/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_2a.BV.c.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.5-dev-356b6ba-m [2024-10-31 19:32:29,447 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-31 19:32:29,522 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 19:32:29,526 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-31 19:32:29,527 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-31 19:32:29,554 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-31 19:32:29,554 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-31 19:32:29,554 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-31 19:32:29,555 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-31 19:32:29,555 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-31 19:32:29,556 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-31 19:32:29,556 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-31 19:32:29,556 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-31 19:32:29,557 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-31 19:32:29,557 INFO L153 SettingsManager]: * Use SBE=true [2024-10-31 19:32:29,557 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-31 19:32:29,558 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-31 19:32:29,558 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-31 19:32:29,558 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-31 19:32:29,559 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-31 19:32:29,559 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-31 19:32:29,560 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-31 19:32:29,561 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-31 19:32:29,561 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-31 19:32:29,561 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-10-31 19:32:29,561 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-31 19:32:29,562 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-10-31 19:32:29,562 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-31 19:32:29,562 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-31 19:32:29,563 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-31 19:32:29,563 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-31 19:32:29,563 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-31 19:32:29,563 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-31 19:32:29,564 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-31 19:32:29,564 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 19:32:29,564 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-31 19:32:29,565 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-31 19:32:29,565 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-31 19:32:29,565 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2024-10-31 19:32:29,565 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-10-31 19:32:29,566 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-31 19:32:29,566 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-31 19:32:29,566 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-31 19:32:29,567 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-31 19:32:29,567 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2024-10-31 19:32:29,567 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Allow undefined functions -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Command for external solver -> cvc4 --incremental --print-success --lang smt [2024-10-31 19:32:29,899 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-31 19:32:29,920 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-31 19:32:29,922 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-31 19:32:29,923 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-31 19:32:29,924 INFO L274 PluginConnector]: CDTParser initialized [2024-10-31 19:32:29,925 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/s3_srvr_2a.BV.c.cil.c [2024-10-31 19:32:31,383 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-31 19:32:31,595 INFO L384 CDTParser]: Found 1 translation units. [2024-10-31 19:32:31,596 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/bitvector/s3_srvr_2a.BV.c.cil.c [2024-10-31 19:32:31,613 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5517e3fc2/2ec473b704a5405d8d7b75eb4831f4ef/FLAGc93ca931f [2024-10-31 19:32:31,629 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5517e3fc2/2ec473b704a5405d8d7b75eb4831f4ef [2024-10-31 19:32:31,636 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-31 19:32:31,637 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-10-31 19:32:31,638 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-31 19:32:31,638 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-31 19:32:31,643 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-31 19:32:31,643 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 07:32:31" (1/1) ... [2024-10-31 19:32:31,644 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50c34ef1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 07:32:31, skipping insertion in model container [2024-10-31 19:32:31,644 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 07:32:31" (1/1) ... [2024-10-31 19:32:31,691 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-31 19:32:31,919 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_2a.BV.c.cil.c[44872,44885] [2024-10-31 19:32:31,933 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 19:32:31,947 INFO L200 MainTranslator]: Completed pre-run [2024-10-31 19:32:31,990 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_2a.BV.c.cil.c[44872,44885] [2024-10-31 19:32:31,993 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 19:32:32,015 INFO L204 MainTranslator]: Completed translation [2024-10-31 19:32:32,016 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 07:32:32 WrapperNode [2024-10-31 19:32:32,016 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-31 19:32:32,017 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-31 19:32:32,017 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-31 19:32:32,017 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-31 19:32:32,022 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 07:32:32" (1/1) ... [2024-10-31 19:32:32,032 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 07:32:32" (1/1) ... [2024-10-31 19:32:32,065 INFO L138 Inliner]: procedures = 15, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 525 [2024-10-31 19:32:32,066 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-31 19:32:32,066 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-31 19:32:32,066 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-31 19:32:32,067 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-31 19:32:32,074 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 07:32:32" (1/1) ... [2024-10-31 19:32:32,074 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 07:32:32" (1/1) ... [2024-10-31 19:32:32,078 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 07:32:32" (1/1) ... [2024-10-31 19:32:32,099 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 19:32:32,099 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 07:32:32" (1/1) ... [2024-10-31 19:32:32,099 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 07:32:32" (1/1) ... [2024-10-31 19:32:32,113 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 07:32:32" (1/1) ... [2024-10-31 19:32:32,125 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 07:32:32" (1/1) ... [2024-10-31 19:32:32,127 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 07:32:32" (1/1) ... [2024-10-31 19:32:32,129 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 07:32:32" (1/1) ... [2024-10-31 19:32:32,136 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-31 19:32:32,137 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-31 19:32:32,137 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-31 19:32:32,137 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-31 19:32:32,137 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 07:32:32" (1/1) ... [2024-10-31 19:32:32,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 19:32:32,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-31 19:32:32,181 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 19:32:32,188 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 19:32:32,208 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-31 19:32:32,208 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-10-31 19:32:32,208 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-31 19:32:32,208 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-31 19:32:32,286 INFO L238 CfgBuilder]: Building ICFG [2024-10-31 19:32:32,288 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-31 19:32:32,305 WARN L781 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2024-10-31 19:32:32,815 INFO L735 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2024-10-31 19:32:32,816 INFO L735 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2024-10-31 19:32:32,874 INFO L? ?]: Removed 118 outVars from TransFormulas that were not future-live. [2024-10-31 19:32:32,874 INFO L287 CfgBuilder]: Performing block encoding [2024-10-31 19:32:32,891 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-31 19:32:32,891 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-10-31 19:32:32,892 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 07:32:32 BoogieIcfgContainer [2024-10-31 19:32:32,892 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-31 19:32:32,896 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-31 19:32:32,896 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-31 19:32:32,899 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-31 19:32:32,899 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.10 07:32:31" (1/3) ... [2024-10-31 19:32:32,900 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28958c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 07:32:32, skipping insertion in model container [2024-10-31 19:32:32,900 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 07:32:32" (2/3) ... [2024-10-31 19:32:32,900 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28958c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 07:32:32, skipping insertion in model container [2024-10-31 19:32:32,901 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 07:32:32" (3/3) ... [2024-10-31 19:32:32,902 INFO L112 eAbstractionObserver]: Analyzing ICFG s3_srvr_2a.BV.c.cil.c [2024-10-31 19:32:32,917 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-31 19:32:32,917 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-31 19:32:32,981 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-31 19:32:32,987 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;@a883030, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-31 19:32:32,987 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-31 19:32:32,992 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 19:32:33,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-10-31 19:32:33,028 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 19:32:33,029 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 19:32:33,029 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 19:32:33,035 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 19:32:33,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1632002022, now seen corresponding path program 1 times [2024-10-31 19:32:33,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 19:32:33,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [401918885] [2024-10-31 19:32:33,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 19:32:33,048 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-10-31 19:32:33,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-10-31 19:32:33,051 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 19:32:33,056 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 19:32:33,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 19:32:33,174 INFO L255 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-31 19:32:33,179 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 19:32:33,246 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 19:32:33,246 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 19:32:33,287 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 19:32:33,290 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 19:32:33,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [401918885] [2024-10-31 19:32:33,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [401918885] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 19:32:33,291 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 19:32:33,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2024-10-31 19:32:33,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286940460] [2024-10-31 19:32:33,293 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 19:32:33,298 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 19:32:33,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 19:32:33,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 19:32:33,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 19:32:33,323 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 19:32:33,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 19:32:33,541 INFO L93 Difference]: Finished difference Result 275 states and 473 transitions. [2024-10-31 19:32:33,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 19:32:33,544 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 19:32:33,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 19:32:33,553 INFO L225 Difference]: With dead ends: 275 [2024-10-31 19:32:33,553 INFO L226 Difference]: Without dead ends: 125 [2024-10-31 19:32:33,557 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 19:32:33,562 INFO L432 NwaCegarLoop]: 211 mSDtfsCounter, 8 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-31 19:32:33,563 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 325 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-31 19:32:33,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2024-10-31 19:32:33,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2024-10-31 19:32:33,597 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 19:32:33,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 185 transitions. [2024-10-31 19:32:33,599 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 185 transitions. Word has length 44 [2024-10-31 19:32:33,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 19:32:33,599 INFO L471 AbstractCegarLoop]: Abstraction has 125 states and 185 transitions. [2024-10-31 19:32:33,600 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 19:32:33,600 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 185 transitions. [2024-10-31 19:32:33,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-10-31 19:32:33,602 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 19:32:33,602 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 19:32:33,604 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (2)] Ended with exit code 0 [2024-10-31 19:32:33,802 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 19:32:33,803 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 19:32:33,803 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 19:32:33,804 INFO L85 PathProgramCache]: Analyzing trace with hash 2033157093, now seen corresponding path program 1 times [2024-10-31 19:32:33,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 19:32:33,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2010090433] [2024-10-31 19:32:33,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 19:32:33,804 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-10-31 19:32:33,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-10-31 19:32:33,806 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 19:32:33,807 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 19:32:33,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 19:32:33,897 INFO L255 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-31 19:32:33,899 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 19:32:34,005 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 19:32:34,005 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 19:32:34,098 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 19:32:34,099 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 19:32:34,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2010090433] [2024-10-31 19:32:34,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [2010090433] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 19:32:34,099 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 19:32:34,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2024-10-31 19:32:34,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175610197] [2024-10-31 19:32:34,100 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 19:32:34,102 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 19:32:34,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 19:32:34,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 19:32:34,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-31 19:32:34,103 INFO L87 Difference]: Start difference. First operand 125 states and 185 transitions. Second operand has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 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 19:32:34,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 19:32:34,185 INFO L93 Difference]: Finished difference Result 432 states and 659 transitions. [2024-10-31 19:32:34,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 19:32:34,185 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 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 19:32:34,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 19:32:34,188 INFO L225 Difference]: With dead ends: 432 [2024-10-31 19:32:34,188 INFO L226 Difference]: Without dead ends: 326 [2024-10-31 19:32:34,189 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 116 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 19:32:34,190 INFO L432 NwaCegarLoop]: 177 mSDtfsCounter, 346 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 346 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 19:32:34,190 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [346 Valid, 487 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 19:32:34,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2024-10-31 19:32:34,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 326. [2024-10-31 19:32:34,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 1.5138461538461538) internal successors, (492), 325 states have internal predecessors, (492), 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 19:32:34,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 492 transitions. [2024-10-31 19:32:34,219 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 492 transitions. Word has length 60 [2024-10-31 19:32:34,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 19:32:34,220 INFO L471 AbstractCegarLoop]: Abstraction has 326 states and 492 transitions. [2024-10-31 19:32:34,220 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 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 19:32:34,220 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 492 transitions. [2024-10-31 19:32:34,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2024-10-31 19:32:34,224 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 19:32:34,224 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, 1] [2024-10-31 19:32:34,228 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (3)] Ended with exit code 0 [2024-10-31 19:32:34,424 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 19:32:34,425 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 19:32:34,425 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 19:32:34,426 INFO L85 PathProgramCache]: Analyzing trace with hash -1976048908, now seen corresponding path program 1 times [2024-10-31 19:32:34,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 19:32:34,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [742008763] [2024-10-31 19:32:34,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 19:32:34,426 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-10-31 19:32:34,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-10-31 19:32:34,429 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 19:32:34,431 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 19:32:34,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 19:32:34,523 INFO L255 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-31 19:32:34,525 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 19:32:34,559 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-31 19:32:34,560 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 19:32:34,595 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-31 19:32:34,595 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 19:32:34,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [742008763] [2024-10-31 19:32:34,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [742008763] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 19:32:34,596 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 19:32:34,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2024-10-31 19:32:34,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355579090] [2024-10-31 19:32:34,596 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 19:32:34,597 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 19:32:34,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 19:32:34,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 19:32:34,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 19:32:34,598 INFO L87 Difference]: Start difference. First operand 326 states and 492 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 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 19:32:34,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 19:32:34,616 INFO L93 Difference]: Finished difference Result 635 states and 964 transitions. [2024-10-31 19:32:34,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 19:32:34,617 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 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 82 [2024-10-31 19:32:34,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 19:32:34,618 INFO L225 Difference]: With dead ends: 635 [2024-10-31 19:32:34,618 INFO L226 Difference]: Without dead ends: 328 [2024-10-31 19:32:34,620 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 161 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 19:32:34,621 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 19:32:34,622 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 19:32:34,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2024-10-31 19:32:34,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 328. [2024-10-31 19:32:34,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 1.510703363914373) internal successors, (494), 327 states have internal predecessors, (494), 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 19:32:34,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 494 transitions. [2024-10-31 19:32:34,638 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 494 transitions. Word has length 82 [2024-10-31 19:32:34,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 19:32:34,639 INFO L471 AbstractCegarLoop]: Abstraction has 328 states and 494 transitions. [2024-10-31 19:32:34,639 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 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 19:32:34,639 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 494 transitions. [2024-10-31 19:32:34,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2024-10-31 19:32:34,643 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 19:32:34,643 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:32:34,647 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (4)] Ended with exit code 0 [2024-10-31 19:32:34,843 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 19:32:34,844 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 19:32:34,844 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 19:32:34,845 INFO L85 PathProgramCache]: Analyzing trace with hash -1614320406, now seen corresponding path program 1 times [2024-10-31 19:32:34,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 19:32:34,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1264658091] [2024-10-31 19:32:34,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 19:32:34,845 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-10-31 19:32:34,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-10-31 19:32:34,848 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 19:32:34,848 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 19:32:35,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 19:32:35,023 INFO L255 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-31 19:32:35,027 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 19:32:35,102 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-10-31 19:32:35,102 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 19:32:35,178 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-10-31 19:32:35,181 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 19:32:35,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1264658091] [2024-10-31 19:32:35,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1264658091] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 19:32:35,182 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 19:32:35,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2024-10-31 19:32:35,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414070999] [2024-10-31 19:32:35,182 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 19:32:35,183 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 19:32:35,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 19:32:35,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 19:32:35,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 19:32:35,184 INFO L87 Difference]: Start difference. First operand 328 states and 494 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 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 19:32:35,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 19:32:35,359 INFO L93 Difference]: Finished difference Result 760 states and 1181 transitions. [2024-10-31 19:32:35,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 19:32:35,360 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 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 103 [2024-10-31 19:32:35,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 19:32:35,362 INFO L225 Difference]: With dead ends: 760 [2024-10-31 19:32:35,362 INFO L226 Difference]: Without dead ends: 453 [2024-10-31 19:32:35,364 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 203 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 19:32:35,365 INFO L432 NwaCegarLoop]: 185 mSDtfsCounter, 10 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 272 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 19:32:35,366 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 272 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-31 19:32:35,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2024-10-31 19:32:35,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 453. [2024-10-31 19:32:35,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 452 states have (on average 1.4026548672566372) internal successors, (634), 452 states have internal predecessors, (634), 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 19:32:35,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 634 transitions. [2024-10-31 19:32:35,395 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 634 transitions. Word has length 103 [2024-10-31 19:32:35,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 19:32:35,396 INFO L471 AbstractCegarLoop]: Abstraction has 453 states and 634 transitions. [2024-10-31 19:32:35,396 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 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 19:32:35,396 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 634 transitions. [2024-10-31 19:32:35,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2024-10-31 19:32:35,399 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 19:32:35,399 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:32:35,403 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 19:32:35,599 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 19:32:35,600 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 19:32:35,600 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 19:32:35,600 INFO L85 PathProgramCache]: Analyzing trace with hash -1420566810, now seen corresponding path program 1 times [2024-10-31 19:32:35,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 19:32:35,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1615527066] [2024-10-31 19:32:35,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 19:32:35,601 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-10-31 19:32:35,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-10-31 19:32:35,604 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 19:32:35,605 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 19:32:35,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 19:32:35,727 INFO L255 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-31 19:32:35,730 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 19:32:35,779 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-10-31 19:32:35,780 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 19:32:35,825 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-10-31 19:32:35,826 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 19:32:35,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1615527066] [2024-10-31 19:32:35,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1615527066] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 19:32:35,826 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 19:32:35,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2024-10-31 19:32:35,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879338221] [2024-10-31 19:32:35,829 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 19:32:35,830 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 19:32:35,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 19:32:35,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 19:32:35,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 19:32:35,831 INFO L87 Difference]: Start difference. First operand 453 states and 634 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 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 19:32:35,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 19:32:35,974 INFO L93 Difference]: Finished difference Result 931 states and 1317 transitions. [2024-10-31 19:32:35,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 19:32:35,975 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 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 103 [2024-10-31 19:32:35,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 19:32:35,978 INFO L225 Difference]: With dead ends: 931 [2024-10-31 19:32:35,978 INFO L226 Difference]: Without dead ends: 499 [2024-10-31 19:32:35,979 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 203 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 19:32:35,980 INFO L432 NwaCegarLoop]: 186 mSDtfsCounter, 9 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 273 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 19:32:35,980 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 273 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 19:32:35,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2024-10-31 19:32:35,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 499. [2024-10-31 19:32:35,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 498 states have (on average 1.3855421686746987) internal successors, (690), 498 states have internal predecessors, (690), 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 19:32:35,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 690 transitions. [2024-10-31 19:32:35,994 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 690 transitions. Word has length 103 [2024-10-31 19:32:35,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 19:32:35,994 INFO L471 AbstractCegarLoop]: Abstraction has 499 states and 690 transitions. [2024-10-31 19:32:35,994 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 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 19:32:35,994 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 690 transitions. [2024-10-31 19:32:35,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2024-10-31 19:32:35,996 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 19:32:35,996 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 3, 3, 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] [2024-10-31 19:32:36,001 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 19:32:36,197 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 19:32:36,197 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 19:32:36,197 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 19:32:36,198 INFO L85 PathProgramCache]: Analyzing trace with hash 1506722242, now seen corresponding path program 1 times [2024-10-31 19:32:36,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 19:32:36,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [779750500] [2024-10-31 19:32:36,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 19:32:36,198 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-10-31 19:32:36,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-10-31 19:32:36,199 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 19:32:36,200 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 19:32:36,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 19:32:36,302 INFO L255 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-31 19:32:36,305 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 19:32:36,345 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2024-10-31 19:32:36,345 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 19:32:36,378 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2024-10-31 19:32:36,378 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 19:32:36,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [779750500] [2024-10-31 19:32:36,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [779750500] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 19:32:36,379 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 19:32:36,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2024-10-31 19:32:36,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192082938] [2024-10-31 19:32:36,379 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 19:32:36,379 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 19:32:36,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 19:32:36,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 19:32:36,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 19:32:36,380 INFO L87 Difference]: Start difference. First operand 499 states and 690 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 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 19:32:36,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 19:32:36,506 INFO L93 Difference]: Finished difference Result 1052 states and 1478 transitions. [2024-10-31 19:32:36,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 19:32:36,507 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 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 143 [2024-10-31 19:32:36,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 19:32:36,509 INFO L225 Difference]: With dead ends: 1052 [2024-10-31 19:32:36,509 INFO L226 Difference]: Without dead ends: 574 [2024-10-31 19:32:36,510 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 283 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 19:32:36,511 INFO L432 NwaCegarLoop]: 185 mSDtfsCounter, 9 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 19:32:36,511 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 272 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 19:32:36,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2024-10-31 19:32:36,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 574. [2024-10-31 19:32:36,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 574 states, 573 states have (on average 1.361256544502618) internal successors, (780), 573 states have internal predecessors, (780), 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 19:32:36,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 780 transitions. [2024-10-31 19:32:36,523 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 780 transitions. Word has length 143 [2024-10-31 19:32:36,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 19:32:36,523 INFO L471 AbstractCegarLoop]: Abstraction has 574 states and 780 transitions. [2024-10-31 19:32:36,523 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 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 19:32:36,523 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 780 transitions. [2024-10-31 19:32:36,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2024-10-31 19:32:36,525 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 19:32:36,525 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2024-10-31 19:32:36,529 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2024-10-31 19:32:36,728 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 19:32:36,729 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 19:32:36,730 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 19:32:36,730 INFO L85 PathProgramCache]: Analyzing trace with hash 1067369758, now seen corresponding path program 1 times [2024-10-31 19:32:36,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 19:32:36,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [184052216] [2024-10-31 19:32:36,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 19:32:36,730 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-10-31 19:32:36,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-10-31 19:32:36,732 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 19:32:36,733 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 19:32:36,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 19:32:36,845 INFO L255 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-31 19:32:36,848 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 19:32:36,878 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 209 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2024-10-31 19:32:36,878 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 19:32:36,912 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 209 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2024-10-31 19:32:36,913 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 19:32:36,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [184052216] [2024-10-31 19:32:36,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [184052216] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 19:32:36,914 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 19:32:36,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2024-10-31 19:32:36,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234610010] [2024-10-31 19:32:36,914 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 19:32:36,915 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 19:32:36,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 19:32:36,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 19:32:36,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-31 19:32:36,916 INFO L87 Difference]: Start difference. First operand 574 states and 780 transitions. Second operand has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 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 19:32:37,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 19:32:37,153 INFO L93 Difference]: Finished difference Result 1316 states and 1859 transitions. [2024-10-31 19:32:37,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 19:32:37,153 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 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 183 [2024-10-31 19:32:37,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 19:32:37,156 INFO L225 Difference]: With dead ends: 1316 [2024-10-31 19:32:37,156 INFO L226 Difference]: Without dead ends: 763 [2024-10-31 19:32:37,157 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 362 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 19:32:37,158 INFO L432 NwaCegarLoop]: 142 mSDtfsCounter, 75 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-31 19:32:37,158 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 309 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-31 19:32:37,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 763 states. [2024-10-31 19:32:37,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 763 to 763. [2024-10-31 19:32:37,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 763 states, 762 states have (on average 1.3346456692913387) internal successors, (1017), 762 states have internal predecessors, (1017), 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 19:32:37,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 763 states to 763 states and 1017 transitions. [2024-10-31 19:32:37,173 INFO L78 Accepts]: Start accepts. Automaton has 763 states and 1017 transitions. Word has length 183 [2024-10-31 19:32:37,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 19:32:37,173 INFO L471 AbstractCegarLoop]: Abstraction has 763 states and 1017 transitions. [2024-10-31 19:32:37,173 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 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 19:32:37,173 INFO L276 IsEmpty]: Start isEmpty. Operand 763 states and 1017 transitions. [2024-10-31 19:32:37,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2024-10-31 19:32:37,175 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 19:32:37,176 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 19:32:37,179 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 19:32:37,376 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 19:32:37,377 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 19:32:37,377 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 19:32:37,377 INFO L85 PathProgramCache]: Analyzing trace with hash -1593648090, now seen corresponding path program 1 times [2024-10-31 19:32:37,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 19:32:37,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [194858951] [2024-10-31 19:32:37,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 19:32:37,378 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-10-31 19:32:37,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-10-31 19:32:37,380 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 19:32:37,381 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 19:32:37,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 19:32:37,495 INFO L255 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-31 19:32:37,497 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 19:32:37,608 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 250 proven. 0 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2024-10-31 19:32:37,608 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 19:32:37,706 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 250 proven. 0 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2024-10-31 19:32:37,706 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 19:32:37,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [194858951] [2024-10-31 19:32:37,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [194858951] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 19:32:37,707 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 19:32:37,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2024-10-31 19:32:37,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110886454] [2024-10-31 19:32:37,707 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 19:32:37,708 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 19:32:37,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 19:32:37,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 19:32:37,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 19:32:37,708 INFO L87 Difference]: Start difference. First operand 763 states and 1017 transitions. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 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 19:32:37,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 19:32:37,742 INFO L93 Difference]: Finished difference Result 2014 states and 2684 transitions. [2024-10-31 19:32:37,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 19:32:37,742 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 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 190 [2024-10-31 19:32:37,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 19:32:37,748 INFO L225 Difference]: With dead ends: 2014 [2024-10-31 19:32:37,748 INFO L226 Difference]: Without dead ends: 1272 [2024-10-31 19:32:37,749 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 377 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 19:32:37,750 INFO L432 NwaCegarLoop]: 324 mSDtfsCounter, 121 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 491 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 19:32:37,750 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 491 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 19:32:37,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1272 states. [2024-10-31 19:32:37,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1272 to 1270. [2024-10-31 19:32:37,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1270 states, 1269 states have (on average 1.3270291568163908) internal successors, (1684), 1269 states have internal predecessors, (1684), 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 19:32:37,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1270 states to 1270 states and 1684 transitions. [2024-10-31 19:32:37,776 INFO L78 Accepts]: Start accepts. Automaton has 1270 states and 1684 transitions. Word has length 190 [2024-10-31 19:32:37,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 19:32:37,776 INFO L471 AbstractCegarLoop]: Abstraction has 1270 states and 1684 transitions. [2024-10-31 19:32:37,776 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 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 19:32:37,776 INFO L276 IsEmpty]: Start isEmpty. Operand 1270 states and 1684 transitions. [2024-10-31 19:32:37,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2024-10-31 19:32:37,779 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 19:32:37,779 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 6, 5, 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] [2024-10-31 19:32:37,783 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 19:32:37,980 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 19:32:37,980 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 19:32:37,980 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 19:32:37,981 INFO L85 PathProgramCache]: Analyzing trace with hash 1424822763, now seen corresponding path program 1 times [2024-10-31 19:32:37,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 19:32:37,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [582375798] [2024-10-31 19:32:37,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 19:32:37,981 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-10-31 19:32:37,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-10-31 19:32:37,984 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 19:32:37,985 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 19:32:38,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 19:32:38,104 INFO L255 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-31 19:32:38,106 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 19:32:38,143 INFO L134 CoverageAnalysis]: Checked inductivity of 457 backedges. 120 proven. 0 refuted. 0 times theorem prover too weak. 337 trivial. 0 not checked. [2024-10-31 19:32:38,143 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 19:32:38,176 INFO L134 CoverageAnalysis]: Checked inductivity of 457 backedges. 120 proven. 0 refuted. 0 times theorem prover too weak. 337 trivial. 0 not checked. [2024-10-31 19:32:38,176 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 19:32:38,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [582375798] [2024-10-31 19:32:38,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [582375798] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 19:32:38,177 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 19:32:38,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2024-10-31 19:32:38,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734925241] [2024-10-31 19:32:38,177 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 19:32:38,178 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 19:32:38,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 19:32:38,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 19:32:38,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 19:32:38,178 INFO L87 Difference]: Start difference. First operand 1270 states and 1684 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 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 19:32:38,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 19:32:38,309 INFO L93 Difference]: Finished difference Result 2654 states and 3563 transitions. [2024-10-31 19:32:38,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 19:32:38,309 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 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 196 [2024-10-31 19:32:38,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 19:32:38,314 INFO L225 Difference]: With dead ends: 2654 [2024-10-31 19:32:38,314 INFO L226 Difference]: Without dead ends: 1405 [2024-10-31 19:32:38,316 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 389 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 19:32:38,318 INFO L432 NwaCegarLoop]: 185 mSDtfsCounter, 9 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 19:32:38,318 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 272 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 19:32:38,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1405 states. [2024-10-31 19:32:38,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1405 to 1405. [2024-10-31 19:32:38,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1405 states, 1404 states have (on average 1.3133903133903133) internal successors, (1844), 1404 states have internal predecessors, (1844), 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 19:32:38,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1405 states to 1405 states and 1844 transitions. [2024-10-31 19:32:38,366 INFO L78 Accepts]: Start accepts. Automaton has 1405 states and 1844 transitions. Word has length 196 [2024-10-31 19:32:38,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 19:32:38,366 INFO L471 AbstractCegarLoop]: Abstraction has 1405 states and 1844 transitions. [2024-10-31 19:32:38,366 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 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 19:32:38,366 INFO L276 IsEmpty]: Start isEmpty. Operand 1405 states and 1844 transitions. [2024-10-31 19:32:38,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2024-10-31 19:32:38,370 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 19:32:38,370 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2024-10-31 19:32:38,375 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 19:32:38,571 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 19:32:38,571 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 19:32:38,571 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 19:32:38,572 INFO L85 PathProgramCache]: Analyzing trace with hash -222886975, now seen corresponding path program 1 times [2024-10-31 19:32:38,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 19:32:38,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1821528466] [2024-10-31 19:32:38,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 19:32:38,572 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-10-31 19:32:38,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-10-31 19:32:38,574 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 19:32:38,576 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 19:32:38,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 19:32:38,696 INFO L255 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-31 19:32:38,698 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 19:32:38,730 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 303 proven. 0 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2024-10-31 19:32:38,730 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 19:32:38,765 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 303 proven. 0 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2024-10-31 19:32:38,765 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 19:32:38,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1821528466] [2024-10-31 19:32:38,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1821528466] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 19:32:38,765 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 19:32:38,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2024-10-31 19:32:38,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320389707] [2024-10-31 19:32:38,766 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 19:32:38,766 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 19:32:38,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 19:32:38,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 19:32:38,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-31 19:32:38,767 INFO L87 Difference]: Start difference. First operand 1405 states and 1844 transitions. Second operand has 4 states, 4 states have (on average 38.25) internal successors, (153), 4 states have internal predecessors, (153), 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 19:32:38,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 19:32:38,951 INFO L93 Difference]: Finished difference Result 3054 states and 4098 transitions. [2024-10-31 19:32:38,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 19:32:38,951 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.25) internal successors, (153), 4 states have internal predecessors, (153), 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 226 [2024-10-31 19:32:38,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 19:32:38,958 INFO L225 Difference]: With dead ends: 3054 [2024-10-31 19:32:38,958 INFO L226 Difference]: Without dead ends: 1670 [2024-10-31 19:32:38,960 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 450 GetRequests, 448 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 19:32:38,960 INFO L432 NwaCegarLoop]: 121 mSDtfsCounter, 63 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-31 19:32:38,961 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 216 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-31 19:32:38,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1670 states. [2024-10-31 19:32:38,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1670 to 1670. [2024-10-31 19:32:38,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1670 states, 1669 states have (on average 1.3145596165368485) internal successors, (2194), 1669 states have internal predecessors, (2194), 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 19:32:38,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1670 states to 1670 states and 2194 transitions. [2024-10-31 19:32:38,994 INFO L78 Accepts]: Start accepts. Automaton has 1670 states and 2194 transitions. Word has length 226 [2024-10-31 19:32:38,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 19:32:38,995 INFO L471 AbstractCegarLoop]: Abstraction has 1670 states and 2194 transitions. [2024-10-31 19:32:38,995 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.25) internal successors, (153), 4 states have internal predecessors, (153), 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 19:32:38,995 INFO L276 IsEmpty]: Start isEmpty. Operand 1670 states and 2194 transitions. [2024-10-31 19:32:38,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2024-10-31 19:32:38,999 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 19:32:39,000 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2024-10-31 19:32:39,003 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 19:32:39,201 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 19:32:39,201 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 19:32:39,201 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 19:32:39,201 INFO L85 PathProgramCache]: Analyzing trace with hash -482554043, now seen corresponding path program 1 times [2024-10-31 19:32:39,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 19:32:39,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [679384776] [2024-10-31 19:32:39,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 19:32:39,202 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-10-31 19:32:39,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-10-31 19:32:39,205 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 19:32:39,206 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 19:32:39,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 19:32:39,346 INFO L255 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-31 19:32:39,348 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 19:32:39,419 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 430 proven. 16 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2024-10-31 19:32:39,420 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 19:32:39,495 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 430 proven. 16 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2024-10-31 19:32:39,495 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 19:32:39,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [679384776] [2024-10-31 19:32:39,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [679384776] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 19:32:39,496 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 19:32:39,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2024-10-31 19:32:39,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919260095] [2024-10-31 19:32:39,496 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 19:32:39,497 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-31 19:32:39,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 19:32:39,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-31 19:32:39,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-31 19:32:39,498 INFO L87 Difference]: Start difference. First operand 1670 states and 2194 transitions. Second operand has 6 states, 6 states have (on average 34.333333333333336) internal successors, (206), 6 states have internal predecessors, (206), 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 19:32:40,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 19:32:40,283 INFO L93 Difference]: Finished difference Result 6615 states and 8938 transitions. [2024-10-31 19:32:40,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-31 19:32:40,284 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 34.333333333333336) internal successors, (206), 6 states have internal predecessors, (206), 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 253 [2024-10-31 19:32:40,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 19:32:40,300 INFO L225 Difference]: With dead ends: 6615 [2024-10-31 19:32:40,301 INFO L226 Difference]: Without dead ends: 4966 [2024-10-31 19:32:40,304 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 512 GetRequests, 504 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2024-10-31 19:32:40,304 INFO L432 NwaCegarLoop]: 335 mSDtfsCounter, 379 mSDsluCounter, 809 mSDsCounter, 0 mSdLazyCounter, 940 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 379 SdHoareTripleChecker+Valid, 1144 SdHoareTripleChecker+Invalid, 991 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 940 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-10-31 19:32:40,305 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [379 Valid, 1144 Invalid, 991 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 940 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-10-31 19:32:40,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4966 states. [2024-10-31 19:32:40,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4966 to 3556. [2024-10-31 19:32:40,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3556 states, 3555 states have (on average 1.3468354430379748) internal successors, (4788), 3555 states have internal predecessors, (4788), 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 19:32:40,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3556 states to 3556 states and 4788 transitions. [2024-10-31 19:32:40,397 INFO L78 Accepts]: Start accepts. Automaton has 3556 states and 4788 transitions. Word has length 253 [2024-10-31 19:32:40,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 19:32:40,397 INFO L471 AbstractCegarLoop]: Abstraction has 3556 states and 4788 transitions. [2024-10-31 19:32:40,397 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 34.333333333333336) internal successors, (206), 6 states have internal predecessors, (206), 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 19:32:40,397 INFO L276 IsEmpty]: Start isEmpty. Operand 3556 states and 4788 transitions. [2024-10-31 19:32:40,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2024-10-31 19:32:40,404 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 19:32:40,404 INFO L215 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 9, 9, 9, 7, 7, 5, 5, 3, 3, 2, 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, 1, 1] [2024-10-31 19:32:40,407 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 19:32:40,604 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 19:32:40,605 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 19:32:40,605 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 19:32:40,605 INFO L85 PathProgramCache]: Analyzing trace with hash 1408816043, now seen corresponding path program 1 times [2024-10-31 19:32:40,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 19:32:40,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [270980133] [2024-10-31 19:32:40,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 19:32:40,606 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-10-31 19:32:40,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-10-31 19:32:40,607 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 19:32:40,607 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 19:32:40,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 19:32:40,745 INFO L255 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-31 19:32:40,748 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 19:32:40,788 INFO L134 CoverageAnalysis]: Checked inductivity of 888 backedges. 176 proven. 0 refuted. 0 times theorem prover too weak. 712 trivial. 0 not checked. [2024-10-31 19:32:40,788 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 19:32:40,824 INFO L134 CoverageAnalysis]: Checked inductivity of 888 backedges. 176 proven. 0 refuted. 0 times theorem prover too weak. 712 trivial. 0 not checked. [2024-10-31 19:32:40,825 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 19:32:40,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [270980133] [2024-10-31 19:32:40,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [270980133] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 19:32:40,825 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 19:32:40,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2024-10-31 19:32:40,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430469087] [2024-10-31 19:32:40,826 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 19:32:40,826 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 19:32:40,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 19:32:40,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 19:32:40,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 19:32:40,827 INFO L87 Difference]: Start difference. First operand 3556 states and 4788 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 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 19:32:40,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 19:32:40,998 INFO L93 Difference]: Finished difference Result 6666 states and 8968 transitions. [2024-10-31 19:32:40,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 19:32:40,999 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 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 257 [2024-10-31 19:32:40,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 19:32:41,008 INFO L225 Difference]: With dead ends: 6666 [2024-10-31 19:32:41,008 INFO L226 Difference]: Without dead ends: 3131 [2024-10-31 19:32:41,012 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 512 GetRequests, 511 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 19:32:41,013 INFO L432 NwaCegarLoop]: 185 mSDtfsCounter, 9 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 19:32:41,013 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 272 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 19:32:41,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3131 states. [2024-10-31 19:32:41,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3131 to 2440. [2024-10-31 19:32:41,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2440 states, 2439 states have (on average 1.3025830258302582) internal successors, (3177), 2439 states have internal predecessors, (3177), 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 19:32:41,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2440 states to 2440 states and 3177 transitions. [2024-10-31 19:32:41,071 INFO L78 Accepts]: Start accepts. Automaton has 2440 states and 3177 transitions. Word has length 257 [2024-10-31 19:32:41,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 19:32:41,072 INFO L471 AbstractCegarLoop]: Abstraction has 2440 states and 3177 transitions. [2024-10-31 19:32:41,072 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 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 19:32:41,072 INFO L276 IsEmpty]: Start isEmpty. Operand 2440 states and 3177 transitions. [2024-10-31 19:32:41,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2024-10-31 19:32:41,078 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 19:32:41,078 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 8, 8, 8, 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, 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] [2024-10-31 19:32:41,082 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 19:32:41,278 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 19:32:41,279 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 19:32:41,279 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 19:32:41,279 INFO L85 PathProgramCache]: Analyzing trace with hash -1838119628, now seen corresponding path program 1 times [2024-10-31 19:32:41,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 19:32:41,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1561051130] [2024-10-31 19:32:41,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 19:32:41,280 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-10-31 19:32:41,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-10-31 19:32:41,282 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 19:32:41,284 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 19:32:41,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 19:32:41,445 INFO L255 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-31 19:32:41,448 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 19:32:41,477 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 535 proven. 0 refuted. 0 times theorem prover too weak. 365 trivial. 0 not checked. [2024-10-31 19:32:41,477 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 19:32:41,504 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 535 proven. 0 refuted. 0 times theorem prover too weak. 365 trivial. 0 not checked. [2024-10-31 19:32:41,504 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 19:32:41,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1561051130] [2024-10-31 19:32:41,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1561051130] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 19:32:41,505 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 19:32:41,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2024-10-31 19:32:41,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315395698] [2024-10-31 19:32:41,505 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 19:32:41,506 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 19:32:41,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 19:32:41,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 19:32:41,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-31 19:32:41,507 INFO L87 Difference]: Start difference. First operand 2440 states and 3177 transitions. Second operand has 4 states, 4 states have (on average 39.0) internal successors, (156), 4 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 19:32:41,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 19:32:41,715 INFO L93 Difference]: Finished difference Result 4632 states and 6117 transitions. [2024-10-31 19:32:41,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 19:32:41,715 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 39.0) internal successors, (156), 4 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 306 [2024-10-31 19:32:41,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 19:32:41,721 INFO L225 Difference]: With dead ends: 4632 [2024-10-31 19:32:41,721 INFO L226 Difference]: Without dead ends: 1911 [2024-10-31 19:32:41,725 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 610 GetRequests, 608 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 19:32:41,726 INFO L432 NwaCegarLoop]: 148 mSDtfsCounter, 72 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-31 19:32:41,726 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 246 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-31 19:32:41,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1911 states. [2024-10-31 19:32:41,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1911 to 1739. [2024-10-31 19:32:41,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1739 states, 1738 states have (on average 1.284234752589183) internal successors, (2232), 1738 states have internal predecessors, (2232), 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 19:32:41,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1739 states to 1739 states and 2232 transitions. [2024-10-31 19:32:41,788 INFO L78 Accepts]: Start accepts. Automaton has 1739 states and 2232 transitions. Word has length 306 [2024-10-31 19:32:41,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 19:32:41,788 INFO L471 AbstractCegarLoop]: Abstraction has 1739 states and 2232 transitions. [2024-10-31 19:32:41,789 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.0) internal successors, (156), 4 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 19:32:41,789 INFO L276 IsEmpty]: Start isEmpty. Operand 1739 states and 2232 transitions. [2024-10-31 19:32:41,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2024-10-31 19:32:41,795 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 19:32:41,795 INFO L215 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 10, 9, 7, 7, 5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 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, 1, 1] [2024-10-31 19:32:41,799 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 19:32:41,995 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 19:32:41,996 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 19:32:41,996 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 19:32:41,996 INFO L85 PathProgramCache]: Analyzing trace with hash -1118640717, now seen corresponding path program 1 times [2024-10-31 19:32:41,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 19:32:41,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [638884929] [2024-10-31 19:32:41,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 19:32:41,997 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-10-31 19:32:41,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-10-31 19:32:41,998 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 19:32:41,999 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 19:32:42,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 19:32:42,149 INFO L255 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-31 19:32:42,153 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 19:32:42,256 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 678 proven. 0 refuted. 0 times theorem prover too weak. 498 trivial. 0 not checked. [2024-10-31 19:32:42,256 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 19:32:42,335 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 678 proven. 0 refuted. 0 times theorem prover too weak. 498 trivial. 0 not checked. [2024-10-31 19:32:42,335 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 19:32:42,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [638884929] [2024-10-31 19:32:42,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [638884929] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 19:32:42,335 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 19:32:42,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2024-10-31 19:32:42,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534388855] [2024-10-31 19:32:42,336 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 19:32:42,336 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 19:32:42,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 19:32:42,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 19:32:42,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 19:32:42,337 INFO L87 Difference]: Start difference. First operand 1739 states and 2232 transitions. Second operand has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 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 19:32:42,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 19:32:42,383 INFO L93 Difference]: Finished difference Result 4987 states and 6360 transitions. [2024-10-31 19:32:42,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 19:32:42,384 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 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 306 [2024-10-31 19:32:42,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 19:32:42,393 INFO L225 Difference]: With dead ends: 4987 [2024-10-31 19:32:42,393 INFO L226 Difference]: Without dead ends: 3359 [2024-10-31 19:32:42,396 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 610 GetRequests, 609 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 19:32:42,396 INFO L432 NwaCegarLoop]: 316 mSDtfsCounter, 122 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 479 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 19:32:42,397 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 479 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 19:32:42,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3359 states. [2024-10-31 19:32:42,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3359 to 3357. [2024-10-31 19:32:42,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3357 states, 3356 states have (on average 1.2756257449344457) internal successors, (4281), 3356 states have internal predecessors, (4281), 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 19:32:42,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3357 states to 3357 states and 4281 transitions. [2024-10-31 19:32:42,467 INFO L78 Accepts]: Start accepts. Automaton has 3357 states and 4281 transitions. Word has length 306 [2024-10-31 19:32:42,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 19:32:42,467 INFO L471 AbstractCegarLoop]: Abstraction has 3357 states and 4281 transitions. [2024-10-31 19:32:42,467 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 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 19:32:42,467 INFO L276 IsEmpty]: Start isEmpty. Operand 3357 states and 4281 transitions. [2024-10-31 19:32:42,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2024-10-31 19:32:42,474 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 19:32:42,475 INFO L215 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 10, 9, 7, 7, 5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 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, 1, 1] [2024-10-31 19:32:42,479 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 19:32:42,676 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 19:32:42,676 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 19:32:42,676 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 19:32:42,677 INFO L85 PathProgramCache]: Analyzing trace with hash -134367989, now seen corresponding path program 1 times [2024-10-31 19:32:42,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 19:32:42,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [382846982] [2024-10-31 19:32:42,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 19:32:42,677 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-10-31 19:32:42,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-10-31 19:32:42,680 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 19:32:42,680 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 19:32:42,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 19:32:42,830 INFO L255 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-31 19:32:42,834 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 19:32:42,982 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 780 proven. 0 refuted. 0 times theorem prover too weak. 397 trivial. 0 not checked. [2024-10-31 19:32:42,983 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 19:32:43,121 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 780 proven. 0 refuted. 0 times theorem prover too weak. 397 trivial. 0 not checked. [2024-10-31 19:32:43,121 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 19:32:43,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [382846982] [2024-10-31 19:32:43,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [382846982] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 19:32:43,121 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 19:32:43,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2024-10-31 19:32:43,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706090071] [2024-10-31 19:32:43,122 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 19:32:43,122 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 19:32:43,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 19:32:43,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 19:32:43,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-31 19:32:43,123 INFO L87 Difference]: Start difference. First operand 3357 states and 4281 transitions. Second operand has 4 states, 4 states have (on average 49.0) internal successors, (196), 4 states have internal predecessors, (196), 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 19:32:43,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 19:32:43,206 INFO L93 Difference]: Finished difference Result 7325 states and 9331 transitions. [2024-10-31 19:32:43,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 19:32:43,207 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 49.0) internal successors, (196), 4 states have internal predecessors, (196), 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 308 [2024-10-31 19:32:43,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 19:32:43,219 INFO L225 Difference]: With dead ends: 7325 [2024-10-31 19:32:43,219 INFO L226 Difference]: Without dead ends: 4817 [2024-10-31 19:32:43,224 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 614 GetRequests, 612 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 19:32:43,224 INFO L432 NwaCegarLoop]: 303 mSDtfsCounter, 208 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 608 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 19:32:43,225 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 608 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 19:32:43,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4817 states. [2024-10-31 19:32:43,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4817 to 4817. [2024-10-31 19:32:43,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4817 states, 4816 states have (on average 1.2759551495016612) internal successors, (6145), 4816 states have internal predecessors, (6145), 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 19:32:43,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4817 states to 4817 states and 6145 transitions. [2024-10-31 19:32:43,334 INFO L78 Accepts]: Start accepts. Automaton has 4817 states and 6145 transitions. Word has length 308 [2024-10-31 19:32:43,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 19:32:43,335 INFO L471 AbstractCegarLoop]: Abstraction has 4817 states and 6145 transitions. [2024-10-31 19:32:43,335 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 49.0) internal successors, (196), 4 states have internal predecessors, (196), 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 19:32:43,335 INFO L276 IsEmpty]: Start isEmpty. Operand 4817 states and 6145 transitions. [2024-10-31 19:32:43,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2024-10-31 19:32:43,345 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 19:32:43,345 INFO L215 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 9, 8, 7, 7, 6, 6, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 19:32:43,348 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (16)] Ended with exit code 0 [2024-10-31 19:32:43,545 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 19:32:43,546 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 19:32:43,546 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 19:32:43,546 INFO L85 PathProgramCache]: Analyzing trace with hash 1515372042, now seen corresponding path program 1 times [2024-10-31 19:32:43,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 19:32:43,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1968451764] [2024-10-31 19:32:43,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 19:32:43,547 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-10-31 19:32:43,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-10-31 19:32:43,548 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 19:32:43,549 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 19:32:43,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 19:32:43,686 INFO L255 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-31 19:32:43,689 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 19:32:43,827 INFO L134 CoverageAnalysis]: Checked inductivity of 1044 backedges. 693 proven. 0 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2024-10-31 19:32:43,827 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 19:32:43,980 INFO L134 CoverageAnalysis]: Checked inductivity of 1044 backedges. 693 proven. 0 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2024-10-31 19:32:43,980 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 19:32:43,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1968451764] [2024-10-31 19:32:43,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1968451764] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 19:32:43,980 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 19:32:43,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2024-10-31 19:32:43,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506471602] [2024-10-31 19:32:43,980 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 19:32:43,981 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 19:32:43,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 19:32:43,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 19:32:43,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 19:32:43,982 INFO L87 Difference]: Start difference. First operand 4817 states and 6145 transitions. Second operand has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 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 19:32:44,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 19:32:44,042 INFO L93 Difference]: Finished difference Result 8783 states and 11177 transitions. [2024-10-31 19:32:44,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 19:32:44,043 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 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 316 [2024-10-31 19:32:44,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 19:32:44,057 INFO L225 Difference]: With dead ends: 8783 [2024-10-31 19:32:44,057 INFO L226 Difference]: Without dead ends: 4493 [2024-10-31 19:32:44,062 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 630 GetRequests, 629 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 19:32:44,063 INFO L432 NwaCegarLoop]: 234 mSDtfsCounter, 15 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 399 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 19:32:44,063 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 399 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 19:32:44,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4493 states. [2024-10-31 19:32:44,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4493 to 3913. [2024-10-31 19:32:44,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3913 states, 3912 states have (on average 1.280674846625767) internal successors, (5010), 3912 states have internal predecessors, (5010), 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 19:32:44,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3913 states to 3913 states and 5010 transitions. [2024-10-31 19:32:44,154 INFO L78 Accepts]: Start accepts. Automaton has 3913 states and 5010 transitions. Word has length 316 [2024-10-31 19:32:44,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 19:32:44,154 INFO L471 AbstractCegarLoop]: Abstraction has 3913 states and 5010 transitions. [2024-10-31 19:32:44,155 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 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 19:32:44,155 INFO L276 IsEmpty]: Start isEmpty. Operand 3913 states and 5010 transitions. [2024-10-31 19:32:44,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 419 [2024-10-31 19:32:44,161 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 19:32:44,162 INFO L215 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 13, 12, 10, 10, 8, 8, 6, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 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] [2024-10-31 19:32:44,165 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 19:32:44,362 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 19:32:44,362 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 19:32:44,363 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 19:32:44,363 INFO L85 PathProgramCache]: Analyzing trace with hash -1396762579, now seen corresponding path program 1 times [2024-10-31 19:32:44,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 19:32:44,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [224880531] [2024-10-31 19:32:44,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 19:32:44,363 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-10-31 19:32:44,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-10-31 19:32:44,366 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 19:32:44,367 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 19:32:44,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 19:32:44,521 INFO L255 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-31 19:32:44,525 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 19:32:44,598 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 1240 proven. 26 refuted. 0 times theorem prover too weak. 750 trivial. 0 not checked. [2024-10-31 19:32:44,599 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 19:32:44,677 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 1240 proven. 26 refuted. 0 times theorem prover too weak. 750 trivial. 0 not checked. [2024-10-31 19:32:44,677 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 19:32:44,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [224880531] [2024-10-31 19:32:44,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [224880531] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 19:32:44,678 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 19:32:44,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2024-10-31 19:32:44,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744072032] [2024-10-31 19:32:44,678 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 19:32:44,679 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 19:32:44,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 19:32:44,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 19:32:44,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 19:32:44,680 INFO L87 Difference]: Start difference. First operand 3913 states and 5010 transitions. Second operand has 4 states, 4 states have (on average 46.5) internal successors, (186), 4 states have internal predecessors, (186), 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 19:32:44,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 19:32:44,988 INFO L93 Difference]: Finished difference Result 11609 states and 14898 transitions. [2024-10-31 19:32:44,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 19:32:44,989 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 46.5) internal successors, (186), 4 states have internal predecessors, (186), 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 418 [2024-10-31 19:32:44,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 19:32:45,007 INFO L225 Difference]: With dead ends: 11609 [2024-10-31 19:32:45,007 INFO L226 Difference]: Without dead ends: 7807 [2024-10-31 19:32:45,011 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 836 GetRequests, 833 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 19:32:45,012 INFO L432 NwaCegarLoop]: 327 mSDtfsCounter, 135 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 645 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-31 19:32:45,012 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 645 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-31 19:32:45,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7807 states. [2024-10-31 19:32:45,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7807 to 5223. [2024-10-31 19:32:45,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5223 states, 5222 states have (on average 1.2975871313672922) internal successors, (6776), 5222 states have internal predecessors, (6776), 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 19:32:45,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5223 states to 5223 states and 6776 transitions. [2024-10-31 19:32:45,128 INFO L78 Accepts]: Start accepts. Automaton has 5223 states and 6776 transitions. Word has length 418 [2024-10-31 19:32:45,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 19:32:45,129 INFO L471 AbstractCegarLoop]: Abstraction has 5223 states and 6776 transitions. [2024-10-31 19:32:45,129 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 46.5) internal successors, (186), 4 states have internal predecessors, (186), 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 19:32:45,129 INFO L276 IsEmpty]: Start isEmpty. Operand 5223 states and 6776 transitions. [2024-10-31 19:32:45,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 479 [2024-10-31 19:32:45,137 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 19:32:45,138 INFO L215 NwaCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 15, 14, 12, 12, 10, 10, 8, 8, 8, 8, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2024-10-31 19:32:45,141 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2024-10-31 19:32:45,338 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 19:32:45,339 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 19:32:45,339 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 19:32:45,339 INFO L85 PathProgramCache]: Analyzing trace with hash 1699211053, now seen corresponding path program 1 times [2024-10-31 19:32:45,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 19:32:45,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1191442] [2024-10-31 19:32:45,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 19:32:45,340 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-10-31 19:32:45,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-10-31 19:32:45,341 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 19:32:45,341 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 19:32:45,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 19:32:45,533 INFO L255 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-31 19:32:45,537 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 19:32:45,563 INFO L134 CoverageAnalysis]: Checked inductivity of 2692 backedges. 1484 proven. 0 refuted. 0 times theorem prover too weak. 1208 trivial. 0 not checked. [2024-10-31 19:32:45,564 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 19:32:45,610 INFO L134 CoverageAnalysis]: Checked inductivity of 2692 backedges. 1484 proven. 0 refuted. 0 times theorem prover too weak. 1208 trivial. 0 not checked. [2024-10-31 19:32:45,610 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 19:32:45,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1191442] [2024-10-31 19:32:45,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1191442] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 19:32:45,610 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 19:32:45,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2024-10-31 19:32:45,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294051569] [2024-10-31 19:32:45,613 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 19:32:45,613 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 19:32:45,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 19:32:45,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 19:32:45,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 19:32:45,614 INFO L87 Difference]: Start difference. First operand 5223 states and 6776 transitions. Second operand has 3 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 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 19:32:45,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 19:32:45,766 INFO L93 Difference]: Finished difference Result 10845 states and 14136 transitions. [2024-10-31 19:32:45,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 19:32:45,767 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 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 478 [2024-10-31 19:32:45,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 19:32:45,776 INFO L225 Difference]: With dead ends: 10845 [2024-10-31 19:32:45,776 INFO L226 Difference]: Without dead ends: 5643 [2024-10-31 19:32:45,781 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 954 GetRequests, 953 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 19:32:45,782 INFO L432 NwaCegarLoop]: 180 mSDtfsCounter, 9 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 19:32:45,782 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 266 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 19:32:45,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5643 states. [2024-10-31 19:32:45,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5643 to 5643. [2024-10-31 19:32:45,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5643 states, 5642 states have (on average 1.294044665012407) internal successors, (7301), 5642 states have internal predecessors, (7301), 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 19:32:45,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5643 states to 5643 states and 7301 transitions. [2024-10-31 19:32:45,912 INFO L78 Accepts]: Start accepts. Automaton has 5643 states and 7301 transitions. Word has length 478 [2024-10-31 19:32:45,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 19:32:45,913 INFO L471 AbstractCegarLoop]: Abstraction has 5643 states and 7301 transitions. [2024-10-31 19:32:45,915 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 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 19:32:45,915 INFO L276 IsEmpty]: Start isEmpty. Operand 5643 states and 7301 transitions. [2024-10-31 19:32:45,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 481 [2024-10-31 19:32:45,922 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 19:32:45,923 INFO L215 NwaCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 15, 14, 12, 12, 10, 10, 8, 8, 8, 8, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2024-10-31 19:32:45,926 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 19:32:46,123 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 19:32:46,123 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 19:32:46,124 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 19:32:46,124 INFO L85 PathProgramCache]: Analyzing trace with hash 604379059, now seen corresponding path program 1 times [2024-10-31 19:32:46,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 19:32:46,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1111525] [2024-10-31 19:32:46,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 19:32:46,125 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-10-31 19:32:46,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-10-31 19:32:46,127 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 19:32:46,128 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 19:32:46,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 19:32:46,309 INFO L255 TraceCheckSpWp]: Trace formula consists of 532 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-31 19:32:46,313 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 19:32:46,358 INFO L134 CoverageAnalysis]: Checked inductivity of 2693 backedges. 1564 proven. 0 refuted. 0 times theorem prover too weak. 1129 trivial. 0 not checked. [2024-10-31 19:32:46,358 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 19:32:46,403 INFO L134 CoverageAnalysis]: Checked inductivity of 2693 backedges. 1564 proven. 0 refuted. 0 times theorem prover too weak. 1129 trivial. 0 not checked. [2024-10-31 19:32:46,403 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 19:32:46,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1111525] [2024-10-31 19:32:46,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1111525] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 19:32:46,403 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 19:32:46,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2024-10-31 19:32:46,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342741586] [2024-10-31 19:32:46,404 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 19:32:46,405 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 19:32:46,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 19:32:46,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 19:32:46,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 19:32:46,406 INFO L87 Difference]: Start difference. First operand 5643 states and 7301 transitions. Second operand has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 3 states have internal predecessors, (178), 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 19:32:46,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 19:32:46,562 INFO L93 Difference]: Finished difference Result 11979 states and 15732 transitions. [2024-10-31 19:32:46,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 19:32:46,563 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 3 states have internal predecessors, (178), 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 480 [2024-10-31 19:32:46,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 19:32:46,573 INFO L225 Difference]: With dead ends: 11979 [2024-10-31 19:32:46,573 INFO L226 Difference]: Without dead ends: 6357 [2024-10-31 19:32:46,579 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 958 GetRequests, 957 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 19:32:46,580 INFO L432 NwaCegarLoop]: 180 mSDtfsCounter, 9 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 19:32:46,580 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 266 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 19:32:46,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6357 states. [2024-10-31 19:32:46,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6357 to 6357. [2024-10-31 19:32:46,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6357 states, 6356 states have (on average 1.277533039647577) internal successors, (8120), 6356 states have internal predecessors, (8120), 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 19:32:46,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6357 states to 6357 states and 8120 transitions. [2024-10-31 19:32:46,751 INFO L78 Accepts]: Start accepts. Automaton has 6357 states and 8120 transitions. Word has length 480 [2024-10-31 19:32:46,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 19:32:46,751 INFO L471 AbstractCegarLoop]: Abstraction has 6357 states and 8120 transitions. [2024-10-31 19:32:46,751 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 3 states have internal predecessors, (178), 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 19:32:46,752 INFO L276 IsEmpty]: Start isEmpty. Operand 6357 states and 8120 transitions. [2024-10-31 19:32:46,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 515 [2024-10-31 19:32:46,759 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 19:32:46,759 INFO L215 NwaCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 18, 18, 18, 18, 16, 15, 14, 12, 12, 10, 10, 8, 8, 8, 8, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2024-10-31 19:32:46,763 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (20)] Ended with exit code 0 [2024-10-31 19:32:46,960 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 19:32:46,960 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 19:32:46,961 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 19:32:46,961 INFO L85 PathProgramCache]: Analyzing trace with hash -1587883283, now seen corresponding path program 1 times [2024-10-31 19:32:46,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 19:32:46,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [264772398] [2024-10-31 19:32:46,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 19:32:46,961 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-10-31 19:32:46,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-10-31 19:32:46,962 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 19:32:46,963 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 19:32:47,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 19:32:47,136 INFO L255 TraceCheckSpWp]: Trace formula consists of 570 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-31 19:32:47,140 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 19:32:47,976 INFO L134 CoverageAnalysis]: Checked inductivity of 3218 backedges. 1749 proven. 206 refuted. 0 times theorem prover too weak. 1263 trivial. 0 not checked. [2024-10-31 19:32:47,977 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 19:32:48,775 INFO L134 CoverageAnalysis]: Checked inductivity of 3218 backedges. 1844 proven. 111 refuted. 0 times theorem prover too weak. 1263 trivial. 0 not checked. [2024-10-31 19:32:48,775 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 19:32:48,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [264772398] [2024-10-31 19:32:48,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [264772398] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 19:32:48,775 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 19:32:48,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2024-10-31 19:32:48,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96485018] [2024-10-31 19:32:48,776 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 19:32:48,776 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-31 19:32:48,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 19:32:48,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-31 19:32:48,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-10-31 19:32:48,777 INFO L87 Difference]: Start difference. First operand 6357 states and 8120 transitions. Second operand has 7 states, 7 states have (on average 32.857142857142854) internal successors, (230), 7 states have internal predecessors, (230), 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 19:32:49,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 19:32:49,763 INFO L93 Difference]: Finished difference Result 18127 states and 23407 transitions. [2024-10-31 19:32:49,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-31 19:32:49,763 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 32.857142857142854) internal successors, (230), 7 states have internal predecessors, (230), 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 514 [2024-10-31 19:32:49,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 19:32:49,780 INFO L225 Difference]: With dead ends: 18127 [2024-10-31 19:32:49,780 INFO L226 Difference]: Without dead ends: 11781 [2024-10-31 19:32:49,785 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1028 GetRequests, 1022 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-10-31 19:32:49,786 INFO L432 NwaCegarLoop]: 263 mSDtfsCounter, 215 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 520 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 693 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-10-31 19:32:49,786 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [215 Valid, 693 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 520 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-10-31 19:32:49,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11781 states. [2024-10-31 19:32:50,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11781 to 11356. [2024-10-31 19:32:50,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11356 states, 11355 states have (on average 1.2729194187582562) internal successors, (14454), 11355 states have internal predecessors, (14454), 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 19:32:50,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11356 states to 11356 states and 14454 transitions. [2024-10-31 19:32:50,096 INFO L78 Accepts]: Start accepts. Automaton has 11356 states and 14454 transitions. Word has length 514 [2024-10-31 19:32:50,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 19:32:50,097 INFO L471 AbstractCegarLoop]: Abstraction has 11356 states and 14454 transitions. [2024-10-31 19:32:50,097 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 32.857142857142854) internal successors, (230), 7 states have internal predecessors, (230), 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 19:32:50,097 INFO L276 IsEmpty]: Start isEmpty. Operand 11356 states and 14454 transitions. [2024-10-31 19:32:50,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 543 [2024-10-31 19:32:50,117 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 19:32:50,117 INFO L215 NwaCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 18, 18, 18, 18, 18, 17, 16, 14, 14, 12, 12, 10, 10, 10, 10, 7, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2024-10-31 19:32:50,122 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 19:32:50,318 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 19:32:50,318 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 19:32:50,319 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 19:32:50,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1615273453, now seen corresponding path program 1 times [2024-10-31 19:32:50,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 19:32:50,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [380647636] [2024-10-31 19:32:50,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 19:32:50,319 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-10-31 19:32:50,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-10-31 19:32:50,320 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 19:32:50,321 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 19:32:50,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 19:32:50,525 INFO L255 TraceCheckSpWp]: Trace formula consists of 598 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-31 19:32:50,529 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 19:32:50,580 INFO L134 CoverageAnalysis]: Checked inductivity of 3490 backedges. 2011 proven. 0 refuted. 0 times theorem prover too weak. 1479 trivial. 0 not checked. [2024-10-31 19:32:50,581 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 19:32:50,626 INFO L134 CoverageAnalysis]: Checked inductivity of 3490 backedges. 2011 proven. 0 refuted. 0 times theorem prover too weak. 1479 trivial. 0 not checked. [2024-10-31 19:32:50,626 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 19:32:50,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [380647636] [2024-10-31 19:32:50,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [380647636] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 19:32:50,627 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 19:32:50,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2024-10-31 19:32:50,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894885498] [2024-10-31 19:32:50,627 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 19:32:50,628 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 19:32:50,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 19:32:50,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 19:32:50,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 19:32:50,628 INFO L87 Difference]: Start difference. First operand 11356 states and 14454 transitions. Second operand has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 states have internal predecessors, (188), 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 19:32:50,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 19:32:50,928 INFO L93 Difference]: Finished difference Result 22330 states and 28527 transitions. [2024-10-31 19:32:50,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 19:32:50,929 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 states have internal predecessors, (188), 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 542 [2024-10-31 19:32:50,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 19:32:50,942 INFO L225 Difference]: With dead ends: 22330 [2024-10-31 19:32:50,943 INFO L226 Difference]: Without dead ends: 10995 [2024-10-31 19:32:50,951 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1082 GetRequests, 1081 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 19:32:50,952 INFO L432 NwaCegarLoop]: 180 mSDtfsCounter, 9 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 19:32:50,953 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 266 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 19:32:50,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10995 states. [2024-10-31 19:32:51,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10995 to 9879. [2024-10-31 19:32:51,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9879 states, 9878 states have (on average 1.2387122899372343) internal successors, (12236), 9878 states have internal predecessors, (12236), 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 19:32:51,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9879 states to 9879 states and 12236 transitions. [2024-10-31 19:32:51,211 INFO L78 Accepts]: Start accepts. Automaton has 9879 states and 12236 transitions. Word has length 542 [2024-10-31 19:32:51,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 19:32:51,211 INFO L471 AbstractCegarLoop]: Abstraction has 9879 states and 12236 transitions. [2024-10-31 19:32:51,211 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 states have internal predecessors, (188), 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 19:32:51,212 INFO L276 IsEmpty]: Start isEmpty. Operand 9879 states and 12236 transitions. [2024-10-31 19:32:51,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 543 [2024-10-31 19:32:51,224 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 19:32:51,224 INFO L215 NwaCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 19, 19, 19, 19, 17, 16, 15, 13, 13, 11, 11, 9, 9, 9, 9, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2024-10-31 19:32:51,227 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 19:32:51,427 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 19:32:51,428 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 19:32:51,428 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 19:32:51,428 INFO L85 PathProgramCache]: Analyzing trace with hash -1850834424, now seen corresponding path program 2 times [2024-10-31 19:32:51,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 19:32:51,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1390833935] [2024-10-31 19:32:51,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 19:32:51,428 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-10-31 19:32:51,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-10-31 19:32:51,430 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 19:32:51,431 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 19:32:51,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 19:32:51,602 INFO L255 TraceCheckSpWp]: Trace formula consists of 598 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-31 19:32:51,607 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 19:32:52,605 INFO L134 CoverageAnalysis]: Checked inductivity of 3626 backedges. 2017 proven. 312 refuted. 0 times theorem prover too weak. 1297 trivial. 0 not checked. [2024-10-31 19:32:52,605 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 19:32:53,503 INFO L134 CoverageAnalysis]: Checked inductivity of 3626 backedges. 2160 proven. 169 refuted. 0 times theorem prover too weak. 1297 trivial. 0 not checked. [2024-10-31 19:32:53,503 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 19:32:53,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1390833935] [2024-10-31 19:32:53,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1390833935] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 19:32:53,504 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 19:32:53,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2024-10-31 19:32:53,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623371120] [2024-10-31 19:32:53,504 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 19:32:53,505 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-31 19:32:53,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 19:32:53,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-31 19:32:53,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-10-31 19:32:53,506 INFO L87 Difference]: Start difference. First operand 9879 states and 12236 transitions. Second operand has 7 states, 7 states have (on average 38.714285714285715) internal successors, (271), 7 states have internal predecessors, (271), 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 19:32:54,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 19:32:54,591 INFO L93 Difference]: Finished difference Result 25622 states and 31804 transitions. [2024-10-31 19:32:54,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-31 19:32:54,592 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 38.714285714285715) internal successors, (271), 7 states have internal predecessors, (271), 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 542 [2024-10-31 19:32:54,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 19:32:54,610 INFO L225 Difference]: With dead ends: 25622 [2024-10-31 19:32:54,611 INFO L226 Difference]: Without dead ends: 15764 [2024-10-31 19:32:54,623 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1086 GetRequests, 1078 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-10-31 19:32:54,624 INFO L432 NwaCegarLoop]: 280 mSDtfsCounter, 165 mSDsluCounter, 517 mSDsCounter, 0 mSdLazyCounter, 573 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 797 SdHoareTripleChecker+Invalid, 606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-10-31 19:32:54,624 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 797 Invalid, 606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 573 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-10-31 19:32:54,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15764 states. [2024-10-31 19:32:54,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15764 to 15126. [2024-10-31 19:32:54,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15126 states, 15125 states have (on average 1.2341818181818183) internal successors, (18667), 15125 states have internal predecessors, (18667), 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 19:32:54,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15126 states to 15126 states and 18667 transitions. [2024-10-31 19:32:54,966 INFO L78 Accepts]: Start accepts. Automaton has 15126 states and 18667 transitions. Word has length 542 [2024-10-31 19:32:54,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 19:32:54,966 INFO L471 AbstractCegarLoop]: Abstraction has 15126 states and 18667 transitions. [2024-10-31 19:32:54,967 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 38.714285714285715) internal successors, (271), 7 states have internal predecessors, (271), 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 19:32:54,967 INFO L276 IsEmpty]: Start isEmpty. Operand 15126 states and 18667 transitions. [2024-10-31 19:32:54,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 556 [2024-10-31 19:32:54,985 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 19:32:54,986 INFO L215 NwaCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 20, 20, 20, 20, 20, 19, 19, 17, 17, 15, 13, 13, 11, 11, 9, 9, 9, 9, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2024-10-31 19:32:54,989 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 19:32:55,186 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 19:32:55,186 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 19:32:55,187 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 19:32:55,187 INFO L85 PathProgramCache]: Analyzing trace with hash -965285211, now seen corresponding path program 1 times [2024-10-31 19:32:55,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 19:32:55,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [623216757] [2024-10-31 19:32:55,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 19:32:55,187 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-10-31 19:32:55,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-10-31 19:32:55,188 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-10-31 19:32:55,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2024-10-31 19:32:55,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 19:32:55,379 INFO L255 TraceCheckSpWp]: Trace formula consists of 614 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-31 19:32:55,384 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 19:32:55,448 INFO L134 CoverageAnalysis]: Checked inductivity of 3840 backedges. 995 proven. 12 refuted. 0 times theorem prover too weak. 2833 trivial. 0 not checked. [2024-10-31 19:32:55,448 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 19:32:55,505 INFO L134 CoverageAnalysis]: Checked inductivity of 3840 backedges. 995 proven. 12 refuted. 0 times theorem prover too weak. 2833 trivial. 0 not checked. [2024-10-31 19:32:55,505 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 19:32:55,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [623216757] [2024-10-31 19:32:55,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [623216757] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 19:32:55,505 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 19:32:55,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2024-10-31 19:32:55,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922773883] [2024-10-31 19:32:55,506 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 19:32:55,506 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 19:32:55,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 19:32:55,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 19:32:55,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 19:32:55,507 INFO L87 Difference]: Start difference. First operand 15126 states and 18667 transitions. Second operand has 4 states, 4 states have (on average 37.75) internal successors, (151), 4 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 19:32:55,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 19:32:55,842 INFO L93 Difference]: Finished difference Result 30710 states and 37808 transitions. [2024-10-31 19:32:55,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 19:32:55,842 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.75) internal successors, (151), 4 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 555 [2024-10-31 19:32:55,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 19:32:55,856 INFO L225 Difference]: With dead ends: 30710 [2024-10-31 19:32:55,856 INFO L226 Difference]: Without dead ends: 14590 [2024-10-31 19:32:55,866 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1110 GetRequests, 1107 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 19:32:55,867 INFO L432 NwaCegarLoop]: 219 mSDtfsCounter, 22 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 19:32:55,867 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 482 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 19:32:55,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14590 states. [2024-10-31 19:32:56,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14590 to 14590. [2024-10-31 19:32:56,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14590 states, 14589 states have (on average 1.2242100212488862) internal successors, (17860), 14589 states have internal predecessors, (17860), 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 19:32:56,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14590 states to 14590 states and 17860 transitions. [2024-10-31 19:32:56,213 INFO L78 Accepts]: Start accepts. Automaton has 14590 states and 17860 transitions. Word has length 555 [2024-10-31 19:32:56,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 19:32:56,213 INFO L471 AbstractCegarLoop]: Abstraction has 14590 states and 17860 transitions. [2024-10-31 19:32:56,213 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.75) internal successors, (151), 4 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 19:32:56,213 INFO L276 IsEmpty]: Start isEmpty. Operand 14590 states and 17860 transitions. [2024-10-31 19:32:56,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 586 [2024-10-31 19:32:56,226 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 19:32:56,227 INFO L215 NwaCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 20, 20, 20, 20, 18, 18, 16, 14, 14, 12, 12, 10, 10, 10, 10, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2024-10-31 19:32:56,230 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2024-10-31 19:32:56,427 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-10-31 19:32:56,427 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 19:32:56,428 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 19:32:56,428 INFO L85 PathProgramCache]: Analyzing trace with hash 744044369, now seen corresponding path program 1 times [2024-10-31 19:32:56,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 19:32:56,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1589908799] [2024-10-31 19:32:56,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 19:32:56,428 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-10-31 19:32:56,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-10-31 19:32:56,429 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-10-31 19:32:56,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2024-10-31 19:32:56,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 19:32:56,612 INFO L255 TraceCheckSpWp]: Trace formula consists of 643 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-31 19:32:56,616 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 19:32:56,683 INFO L134 CoverageAnalysis]: Checked inductivity of 4111 backedges. 1339 proven. 17 refuted. 0 times theorem prover too weak. 2755 trivial. 0 not checked. [2024-10-31 19:32:56,683 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 19:32:56,737 INFO L134 CoverageAnalysis]: Checked inductivity of 4111 backedges. 1339 proven. 17 refuted. 0 times theorem prover too weak. 2755 trivial. 0 not checked. [2024-10-31 19:32:56,738 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 19:32:56,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1589908799] [2024-10-31 19:32:56,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1589908799] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 19:32:56,738 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 19:32:56,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2024-10-31 19:32:56,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023899103] [2024-10-31 19:32:56,738 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 19:32:56,739 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-31 19:32:56,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 19:32:56,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-31 19:32:56,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-31 19:32:56,740 INFO L87 Difference]: Start difference. First operand 14590 states and 17860 transitions. Second operand has 6 states, 6 states have (on average 38.333333333333336) internal successors, (230), 6 states have internal predecessors, (230), 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 19:32:57,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 19:32:57,194 INFO L93 Difference]: Finished difference Result 19532 states and 23877 transitions. [2024-10-31 19:32:57,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-31 19:32:57,195 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 38.333333333333336) internal successors, (230), 6 states have internal predecessors, (230), 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 585 [2024-10-31 19:32:57,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 19:32:57,197 INFO L225 Difference]: With dead ends: 19532 [2024-10-31 19:32:57,197 INFO L226 Difference]: Without dead ends: 0 [2024-10-31 19:32:57,208 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1174 GetRequests, 1167 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 19:32:57,208 INFO L432 NwaCegarLoop]: 209 mSDtfsCounter, 205 mSDsluCounter, 441 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 650 SdHoareTripleChecker+Invalid, 572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-31 19:32:57,209 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 650 Invalid, 572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 526 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-31 19:32:57,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-10-31 19:32:57,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-10-31 19:32:57,209 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 19:32:57,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-10-31 19:32:57,211 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 585 [2024-10-31 19:32:57,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 19:32:57,211 INFO L471 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-10-31 19:32:57,211 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 38.333333333333336) internal successors, (230), 6 states have internal predecessors, (230), 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 19:32:57,211 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-10-31 19:32:57,211 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-10-31 19:32:57,214 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-10-31 19:32:57,218 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (25)] Ended with exit code 0 [2024-10-31 19:32:57,415 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-10-31 19:32:57,418 INFO L407 BasicCegarLoop]: Path program histogram: [2, 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 19:32:57,420 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-10-31 19:33:06,080 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2024-10-31 19:33:06,116 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.10 07:33:06 BoogieIcfgContainer [2024-10-31 19:33:06,117 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-10-31 19:33:06,117 INFO L158 Benchmark]: Toolchain (without parser) took 34480.26ms. Allocated memory was 183.5MB in the beginning and 897.6MB in the end (delta: 714.1MB). Free memory was 149.8MB in the beginning and 329.8MB in the end (delta: -180.0MB). Peak memory consumption was 603.2MB. Max. memory is 8.0GB. [2024-10-31 19:33:06,117 INFO L158 Benchmark]: CDTParser took 1.36ms. Allocated memory is still 183.5MB. Free memory is still 160.6MB. There was no memory consumed. Max. memory is 8.0GB. [2024-10-31 19:33:06,117 INFO L158 Benchmark]: CACSL2BoogieTranslator took 378.13ms. Allocated memory is still 183.5MB. Free memory was 149.8MB in the beginning and 131.5MB in the end (delta: 18.3MB). Peak memory consumption was 17.8MB. Max. memory is 8.0GB. [2024-10-31 19:33:06,118 INFO L158 Benchmark]: Boogie Procedure Inliner took 48.76ms. Allocated memory is still 183.5MB. Free memory was 131.5MB in the beginning and 128.8MB in the end (delta: 2.6MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. [2024-10-31 19:33:06,118 INFO L158 Benchmark]: Boogie Preprocessor took 69.53ms. Allocated memory is still 183.5MB. Free memory was 128.8MB in the beginning and 125.7MB in the end (delta: 3.1MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. [2024-10-31 19:33:06,118 INFO L158 Benchmark]: RCFGBuilder took 755.17ms. Allocated memory is still 183.5MB. Free memory was 125.2MB in the beginning and 85.3MB in the end (delta: 39.8MB). Peak memory consumption was 39.8MB. Max. memory is 8.0GB. [2024-10-31 19:33:06,118 INFO L158 Benchmark]: TraceAbstraction took 33220.72ms. Allocated memory was 183.5MB in the beginning and 897.6MB in the end (delta: 714.1MB). Free memory was 84.8MB in the beginning and 329.8MB in the end (delta: -245.0MB). Peak memory consumption was 538.2MB. Max. memory is 8.0GB. [2024-10-31 19:33:06,121 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.36ms. Allocated memory is still 183.5MB. Free memory is still 160.6MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 378.13ms. Allocated memory is still 183.5MB. Free memory was 149.8MB in the beginning and 131.5MB in the end (delta: 18.3MB). Peak memory consumption was 17.8MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 48.76ms. Allocated memory is still 183.5MB. Free memory was 131.5MB in the beginning and 128.8MB in the end (delta: 2.6MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 69.53ms. Allocated memory is still 183.5MB. Free memory was 128.8MB in the beginning and 125.7MB in the end (delta: 3.1MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. * RCFGBuilder took 755.17ms. Allocated memory is still 183.5MB. Free memory was 125.2MB in the beginning and 85.3MB in the end (delta: 39.8MB). Peak memory consumption was 39.8MB. Max. memory is 8.0GB. * TraceAbstraction took 33220.72ms. Allocated memory was 183.5MB in the beginning and 897.6MB in the end (delta: 714.1MB). Free memory was 84.8MB in the beginning and 329.8MB in the end (delta: -245.0MB). Peak memory consumption was 538.2MB. 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: 680]: 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: 24.5s, OverallIterations: 24, TraceHistogramMax: 21, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.2s, AutomataDifference: 6.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2230 SdHoareTripleChecker+Valid, 4.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2230 mSDsluCounter, 10456 SdHoareTripleChecker+Invalid, 3.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 5208 mSDsCounter, 472 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 4571 IncrementalHoareTripleChecker+Invalid, 5043 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 472 mSolverCounterUnsat, 5248 mSDtfsCounter, 4571 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 14356 GetRequests, 14298 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=15126occurred in iteration=22, InterpolantAutomatonStates: 98, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 2.4s AutomataMinimizationTime, 24 MinimizatonAttempts, 7620 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.5s SsaConstructionTime, 1.5s SatisfiabilityAnalysisTime, 6.5s InterpolantComputationTime, 7190 NumberOfCodeBlocks, 7190 NumberOfCodeBlocksAsserted, 24 NumberOfCheckSat, 14332 ConstructedInterpolants, 42 QuantifiedInterpolants, 25760 SizeOfPredicates, 10 NumberOfNonLiveVariables, 8179 ConjunctsInSsa, 59 ConjunctsInUnsatCore, 48 InterpolantComputations, 36 PerfectInterpolantSequences, 65912/66852 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: 111]: Loop Invariant Derived loop invariant: (((((((((((((((((((((((((((((((((((((((((((((((((((((((((blastFlag == 2) && (8496 == (((2 * ag_X) + (2 * ag_Y)) % 4294967296))) && (s__s3__tmp__next_state___0 != 8497)) && (8640 == s__state)) && (0 == s__hit)) || ((8544 == s__state) && (blastFlag == 1))) || (((s__s3__tmp__next_state___0 == 8640) && (blastFlag != 4)) && (3 == s__state))) || (((((blastFlag == 2) && (8496 == (((2 * ag_X) + (2 * ag_Y)) % 4294967296))) && (s__s3__tmp__next_state___0 == 8576)) && (0 == s__hit)) && (8592 == s__state))) || (((((blastFlag == 2) && (s__s3__tmp__next_state___0 == 8576)) && (8448 == (((2 * ag_X) + (2 * ag_Y)) % 4294967296))) && (0 == s__hit)) && (8576 == s__state))) || ((((((blastFlag == 2) && (s__s3__tmp__next_state___0 != 8497)) && (s__s3__tmp__next_state___0 != 8496)) && (8496 == s__state)) && ((((2 * ag_X) + (2 * ag_Y)) % 4294967296) == s__state)) && (0 == s__hit))) || (((8448 == s__state) && (s__s3__tmp__next_state___0 == 8576)) && (blastFlag == 1))) || (((8448 == s__state) && (s__s3__tmp__next_state___0 == 8482)) && (0 == s__hit))) || (((((blastFlag == 2) && (s__s3__tmp__next_state___0 == 8576)) && (8466 == s__state)) && (8448 == (((2 * ag_X) + (2 * ag_Y)) % 4294967296))) && (0 == s__hit))) || (((((s__s3__tmp__next_state___0 != 8497) && (blastFlag != 4)) && (8672 == s__state)) && (8448 == (((2 * ag_X) + (2 * ag_Y)) % 4294967296))) && (0 == s__hit))) || ((((blastFlag == 2) && (8528 == s__state)) && (8448 == (((2 * ag_X) + (2 * ag_Y)) % 4294967296))) && (0 == s__hit))) || ((blastFlag == 1) && (8528 == s__state))) || (((((8496 == (((2 * ag_X) + (2 * ag_Y)) % 4294967296)) && (s__s3__tmp__next_state___0 != 8497)) && (blastFlag != 4)) && (8672 == s__state)) && (0 == s__hit))) || (((((8448 == s__state) && (8496 == (((2 * ag_X) + (2 * ag_Y)) % 4294967296))) && (blastFlag != 4)) && (s__s3__tmp__next_state___0 == 3)) && (0 == s__hit))) || ((((blastFlag == 2) && (8560 == s__state)) && (8448 == (((2 * ag_X) + (2 * ag_Y)) % 4294967296))) && (0 == s__hit))) || ((((blastFlag == 2) && (8512 == s__state)) && (8496 == (((2 * ag_X) + (2 * ag_Y)) % 4294967296))) && (0 == s__hit))) || ((((blastFlag == 2) && (8496 == (((2 * ag_X) + (2 * ag_Y)) % 4294967296))) && (8528 == s__state)) && (0 == s__hit))) || (((((blastFlag == 2) && (8496 == (((2 * ag_X) + (2 * ag_Y)) % 4294967296))) && (s__s3__tmp__next_state___0 != 8497)) && (8656 == s__state)) && (0 == s__hit))) || ((((blastFlag == 2) && (8496 == (((2 * ag_X) + (2 * ag_Y)) % 4294967296))) && (8544 == s__state)) && (0 == s__hit))) || (((s__s3__tmp__next_state___0 == 8576) && (blastFlag == 1)) && (8576 == s__state))) || ((((((blastFlag == 2) && (s__s3__tmp__next_state___0 != 8497)) && (s__s3__tmp__next_state___0 != 8496)) && (8608 == s__state)) && (8448 == (((2 * ag_X) + (2 * ag_Y)) % 4294967296))) && (0 == s__hit))) || ((blastFlag == 1) && (3 == s__state))) || ((((((blastFlag == 2) && (s__s3__tmp__next_state___0 != 8497)) && (s__s3__tmp__next_state___0 != 8496)) && (8448 == (((2 * ag_X) + (2 * ag_Y)) % 4294967296))) && (0 == s__hit)) && (8592 == s__state))) || ((blastFlag == 1) && (8448 == (((2 * ag_X) + (2 * ag_Y)) % 4294967296)))) || (((blastFlag == 2) && (8656 == s__state)) && (0 != s__hit))) || ((8608 == s__state) && (blastFlag == 1))) || ((8466 == s__state) && (blastFlag == 1))) || (((s__s3__tmp__next_state___0 == 8482) && (blastFlag == 1)) && (8482 == s__state))) || (((s__s3__tmp__next_state___0 == 8482) && (0 == s__hit)) && (8482 == s__state))) || ((blastFlag == 1) && (8640 == s__state))) || ((blastFlag == 0) && (8464 == s__state))) || ((8560 == s__state) && (blastFlag == 1))) || ((blastFlag == 1) && (8592 == s__state))) || (((s__s3__tmp__next_state___0 != 8496) && (3 == s__state)) && (0 == s__hit))) || ((((8448 == s__state) && (s__s3__tmp__next_state___0 == 8640)) && (blastFlag != 4)) && (0 != s__hit))) || (((8448 == s__state) && (s__s3__tmp__next_state___0 == 8482)) && (blastFlag == 1))) || ((((blastFlag == 2) && (8544 == s__state)) && (8448 == (((2 * ag_X) + (2 * ag_Y)) % 4294967296))) && (0 == s__hit))) || ((((blastFlag == 2) && (8496 == (((2 * ag_X) + (2 * ag_Y)) % 4294967296))) && (8560 == s__state)) && (0 == s__hit))) || (((blastFlag != 4) && (8672 == s__state)) && (0 != s__hit))) || (((((blastFlag == 2) && (8496 == (((2 * ag_X) + (2 * ag_Y)) % 4294967296))) && (s__s3__tmp__next_state___0 == 8576)) && (0 == s__hit)) && (8576 == s__state))) || ((8672 == s__state) && (blastFlag == 1))) || ((blastFlag == 1) && ((((2 * ag_X) + (2 * ag_Y)) % 4294967296) == s__state))) || (((((8448 == s__state) && (blastFlag == 2)) && (s__s3__tmp__next_state___0 == 8576)) && (8448 == (((2 * ag_X) + (2 * ag_Y)) % 4294967296))) && (0 == s__hit))) || ((((((blastFlag == 2) && (8496 == (((2 * ag_X) + (2 * ag_Y)) % 4294967296))) && (s__s3__tmp__next_state___0 != 8497)) && (s__s3__tmp__next_state___0 != 8496)) && (8466 == s__state)) && (0 == s__hit))) || (((8448 == s__state) && (s__s3__tmp__next_state___0 == 3)) && (blastFlag == 1))) || (((((blastFlag == 2) && (s__s3__tmp__next_state___0 != 8497)) && (8448 == (((2 * ag_X) + (2 * ag_Y)) % 4294967296))) && (8640 == s__state)) && (0 == s__hit))) || (((((blastFlag == 2) && (s__s3__tmp__next_state___0 != 8497)) && (8656 == s__state)) && (8448 == (((2 * ag_X) + (2 * ag_Y)) % 4294967296))) && (0 == s__hit))) || (((8656 == s__state) && (blastFlag == 1)) && (0 == s__hit))) || (((((blastFlag == 2) && (8496 == (((2 * ag_X) + (2 * ag_Y)) % 4294967296))) && (s__s3__tmp__next_state___0 == 8576)) && (8608 == s__state)) && (0 == s__hit))) || (((((8448 == s__state) && (blastFlag != 4)) && (s__s3__tmp__next_state___0 == 3)) && (8448 == (((2 * ag_X) + (2 * ag_Y)) % 4294967296))) && (0 == s__hit))) || (((((8448 == s__state) && (blastFlag == 2)) && (8496 == (((2 * ag_X) + (2 * ag_Y)) % 4294967296))) && (s__s3__tmp__next_state___0 == 8576)) && (0 == s__hit))) || ((((s__s3__tmp__next_state___0 == 8640) && (blastFlag != 4)) && (8640 == s__state)) && (0 != s__hit))) || ((((blastFlag == 2) && (8512 == s__state)) && (8448 == (((2 * ag_X) + (2 * ag_Y)) % 4294967296))) && (0 == s__hit))) RESULT: Ultimate proved your program to be correct! [2024-10-31 19:33:06,143 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request...