [2024-10-31 19:32:55,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2024-10-31 19:32:55,836 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 19:32:55,836 INFO L215 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 9, 9, 8, 8, 7, 7, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 2, 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, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 19:32:55,839 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2024-10-31 19:32:56,038 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-10-31 19:32:56,039 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 19:32:56,039 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 19:32:56,039 INFO L85 PathProgramCache]: Analyzing trace with hash -1865013778, now seen corresponding path program 1 times [2024-10-31 19:32:56,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 19:32:56,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [644042858] [2024-10-31 19:32:56,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 19:32:56,040 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-10-31 19:32:56,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-10-31 19:32:56,042 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-10-31 19:32:56,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2024-10-31 19:32:56,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 19:32:56,201 INFO L255 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-31 19:32:56,205 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 19:32:56,248 INFO L134 CoverageAnalysis]: Checked inductivity of 1151 backedges. 642 proven. 0 refuted. 0 times theorem prover too weak. 509 trivial. 0 not checked. [2024-10-31 19:32:56,248 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 19:32:56,286 INFO L134 CoverageAnalysis]: Checked inductivity of 1151 backedges. 642 proven. 0 refuted. 0 times theorem prover too weak. 509 trivial. 0 not checked. [2024-10-31 19:32:56,286 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 19:32:56,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [644042858] [2024-10-31 19:32:56,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [644042858] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 19:32:56,286 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 19:32:56,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2024-10-31 19:32:56,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93172913] [2024-10-31 19:32:56,287 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 19:32:56,287 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 19:32:56,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 19:32:56,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 19:32:56,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 19:32:56,288 INFO L87 Difference]: Start difference. First operand 1228 states and 1665 transitions. Second operand has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 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 19:32:56,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 19:32:56,444 INFO L93 Difference]: Finished difference Result 2522 states and 3449 transitions. [2024-10-31 19:32:56,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 19:32:56,448 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 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 338 [2024-10-31 19:32:56,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 19:32:56,453 INFO L225 Difference]: With dead ends: 2522 [2024-10-31 19:32:56,453 INFO L226 Difference]: Without dead ends: 1315 [2024-10-31 19:32:56,456 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 674 GetRequests, 673 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 19:32:56,456 INFO L432 NwaCegarLoop]: 177 mSDtfsCounter, 9 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 19:32:56,456 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 262 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 19:32:56,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1315 states. [2024-10-31 19:32:56,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1315 to 1315. [2024-10-31 19:32:56,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1315 states, 1314 states have (on average 1.3447488584474885) internal successors, (1767), 1314 states have internal predecessors, (1767), 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 19:32:56,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1315 states to 1315 states and 1767 transitions. [2024-10-31 19:32:56,482 INFO L78 Accepts]: Start accepts. Automaton has 1315 states and 1767 transitions. Word has length 338 [2024-10-31 19:32:56,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 19:32:56,482 INFO L471 AbstractCegarLoop]: Abstraction has 1315 states and 1767 transitions. [2024-10-31 19:32:56,483 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 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 19:32:56,483 INFO L276 IsEmpty]: Start isEmpty. Operand 1315 states and 1767 transitions. [2024-10-31 19:32:56,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 371 [2024-10-31 19:32:56,488 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 19:32:56,488 INFO L215 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 10, 10, 9, 9, 8, 8, 7, 7, 7, 7, 5, 5, 5, 5, 5, 5, 5, 4, 4, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 19:32:56,492 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2024-10-31 19:32:56,688 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-10-31 19:32:56,689 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 19:32:56,689 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 19:32:56,689 INFO L85 PathProgramCache]: Analyzing trace with hash -1876884711, now seen corresponding path program 1 times [2024-10-31 19:32:56,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 19:32:56,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2020629001] [2024-10-31 19:32:56,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 19:32:56,690 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-10-31 19:32:56,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-10-31 19:32:56,691 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-10-31 19:32:56,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2024-10-31 19:32:56,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 19:32:56,858 INFO L255 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-31 19:32:56,861 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 19:32:56,960 INFO L134 CoverageAnalysis]: Checked inductivity of 1396 backedges. 699 proven. 0 refuted. 0 times theorem prover too weak. 697 trivial. 0 not checked. [2024-10-31 19:32:56,961 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 19:32:57,051 INFO L134 CoverageAnalysis]: Checked inductivity of 1396 backedges. 699 proven. 0 refuted. 0 times theorem prover too weak. 697 trivial. 0 not checked. [2024-10-31 19:32:57,051 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 19:32:57,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2020629001] [2024-10-31 19:32:57,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [2020629001] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 19:32:57,052 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 19:32:57,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2024-10-31 19:32:57,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320269976] [2024-10-31 19:32:57,052 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 19:32:57,053 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 19:32:57,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 19:32:57,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 19:32:57,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 19:32:57,053 INFO L87 Difference]: Start difference. First operand 1315 states and 1767 transitions. Second operand has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 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 19:32:57,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 19:32:57,083 INFO L93 Difference]: Finished difference Result 3897 states and 5242 transitions. [2024-10-31 19:32:57,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 19:32:57,084 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 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 370 [2024-10-31 19:32:57,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 19:32:57,093 INFO L225 Difference]: With dead ends: 3897 [2024-10-31 19:32:57,093 INFO L226 Difference]: Without dead ends: 2603 [2024-10-31 19:32:57,096 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 738 GetRequests, 737 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 19:32:57,097 INFO L432 NwaCegarLoop]: 205 mSDtfsCounter, 121 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 19:32:57,097 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 366 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 19:32:57,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2603 states. [2024-10-31 19:32:57,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2603 to 2601. [2024-10-31 19:32:57,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2601 states, 2600 states have (on average 1.3434615384615385) internal successors, (3493), 2600 states have internal predecessors, (3493), 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 19:32:57,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2601 states to 2601 states and 3493 transitions. [2024-10-31 19:32:57,183 INFO L78 Accepts]: Start accepts. Automaton has 2601 states and 3493 transitions. Word has length 370 [2024-10-31 19:32:57,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 19:32:57,183 INFO L471 AbstractCegarLoop]: Abstraction has 2601 states and 3493 transitions. [2024-10-31 19:32:57,183 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 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 19:32:57,183 INFO L276 IsEmpty]: Start isEmpty. Operand 2601 states and 3493 transitions. [2024-10-31 19:32:57,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 372 [2024-10-31 19:32:57,189 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 19:32:57,190 INFO L215 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 10, 10, 9, 9, 8, 8, 7, 7, 7, 7, 5, 5, 5, 5, 5, 5, 5, 4, 4, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 19:32:57,194 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (17)] Ended with exit code 0 [2024-10-31 19:32:57,392 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-10-31 19:32:57,393 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 19:32:57,393 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 19:32:57,393 INFO L85 PathProgramCache]: Analyzing trace with hash -59651589, now seen corresponding path program 1 times [2024-10-31 19:32:57,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 19:32:57,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1539585149] [2024-10-31 19:32:57,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 19:32:57,394 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-10-31 19:32:57,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-10-31 19:32:57,397 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-10-31 19:32:57,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2024-10-31 19:32:57,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 19:32:57,583 INFO L255 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-31 19:32:57,589 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 19:32:57,687 INFO L134 CoverageAnalysis]: Checked inductivity of 1396 backedges. 875 proven. 26 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2024-10-31 19:32:57,688 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 19:32:57,774 INFO L134 CoverageAnalysis]: Checked inductivity of 1396 backedges. 875 proven. 26 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2024-10-31 19:32:57,774 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 19:32:57,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1539585149] [2024-10-31 19:32:57,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1539585149] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 19:32:57,775 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 19:32:57,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2024-10-31 19:32:57,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353544427] [2024-10-31 19:32:57,775 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 19:32:57,776 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 19:32:57,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 19:32:57,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 19:32:57,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 19:32:57,777 INFO L87 Difference]: Start difference. First operand 2601 states and 3493 transitions. Second operand has 4 states, 4 states have (on average 42.25) internal successors, (169), 4 states have internal predecessors, (169), 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 19:32:58,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 19:32:58,055 INFO L93 Difference]: Finished difference Result 7695 states and 10303 transitions. [2024-10-31 19:32:58,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 19:32:58,060 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 42.25) internal successors, (169), 4 states have internal predecessors, (169), 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 371 [2024-10-31 19:32:58,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 19:32:58,075 INFO L225 Difference]: With dead ends: 7695 [2024-10-31 19:32:58,075 INFO L226 Difference]: Without dead ends: 5115 [2024-10-31 19:32:58,080 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 742 GetRequests, 739 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-10-31 19:32:58,081 INFO L432 NwaCegarLoop]: 266 mSDtfsCounter, 136 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 564 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-31 19:32:58,081 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 564 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-31 19:32:58,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5115 states. [2024-10-31 19:32:58,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5115 to 3489. [2024-10-31 19:32:58,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3489 states, 3488 states have (on average 1.369552752293578) internal successors, (4777), 3488 states have internal predecessors, (4777), 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 19:32:58,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3489 states to 3489 states and 4777 transitions. [2024-10-31 19:32:58,166 INFO L78 Accepts]: Start accepts. Automaton has 3489 states and 4777 transitions. Word has length 371 [2024-10-31 19:32:58,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 19:32:58,166 INFO L471 AbstractCegarLoop]: Abstraction has 3489 states and 4777 transitions. [2024-10-31 19:32:58,166 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 42.25) internal successors, (169), 4 states have internal predecessors, (169), 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 19:32:58,166 INFO L276 IsEmpty]: Start isEmpty. Operand 3489 states and 4777 transitions. [2024-10-31 19:32:58,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 402 [2024-10-31 19:32:58,171 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 19:32:58,172 INFO L215 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 11, 11, 10, 10, 9, 9, 8, 8, 8, 8, 6, 5, 5, 5, 5, 5, 5, 4, 4, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 19:32:58,175 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (18)] Ended with exit code 0 [2024-10-31 19:32:58,372 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-10-31 19:32:58,372 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 19:32:58,373 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 19:32:58,373 INFO L85 PathProgramCache]: Analyzing trace with hash -1792598736, now seen corresponding path program 1 times [2024-10-31 19:32:58,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 19:32:58,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [223656781] [2024-10-31 19:32:58,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 19:32:58,374 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-10-31 19:32:58,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-10-31 19:32:58,377 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-10-31 19:32:58,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2024-10-31 19:32:58,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 19:32:58,552 INFO L255 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-31 19:32:58,556 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 19:32:58,590 INFO L134 CoverageAnalysis]: Checked inductivity of 1670 backedges. 916 proven. 0 refuted. 0 times theorem prover too weak. 754 trivial. 0 not checked. [2024-10-31 19:32:58,590 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 19:32:58,621 INFO L134 CoverageAnalysis]: Checked inductivity of 1670 backedges. 916 proven. 0 refuted. 0 times theorem prover too weak. 754 trivial. 0 not checked. [2024-10-31 19:32:58,621 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 19:32:58,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [223656781] [2024-10-31 19:32:58,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [223656781] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 19:32:58,621 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 19:32:58,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2024-10-31 19:32:58,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900526797] [2024-10-31 19:32:58,622 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 19:32:58,622 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 19:32:58,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 19:32:58,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 19:32:58,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 19:32:58,623 INFO L87 Difference]: Start difference. First operand 3489 states and 4777 transitions. Second operand has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 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 19:32:58,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 19:32:58,771 INFO L93 Difference]: Finished difference Result 7197 states and 9889 transitions. [2024-10-31 19:32:58,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 19:32:58,775 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 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 401 [2024-10-31 19:32:58,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 19:32:58,788 INFO L225 Difference]: With dead ends: 7197 [2024-10-31 19:32:58,788 INFO L226 Difference]: Without dead ends: 3729 [2024-10-31 19:32:58,793 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 800 GetRequests, 799 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 19:32:58,794 INFO L432 NwaCegarLoop]: 179 mSDtfsCounter, 9 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 19:32:58,795 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 264 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 19:32:58,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3729 states. [2024-10-31 19:32:58,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3729 to 3609. [2024-10-31 19:32:58,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3609 states, 3608 states have (on average 1.3655764966740576) internal successors, (4927), 3608 states have internal predecessors, (4927), 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 19:32:58,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3609 states to 3609 states and 4927 transitions. [2024-10-31 19:32:58,868 INFO L78 Accepts]: Start accepts. Automaton has 3609 states and 4927 transitions. Word has length 401 [2024-10-31 19:32:58,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 19:32:58,868 INFO L471 AbstractCegarLoop]: Abstraction has 3609 states and 4927 transitions. [2024-10-31 19:32:58,868 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 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 19:32:58,869 INFO L276 IsEmpty]: Start isEmpty. Operand 3609 states and 4927 transitions. [2024-10-31 19:32:58,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 403 [2024-10-31 19:32:58,873 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 19:32:58,874 INFO L215 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 11, 11, 10, 10, 9, 9, 8, 8, 8, 8, 6, 5, 5, 5, 5, 5, 5, 4, 4, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 19:32:58,878 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2024-10-31 19:32:59,074 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-10-31 19:32:59,075 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 19:32:59,075 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 19:32:59,075 INFO L85 PathProgramCache]: Analyzing trace with hash 571180815, now seen corresponding path program 1 times [2024-10-31 19:32:59,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 19:32:59,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [849777255] [2024-10-31 19:32:59,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 19:32:59,076 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-10-31 19:32:59,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-10-31 19:32:59,078 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-10-31 19:32:59,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2024-10-31 19:32:59,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 19:32:59,254 INFO L255 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-31 19:32:59,258 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 19:32:59,310 INFO L134 CoverageAnalysis]: Checked inductivity of 1670 backedges. 983 proven. 0 refuted. 0 times theorem prover too weak. 687 trivial. 0 not checked. [2024-10-31 19:32:59,310 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 19:32:59,357 INFO L134 CoverageAnalysis]: Checked inductivity of 1670 backedges. 983 proven. 0 refuted. 0 times theorem prover too weak. 687 trivial. 0 not checked. [2024-10-31 19:32:59,357 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 19:32:59,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [849777255] [2024-10-31 19:32:59,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [849777255] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 19:32:59,357 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 19:32:59,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2024-10-31 19:32:59,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583150689] [2024-10-31 19:32:59,358 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 19:32:59,359 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 19:32:59,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 19:32:59,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 19:32:59,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 19:32:59,360 INFO L87 Difference]: Start difference. First operand 3609 states and 4927 transitions. Second operand has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 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 19:32:59,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 19:32:59,565 INFO L93 Difference]: Finished difference Result 7605 states and 10525 transitions. [2024-10-31 19:32:59,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 19:32:59,569 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 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 402 [2024-10-31 19:32:59,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 19:32:59,590 INFO L225 Difference]: With dead ends: 7605 [2024-10-31 19:32:59,590 INFO L226 Difference]: Without dead ends: 4017 [2024-10-31 19:32:59,594 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 802 GetRequests, 801 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 19:32:59,595 INFO L432 NwaCegarLoop]: 177 mSDtfsCounter, 9 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-31 19:32:59,595 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 262 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-31 19:32:59,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4017 states. [2024-10-31 19:32:59,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4017 to 4017. [2024-10-31 19:32:59,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4017 states, 4016 states have (on average 1.3433764940239044) internal successors, (5395), 4016 states have internal predecessors, (5395), 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 19:32:59,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4017 states to 4017 states and 5395 transitions. [2024-10-31 19:32:59,673 INFO L78 Accepts]: Start accepts. Automaton has 4017 states and 5395 transitions. Word has length 402 [2024-10-31 19:32:59,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 19:32:59,674 INFO L471 AbstractCegarLoop]: Abstraction has 4017 states and 5395 transitions. [2024-10-31 19:32:59,674 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 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 19:32:59,674 INFO L276 IsEmpty]: Start isEmpty. Operand 4017 states and 5395 transitions. [2024-10-31 19:32:59,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2024-10-31 19:32:59,680 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 19:32:59,680 INFO L215 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 12, 12, 11, 11, 10, 10, 9, 9, 9, 9, 7, 6, 6, 5, 5, 5, 5, 4, 4, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 19:32:59,684 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2024-10-31 19:32:59,880 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-10-31 19:32:59,881 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 19:32:59,881 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 19:32:59,881 INFO L85 PathProgramCache]: Analyzing trace with hash 1646161403, now seen corresponding path program 1 times [2024-10-31 19:32:59,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 19:32:59,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1141900475] [2024-10-31 19:32:59,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 19:32:59,882 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-10-31 19:32:59,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-10-31 19:32:59,883 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-10-31 19:32:59,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2024-10-31 19:33:00,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 19:33:00,050 INFO L255 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-31 19:33:00,054 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 19:33:00,107 INFO L134 CoverageAnalysis]: Checked inductivity of 1981 backedges. 1162 proven. 0 refuted. 0 times theorem prover too weak. 819 trivial. 0 not checked. [2024-10-31 19:33:00,107 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 19:33:00,157 INFO L134 CoverageAnalysis]: Checked inductivity of 1981 backedges. 1162 proven. 0 refuted. 0 times theorem prover too weak. 819 trivial. 0 not checked. [2024-10-31 19:33:00,157 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 19:33:00,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1141900475] [2024-10-31 19:33:00,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1141900475] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 19:33:00,158 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 19:33:00,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2024-10-31 19:33:00,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120563103] [2024-10-31 19:33:00,158 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 19:33:00,159 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 19:33:00,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 19:33:00,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 19:33:00,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 19:33:00,159 INFO L87 Difference]: Start difference. First operand 4017 states and 5395 transitions. Second operand has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:33:00,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 19:33:00,326 INFO L93 Difference]: Finished difference Result 7995 states and 10735 transitions. [2024-10-31 19:33:00,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 19:33:00,329 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 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 433 [2024-10-31 19:33:00,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 19:33:00,339 INFO L225 Difference]: With dead ends: 7995 [2024-10-31 19:33:00,339 INFO L226 Difference]: Without dead ends: 3999 [2024-10-31 19:33:00,346 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 864 GetRequests, 863 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 19:33:00,347 INFO L432 NwaCegarLoop]: 177 mSDtfsCounter, 9 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 19:33:00,347 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 262 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 19:33:00,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3999 states. [2024-10-31 19:33:00,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3999 to 3999. [2024-10-31 19:33:00,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3999 states, 3998 states have (on average 1.278889444722361) internal successors, (5113), 3998 states have internal predecessors, (5113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:33:00,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3999 states to 3999 states and 5113 transitions. [2024-10-31 19:33:00,443 INFO L78 Accepts]: Start accepts. Automaton has 3999 states and 5113 transitions. Word has length 433 [2024-10-31 19:33:00,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 19:33:00,444 INFO L471 AbstractCegarLoop]: Abstraction has 3999 states and 5113 transitions. [2024-10-31 19:33:00,444 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:33:00,444 INFO L276 IsEmpty]: Start isEmpty. Operand 3999 states and 5113 transitions. [2024-10-31 19:33:00,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 467 [2024-10-31 19:33:00,450 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 19:33:00,450 INFO L215 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 13, 13, 12, 12, 11, 11, 10, 10, 10, 10, 8, 7, 7, 6, 6, 5, 5, 4, 4, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 19:33:00,455 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2024-10-31 19:33:00,651 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-10-31 19:33:00,651 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 19:33:00,651 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 19:33:00,652 INFO L85 PathProgramCache]: Analyzing trace with hash 912404788, now seen corresponding path program 1 times [2024-10-31 19:33:00,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 19:33:00,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [381684014] [2024-10-31 19:33:00,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 19:33:00,652 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-10-31 19:33:00,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-10-31 19:33:00,654 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-10-31 19:33:00,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2024-10-31 19:33:00,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 19:33:00,845 INFO L255 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-31 19:33:00,849 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 19:33:00,900 INFO L134 CoverageAnalysis]: Checked inductivity of 2331 backedges. 1351 proven. 0 refuted. 0 times theorem prover too weak. 980 trivial. 0 not checked. [2024-10-31 19:33:00,900 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 19:33:00,949 INFO L134 CoverageAnalysis]: Checked inductivity of 2331 backedges. 1351 proven. 0 refuted. 0 times theorem prover too weak. 980 trivial. 0 not checked. [2024-10-31 19:33:00,949 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 19:33:00,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [381684014] [2024-10-31 19:33:00,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [381684014] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 19:33:00,949 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 19:33:00,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2024-10-31 19:33:00,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472851376] [2024-10-31 19:33:00,950 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 19:33:00,950 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 19:33:00,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 19:33:00,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 19:33:00,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 19:33:00,951 INFO L87 Difference]: Start difference. First operand 3999 states and 5113 transitions. Second operand has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:33:01,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 19:33:01,147 INFO L93 Difference]: Finished difference Result 7567 states and 9623 transitions. [2024-10-31 19:33:01,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 19:33:01,148 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 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 466 [2024-10-31 19:33:01,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 19:33:01,155 INFO L225 Difference]: With dead ends: 7567 [2024-10-31 19:33:01,155 INFO L226 Difference]: Without dead ends: 3589 [2024-10-31 19:33:01,159 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 930 GetRequests, 929 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 19:33:01,160 INFO L432 NwaCegarLoop]: 176 mSDtfsCounter, 13 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-31 19:33:01,160 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 261 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-31 19:33:01,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3589 states. [2024-10-31 19:33:01,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3589 to 3117. [2024-10-31 19:33:01,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3117 states, 3116 states have (on average 1.2102053915275994) internal successors, (3771), 3116 states have internal predecessors, (3771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:33:01,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3117 states to 3117 states and 3771 transitions. [2024-10-31 19:33:01,212 INFO L78 Accepts]: Start accepts. Automaton has 3117 states and 3771 transitions. Word has length 466 [2024-10-31 19:33:01,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 19:33:01,212 INFO L471 AbstractCegarLoop]: Abstraction has 3117 states and 3771 transitions. [2024-10-31 19:33:01,212 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:33:01,212 INFO L276 IsEmpty]: Start isEmpty. Operand 3117 states and 3771 transitions. [2024-10-31 19:33:01,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 505 [2024-10-31 19:33:01,217 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 19:33:01,217 INFO L215 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 14, 14, 13, 13, 12, 12, 11, 11, 11, 11, 9, 8, 8, 7, 7, 6, 6, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 19:33:01,221 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (22)] Ended with exit code 0 [2024-10-31 19:33:01,417 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-10-31 19:33:01,418 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 19:33:01,418 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 19:33:01,418 INFO L85 PathProgramCache]: Analyzing trace with hash 325769247, now seen corresponding path program 1 times [2024-10-31 19:33:01,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 19:33:01,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1694321793] [2024-10-31 19:33:01,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 19:33:01,418 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-10-31 19:33:01,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-10-31 19:33:01,420 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-10-31 19:33:01,421 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2024-10-31 19:33:01,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 19:33:01,644 INFO L255 TraceCheckSpWp]: Trace formula consists of 554 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-31 19:33:01,649 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 19:33:01,749 INFO L134 CoverageAnalysis]: Checked inductivity of 2727 backedges. 1308 proven. 26 refuted. 0 times theorem prover too weak. 1393 trivial. 0 not checked. [2024-10-31 19:33:01,749 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 19:33:01,852 INFO L134 CoverageAnalysis]: Checked inductivity of 2727 backedges. 1308 proven. 26 refuted. 0 times theorem prover too weak. 1393 trivial. 0 not checked. [2024-10-31 19:33:01,852 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 19:33:01,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1694321793] [2024-10-31 19:33:01,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1694321793] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 19:33:01,853 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 19:33:01,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2024-10-31 19:33:01,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511949883] [2024-10-31 19:33:01,853 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 19:33:01,854 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-31 19:33:01,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 19:33:01,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-31 19:33:01,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-31 19:33:01,855 INFO L87 Difference]: Start difference. First operand 3117 states and 3771 transitions. Second operand has 6 states, 6 states have (on average 46.0) internal successors, (276), 6 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:33:02,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 19:33:02,267 INFO L93 Difference]: Finished difference Result 4438 states and 5392 transitions. [2024-10-31 19:33:02,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-31 19:33:02,268 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 46.0) internal successors, (276), 6 states have internal predecessors, (276), 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 504 [2024-10-31 19:33:02,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 19:33:02,269 INFO L225 Difference]: With dead ends: 4438 [2024-10-31 19:33:02,269 INFO L226 Difference]: Without dead ends: 0 [2024-10-31 19:33:02,272 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1012 GetRequests, 1005 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2024-10-31 19:33:02,272 INFO L432 NwaCegarLoop]: 181 mSDtfsCounter, 186 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-31 19:33:02,273 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [186 Valid, 482 Invalid, 425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 378 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-31 19:33:02,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-10-31 19:33:02,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-10-31 19:33:02,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:33:02,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-10-31 19:33:02,274 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 504 [2024-10-31 19:33:02,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 19:33:02,274 INFO L471 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-10-31 19:33:02,275 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 46.0) internal successors, (276), 6 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:33:02,275 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-10-31 19:33:02,276 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-10-31 19:33:02,278 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-10-31 19:33:02,282 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (23)] Ended with exit code 0 [2024-10-31 19:33:02,481 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-10-31 19:33:02,484 INFO L407 BasicCegarLoop]: Path program histogram: [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 19:33:02,485 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-10-31 19:33:03,503 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2024-10-31 19:33:03,527 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.10 07:33:03 BoogieIcfgContainer [2024-10-31 19:33:03,528 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-10-31 19:33:03,528 INFO L158 Benchmark]: Toolchain (without parser) took 17911.47ms. Allocated memory was 207.6MB in the beginning and 331.4MB in the end (delta: 123.7MB). Free memory was 172.5MB in the beginning and 212.6MB in the end (delta: -40.1MB). Peak memory consumption was 189.0MB. Max. memory is 8.0GB. [2024-10-31 19:33:03,528 INFO L158 Benchmark]: CDTParser took 1.11ms. Allocated memory is still 207.6MB. Free memory is still 184.8MB. There was no memory consumed. Max. memory is 8.0GB. [2024-10-31 19:33:03,528 INFO L158 Benchmark]: CACSL2BoogieTranslator took 394.24ms. Allocated memory is still 207.6MB. Free memory was 172.5MB in the beginning and 154.1MB in the end (delta: 18.4MB). Peak memory consumption was 18.9MB. Max. memory is 8.0GB. [2024-10-31 19:33:03,529 INFO L158 Benchmark]: Boogie Procedure Inliner took 46.00ms. Allocated memory is still 207.6MB. Free memory was 154.1MB in the beginning and 151.5MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2024-10-31 19:33:03,529 INFO L158 Benchmark]: Boogie Preprocessor took 62.36ms. Allocated memory is still 207.6MB. Free memory was 151.5MB in the beginning and 148.4MB in the end (delta: 3.1MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. [2024-10-31 19:33:03,529 INFO L158 Benchmark]: RCFGBuilder took 828.49ms. Allocated memory is still 207.6MB. Free memory was 148.4MB in the beginning and 169.4MB in the end (delta: -21.0MB). Peak memory consumption was 30.9MB. Max. memory is 8.0GB. [2024-10-31 19:33:03,529 INFO L158 Benchmark]: TraceAbstraction took 16570.26ms. Allocated memory was 207.6MB in the beginning and 331.4MB in the end (delta: 123.7MB). Free memory was 168.4MB in the beginning and 212.6MB in the end (delta: -44.2MB). Peak memory consumption was 183.3MB. Max. memory is 8.0GB. [2024-10-31 19:33:03,532 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.11ms. Allocated memory is still 207.6MB. Free memory is still 184.8MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 394.24ms. Allocated memory is still 207.6MB. Free memory was 172.5MB in the beginning and 154.1MB in the end (delta: 18.4MB). Peak memory consumption was 18.9MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 46.00ms. Allocated memory is still 207.6MB. Free memory was 154.1MB in the beginning and 151.5MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 62.36ms. Allocated memory is still 207.6MB. Free memory was 151.5MB in the beginning and 148.4MB in the end (delta: 3.1MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. * RCFGBuilder took 828.49ms. Allocated memory is still 207.6MB. Free memory was 148.4MB in the beginning and 169.4MB in the end (delta: -21.0MB). Peak memory consumption was 30.9MB. Max. memory is 8.0GB. * TraceAbstraction took 16570.26ms. Allocated memory was 207.6MB in the beginning and 331.4MB in the end (delta: 123.7MB). Free memory was 168.4MB in the beginning and 212.6MB in the end (delta: -44.2MB). Peak memory consumption was 183.3MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 677]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 138 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 15.5s, OverallIterations: 22, TraceHistogramMax: 16, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.1s, AutomataDifference: 4.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1179 SdHoareTripleChecker+Valid, 3.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1179 mSDsluCounter, 7185 SdHoareTripleChecker+Invalid, 2.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2961 mSDsCounter, 367 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2341 IncrementalHoareTripleChecker+Invalid, 2708 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 367 mSolverCounterUnsat, 4224 mSDtfsCounter, 2341 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 10764 GetRequests, 10731 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=4017occurred in iteration=19, InterpolantAutomatonStates: 75, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.8s AutomataMinimizationTime, 22 MinimizatonAttempts, 2234 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 1.3s SatisfiabilityAnalysisTime, 2.9s InterpolantComputationTime, 5400 NumberOfCodeBlocks, 5400 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 10756 ConstructedInterpolants, 0 QuantifiedInterpolants, 14227 SizeOfPredicates, 2 NumberOfNonLiveVariables, 6191 ConjunctsInSsa, 49 ConjunctsInUnsatCore, 44 InterpolantComputations, 40 PerfectInterpolantSequences, 35446/35550 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 109]: Loop Invariant Derived loop invariant: ((((((((((((((((((((blastFlag == 2) && (s__s3__tmp__next_state___0 == 8576)) && (8592 == s__state)) || (((blastFlag == 2) && (s__s3__tmp__next_state___0 == 8576)) && (8608 == s__state))) || (((blastFlag == 2) && (8656 == s__state)) && (s__s3__tmp__next_state___0 != 8640))) || (((blastFlag == 2) && (8466 == s__state)) && (s__s3__tmp__next_state___0 != 8640))) || (((blastFlag == 2) && (s__s3__tmp__next_state___0 == 8576)) && (8640 == s__state))) || ((blastFlag == 2) && (8512 == s__state))) || (((8448 == s__state) && (blastFlag == 2)) && (s__s3__tmp__next_state___0 == 8576))) || ((blastFlag != 4) && (0 != s__hit))) || ((blastFlag == 2) && (8560 == s__state))) || (((8448 == s__state) && (s__s3__tmp__next_state___0 == 3)) && (blastFlag == 3))) || ((blastFlag == 0) && (8464 == s__state))) || (((8672 == s__state) && (s__s3__tmp__next_state___0 != 8640)) && (blastFlag == 3))) || ((blastFlag == 1) && (8496 == s__state))) || (3 == s__state)) || ((blastFlag == 2) && (8544 == s__state))) || (((blastFlag == 2) && (s__s3__tmp__next_state___0 != 8640)) && (8496 == s__state))) || ((blastFlag == 2) && (8528 == s__state))) || (((blastFlag == 2) && (s__s3__tmp__next_state___0 == 8576)) && (8576 == s__state))) RESULT: Ultimate proved your program to be correct! [2024-10-31 19:33:03,567 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...