/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --cacsl2boogietranslator.allow.undefined.functions true --traceabstraction.smt.solver External_ModelsAndUnsatCoreMode --traceabstraction.command.for.external.solver 'cvc4 --incremental --print-success --lang smt' -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Bitvector.epf -i ../../../trunk/examples/svcomp/bitvector/s3_srvr_3a_alt.BV.c.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.5-dev-356b6ba-m [2024-10-31 19:32:49,740 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-31 19:32:49,802 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 19:32:49,805 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-31 19:32:49,805 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-31 19:32:49,823 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-31 19:32:49,823 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-31 19:32:49,824 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-31 19:32:49,824 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-31 19:32:49,824 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-31 19:32:49,825 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-31 19:32:49,825 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-31 19:32:49,827 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-31 19:32:49,829 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-31 19:32:49,829 INFO L153 SettingsManager]: * Use SBE=true [2024-10-31 19:32:49,829 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-31 19:32:49,830 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-31 19:32:49,830 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-31 19:32:49,830 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-31 19:32:49,830 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-31 19:32:49,830 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-31 19:32:49,831 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-31 19:32:49,831 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-31 19:32:49,831 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-31 19:32:49,831 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-10-31 19:32:49,831 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-31 19:32:49,831 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-10-31 19:32:49,831 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-31 19:32:49,832 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-31 19:32:49,832 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-31 19:32:49,832 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-31 19:32:49,832 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-31 19:32:49,832 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-31 19:32:49,832 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-31 19:32:49,833 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 19:32:49,833 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-31 19:32:49,833 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-31 19:32:49,833 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-31 19:32:49,833 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2024-10-31 19:32:49,833 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-10-31 19:32:49,834 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-31 19:32:49,835 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-31 19:32:49,836 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-31 19:32:49,836 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-31 19:32:49,836 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2024-10-31 19:32:49,836 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Allow undefined functions -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Command for external solver -> cvc4 --incremental --print-success --lang smt [2024-10-31 19:32:50,087 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-31 19:32:50,126 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-31 19:32:50,132 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-31 19:32:50,133 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-31 19:32:50,134 INFO L274 PluginConnector]: CDTParser initialized [2024-10-31 19:32:50,134 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/s3_srvr_3a_alt.BV.c.cil.c [2024-10-31 19:32:51,388 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-31 19:32:51,622 INFO L384 CDTParser]: Found 1 translation units. [2024-10-31 19:32:51,622 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/bitvector/s3_srvr_3a_alt.BV.c.cil.c [2024-10-31 19:32:51,635 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/09c200b7f/18f461985d0e43a09be4b37d8afdcf28/FLAG659538e7a [2024-10-31 19:32:51,653 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/09c200b7f/18f461985d0e43a09be4b37d8afdcf28 [2024-10-31 19:32:51,655 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-31 19:32:51,657 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-10-31 19:32:51,658 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-31 19:32:51,659 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-31 19:32:51,663 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-31 19:32:51,663 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 07:32:51" (1/1) ... [2024-10-31 19:32:51,669 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58790c21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 07:32:51, skipping insertion in model container [2024-10-31 19:32:51,669 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 07:32:51" (1/1) ... [2024-10-31 19:32:51,716 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-31 19:32:51,965 WARN L251 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/bitvector/s3_srvr_3a_alt.BV.c.cil.c[44628,44641] [2024-10-31 19:32:51,981 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 19:32:51,997 INFO L200 MainTranslator]: Completed pre-run [2024-10-31 19:32:52,047 WARN L251 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/bitvector/s3_srvr_3a_alt.BV.c.cil.c[44628,44641] [2024-10-31 19:32:52,049 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 19:32:52,060 INFO L204 MainTranslator]: Completed translation [2024-10-31 19:32:52,061 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 07:32:52 WrapperNode [2024-10-31 19:32:52,061 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-31 19:32:52,061 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-31 19:32:52,061 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-31 19:32:52,062 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-31 19:32:52,066 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 07:32:52" (1/1) ... [2024-10-31 19:32:52,079 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 07:32:52" (1/1) ... [2024-10-31 19:32:52,100 INFO L138 Inliner]: procedures = 15, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 514 [2024-10-31 19:32:52,100 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-31 19:32:52,101 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-31 19:32:52,101 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-31 19:32:52,101 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-31 19:32:52,107 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 07:32:52" (1/1) ... [2024-10-31 19:32:52,107 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 07:32:52" (1/1) ... [2024-10-31 19:32:52,110 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 07:32:52" (1/1) ... [2024-10-31 19:32:52,123 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 19:32:52,123 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 07:32:52" (1/1) ... [2024-10-31 19:32:52,123 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 07:32:52" (1/1) ... [2024-10-31 19:32:52,129 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 07:32:52" (1/1) ... [2024-10-31 19:32:52,132 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 07:32:52" (1/1) ... [2024-10-31 19:32:52,134 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 07:32:52" (1/1) ... [2024-10-31 19:32:52,135 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 07:32:52" (1/1) ... [2024-10-31 19:32:52,137 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-31 19:32:52,137 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-31 19:32:52,138 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-31 19:32:52,138 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-31 19:32:52,140 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 07:32:52" (1/1) ... [2024-10-31 19:32:52,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 19:32:52,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-31 19:32:52,168 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 19:32:52,172 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 19:32:52,202 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-31 19:32:52,202 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-10-31 19:32:52,202 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-31 19:32:52,202 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-31 19:32:52,280 INFO L238 CfgBuilder]: Building ICFG [2024-10-31 19:32:52,282 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-31 19:32:52,292 WARN L781 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2024-10-31 19:32:52,668 INFO L735 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2024-10-31 19:32:52,669 INFO L735 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2024-10-31 19:32:52,708 INFO L? ?]: Removed 117 outVars from TransFormulas that were not future-live. [2024-10-31 19:32:52,708 INFO L287 CfgBuilder]: Performing block encoding [2024-10-31 19:32:52,720 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-31 19:32:52,720 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-10-31 19:32:52,721 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 07:32:52 BoogieIcfgContainer [2024-10-31 19:32:52,721 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-31 19:32:52,724 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-31 19:32:52,724 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-31 19:32:52,726 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-31 19:32:52,726 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.10 07:32:51" (1/3) ... [2024-10-31 19:32:52,726 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fca7b6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 07:32:52, skipping insertion in model container [2024-10-31 19:32:52,727 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 07:32:52" (2/3) ... [2024-10-31 19:32:52,727 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fca7b6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 07:32:52, skipping insertion in model container [2024-10-31 19:32:52,727 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 07:32:52" (3/3) ... [2024-10-31 19:32:52,728 INFO L112 eAbstractionObserver]: Analyzing ICFG s3_srvr_3a_alt.BV.c.cil.c [2024-10-31 19:32:52,738 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-31 19:32:52,739 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-31 19:32:52,785 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-31 19:32:52,789 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;@356e46a7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-31 19:32:52,789 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-31 19:32:52,792 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 19:32:52,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-10-31 19:32:52,797 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 19:32:52,798 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 19:32:52,798 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 19:32:52,801 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 19:32:52,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1632003015, now seen corresponding path program 1 times [2024-10-31 19:32:52,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 19:32:52,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1339237216] [2024-10-31 19:32:52,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 19:32:52,807 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-10-31 19:32:52,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-10-31 19:32:52,831 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 19:32:52,834 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 19:32:52,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 19:32:52,936 INFO L255 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-31 19:32:52,940 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 19:32:53,006 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 19:32:53,006 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 19:32:53,048 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 19:32:53,050 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 19:32:53,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1339237216] [2024-10-31 19:32:53,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1339237216] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 19:32:53,051 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 19:32:53,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2024-10-31 19:32:53,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174993892] [2024-10-31 19:32:53,053 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 19:32:53,056 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 19:32:53,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 19:32:53,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 19:32:53,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 19:32:53,075 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 19:32:53,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 19:32:53,236 INFO L93 Difference]: Finished difference Result 275 states and 473 transitions. [2024-10-31 19:32:53,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 19:32:53,238 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 19:32:53,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 19:32:53,244 INFO L225 Difference]: With dead ends: 275 [2024-10-31 19:32:53,244 INFO L226 Difference]: Without dead ends: 125 [2024-10-31 19:32:53,246 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 19:32:53,248 INFO L432 NwaCegarLoop]: 211 mSDtfsCounter, 8 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 19:32:53,249 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 324 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 19:32:53,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2024-10-31 19:32:53,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2024-10-31 19:32:53,274 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 19:32:53,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 185 transitions. [2024-10-31 19:32:53,277 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 185 transitions. Word has length 44 [2024-10-31 19:32:53,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 19:32:53,278 INFO L471 AbstractCegarLoop]: Abstraction has 125 states and 185 transitions. [2024-10-31 19:32:53,278 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 19:32:53,278 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 185 transitions. [2024-10-31 19:32:53,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-10-31 19:32:53,280 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 19:32:53,280 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 19:32:53,287 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 19:32:53,480 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 19:32:53,481 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 19:32:53,481 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 19:32:53,482 INFO L85 PathProgramCache]: Analyzing trace with hash -1722912794, now seen corresponding path program 1 times [2024-10-31 19:32:53,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 19:32:53,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [439680903] [2024-10-31 19:32:53,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 19:32:53,482 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-10-31 19:32:53,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-10-31 19:32:53,484 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 19:32:53,485 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 19:32:53,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 19:32:53,599 INFO L255 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-31 19:32:53,601 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 19:32:53,677 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 19:32:53,677 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 19:32:53,711 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 19:32:53,712 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 19:32:53,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [439680903] [2024-10-31 19:32:53,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [439680903] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 19:32:53,712 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 19:32:53,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2024-10-31 19:32:53,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765685346] [2024-10-31 19:32:53,713 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 19:32:53,714 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 19:32:53,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 19:32:53,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 19:32:53,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 19:32:53,716 INFO L87 Difference]: Start difference. First operand 125 states and 185 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:32:53,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 19:32:53,859 INFO L93 Difference]: Finished difference Result 252 states and 380 transitions. [2024-10-31 19:32:53,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 19:32:53,859 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2024-10-31 19:32:53,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 19:32:53,862 INFO L225 Difference]: With dead ends: 252 [2024-10-31 19:32:53,862 INFO L226 Difference]: Without dead ends: 146 [2024-10-31 19:32:53,862 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 19:32:53,863 INFO L432 NwaCegarLoop]: 169 mSDtfsCounter, 9 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 19:32:53,864 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 255 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 19:32:53,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2024-10-31 19:32:53,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2024-10-31 19:32:53,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 1.4551724137931035) internal successors, (211), 145 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:32:53,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 211 transitions. [2024-10-31 19:32:53,875 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 211 transitions. Word has length 60 [2024-10-31 19:32:53,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 19:32:53,876 INFO L471 AbstractCegarLoop]: Abstraction has 146 states and 211 transitions. [2024-10-31 19:32:53,876 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:32:53,876 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 211 transitions. [2024-10-31 19:32:53,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2024-10-31 19:32:53,879 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 19:32:53,879 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 19:32:53,882 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 19:32:54,081 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 19:32:54,082 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 19:32:54,083 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 19:32:54,083 INFO L85 PathProgramCache]: Analyzing trace with hash -1797387181, now seen corresponding path program 1 times [2024-10-31 19:32:54,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 19:32:54,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1542821001] [2024-10-31 19:32:54,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 19:32:54,083 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-10-31 19:32:54,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-10-31 19:32:54,085 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 19:32:54,086 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 19:32:54,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 19:32:54,185 INFO L255 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-31 19:32:54,187 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 19:32:54,227 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-10-31 19:32:54,227 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 19:32:54,256 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-10-31 19:32:54,256 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 19:32:54,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1542821001] [2024-10-31 19:32:54,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1542821001] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 19:32:54,256 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 19:32:54,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2024-10-31 19:32:54,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553800305] [2024-10-31 19:32:54,256 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 19:32:54,257 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 19:32:54,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 19:32:54,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 19:32:54,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 19:32:54,258 INFO L87 Difference]: Start difference. First operand 146 states and 211 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:32:54,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 19:32:54,429 INFO L93 Difference]: Finished difference Result 297 states and 437 transitions. [2024-10-31 19:32:54,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 19:32:54,429 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2024-10-31 19:32:54,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 19:32:54,430 INFO L225 Difference]: With dead ends: 297 [2024-10-31 19:32:54,431 INFO L226 Difference]: Without dead ends: 170 [2024-10-31 19:32:54,431 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 19:32:54,432 INFO L432 NwaCegarLoop]: 182 mSDtfsCounter, 9 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-31 19:32:54,434 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 268 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-31 19:32:54,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2024-10-31 19:32:54,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2024-10-31 19:32:54,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 1.4201183431952662) internal successors, (240), 169 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:32:54,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 240 transitions. [2024-10-31 19:32:54,448 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 240 transitions. Word has length 81 [2024-10-31 19:32:54,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 19:32:54,448 INFO L471 AbstractCegarLoop]: Abstraction has 170 states and 240 transitions. [2024-10-31 19:32:54,448 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:32:54,448 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 240 transitions. [2024-10-31 19:32:54,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2024-10-31 19:32:54,449 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 19:32:54,450 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 19:32:54,452 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 19:32:54,650 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 19:32:54,650 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 19:32:54,651 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 19:32:54,651 INFO L85 PathProgramCache]: Analyzing trace with hash -2045533675, now seen corresponding path program 1 times [2024-10-31 19:32:54,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 19:32:54,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [594107978] [2024-10-31 19:32:54,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 19:32:54,651 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-10-31 19:32:54,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-10-31 19:32:54,656 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 19:32:54,656 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 19:32:54,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 19:32:54,751 INFO L255 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-31 19:32:54,752 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 19:32:54,809 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-10-31 19:32:54,810 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 19:32:54,862 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-10-31 19:32:54,862 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 19:32:54,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [594107978] [2024-10-31 19:32:54,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [594107978] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 19:32:54,862 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 19:32:54,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2024-10-31 19:32:54,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955761887] [2024-10-31 19:32:54,863 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 19:32:54,863 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 19:32:54,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 19:32:54,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 19:32:54,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 19:32:54,864 INFO L87 Difference]: Start difference. First operand 170 states and 240 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:32:55,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 19:32:55,008 INFO L93 Difference]: Finished difference Result 362 states and 529 transitions. [2024-10-31 19:32:55,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 19:32:55,009 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2024-10-31 19:32:55,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 19:32:55,010 INFO L225 Difference]: With dead ends: 362 [2024-10-31 19:32:55,010 INFO L226 Difference]: Without dead ends: 211 [2024-10-31 19:32:55,011 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 19:32:55,012 INFO L432 NwaCegarLoop]: 169 mSDtfsCounter, 10 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 19:32:55,012 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 255 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 19:32:55,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2024-10-31 19:32:55,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2024-10-31 19:32:55,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 1.361904761904762) internal successors, (286), 210 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:32:55,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 286 transitions. [2024-10-31 19:32:55,030 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 286 transitions. Word has length 81 [2024-10-31 19:32:55,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 19:32:55,030 INFO L471 AbstractCegarLoop]: Abstraction has 211 states and 286 transitions. [2024-10-31 19:32:55,030 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:32:55,030 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 286 transitions. [2024-10-31 19:32:55,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2024-10-31 19:32:55,031 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 19:32:55,032 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 19:32:55,035 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 19:32:55,234 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 19:32:55,235 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 19:32:55,235 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 19:32:55,235 INFO L85 PathProgramCache]: Analyzing trace with hash 755662145, now seen corresponding path program 1 times [2024-10-31 19:32:55,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 19:32:55,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1616274612] [2024-10-31 19:32:55,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 19:32:55,236 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-10-31 19:32:55,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-10-31 19:32:55,237 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 19:32:55,242 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 19:32:55,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 19:32:55,323 INFO L255 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-31 19:32:55,325 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 19:32:55,364 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2024-10-31 19:32:55,364 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 19:32:55,397 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2024-10-31 19:32:55,397 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 19:32:55,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1616274612] [2024-10-31 19:32:55,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1616274612] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 19:32:55,398 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 19:32:55,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2024-10-31 19:32:55,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849681627] [2024-10-31 19:32:55,398 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 19:32:55,398 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 19:32:55,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 19:32:55,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 19:32:55,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 19:32:55,399 INFO L87 Difference]: Start difference. First operand 211 states and 286 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:32:55,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 19:32:55,517 INFO L93 Difference]: Finished difference Result 428 states and 590 transitions. [2024-10-31 19:32:55,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 19:32:55,517 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2024-10-31 19:32:55,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 19:32:55,519 INFO L225 Difference]: With dead ends: 428 [2024-10-31 19:32:55,519 INFO L226 Difference]: Without dead ends: 236 [2024-10-31 19:32:55,519 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 19:32:55,520 INFO L432 NwaCegarLoop]: 184 mSDtfsCounter, 9 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 19:32:55,520 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 270 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 19:32:55,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2024-10-31 19:32:55,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 236. [2024-10-31 19:32:55,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 1.3446808510638297) internal successors, (316), 235 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:32:55,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 316 transitions. [2024-10-31 19:32:55,534 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 316 transitions. Word has length 101 [2024-10-31 19:32:55,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 19:32:55,534 INFO L471 AbstractCegarLoop]: Abstraction has 236 states and 316 transitions. [2024-10-31 19:32:55,537 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:32:55,537 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 316 transitions. [2024-10-31 19:32:55,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2024-10-31 19:32:55,538 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 19:32:55,538 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 19:32:55,542 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 19:32:55,738 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 19:32:55,739 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 19:32:55,739 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 19:32:55,739 INFO L85 PathProgramCache]: Analyzing trace with hash -687746511, now seen corresponding path program 1 times [2024-10-31 19:32:55,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 19:32:55,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [173768067] [2024-10-31 19:32:55,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 19:32:55,740 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-10-31 19:32:55,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-10-31 19:32:55,741 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 19:32:55,743 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 19:32:55,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 19:32:55,820 INFO L255 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-31 19:32:55,822 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 19:32:55,884 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-10-31 19:32:55,884 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 19:32:55,952 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-10-31 19:32:55,953 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 19:32:55,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [173768067] [2024-10-31 19:32:55,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [173768067] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 19:32:55,953 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 19:32:55,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2024-10-31 19:32:55,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528904541] [2024-10-31 19:32:55,953 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 19:32:55,954 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 19:32:55,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 19:32:55,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 19:32:55,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 19:32:55,955 INFO L87 Difference]: Start difference. First operand 236 states and 316 transitions. Second operand has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:32:55,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 19:32:56,000 INFO L93 Difference]: Finished difference Result 666 states and 899 transitions. [2024-10-31 19:32:56,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 19:32:56,000 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2024-10-31 19:32:56,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 19:32:56,002 INFO L225 Difference]: With dead ends: 666 [2024-10-31 19:32:56,002 INFO L226 Difference]: Without dead ends: 449 [2024-10-31 19:32:56,002 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 239 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 19:32:56,003 INFO L432 NwaCegarLoop]: 270 mSDtfsCounter, 113 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 433 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 19:32:56,003 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 433 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 19:32:56,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2024-10-31 19:32:56,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 449. [2024-10-31 19:32:56,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 448 states have (on average 1.3415178571428572) internal successors, (601), 448 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:32:56,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 601 transitions. [2024-10-31 19:32:56,024 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 601 transitions. Word has length 121 [2024-10-31 19:32:56,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 19:32:56,024 INFO L471 AbstractCegarLoop]: Abstraction has 449 states and 601 transitions. [2024-10-31 19:32:56,024 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:32:56,024 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 601 transitions. [2024-10-31 19:32:56,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2024-10-31 19:32:56,026 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 19:32:56,026 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 19:32:56,031 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (7)] Ended with exit code 0 [2024-10-31 19:32:56,229 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 19:32:56,230 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 19:32:56,230 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 19:32:56,230 INFO L85 PathProgramCache]: Analyzing trace with hash 209646767, now seen corresponding path program 1 times [2024-10-31 19:32:56,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 19:32:56,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1305631422] [2024-10-31 19:32:56,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 19:32:56,231 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-10-31 19:32:56,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-10-31 19:32:56,232 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 19:32:56,233 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 19:32:56,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 19:32:56,305 INFO L255 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-31 19:32:56,307 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 19:32:56,360 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2024-10-31 19:32:56,360 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 19:32:56,417 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2024-10-31 19:32:56,417 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 19:32:56,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1305631422] [2024-10-31 19:32:56,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1305631422] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 19:32:56,417 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 19:32:56,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2024-10-31 19:32:56,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557149326] [2024-10-31 19:32:56,418 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 19:32:56,418 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 19:32:56,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 19:32:56,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 19:32:56,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-31 19:32:56,419 INFO L87 Difference]: Start difference. First operand 449 states and 601 transitions. Second operand has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:32:56,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 19:32:56,471 INFO L93 Difference]: Finished difference Result 1302 states and 1754 transitions. [2024-10-31 19:32:56,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 19:32:56,472 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2024-10-31 19:32:56,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 19:32:56,474 INFO L225 Difference]: With dead ends: 1302 [2024-10-31 19:32:56,474 INFO L226 Difference]: Without dead ends: 872 [2024-10-31 19:32:56,475 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-31 19:32:56,475 INFO L432 NwaCegarLoop]: 251 mSDtfsCounter, 297 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 561 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 19:32:56,476 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [297 Valid, 561 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 19:32:56,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 872 states. [2024-10-31 19:32:56,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 872 to 872. [2024-10-31 19:32:56,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 872 states, 871 states have (on average 1.3432835820895523) internal successors, (1170), 871 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:32:56,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 1170 transitions. [2024-10-31 19:32:56,489 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 1170 transitions. Word has length 121 [2024-10-31 19:32:56,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 19:32:56,489 INFO L471 AbstractCegarLoop]: Abstraction has 872 states and 1170 transitions. [2024-10-31 19:32:56,490 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:32:56,490 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 1170 transitions. [2024-10-31 19:32:56,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2024-10-31 19:32:56,491 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 19:32:56,491 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 19:32:56,494 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 19:32:56,694 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 19:32:56,694 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 19:32:56,695 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 19:32:56,695 INFO L85 PathProgramCache]: Analyzing trace with hash -247255522, now seen corresponding path program 1 times [2024-10-31 19:32:56,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 19:32:56,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [635954371] [2024-10-31 19:32:56,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 19:32:56,695 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-10-31 19:32:56,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-10-31 19:32:56,699 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 19:32:56,700 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 19:32:56,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 19:32:56,800 INFO L255 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-31 19:32:56,801 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 19:32:56,894 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 155 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2024-10-31 19:32:56,895 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 19:32:56,942 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 155 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2024-10-31 19:32:56,942 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 19:32:56,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [635954371] [2024-10-31 19:32:56,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [635954371] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 19:32:56,942 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 19:32:56,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2024-10-31 19:32:56,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874195305] [2024-10-31 19:32:56,943 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 19:32:56,943 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 19:32:56,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 19:32:56,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 19:32:56,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-31 19:32:56,944 INFO L87 Difference]: Start difference. First operand 872 states and 1170 transitions. Second operand has 4 states, 4 states have (on average 42.25) internal successors, (169), 4 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:32:57,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 19:32:57,147 INFO L93 Difference]: Finished difference Result 2017 states and 2829 transitions. [2024-10-31 19:32:57,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 19:32:57,148 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 42.25) internal successors, (169), 4 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 159 [2024-10-31 19:32:57,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 19:32:57,151 INFO L225 Difference]: With dead ends: 2017 [2024-10-31 19:32:57,151 INFO L226 Difference]: Without dead ends: 1164 [2024-10-31 19:32:57,152 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 314 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-31 19:32:57,152 INFO L432 NwaCegarLoop]: 120 mSDtfsCounter, 48 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-31 19:32:57,152 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 219 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-31 19:32:57,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1164 states. [2024-10-31 19:32:57,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1164 to 1150. [2024-10-31 19:32:57,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1150 states, 1149 states have (on average 1.370757180156658) internal successors, (1575), 1149 states have internal predecessors, (1575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:32:57,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1150 states to 1150 states and 1575 transitions. [2024-10-31 19:32:57,168 INFO L78 Accepts]: Start accepts. Automaton has 1150 states and 1575 transitions. Word has length 159 [2024-10-31 19:32:57,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 19:32:57,168 INFO L471 AbstractCegarLoop]: Abstraction has 1150 states and 1575 transitions. [2024-10-31 19:32:57,168 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 42.25) internal successors, (169), 4 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:32:57,168 INFO L276 IsEmpty]: Start isEmpty. Operand 1150 states and 1575 transitions. [2024-10-31 19:32:57,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2024-10-31 19:32:57,170 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 19:32:57,170 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 19:32:57,176 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 19:32:57,370 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 19:32:57,370 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 19:32:57,371 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 19:32:57,371 INFO L85 PathProgramCache]: Analyzing trace with hash 1523776844, now seen corresponding path program 1 times [2024-10-31 19:32:57,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 19:32:57,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [993668696] [2024-10-31 19:32:57,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 19:32:57,371 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-10-31 19:32:57,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-10-31 19:32:57,373 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 19:32:57,374 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 19:32:57,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 19:32:57,457 INFO L255 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-31 19:32:57,459 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 19:32:57,480 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2024-10-31 19:32:57,480 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 19:32:57,502 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2024-10-31 19:32:57,502 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 19:32:57,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [993668696] [2024-10-31 19:32:57,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [993668696] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 19:32:57,502 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 19:32:57,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2024-10-31 19:32:57,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349279522] [2024-10-31 19:32:57,503 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 19:32:57,503 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 19:32:57,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 19:32:57,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 19:32:57,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 19:32:57,504 INFO L87 Difference]: Start difference. First operand 1150 states and 1575 transitions. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:32:57,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 19:32:57,538 INFO L93 Difference]: Finished difference Result 2305 states and 3157 transitions. [2024-10-31 19:32:57,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 19:32:57,538 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 166 [2024-10-31 19:32:57,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 19:32:57,542 INFO L225 Difference]: With dead ends: 2305 [2024-10-31 19:32:57,542 INFO L226 Difference]: Without dead ends: 1174 [2024-10-31 19:32:57,543 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 19:32:57,544 INFO L432 NwaCegarLoop]: 183 mSDtfsCounter, 10 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 19:32:57,544 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 346 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 19:32:57,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1174 states. [2024-10-31 19:32:57,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1174 to 1174. [2024-10-31 19:32:57,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1174 states, 1173 states have (on average 1.3674339300937766) internal successors, (1604), 1173 states have internal predecessors, (1604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:32:57,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1174 states to 1174 states and 1604 transitions. [2024-10-31 19:32:57,560 INFO L78 Accepts]: Start accepts. Automaton has 1174 states and 1604 transitions. Word has length 166 [2024-10-31 19:32:57,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 19:32:57,560 INFO L471 AbstractCegarLoop]: Abstraction has 1174 states and 1604 transitions. [2024-10-31 19:32:57,560 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:32:57,560 INFO L276 IsEmpty]: Start isEmpty. Operand 1174 states and 1604 transitions. [2024-10-31 19:32:57,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2024-10-31 19:32:57,562 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 19:32:57,562 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 19:32:57,565 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (10)] Ended with exit code 0 [2024-10-31 19:32:57,762 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 19:32:57,762 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 19:32:57,763 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 19:32:57,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1259129354, now seen corresponding path program 1 times [2024-10-31 19:32:57,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 19:32:57,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1658229198] [2024-10-31 19:32:57,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 19:32:57,763 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-10-31 19:32:57,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-10-31 19:32:57,765 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 19:32:57,768 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 19:32:57,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 19:32:57,846 INFO L255 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-31 19:32:57,847 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 19:32:57,870 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2024-10-31 19:32:57,870 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 19:32:57,890 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2024-10-31 19:32:57,890 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 19:32:57,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1658229198] [2024-10-31 19:32:57,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1658229198] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 19:32:57,890 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 19:32:57,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2024-10-31 19:32:57,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411611686] [2024-10-31 19:32:57,890 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 19:32:57,891 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 19:32:57,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 19:32:57,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 19:32:57,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 19:32:57,891 INFO L87 Difference]: Start difference. First operand 1174 states and 1604 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:32:57,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 19:32:57,918 INFO L93 Difference]: Finished difference Result 2331 states and 3188 transitions. [2024-10-31 19:32:57,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 19:32:57,918 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 166 [2024-10-31 19:32:57,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 19:32:57,922 INFO L225 Difference]: With dead ends: 2331 [2024-10-31 19:32:57,922 INFO L226 Difference]: Without dead ends: 1176 [2024-10-31 19:32:57,923 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 19:32:57,923 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 19:32:57,924 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 19:32:57,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1176 states. [2024-10-31 19:32:57,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1176 to 1176. [2024-10-31 19:32:57,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1176 states, 1175 states have (on average 1.366808510638298) internal successors, (1606), 1175 states have internal predecessors, (1606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:32:57,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1176 states to 1176 states and 1606 transitions. [2024-10-31 19:32:57,939 INFO L78 Accepts]: Start accepts. Automaton has 1176 states and 1606 transitions. Word has length 166 [2024-10-31 19:32:57,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 19:32:57,939 INFO L471 AbstractCegarLoop]: Abstraction has 1176 states and 1606 transitions. [2024-10-31 19:32:57,939 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:32:57,939 INFO L276 IsEmpty]: Start isEmpty. Operand 1176 states and 1606 transitions. [2024-10-31 19:32:57,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2024-10-31 19:32:57,941 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 19:32:57,941 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 19:32:57,944 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2024-10-31 19:32:58,141 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 19:32:58,141 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 19:32:58,142 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 19:32:58,142 INFO L85 PathProgramCache]: Analyzing trace with hash -1724564893, now seen corresponding path program 1 times [2024-10-31 19:32:58,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 19:32:58,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [487654061] [2024-10-31 19:32:58,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 19:32:58,142 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-10-31 19:32:58,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-10-31 19:32:58,147 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 19:32:58,147 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 19:32:58,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 19:32:58,234 INFO L255 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-31 19:32:58,236 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 19:32:58,271 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 222 proven. 0 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2024-10-31 19:32:58,272 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 19:32:58,302 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 222 proven. 0 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2024-10-31 19:32:58,302 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 19:32:58,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [487654061] [2024-10-31 19:32:58,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [487654061] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 19:32:58,302 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 19:32:58,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2024-10-31 19:32:58,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080242735] [2024-10-31 19:32:58,302 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 19:32:58,303 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 19:32:58,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 19:32:58,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 19:32:58,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 19:32:58,303 INFO L87 Difference]: Start difference. First operand 1176 states and 1606 transitions. Second operand has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:32:58,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 19:32:58,449 INFO L93 Difference]: Finished difference Result 2455 states and 3399 transitions. [2024-10-31 19:32:58,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 19:32:58,450 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 202 [2024-10-31 19:32:58,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 19:32:58,453 INFO L225 Difference]: With dead ends: 2455 [2024-10-31 19:32:58,454 INFO L226 Difference]: Without dead ends: 1300 [2024-10-31 19:32:58,454 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 402 GetRequests, 401 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 19:32:58,455 INFO L432 NwaCegarLoop]: 185 mSDtfsCounter, 10 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 19:32:58,455 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 268 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 19:32:58,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1300 states. [2024-10-31 19:32:58,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1300 to 1300. [2024-10-31 19:32:58,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1300 states, 1299 states have (on average 1.3471901462663587) internal successors, (1750), 1299 states have internal predecessors, (1750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:32:58,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1300 states to 1300 states and 1750 transitions. [2024-10-31 19:32:58,471 INFO L78 Accepts]: Start accepts. Automaton has 1300 states and 1750 transitions. Word has length 202 [2024-10-31 19:32:58,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 19:32:58,471 INFO L471 AbstractCegarLoop]: Abstraction has 1300 states and 1750 transitions. [2024-10-31 19:32:58,471 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:32:58,471 INFO L276 IsEmpty]: Start isEmpty. Operand 1300 states and 1750 transitions. [2024-10-31 19:32:58,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2024-10-31 19:32:58,473 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 19:32:58,473 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 19:32:58,477 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 19:32:58,673 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 19:32:58,673 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 19:32:58,674 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 19:32:58,674 INFO L85 PathProgramCache]: Analyzing trace with hash 598072934, now seen corresponding path program 1 times [2024-10-31 19:32:58,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 19:32:58,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2128431173] [2024-10-31 19:32:58,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 19:32:58,674 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-10-31 19:32:58,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-10-31 19:32:58,676 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 19:32:58,677 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 19:32:58,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 19:32:58,788 INFO L255 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-31 19:32:58,790 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 19:32:58,833 INFO L134 CoverageAnalysis]: Checked inductivity of 458 backedges. 160 proven. 0 refuted. 0 times theorem prover too weak. 298 trivial. 0 not checked. [2024-10-31 19:32:58,833 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 19:32:58,876 INFO L134 CoverageAnalysis]: Checked inductivity of 458 backedges. 160 proven. 0 refuted. 0 times theorem prover too weak. 298 trivial. 0 not checked. [2024-10-31 19:32:58,877 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 19:32:58,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2128431173] [2024-10-31 19:32:58,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [2128431173] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 19:32:58,877 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 19:32:58,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2024-10-31 19:32:58,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945640517] [2024-10-31 19:32:58,877 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 19:32:58,877 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 19:32:58,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 19:32:58,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 19:32:58,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-31 19:32:58,878 INFO L87 Difference]: Start difference. First operand 1300 states and 1750 transitions. Second operand has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:32:59,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 19:32:59,063 INFO L93 Difference]: Finished difference Result 2647 states and 3669 transitions. [2024-10-31 19:32:59,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 19:32:59,063 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 229 [2024-10-31 19:32:59,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 19:32:59,066 INFO L225 Difference]: With dead ends: 2647 [2024-10-31 19:32:59,066 INFO L226 Difference]: Without dead ends: 1190 [2024-10-31 19:32:59,067 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 456 GetRequests, 454 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-31 19:32:59,067 INFO L432 NwaCegarLoop]: 123 mSDtfsCounter, 38 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-31 19:32:59,068 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 221 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-31 19:32:59,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1190 states. [2024-10-31 19:32:59,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1190 to 1190. [2024-10-31 19:32:59,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1190 states, 1189 states have (on average 1.3650126156433977) internal successors, (1623), 1189 states have internal predecessors, (1623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:32:59,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1190 states to 1190 states and 1623 transitions. [2024-10-31 19:32:59,083 INFO L78 Accepts]: Start accepts. Automaton has 1190 states and 1623 transitions. Word has length 229 [2024-10-31 19:32:59,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 19:32:59,083 INFO L471 AbstractCegarLoop]: Abstraction has 1190 states and 1623 transitions. [2024-10-31 19:32:59,083 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:32:59,083 INFO L276 IsEmpty]: Start isEmpty. Operand 1190 states and 1623 transitions. [2024-10-31 19:32:59,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2024-10-31 19:32:59,085 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 19:32:59,085 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 19:32:59,088 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 19:32:59,286 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 19:32:59,286 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 19:32:59,286 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 19:32:59,286 INFO L85 PathProgramCache]: Analyzing trace with hash 1622703552, now seen corresponding path program 1 times [2024-10-31 19:32:59,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 19:32:59,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [377525930] [2024-10-31 19:32:59,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 19:32:59,287 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-10-31 19:32:59,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-10-31 19:32:59,288 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 19:32:59,289 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 19:32:59,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 19:32:59,387 INFO L255 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-31 19:32:59,389 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 19:32:59,463 INFO L134 CoverageAnalysis]: Checked inductivity of 654 backedges. 493 proven. 0 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2024-10-31 19:32:59,463 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 19:32:59,532 INFO L134 CoverageAnalysis]: Checked inductivity of 654 backedges. 493 proven. 0 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2024-10-31 19:32:59,532 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 19:32:59,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [377525930] [2024-10-31 19:32:59,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [377525930] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 19:32:59,532 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 19:32:59,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2024-10-31 19:32:59,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918534992] [2024-10-31 19:32:59,532 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 19:32:59,532 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 19:32:59,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 19:32:59,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 19:32:59,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 19:32:59,533 INFO L87 Difference]: Start difference. First operand 1190 states and 1623 transitions. Second operand has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:32:59,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 19:32:59,554 INFO L93 Difference]: Finished difference Result 3319 states and 4579 transitions. [2024-10-31 19:32:59,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 19:32:59,554 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 269 [2024-10-31 19:32:59,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 19:32:59,557 INFO L225 Difference]: With dead ends: 3319 [2024-10-31 19:32:59,557 INFO L226 Difference]: Without dead ends: 1147 [2024-10-31 19:32:59,558 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 536 GetRequests, 535 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 19:32:59,559 INFO L432 NwaCegarLoop]: 289 mSDtfsCounter, 111 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 19:32:59,559 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 454 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 19:32:59,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1147 states. [2024-10-31 19:32:59,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1147 to 1147. [2024-10-31 19:32:59,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1147 states, 1146 states have (on average 1.369109947643979) internal successors, (1569), 1146 states have internal predecessors, (1569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:32:59,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1147 states to 1147 states and 1569 transitions. [2024-10-31 19:32:59,573 INFO L78 Accepts]: Start accepts. Automaton has 1147 states and 1569 transitions. Word has length 269 [2024-10-31 19:32:59,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 19:32:59,574 INFO L471 AbstractCegarLoop]: Abstraction has 1147 states and 1569 transitions. [2024-10-31 19:32:59,574 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:32:59,574 INFO L276 IsEmpty]: Start isEmpty. Operand 1147 states and 1569 transitions. [2024-10-31 19:32:59,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2024-10-31 19:32:59,576 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 19:32:59,576 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 8, 8, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 19:32:59,579 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 19:32:59,778 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 19:32:59,778 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 19:32:59,779 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 19:32:59,779 INFO L85 PathProgramCache]: Analyzing trace with hash 746936446, now seen corresponding path program 1 times [2024-10-31 19:32:59,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 19:32:59,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1423492020] [2024-10-31 19:32:59,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 19:32:59,779 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-10-31 19:32:59,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-10-31 19:32:59,784 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 19:32:59,784 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 19:32:59,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 19:32:59,915 INFO L255 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-31 19:32:59,917 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 19:32:59,944 INFO L134 CoverageAnalysis]: Checked inductivity of 954 backedges. 500 proven. 0 refuted. 0 times theorem prover too weak. 454 trivial. 0 not checked. [2024-10-31 19:32:59,944 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 19:32:59,972 INFO L134 CoverageAnalysis]: Checked inductivity of 954 backedges. 500 proven. 0 refuted. 0 times theorem prover too weak. 454 trivial. 0 not checked. [2024-10-31 19:32:59,972 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 19:32:59,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1423492020] [2024-10-31 19:32:59,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1423492020] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 19:32:59,973 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 19:32:59,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2024-10-31 19:32:59,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945985748] [2024-10-31 19:32:59,973 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 19:32:59,973 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 19:32:59,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 19:32:59,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 19:32:59,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 19:32:59,974 INFO L87 Difference]: Start difference. First operand 1147 states and 1569 transitions. Second operand has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:33:00,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 19:33:00,084 INFO L93 Difference]: Finished difference Result 2354 states and 3245 transitions. [2024-10-31 19:33:00,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 19:33:00,087 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 315 [2024-10-31 19:33:00,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 19:33:00,090 INFO L225 Difference]: With dead ends: 2354 [2024-10-31 19:33:00,090 INFO L226 Difference]: Without dead ends: 1228 [2024-10-31 19:33:00,091 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 628 GetRequests, 627 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 19:33:00,091 INFO L432 NwaCegarLoop]: 177 mSDtfsCounter, 9 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 19:33:00,091 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 262 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 19:33:00,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1228 states. [2024-10-31 19:33:00,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1228 to 1228. [2024-10-31 19:33:00,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1228 states, 1227 states have (on average 1.3569682151589242) internal successors, (1665), 1227 states have internal predecessors, (1665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:33:00,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1228 states to 1228 states and 1665 transitions. [2024-10-31 19:33:00,106 INFO L78 Accepts]: Start accepts. Automaton has 1228 states and 1665 transitions. Word has length 315 [2024-10-31 19:33:00,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 19:33:00,107 INFO L471 AbstractCegarLoop]: Abstraction has 1228 states and 1665 transitions. [2024-10-31 19:33:00,107 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:33:00,107 INFO L276 IsEmpty]: Start isEmpty. Operand 1228 states and 1665 transitions. [2024-10-31 19:33:00,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2024-10-31 19:33:00,109 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 19:33:00,110 INFO L215 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 9, 9, 8, 8, 7, 7, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 19:33:00,116 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 19:33:00,312 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 19:33:00,312 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 19:33:00,312 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 19:33:00,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1865013778, now seen corresponding path program 1 times [2024-10-31 19:33:00,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 19:33:00,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1710765045] [2024-10-31 19:33:00,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 19:33:00,313 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-10-31 19:33:00,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-10-31 19:33:00,318 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 19:33:00,319 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 19:33:00,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 19:33:00,432 INFO L255 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-31 19:33:00,435 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 19:33:00,465 INFO L134 CoverageAnalysis]: Checked inductivity of 1151 backedges. 642 proven. 0 refuted. 0 times theorem prover too weak. 509 trivial. 0 not checked. [2024-10-31 19:33:00,465 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 19:33:00,492 INFO L134 CoverageAnalysis]: Checked inductivity of 1151 backedges. 642 proven. 0 refuted. 0 times theorem prover too weak. 509 trivial. 0 not checked. [2024-10-31 19:33:00,492 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 19:33:00,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1710765045] [2024-10-31 19:33:00,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1710765045] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 19:33:00,492 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 19:33:00,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2024-10-31 19:33:00,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352878476] [2024-10-31 19:33:00,492 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 19:33:00,493 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 19:33:00,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 19:33:00,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 19:33:00,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 19:33:00,493 INFO L87 Difference]: Start difference. First operand 1228 states and 1665 transitions. Second operand has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:33:00,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 19:33:00,593 INFO L93 Difference]: Finished difference Result 2522 states and 3449 transitions. [2024-10-31 19:33:00,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 19:33:00,595 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 338 [2024-10-31 19:33:00,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 19:33:00,598 INFO L225 Difference]: With dead ends: 2522 [2024-10-31 19:33:00,598 INFO L226 Difference]: Without dead ends: 1315 [2024-10-31 19:33:00,600 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 674 GetRequests, 673 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 19:33:00,600 INFO L432 NwaCegarLoop]: 177 mSDtfsCounter, 9 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 19:33:00,601 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 262 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 19:33:00,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1315 states. [2024-10-31 19:33:00,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1315 to 1315. [2024-10-31 19:33:00,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1315 states, 1314 states have (on average 1.3447488584474885) internal successors, (1767), 1314 states have internal predecessors, (1767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:33:00,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1315 states to 1315 states and 1767 transitions. [2024-10-31 19:33:00,616 INFO L78 Accepts]: Start accepts. Automaton has 1315 states and 1767 transitions. Word has length 338 [2024-10-31 19:33:00,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 19:33:00,617 INFO L471 AbstractCegarLoop]: Abstraction has 1315 states and 1767 transitions. [2024-10-31 19:33:00,617 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:33:00,617 INFO L276 IsEmpty]: Start isEmpty. Operand 1315 states and 1767 transitions. [2024-10-31 19:33:00,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 371 [2024-10-31 19:33:00,620 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 19:33:00,620 INFO L215 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 10, 10, 9, 9, 8, 8, 7, 7, 7, 7, 5, 5, 5, 5, 5, 5, 5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 19:33:00,630 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2024-10-31 19:33:00,820 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 19:33:00,820 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 19:33:00,821 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 19:33:00,821 INFO L85 PathProgramCache]: Analyzing trace with hash -1876884711, now seen corresponding path program 1 times [2024-10-31 19:33:00,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 19:33:00,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1524258446] [2024-10-31 19:33:00,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 19:33:00,821 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-10-31 19:33:00,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-10-31 19:33:00,823 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 19:33:00,824 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 19:33:00,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 19:33:00,943 INFO L255 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-31 19:33:00,946 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 19:33:01,013 INFO L134 CoverageAnalysis]: Checked inductivity of 1396 backedges. 699 proven. 0 refuted. 0 times theorem prover too weak. 697 trivial. 0 not checked. [2024-10-31 19:33:01,013 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 19:33:01,073 INFO L134 CoverageAnalysis]: Checked inductivity of 1396 backedges. 699 proven. 0 refuted. 0 times theorem prover too weak. 697 trivial. 0 not checked. [2024-10-31 19:33:01,073 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 19:33:01,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1524258446] [2024-10-31 19:33:01,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1524258446] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 19:33:01,074 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 19:33:01,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2024-10-31 19:33:01,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810161842] [2024-10-31 19:33:01,074 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 19:33:01,074 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 19:33:01,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 19:33:01,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 19:33:01,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 19:33:01,075 INFO L87 Difference]: Start difference. First operand 1315 states and 1767 transitions. Second operand has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:33:01,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 19:33:01,123 INFO L93 Difference]: Finished difference Result 3897 states and 5242 transitions. [2024-10-31 19:33:01,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 19:33:01,123 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 370 [2024-10-31 19:33:01,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 19:33:01,129 INFO L225 Difference]: With dead ends: 3897 [2024-10-31 19:33:01,129 INFO L226 Difference]: Without dead ends: 2603 [2024-10-31 19:33:01,130 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 738 GetRequests, 737 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 19:33:01,131 INFO L432 NwaCegarLoop]: 205 mSDtfsCounter, 121 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 19:33:01,131 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 366 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 19:33:01,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2603 states. [2024-10-31 19:33:01,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2603 to 2601. [2024-10-31 19:33:01,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2601 states, 2600 states have (on average 1.3434615384615385) internal successors, (3493), 2600 states have internal predecessors, (3493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:33:01,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2601 states to 2601 states and 3493 transitions. [2024-10-31 19:33:01,177 INFO L78 Accepts]: Start accepts. Automaton has 2601 states and 3493 transitions. Word has length 370 [2024-10-31 19:33:01,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 19:33:01,178 INFO L471 AbstractCegarLoop]: Abstraction has 2601 states and 3493 transitions. [2024-10-31 19:33:01,178 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:33:01,178 INFO L276 IsEmpty]: Start isEmpty. Operand 2601 states and 3493 transitions. [2024-10-31 19:33:01,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 372 [2024-10-31 19:33:01,183 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 19:33:01,184 INFO L215 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 10, 10, 9, 9, 8, 8, 7, 7, 7, 7, 5, 5, 5, 5, 5, 5, 5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 19:33:01,187 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 19:33:01,384 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 19:33:01,384 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 19:33:01,385 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 19:33:01,385 INFO L85 PathProgramCache]: Analyzing trace with hash -59651589, now seen corresponding path program 1 times [2024-10-31 19:33:01,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 19:33:01,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1967966119] [2024-10-31 19:33:01,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 19:33:01,385 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-10-31 19:33:01,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-10-31 19:33:01,387 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 19:33:01,392 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 19:33:01,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 19:33:01,549 INFO L255 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-31 19:33:01,552 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 19:33:01,630 INFO L134 CoverageAnalysis]: Checked inductivity of 1396 backedges. 875 proven. 26 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2024-10-31 19:33:01,630 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 19:33:01,698 INFO L134 CoverageAnalysis]: Checked inductivity of 1396 backedges. 875 proven. 26 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2024-10-31 19:33:01,698 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 19:33:01,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1967966119] [2024-10-31 19:33:01,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1967966119] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 19:33:01,699 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 19:33:01,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2024-10-31 19:33:01,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684641209] [2024-10-31 19:33:01,699 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 19:33:01,700 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 19:33:01,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 19:33:01,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 19:33:01,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 19:33:01,700 INFO L87 Difference]: Start difference. First operand 2601 states and 3493 transitions. Second operand has 4 states, 4 states have (on average 42.25) internal successors, (169), 4 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:33:01,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 19:33:01,931 INFO L93 Difference]: Finished difference Result 7467 states and 9907 transitions. [2024-10-31 19:33:01,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 19:33:01,935 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 42.25) internal successors, (169), 4 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 371 [2024-10-31 19:33:01,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 19:33:01,946 INFO L225 Difference]: With dead ends: 7467 [2024-10-31 19:33:01,946 INFO L226 Difference]: Without dead ends: 4887 [2024-10-31 19:33:01,950 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 742 GetRequests, 739 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-10-31 19:33:01,951 INFO L432 NwaCegarLoop]: 266 mSDtfsCounter, 134 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 563 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-31 19:33:01,951 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 563 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-31 19:33:01,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4887 states. [2024-10-31 19:33:02,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4887 to 3243. [2024-10-31 19:33:02,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3243 states, 3242 states have (on average 1.3439235040098705) internal successors, (4357), 3242 states have internal predecessors, (4357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:33:02,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3243 states to 3243 states and 4357 transitions. [2024-10-31 19:33:02,012 INFO L78 Accepts]: Start accepts. Automaton has 3243 states and 4357 transitions. Word has length 371 [2024-10-31 19:33:02,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 19:33:02,013 INFO L471 AbstractCegarLoop]: Abstraction has 3243 states and 4357 transitions. [2024-10-31 19:33:02,013 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 42.25) internal successors, (169), 4 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:33:02,013 INFO L276 IsEmpty]: Start isEmpty. Operand 3243 states and 4357 transitions. [2024-10-31 19:33:02,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 402 [2024-10-31 19:33:02,016 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 19:33:02,016 INFO L215 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 11, 11, 10, 10, 9, 9, 8, 8, 8, 8, 6, 5, 5, 5, 5, 5, 5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 19:33:02,023 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (18)] Ended with exit code 0 [2024-10-31 19:33:02,217 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 19:33:02,218 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 19:33:02,218 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 19:33:02,218 INFO L85 PathProgramCache]: Analyzing trace with hash -1792598736, now seen corresponding path program 1 times [2024-10-31 19:33:02,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 19:33:02,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1415768958] [2024-10-31 19:33:02,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 19:33:02,219 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-10-31 19:33:02,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-10-31 19:33:02,220 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 19:33:02,221 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 19:33:02,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 19:33:02,370 INFO L255 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-31 19:33:02,373 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 19:33:02,428 INFO L134 CoverageAnalysis]: Checked inductivity of 1670 backedges. 916 proven. 0 refuted. 0 times theorem prover too weak. 754 trivial. 0 not checked. [2024-10-31 19:33:02,428 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 19:33:02,453 INFO L134 CoverageAnalysis]: Checked inductivity of 1670 backedges. 916 proven. 0 refuted. 0 times theorem prover too weak. 754 trivial. 0 not checked. [2024-10-31 19:33:02,454 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 19:33:02,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1415768958] [2024-10-31 19:33:02,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1415768958] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 19:33:02,454 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 19:33:02,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2024-10-31 19:33:02,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401639003] [2024-10-31 19:33:02,454 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 19:33:02,455 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 19:33:02,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 19:33:02,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 19:33:02,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 19:33:02,455 INFO L87 Difference]: Start difference. First operand 3243 states and 4357 transitions. Second operand has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:33:02,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 19:33:02,573 INFO L93 Difference]: Finished difference Result 6705 states and 9049 transitions. [2024-10-31 19:33:02,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 19:33:02,576 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 401 [2024-10-31 19:33:02,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 19:33:02,585 INFO L225 Difference]: With dead ends: 6705 [2024-10-31 19:33:02,585 INFO L226 Difference]: Without dead ends: 3483 [2024-10-31 19:33:02,588 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 800 GetRequests, 799 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 19:33:02,589 INFO L432 NwaCegarLoop]: 179 mSDtfsCounter, 9 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 19:33:02,589 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 264 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 19:33:02,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3483 states. [2024-10-31 19:33:02,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3483 to 3363. [2024-10-31 19:33:02,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3363 states, 3362 states have (on average 1.3405710886377156) internal successors, (4507), 3362 states have internal predecessors, (4507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:33:02,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3363 states to 3363 states and 4507 transitions. [2024-10-31 19:33:02,639 INFO L78 Accepts]: Start accepts. Automaton has 3363 states and 4507 transitions. Word has length 401 [2024-10-31 19:33:02,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 19:33:02,639 INFO L471 AbstractCegarLoop]: Abstraction has 3363 states and 4507 transitions. [2024-10-31 19:33:02,639 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:33:02,639 INFO L276 IsEmpty]: Start isEmpty. Operand 3363 states and 4507 transitions. [2024-10-31 19:33:02,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 403 [2024-10-31 19:33:02,643 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 19:33:02,644 INFO L215 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 11, 11, 10, 10, 9, 9, 8, 8, 8, 8, 6, 5, 5, 5, 5, 5, 5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 19:33:02,648 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (19)] Ended with exit code 0 [2024-10-31 19:33:02,844 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 19:33:02,844 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 19:33:02,845 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 19:33:02,845 INFO L85 PathProgramCache]: Analyzing trace with hash 571180815, now seen corresponding path program 1 times [2024-10-31 19:33:02,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 19:33:02,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [444730828] [2024-10-31 19:33:02,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 19:33:02,845 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-10-31 19:33:02,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-10-31 19:33:02,850 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 19:33:02,854 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 19:33:02,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 19:33:02,995 INFO L255 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-31 19:33:02,997 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 19:33:03,034 INFO L134 CoverageAnalysis]: Checked inductivity of 1670 backedges. 983 proven. 0 refuted. 0 times theorem prover too weak. 687 trivial. 0 not checked. [2024-10-31 19:33:03,035 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 19:33:03,070 INFO L134 CoverageAnalysis]: Checked inductivity of 1670 backedges. 983 proven. 0 refuted. 0 times theorem prover too weak. 687 trivial. 0 not checked. [2024-10-31 19:33:03,070 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 19:33:03,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [444730828] [2024-10-31 19:33:03,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [444730828] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 19:33:03,070 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 19:33:03,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2024-10-31 19:33:03,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437873443] [2024-10-31 19:33:03,070 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 19:33:03,071 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 19:33:03,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 19:33:03,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 19:33:03,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 19:33:03,071 INFO L87 Difference]: Start difference. First operand 3363 states and 4507 transitions. Second operand has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:33:03,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 19:33:03,210 INFO L93 Difference]: Finished difference Result 7113 states and 9685 transitions. [2024-10-31 19:33:03,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 19:33:03,213 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 402 [2024-10-31 19:33:03,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 19:33:03,224 INFO L225 Difference]: With dead ends: 7113 [2024-10-31 19:33:03,224 INFO L226 Difference]: Without dead ends: 3771 [2024-10-31 19:33:03,226 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 802 GetRequests, 801 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 19:33:03,227 INFO L432 NwaCegarLoop]: 177 mSDtfsCounter, 9 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 19:33:03,227 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 262 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 19:33:03,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3771 states. [2024-10-31 19:33:03,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3771 to 3771. [2024-10-31 19:33:03,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3771 states, 3770 states have (on average 1.3196286472148542) internal successors, (4975), 3770 states have internal predecessors, (4975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:33:03,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3771 states to 3771 states and 4975 transitions. [2024-10-31 19:33:03,341 INFO L78 Accepts]: Start accepts. Automaton has 3771 states and 4975 transitions. Word has length 402 [2024-10-31 19:33:03,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 19:33:03,341 INFO L471 AbstractCegarLoop]: Abstraction has 3771 states and 4975 transitions. [2024-10-31 19:33:03,341 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:33:03,341 INFO L276 IsEmpty]: Start isEmpty. Operand 3771 states and 4975 transitions. [2024-10-31 19:33:03,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2024-10-31 19:33:03,348 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 19:33:03,349 INFO L215 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 12, 12, 11, 11, 10, 10, 9, 9, 9, 9, 7, 6, 6, 5, 5, 5, 5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 19:33:03,352 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2024-10-31 19:33:03,549 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 19:33:03,549 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 19:33:03,550 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 19:33:03,550 INFO L85 PathProgramCache]: Analyzing trace with hash 1646161403, now seen corresponding path program 1 times [2024-10-31 19:33:03,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 19:33:03,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [473352566] [2024-10-31 19:33:03,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 19:33:03,551 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-10-31 19:33:03,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-10-31 19:33:03,559 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 19:33:03,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2024-10-31 19:33:03,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 19:33:03,708 INFO L255 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-31 19:33:03,711 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 19:33:03,752 INFO L134 CoverageAnalysis]: Checked inductivity of 1981 backedges. 1162 proven. 0 refuted. 0 times theorem prover too weak. 819 trivial. 0 not checked. [2024-10-31 19:33:03,752 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 19:33:03,790 INFO L134 CoverageAnalysis]: Checked inductivity of 1981 backedges. 1162 proven. 0 refuted. 0 times theorem prover too weak. 819 trivial. 0 not checked. [2024-10-31 19:33:03,790 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 19:33:03,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [473352566] [2024-10-31 19:33:03,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [473352566] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 19:33:03,790 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 19:33:03,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2024-10-31 19:33:03,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212830881] [2024-10-31 19:33:03,790 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 19:33:03,791 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 19:33:03,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 19:33:03,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 19:33:03,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 19:33:03,791 INFO L87 Difference]: Start difference. First operand 3771 states and 4975 transitions. Second operand has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:33:03,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 19:33:03,937 INFO L93 Difference]: Finished difference Result 7509 states and 9907 transitions. [2024-10-31 19:33:03,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 19:33:03,941 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 433 [2024-10-31 19:33:03,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 19:33:03,948 INFO L225 Difference]: With dead ends: 7509 [2024-10-31 19:33:03,949 INFO L226 Difference]: Without dead ends: 3759 [2024-10-31 19:33:03,952 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 864 GetRequests, 863 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 19:33:03,953 INFO L432 NwaCegarLoop]: 177 mSDtfsCounter, 9 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 19:33:03,953 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 262 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 19:33:03,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3759 states. [2024-10-31 19:33:03,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3759 to 3309. [2024-10-31 19:33:03,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3309 states, 3308 states have (on average 1.2681378476420797) internal successors, (4195), 3308 states have internal predecessors, (4195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:33:03,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3309 states to 3309 states and 4195 transitions. [2024-10-31 19:33:03,994 INFO L78 Accepts]: Start accepts. Automaton has 3309 states and 4195 transitions. Word has length 433 [2024-10-31 19:33:03,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 19:33:03,994 INFO L471 AbstractCegarLoop]: Abstraction has 3309 states and 4195 transitions. [2024-10-31 19:33:03,994 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:33:03,994 INFO L276 IsEmpty]: Start isEmpty. Operand 3309 states and 4195 transitions. [2024-10-31 19:33:03,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 467 [2024-10-31 19:33:03,998 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 19:33:03,998 INFO L215 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 13, 13, 12, 12, 11, 11, 10, 10, 10, 10, 8, 7, 7, 6, 6, 5, 5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 19:33:04,007 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2024-10-31 19:33:04,200 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-10-31 19:33:04,201 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 19:33:04,201 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 19:33:04,201 INFO L85 PathProgramCache]: Analyzing trace with hash 912404788, now seen corresponding path program 1 times [2024-10-31 19:33:04,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 19:33:04,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [95786889] [2024-10-31 19:33:04,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 19:33:04,201 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-10-31 19:33:04,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-10-31 19:33:04,203 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-10-31 19:33:04,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2024-10-31 19:33:04,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 19:33:04,358 INFO L255 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-31 19:33:04,361 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 19:33:04,402 INFO L134 CoverageAnalysis]: Checked inductivity of 2331 backedges. 1351 proven. 0 refuted. 0 times theorem prover too weak. 980 trivial. 0 not checked. [2024-10-31 19:33:04,402 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 19:33:04,441 INFO L134 CoverageAnalysis]: Checked inductivity of 2331 backedges. 1351 proven. 0 refuted. 0 times theorem prover too weak. 980 trivial. 0 not checked. [2024-10-31 19:33:04,441 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 19:33:04,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [95786889] [2024-10-31 19:33:04,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [95786889] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 19:33:04,441 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 19:33:04,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2024-10-31 19:33:04,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863193433] [2024-10-31 19:33:04,442 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 19:33:04,442 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 19:33:04,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 19:33:04,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 19:33:04,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 19:33:04,446 INFO L87 Difference]: Start difference. First operand 3309 states and 4195 transitions. Second operand has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:33:04,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 19:33:04,639 INFO L93 Difference]: Finished difference Result 6417 states and 8093 transitions. [2024-10-31 19:33:04,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 19:33:04,639 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 466 [2024-10-31 19:33:04,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 19:33:04,644 INFO L225 Difference]: With dead ends: 6417 [2024-10-31 19:33:04,644 INFO L226 Difference]: Without dead ends: 3129 [2024-10-31 19:33:04,647 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 930 GetRequests, 929 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 19:33:04,648 INFO L432 NwaCegarLoop]: 176 mSDtfsCounter, 13 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 19:33:04,648 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 261 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 19:33:04,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3129 states. [2024-10-31 19:33:04,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3129 to 3117. [2024-10-31 19:33:04,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3117 states, 3116 states have (on average 1.2102053915275994) internal successors, (3771), 3116 states have internal predecessors, (3771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:33:04,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3117 states to 3117 states and 3771 transitions. [2024-10-31 19:33:04,681 INFO L78 Accepts]: Start accepts. Automaton has 3117 states and 3771 transitions. Word has length 466 [2024-10-31 19:33:04,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 19:33:04,682 INFO L471 AbstractCegarLoop]: Abstraction has 3117 states and 3771 transitions. [2024-10-31 19:33:04,682 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:33:04,682 INFO L276 IsEmpty]: Start isEmpty. Operand 3117 states and 3771 transitions. [2024-10-31 19:33:04,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 505 [2024-10-31 19:33:04,686 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 19:33:04,686 INFO L215 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 14, 14, 13, 13, 12, 12, 11, 11, 11, 11, 9, 8, 8, 7, 7, 6, 6, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 19:33:04,695 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (22)] Ended with exit code 0 [2024-10-31 19:33:04,886 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-10-31 19:33:04,886 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 19:33:04,887 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 19:33:04,887 INFO L85 PathProgramCache]: Analyzing trace with hash 325769247, now seen corresponding path program 1 times [2024-10-31 19:33:04,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 19:33:04,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1298599550] [2024-10-31 19:33:04,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 19:33:04,887 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-10-31 19:33:04,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-10-31 19:33:04,888 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-10-31 19:33:04,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2024-10-31 19:33:05,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 19:33:05,047 INFO L255 TraceCheckSpWp]: Trace formula consists of 554 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-31 19:33:05,050 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 19:33:05,125 INFO L134 CoverageAnalysis]: Checked inductivity of 2727 backedges. 1308 proven. 26 refuted. 0 times theorem prover too weak. 1393 trivial. 0 not checked. [2024-10-31 19:33:05,126 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 19:33:05,191 INFO L134 CoverageAnalysis]: Checked inductivity of 2727 backedges. 1308 proven. 26 refuted. 0 times theorem prover too weak. 1393 trivial. 0 not checked. [2024-10-31 19:33:05,191 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 19:33:05,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1298599550] [2024-10-31 19:33:05,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1298599550] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 19:33:05,191 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 19:33:05,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2024-10-31 19:33:05,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654810661] [2024-10-31 19:33:05,191 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 19:33:05,193 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-31 19:33:05,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 19:33:05,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-31 19:33:05,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-31 19:33:05,196 INFO L87 Difference]: Start difference. First operand 3117 states and 3771 transitions. Second operand has 6 states, 6 states have (on average 46.0) internal successors, (276), 6 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:33:05,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 19:33:05,499 INFO L93 Difference]: Finished difference Result 4438 states and 5392 transitions. [2024-10-31 19:33:05,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-31 19:33:05,500 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 46.0) internal successors, (276), 6 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 504 [2024-10-31 19:33:05,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 19:33:05,501 INFO L225 Difference]: With dead ends: 4438 [2024-10-31 19:33:05,501 INFO L226 Difference]: Without dead ends: 0 [2024-10-31 19:33:05,504 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1012 GetRequests, 1005 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2024-10-31 19:33:05,504 INFO L432 NwaCegarLoop]: 181 mSDtfsCounter, 154 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 488 SdHoareTripleChecker+Invalid, 433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-31 19:33:05,504 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 488 Invalid, 433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 386 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-31 19:33:05,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-10-31 19:33:05,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-10-31 19:33:05,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:33:05,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-10-31 19:33:05,505 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 504 [2024-10-31 19:33:05,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 19:33:05,505 INFO L471 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-10-31 19:33:05,505 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 46.0) internal successors, (276), 6 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:33:05,505 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-10-31 19:33:05,505 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-10-31 19:33:05,507 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-10-31 19:33:05,510 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2024-10-31 19:33:05,710 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-10-31 19:33:05,712 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 19:33:05,715 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-10-31 19:33:06,553 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2024-10-31 19:33:06,585 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.10 07:33:06 BoogieIcfgContainer [2024-10-31 19:33:06,585 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-10-31 19:33:06,585 INFO L158 Benchmark]: Toolchain (without parser) took 14928.58ms. Allocated memory was 226.5MB in the beginning and 474.0MB in the end (delta: 247.5MB). Free memory was 200.2MB in the beginning and 315.0MB in the end (delta: -114.8MB). Peak memory consumption was 236.9MB. Max. memory is 8.0GB. [2024-10-31 19:33:06,586 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 226.5MB. Free memory is still 202.8MB. There was no memory consumed. Max. memory is 8.0GB. [2024-10-31 19:33:06,586 INFO L158 Benchmark]: CACSL2BoogieTranslator took 402.35ms. Allocated memory is still 226.5MB. Free memory was 200.2MB in the beginning and 181.9MB in the end (delta: 18.3MB). Peak memory consumption was 17.8MB. Max. memory is 8.0GB. [2024-10-31 19:33:06,586 INFO L158 Benchmark]: Boogie Procedure Inliner took 39.01ms. Allocated memory is still 226.5MB. Free memory was 181.9MB in the beginning and 179.3MB in the end (delta: 2.7MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. [2024-10-31 19:33:06,589 INFO L158 Benchmark]: Boogie Preprocessor took 36.20ms. Allocated memory is still 226.5MB. Free memory was 178.9MB in the beginning and 175.7MB in the end (delta: 3.2MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. [2024-10-31 19:33:06,589 INFO L158 Benchmark]: RCFGBuilder took 583.21ms. Allocated memory is still 226.5MB. Free memory was 175.7MB in the beginning and 174.1MB in the end (delta: 1.6MB). Peak memory consumption was 15.0MB. Max. memory is 8.0GB. [2024-10-31 19:33:06,590 INFO L158 Benchmark]: TraceAbstraction took 13861.26ms. Allocated memory was 226.5MB in the beginning and 474.0MB in the end (delta: 247.5MB). Free memory was 173.1MB in the beginning and 315.0MB in the end (delta: -141.9MB). Peak memory consumption was 210.4MB. Max. memory is 8.0GB. [2024-10-31 19:33:06,591 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 226.5MB. Free memory is still 202.8MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 402.35ms. Allocated memory is still 226.5MB. Free memory was 200.2MB in the beginning and 181.9MB in the end (delta: 18.3MB). Peak memory consumption was 17.8MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 39.01ms. Allocated memory is still 226.5MB. Free memory was 181.9MB in the beginning and 179.3MB in the end (delta: 2.7MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 36.20ms. Allocated memory is still 226.5MB. Free memory was 178.9MB in the beginning and 175.7MB in the end (delta: 3.2MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. * RCFGBuilder took 583.21ms. Allocated memory is still 226.5MB. Free memory was 175.7MB in the beginning and 174.1MB in the end (delta: 1.6MB). Peak memory consumption was 15.0MB. Max. memory is 8.0GB. * TraceAbstraction took 13861.26ms. Allocated memory was 226.5MB in the beginning and 474.0MB in the end (delta: 247.5MB). Free memory was 173.1MB in the beginning and 315.0MB in the end (delta: -141.9MB). Peak memory consumption was 210.4MB. 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: 678]: 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: 12.9s, OverallIterations: 22, TraceHistogramMax: 16, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.1s, AutomataDifference: 3.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1145 SdHoareTripleChecker+Valid, 2.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1145 mSDsluCounter, 7190 SdHoareTripleChecker+Invalid, 2.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2966 mSDsCounter, 367 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2350 IncrementalHoareTripleChecker+Invalid, 2717 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 367 mSolverCounterUnsat, 4224 mSDtfsCounter, 2350 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 10764 GetRequests, 10731 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=3771occurred in iteration=19, InterpolantAutomatonStates: 75, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.6s AutomataMinimizationTime, 22 MinimizatonAttempts, 2242 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 2.2s InterpolantComputationTime, 5400 NumberOfCodeBlocks, 5400 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 10756 ConstructedInterpolants, 0 QuantifiedInterpolants, 14227 SizeOfPredicates, 2 NumberOfNonLiveVariables, 6191 ConjunctsInSsa, 49 ConjunctsInUnsatCore, 44 InterpolantComputations, 40 PerfectInterpolantSequences, 35446/35550 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 109]: Loop Invariant Derived loop invariant: ((((((((((((((((((((blastFlag == 2) && (8466 == s__state)) && (s__s3__tmp__next_state___0 != 8640)) || ((blastFlag == 2) && (8512 == s__state))) || (((8448 == s__state) && (blastFlag == 2)) && (s__s3__tmp__next_state___0 == 8576))) || ((blastFlag != 4) && (0 != s__hit))) || ((blastFlag == 2) && (8560 == s__state))) || (((blastFlag == 2) && (s__s3__tmp__next_state___0 != 8640)) && (8592 == s__state))) || (((8448 == s__state) && (s__s3__tmp__next_state___0 == 3)) && (blastFlag == 3))) || ((blastFlag == 0) && (8464 == s__state))) || ((8672 == s__state) && (blastFlag == 3))) || ((blastFlag == 2) && (8640 == s__state))) || ((blastFlag == 1) && (8496 == s__state))) || (((blastFlag == 2) && (8608 == s__state)) && (s__s3__tmp__next_state___0 != 8640))) || (3 == s__state)) || ((blastFlag == 2) && (8544 == s__state))) || (((blastFlag == 2) && (s__s3__tmp__next_state___0 != 8640)) && (8496 == s__state))) || ((blastFlag == 2) && (8528 == s__state))) || (((blastFlag == 2) && (s__s3__tmp__next_state___0 == 8576)) && (8576 == s__state))) || ((blastFlag == 2) && (8656 == s__state))) RESULT: Ultimate proved your program to be correct! [2024-10-31 19:33:06,637 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...