./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/soft_float_3a.c.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 61a67961 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/soft_float_3a.c.cil.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 95f89ee6bcff8f17eb3e93b344abecdfb8ddea0894d1b25afafccf6235d7ced6 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.fs.cvc5-61a6796-m [2024-10-13 22:39:44,768 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-13 22:39:44,834 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-13 22:39:44,839 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-13 22:39:44,841 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-13 22:39:44,864 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-13 22:39:44,865 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-13 22:39:44,865 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-13 22:39:44,866 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-13 22:39:44,867 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-13 22:39:44,867 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-13 22:39:44,867 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-13 22:39:44,868 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-13 22:39:44,868 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-13 22:39:44,870 INFO L153 SettingsManager]: * Use SBE=true [2024-10-13 22:39:44,870 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-13 22:39:44,870 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-13 22:39:44,870 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-13 22:39:44,871 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-13 22:39:44,871 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-13 22:39:44,871 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-13 22:39:44,872 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-13 22:39:44,872 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-13 22:39:44,872 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-13 22:39:44,872 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-13 22:39:44,872 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-13 22:39:44,873 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-13 22:39:44,873 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-13 22:39:44,873 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-13 22:39:44,873 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-13 22:39:44,874 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-13 22:39:44,874 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-13 22:39:44,874 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 22:39:44,874 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-13 22:39:44,874 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-13 22:39:44,874 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-13 22:39:44,874 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-13 22:39:44,875 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-13 22:39:44,875 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-13 22:39:44,875 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-13 22:39:44,875 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-13 22:39:44,875 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-13 22:39:44,876 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 95f89ee6bcff8f17eb3e93b344abecdfb8ddea0894d1b25afafccf6235d7ced6 [2024-10-13 22:39:45,071 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-13 22:39:45,089 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-13 22:39:45,092 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-13 22:39:45,093 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-13 22:39:45,093 INFO L274 PluginConnector]: CDTParser initialized [2024-10-13 22:39:45,093 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/soft_float_3a.c.cil.c [2024-10-13 22:39:46,336 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-13 22:39:46,486 INFO L384 CDTParser]: Found 1 translation units. [2024-10-13 22:39:46,489 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/soft_float_3a.c.cil.c [2024-10-13 22:39:46,501 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1263dbaa9/853bab8411e34c1692772f2346628acb/FLAG1c344878b [2024-10-13 22:39:46,893 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1263dbaa9/853bab8411e34c1692772f2346628acb [2024-10-13 22:39:46,898 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-13 22:39:46,899 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-13 22:39:46,901 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-13 22:39:46,901 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-13 22:39:46,905 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-13 22:39:46,905 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:39:46" (1/1) ... [2024-10-13 22:39:46,906 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4592f211 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:39:46, skipping insertion in model container [2024-10-13 22:39:46,906 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:39:46" (1/1) ... [2024-10-13 22:39:46,928 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-13 22:39:47,048 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/soft_float_3a.c.cil.c[728,741] [2024-10-13 22:39:47,090 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 22:39:47,099 INFO L200 MainTranslator]: Completed pre-run [2024-10-13 22:39:47,108 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/soft_float_3a.c.cil.c[728,741] [2024-10-13 22:39:47,125 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 22:39:47,137 INFO L204 MainTranslator]: Completed translation [2024-10-13 22:39:47,138 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:39:47 WrapperNode [2024-10-13 22:39:47,138 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-13 22:39:47,139 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-13 22:39:47,139 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-13 22:39:47,139 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-13 22:39:47,144 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:39:47" (1/1) ... [2024-10-13 22:39:47,150 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:39:47" (1/1) ... [2024-10-13 22:39:47,173 INFO L138 Inliner]: procedures = 17, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 147 [2024-10-13 22:39:47,173 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-13 22:39:47,174 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-13 22:39:47,174 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-13 22:39:47,174 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-13 22:39:47,182 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:39:47" (1/1) ... [2024-10-13 22:39:47,183 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:39:47" (1/1) ... [2024-10-13 22:39:47,184 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:39:47" (1/1) ... [2024-10-13 22:39:47,201 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]. [2024-10-13 22:39:47,203 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:39:47" (1/1) ... [2024-10-13 22:39:47,203 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:39:47" (1/1) ... [2024-10-13 22:39:47,206 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:39:47" (1/1) ... [2024-10-13 22:39:47,212 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:39:47" (1/1) ... [2024-10-13 22:39:47,213 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:39:47" (1/1) ... [2024-10-13 22:39:47,214 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:39:47" (1/1) ... [2024-10-13 22:39:47,220 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-13 22:39:47,221 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-13 22:39:47,221 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-13 22:39:47,221 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-13 22:39:47,221 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:39:47" (1/1) ... [2024-10-13 22:39:47,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 22:39:47,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:39:47,244 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) [2024-10-13 22:39:47,246 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 [2024-10-13 22:39:47,278 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-13 22:39:47,278 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-13 22:39:47,278 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2024-10-13 22:39:47,278 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2024-10-13 22:39:47,279 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-13 22:39:47,279 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-13 22:39:47,279 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-10-13 22:39:47,279 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-10-13 22:39:47,335 INFO L238 CfgBuilder]: Building ICFG [2024-10-13 22:39:47,336 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-13 22:39:47,664 INFO L? ?]: Removed 66 outVars from TransFormulas that were not future-live. [2024-10-13 22:39:47,667 INFO L287 CfgBuilder]: Performing block encoding [2024-10-13 22:39:47,698 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-13 22:39:47,699 INFO L314 CfgBuilder]: Removed 2 assume(true) statements. [2024-10-13 22:39:47,699 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:39:47 BoogieIcfgContainer [2024-10-13 22:39:47,699 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-13 22:39:47,701 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-13 22:39:47,701 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-13 22:39:47,703 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-13 22:39:47,703 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 10:39:46" (1/3) ... [2024-10-13 22:39:47,704 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@797a4ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:39:47, skipping insertion in model container [2024-10-13 22:39:47,704 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:39:47" (2/3) ... [2024-10-13 22:39:47,704 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@797a4ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:39:47, skipping insertion in model container [2024-10-13 22:39:47,704 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:39:47" (3/3) ... [2024-10-13 22:39:47,705 INFO L112 eAbstractionObserver]: Analyzing ICFG soft_float_3a.c.cil.c [2024-10-13 22:39:47,716 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-13 22:39:47,717 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-13 22:39:47,761 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-13 22:39:47,766 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;@c1549f5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-13 22:39:47,766 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-13 22:39:47,769 INFO L276 IsEmpty]: Start isEmpty. Operand has 69 states, 60 states have (on average 1.6) internal successors, (96), 62 states have internal predecessors, (96), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-10-13 22:39:47,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-10-13 22:39:47,775 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:39:47,776 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:39:47,776 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:39:47,779 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:39:47,780 INFO L85 PathProgramCache]: Analyzing trace with hash -1468865357, now seen corresponding path program 1 times [2024-10-13 22:39:47,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:39:47,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193018099] [2024-10-13 22:39:47,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:39:47,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:39:47,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:39:47,989 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-13 22:39:47,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:39:47,997 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-13 22:39:47,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:39:48,002 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-10-13 22:39:48,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:39:48,007 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-13 22:39:48,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:39:48,012 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-10-13 22:39:48,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:39:48,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193018099] [2024-10-13 22:39:48,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193018099] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 22:39:48,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 22:39:48,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-13 22:39:48,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468032072] [2024-10-13 22:39:48,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 22:39:48,018 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 22:39:48,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:39:48,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 22:39:48,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 22:39:48,034 INFO L87 Difference]: Start difference. First operand has 69 states, 60 states have (on average 1.6) internal successors, (96), 62 states have internal predecessors, (96), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-13 22:39:48,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:39:48,074 INFO L93 Difference]: Finished difference Result 137 states and 216 transitions. [2024-10-13 22:39:48,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 22:39:48,079 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 35 [2024-10-13 22:39:48,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:39:48,086 INFO L225 Difference]: With dead ends: 137 [2024-10-13 22:39:48,086 INFO L226 Difference]: Without dead ends: 65 [2024-10-13 22:39:48,090 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 22:39:48,092 INFO L432 NwaCegarLoop]: 94 mSDtfsCounter, 0 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 22:39:48,093 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 185 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 22:39:48,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2024-10-13 22:39:48,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2024-10-13 22:39:48,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 58 states have (on average 1.4482758620689655) internal successors, (84), 58 states have internal predecessors, (84), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-10-13 22:39:48,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 93 transitions. [2024-10-13 22:39:48,123 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 93 transitions. Word has length 35 [2024-10-13 22:39:48,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:39:48,124 INFO L471 AbstractCegarLoop]: Abstraction has 65 states and 93 transitions. [2024-10-13 22:39:48,124 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-13 22:39:48,125 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 93 transitions. [2024-10-13 22:39:48,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-10-13 22:39:48,126 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:39:48,127 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:39:48,127 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-13 22:39:48,127 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:39:48,128 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:39:48,128 INFO L85 PathProgramCache]: Analyzing trace with hash -2021311367, now seen corresponding path program 1 times [2024-10-13 22:39:48,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:39:48,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563342143] [2024-10-13 22:39:48,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:39:48,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:39:48,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:39:48,272 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-13 22:39:48,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:39:48,276 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-13 22:39:48,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:39:48,282 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-10-13 22:39:48,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:39:48,289 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-13 22:39:48,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:39:48,295 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-10-13 22:39:48,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:39:48,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563342143] [2024-10-13 22:39:48,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563342143] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 22:39:48,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 22:39:48,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-13 22:39:48,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127146171] [2024-10-13 22:39:48,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 22:39:48,297 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-13 22:39:48,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:39:48,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-13 22:39:48,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-13 22:39:48,299 INFO L87 Difference]: Start difference. First operand 65 states and 93 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-13 22:39:48,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:39:48,322 INFO L93 Difference]: Finished difference Result 75 states and 104 transitions. [2024-10-13 22:39:48,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-13 22:39:48,323 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 37 [2024-10-13 22:39:48,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:39:48,325 INFO L225 Difference]: With dead ends: 75 [2024-10-13 22:39:48,326 INFO L226 Difference]: Without dead ends: 65 [2024-10-13 22:39:48,326 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-13 22:39:48,327 INFO L432 NwaCegarLoop]: 89 mSDtfsCounter, 0 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 22:39:48,327 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 264 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 22:39:48,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2024-10-13 22:39:48,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2024-10-13 22:39:48,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 58 states have (on average 1.4310344827586208) internal successors, (83), 58 states have internal predecessors, (83), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-10-13 22:39:48,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 92 transitions. [2024-10-13 22:39:48,340 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 92 transitions. Word has length 37 [2024-10-13 22:39:48,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:39:48,340 INFO L471 AbstractCegarLoop]: Abstraction has 65 states and 92 transitions. [2024-10-13 22:39:48,341 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-13 22:39:48,342 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 92 transitions. [2024-10-13 22:39:48,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-10-13 22:39:48,343 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:39:48,343 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:39:48,343 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-13 22:39:48,343 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:39:48,343 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:39:48,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1464309303, now seen corresponding path program 1 times [2024-10-13 22:39:48,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:39:48,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713633769] [2024-10-13 22:39:48,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:39:48,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:39:48,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:39:48,446 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-13 22:39:48,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:39:48,449 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-13 22:39:48,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:39:48,495 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-10-13 22:39:48,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:39:48,501 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-13 22:39:48,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:39:48,508 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-13 22:39:48,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:39:48,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713633769] [2024-10-13 22:39:48,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713633769] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:39:48,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389965399] [2024-10-13 22:39:48,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:39:48,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:39:48,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:39:48,513 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 22:39:48,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-13 22:39:48,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:39:48,585 INFO L255 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-13 22:39:48,590 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:39:48,636 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-13 22:39:48,637 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-13 22:39:48,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389965399] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 22:39:48,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-13 22:39:48,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2024-10-13 22:39:48,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065421276] [2024-10-13 22:39:48,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 22:39:48,638 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-13 22:39:48,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:39:48,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-13 22:39:48,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-13 22:39:48,639 INFO L87 Difference]: Start difference. First operand 65 states and 92 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-13 22:39:48,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:39:48,753 INFO L93 Difference]: Finished difference Result 147 states and 213 transitions. [2024-10-13 22:39:48,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-13 22:39:48,754 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 37 [2024-10-13 22:39:48,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:39:48,756 INFO L225 Difference]: With dead ends: 147 [2024-10-13 22:39:48,756 INFO L226 Difference]: Without dead ends: 84 [2024-10-13 22:39:48,756 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-10-13 22:39:48,759 INFO L432 NwaCegarLoop]: 71 mSDtfsCounter, 20 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-13 22:39:48,760 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 199 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-13 22:39:48,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2024-10-13 22:39:48,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 77. [2024-10-13 22:39:48,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 69 states have (on average 1.4202898550724639) internal successors, (98), 69 states have internal predecessors, (98), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-10-13 22:39:48,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 109 transitions. [2024-10-13 22:39:48,772 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 109 transitions. Word has length 37 [2024-10-13 22:39:48,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:39:48,772 INFO L471 AbstractCegarLoop]: Abstraction has 77 states and 109 transitions. [2024-10-13 22:39:48,772 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-13 22:39:48,772 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 109 transitions. [2024-10-13 22:39:48,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-10-13 22:39:48,773 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:39:48,773 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:39:48,789 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-13 22:39:48,974 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:39:48,974 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:39:48,975 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:39:48,975 INFO L85 PathProgramCache]: Analyzing trace with hash 1955471931, now seen corresponding path program 1 times [2024-10-13 22:39:48,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:39:48,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298514120] [2024-10-13 22:39:48,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:39:48,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:39:48,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:39:49,015 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-13 22:39:49,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:39:49,020 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-13 22:39:49,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:39:49,048 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-13 22:39:49,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:39:49,052 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-10-13 22:39:49,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:39:49,057 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-13 22:39:49,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:39:49,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298514120] [2024-10-13 22:39:49,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298514120] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:39:49,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643882516] [2024-10-13 22:39:49,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:39:49,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:39:49,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:39:49,063 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 22:39:49,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-13 22:39:49,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:39:49,122 INFO L255 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-13 22:39:49,124 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:39:49,149 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-13 22:39:49,149 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-13 22:39:49,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643882516] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 22:39:49,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-13 22:39:49,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2024-10-13 22:39:49,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293816545] [2024-10-13 22:39:49,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 22:39:49,150 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-13 22:39:49,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:39:49,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-13 22:39:49,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-10-13 22:39:49,151 INFO L87 Difference]: Start difference. First operand 77 states and 109 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-13 22:39:49,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:39:49,207 INFO L93 Difference]: Finished difference Result 161 states and 231 transitions. [2024-10-13 22:39:49,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-13 22:39:49,207 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 40 [2024-10-13 22:39:49,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:39:49,209 INFO L225 Difference]: With dead ends: 161 [2024-10-13 22:39:49,210 INFO L226 Difference]: Without dead ends: 90 [2024-10-13 22:39:49,211 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-10-13 22:39:49,211 INFO L432 NwaCegarLoop]: 77 mSDtfsCounter, 14 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 22:39:49,213 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 215 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 22:39:49,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2024-10-13 22:39:49,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 81. [2024-10-13 22:39:49,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 72 states have (on average 1.4166666666666667) internal successors, (102), 73 states have internal predecessors, (102), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-10-13 22:39:49,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 115 transitions. [2024-10-13 22:39:49,223 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 115 transitions. Word has length 40 [2024-10-13 22:39:49,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:39:49,224 INFO L471 AbstractCegarLoop]: Abstraction has 81 states and 115 transitions. [2024-10-13 22:39:49,224 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-13 22:39:49,224 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 115 transitions. [2024-10-13 22:39:49,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-10-13 22:39:49,227 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:39:49,227 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:39:49,239 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-13 22:39:49,428 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2024-10-13 22:39:49,428 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:39:49,428 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:39:49,428 INFO L85 PathProgramCache]: Analyzing trace with hash -2063349722, now seen corresponding path program 1 times [2024-10-13 22:39:49,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:39:49,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809391511] [2024-10-13 22:39:49,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:39:49,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:39:49,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:39:49,475 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-13 22:39:49,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:39:49,479 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-13 22:39:49,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:39:49,502 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-10-13 22:39:49,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:39:49,504 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-10-13 22:39:49,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:39:49,507 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-13 22:39:49,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:39:49,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809391511] [2024-10-13 22:39:49,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809391511] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:39:49,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700435988] [2024-10-13 22:39:49,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:39:49,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:39:49,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:39:49,513 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 22:39:49,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-13 22:39:49,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:39:49,567 INFO L255 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-13 22:39:49,568 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:39:49,596 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-13 22:39:49,597 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-13 22:39:49,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700435988] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 22:39:49,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-13 22:39:49,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2024-10-13 22:39:49,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105563938] [2024-10-13 22:39:49,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 22:39:49,598 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-13 22:39:49,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:39:49,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-13 22:39:49,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-10-13 22:39:49,599 INFO L87 Difference]: Start difference. First operand 81 states and 115 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-13 22:39:49,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:39:49,650 INFO L93 Difference]: Finished difference Result 166 states and 239 transitions. [2024-10-13 22:39:49,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-13 22:39:49,651 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 41 [2024-10-13 22:39:49,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:39:49,652 INFO L225 Difference]: With dead ends: 166 [2024-10-13 22:39:49,653 INFO L226 Difference]: Without dead ends: 91 [2024-10-13 22:39:49,653 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-10-13 22:39:49,654 INFO L432 NwaCegarLoop]: 77 mSDtfsCounter, 15 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 22:39:49,654 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 215 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 22:39:49,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2024-10-13 22:39:49,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 82. [2024-10-13 22:39:49,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 73 states have (on average 1.4246575342465753) internal successors, (104), 74 states have internal predecessors, (104), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-10-13 22:39:49,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 117 transitions. [2024-10-13 22:39:49,662 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 117 transitions. Word has length 41 [2024-10-13 22:39:49,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:39:49,663 INFO L471 AbstractCegarLoop]: Abstraction has 82 states and 117 transitions. [2024-10-13 22:39:49,664 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-13 22:39:49,664 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 117 transitions. [2024-10-13 22:39:49,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-10-13 22:39:49,665 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:39:49,665 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:39:49,678 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-10-13 22:39:49,868 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:39:49,868 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:39:49,869 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:39:49,869 INFO L85 PathProgramCache]: Analyzing trace with hash 1431435493, now seen corresponding path program 1 times [2024-10-13 22:39:49,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:39:49,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514258774] [2024-10-13 22:39:49,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:39:49,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:39:49,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:39:49,908 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-13 22:39:49,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:39:49,911 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-13 22:39:49,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:39:49,952 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-13 22:39:49,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:39:49,955 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-10-13 22:39:49,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:39:49,958 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-13 22:39:49,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:39:49,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514258774] [2024-10-13 22:39:49,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514258774] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:39:49,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140062139] [2024-10-13 22:39:49,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:39:49,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:39:49,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:39:49,961 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 22:39:49,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-13 22:39:50,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:39:50,018 INFO L255 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-13 22:39:50,019 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:39:50,058 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-13 22:39:50,058 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:39:50,153 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-13 22:39:50,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140062139] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:39:50,153 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:39:50,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2024-10-13 22:39:50,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765033187] [2024-10-13 22:39:50,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:39:50,154 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-13 22:39:50,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:39:50,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-13 22:39:50,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2024-10-13 22:39:50,156 INFO L87 Difference]: Start difference. First operand 82 states and 117 transitions. Second operand has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 11 states have internal predecessors, (49), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-10-13 22:39:50,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:39:50,251 INFO L93 Difference]: Finished difference Result 213 states and 314 transitions. [2024-10-13 22:39:50,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-13 22:39:50,252 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 11 states have internal predecessors, (49), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 43 [2024-10-13 22:39:50,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:39:50,253 INFO L225 Difference]: With dead ends: 213 [2024-10-13 22:39:50,253 INFO L226 Difference]: Without dead ends: 137 [2024-10-13 22:39:50,253 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2024-10-13 22:39:50,254 INFO L432 NwaCegarLoop]: 78 mSDtfsCounter, 120 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-13 22:39:50,255 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 327 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-13 22:39:50,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2024-10-13 22:39:50,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 96. [2024-10-13 22:39:50,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 87 states have (on average 1.4597701149425288) internal successors, (127), 88 states have internal predecessors, (127), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-10-13 22:39:50,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 140 transitions. [2024-10-13 22:39:50,269 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 140 transitions. Word has length 43 [2024-10-13 22:39:50,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:39:50,269 INFO L471 AbstractCegarLoop]: Abstraction has 96 states and 140 transitions. [2024-10-13 22:39:50,269 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 11 states have internal predecessors, (49), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-10-13 22:39:50,269 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 140 transitions. [2024-10-13 22:39:50,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-10-13 22:39:50,270 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:39:50,270 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 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] [2024-10-13 22:39:50,282 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-10-13 22:39:50,470 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:39:50,470 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:39:50,471 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:39:50,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1122099289, now seen corresponding path program 1 times [2024-10-13 22:39:50,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:39:50,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277688799] [2024-10-13 22:39:50,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:39:50,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:39:50,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:39:50,503 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-13 22:39:50,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:39:50,506 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-13 22:39:50,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:39:50,535 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-13 22:39:50,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:39:50,538 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-10-13 22:39:50,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:39:50,539 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-13 22:39:50,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:39:50,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277688799] [2024-10-13 22:39:50,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277688799] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:39:50,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615614898] [2024-10-13 22:39:50,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:39:50,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:39:50,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:39:50,541 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 22:39:50,542 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-13 22:39:50,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:39:50,595 INFO L255 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-13 22:39:50,596 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:39:50,623 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 19 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-13 22:39:50,623 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:39:50,686 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-13 22:39:50,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615614898] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:39:50,687 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:39:50,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2024-10-13 22:39:50,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33477510] [2024-10-13 22:39:50,687 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:39:50,688 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-13 22:39:50,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:39:50,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-13 22:39:50,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2024-10-13 22:39:50,688 INFO L87 Difference]: Start difference. First operand 96 states and 140 transitions. Second operand has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 11 states have internal predecessors, (52), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-10-13 22:39:50,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:39:50,801 INFO L93 Difference]: Finished difference Result 233 states and 347 transitions. [2024-10-13 22:39:50,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-13 22:39:50,802 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 11 states have internal predecessors, (52), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 44 [2024-10-13 22:39:50,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:39:50,802 INFO L225 Difference]: With dead ends: 233 [2024-10-13 22:39:50,802 INFO L226 Difference]: Without dead ends: 143 [2024-10-13 22:39:50,803 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2024-10-13 22:39:50,803 INFO L432 NwaCegarLoop]: 78 mSDtfsCounter, 98 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-13 22:39:50,803 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 394 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-13 22:39:50,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2024-10-13 22:39:50,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 105. [2024-10-13 22:39:50,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 96 states have (on average 1.4791666666666667) internal successors, (142), 97 states have internal predecessors, (142), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-10-13 22:39:50,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 155 transitions. [2024-10-13 22:39:50,816 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 155 transitions. Word has length 44 [2024-10-13 22:39:50,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:39:50,816 INFO L471 AbstractCegarLoop]: Abstraction has 105 states and 155 transitions. [2024-10-13 22:39:50,816 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 11 states have internal predecessors, (52), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-10-13 22:39:50,816 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 155 transitions. [2024-10-13 22:39:50,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-10-13 22:39:50,817 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:39:50,817 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:39:50,830 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-10-13 22:39:51,017 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:39:51,018 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:39:51,018 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:39:51,018 INFO L85 PathProgramCache]: Analyzing trace with hash -1504596689, now seen corresponding path program 1 times [2024-10-13 22:39:51,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:39:51,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298704102] [2024-10-13 22:39:51,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:39:51,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:39:51,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:39:51,041 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-13 22:39:51,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:39:51,043 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-13 22:39:51,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:39:51,055 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-10-13 22:39:51,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:39:51,057 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-10-13 22:39:51,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:39:51,059 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-10-13 22:39:51,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:39:51,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298704102] [2024-10-13 22:39:51,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298704102] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:39:51,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436402437] [2024-10-13 22:39:51,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:39:51,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:39:51,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:39:51,061 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 22:39:51,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-13 22:39:51,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:39:51,108 INFO L255 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-13 22:39:51,109 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:39:51,123 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-13 22:39:51,124 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-13 22:39:51,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436402437] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 22:39:51,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-13 22:39:51,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 3 [2024-10-13 22:39:51,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625211041] [2024-10-13 22:39:51,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 22:39:51,124 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 22:39:51,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:39:51,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 22:39:51,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 22:39:51,125 INFO L87 Difference]: Start difference. First operand 105 states and 155 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-13 22:39:51,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:39:51,160 INFO L93 Difference]: Finished difference Result 211 states and 319 transitions. [2024-10-13 22:39:51,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 22:39:51,161 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 45 [2024-10-13 22:39:51,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:39:51,162 INFO L225 Difference]: With dead ends: 211 [2024-10-13 22:39:51,162 INFO L226 Difference]: Without dead ends: 112 [2024-10-13 22:39:51,162 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 22:39:51,162 INFO L432 NwaCegarLoop]: 87 mSDtfsCounter, 4 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 22:39:51,163 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 156 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 22:39:51,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2024-10-13 22:39:51,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 107. [2024-10-13 22:39:51,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 98 states have (on average 1.469387755102041) internal successors, (144), 99 states have internal predecessors, (144), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-10-13 22:39:51,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 157 transitions. [2024-10-13 22:39:51,169 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 157 transitions. Word has length 45 [2024-10-13 22:39:51,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:39:51,169 INFO L471 AbstractCegarLoop]: Abstraction has 107 states and 157 transitions. [2024-10-13 22:39:51,170 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-13 22:39:51,170 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 157 transitions. [2024-10-13 22:39:51,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-10-13 22:39:51,170 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:39:51,170 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:39:51,183 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-10-13 22:39:51,371 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:39:51,371 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:39:51,372 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:39:51,372 INFO L85 PathProgramCache]: Analyzing trace with hash 805735315, now seen corresponding path program 1 times [2024-10-13 22:39:51,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:39:51,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326306708] [2024-10-13 22:39:51,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:39:51,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:39:51,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:39:51,391 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-13 22:39:51,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:39:51,393 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-13 22:39:51,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:39:51,405 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-10-13 22:39:51,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:39:51,407 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-10-13 22:39:51,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:39:51,409 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-10-13 22:39:51,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:39:51,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326306708] [2024-10-13 22:39:51,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326306708] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:39:51,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877120751] [2024-10-13 22:39:51,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:39:51,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:39:51,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:39:51,411 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 22:39:51,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-13 22:39:51,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:39:51,466 INFO L255 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-13 22:39:51,468 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:39:51,478 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-13 22:39:51,478 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-13 22:39:51,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877120751] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 22:39:51,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-13 22:39:51,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 3 [2024-10-13 22:39:51,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487298358] [2024-10-13 22:39:51,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 22:39:51,479 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 22:39:51,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:39:51,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 22:39:51,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 22:39:51,479 INFO L87 Difference]: Start difference. First operand 107 states and 157 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-13 22:39:51,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:39:51,518 INFO L93 Difference]: Finished difference Result 209 states and 313 transitions. [2024-10-13 22:39:51,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 22:39:51,518 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 45 [2024-10-13 22:39:51,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:39:51,519 INFO L225 Difference]: With dead ends: 209 [2024-10-13 22:39:51,519 INFO L226 Difference]: Without dead ends: 108 [2024-10-13 22:39:51,519 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 22:39:51,520 INFO L432 NwaCegarLoop]: 85 mSDtfsCounter, 7 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 22:39:51,520 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 155 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 22:39:51,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2024-10-13 22:39:51,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 103. [2024-10-13 22:39:51,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 94 states have (on average 1.446808510638298) internal successors, (136), 95 states have internal predecessors, (136), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-10-13 22:39:51,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 149 transitions. [2024-10-13 22:39:51,529 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 149 transitions. Word has length 45 [2024-10-13 22:39:51,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:39:51,529 INFO L471 AbstractCegarLoop]: Abstraction has 103 states and 149 transitions. [2024-10-13 22:39:51,530 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-13 22:39:51,530 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 149 transitions. [2024-10-13 22:39:51,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-10-13 22:39:51,531 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:39:51,531 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:39:51,544 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-13 22:39:51,731 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:39:51,732 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:39:51,733 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:39:51,733 INFO L85 PathProgramCache]: Analyzing trace with hash -1725921874, now seen corresponding path program 1 times [2024-10-13 22:39:51,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:39:51,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082196199] [2024-10-13 22:39:51,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:39:51,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:39:51,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:39:51,785 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-13 22:39:51,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:39:51,788 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-13 22:39:51,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:39:51,839 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-10-13 22:39:51,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:39:51,841 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-10-13 22:39:51,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:39:51,843 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-13 22:39:51,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:39:51,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082196199] [2024-10-13 22:39:51,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082196199] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:39:51,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832253013] [2024-10-13 22:39:51,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:39:51,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:39:51,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:39:51,845 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 22:39:51,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-13 22:39:51,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:39:51,896 INFO L255 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-13 22:39:51,897 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:39:51,929 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-10-13 22:39:51,930 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:39:52,003 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-10-13 22:39:52,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832253013] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:39:52,003 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:39:52,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 13 [2024-10-13 22:39:52,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93915755] [2024-10-13 22:39:52,003 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:39:52,004 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-13 22:39:52,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:39:52,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-13 22:39:52,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2024-10-13 22:39:52,004 INFO L87 Difference]: Start difference. First operand 103 states and 149 transitions. Second operand has 13 states, 11 states have (on average 6.0) internal successors, (66), 11 states have internal predecessors, (66), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) [2024-10-13 22:39:52,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:39:52,186 INFO L93 Difference]: Finished difference Result 250 states and 372 transitions. [2024-10-13 22:39:52,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-13 22:39:52,188 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 6.0) internal successors, (66), 11 states have internal predecessors, (66), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) Word has length 46 [2024-10-13 22:39:52,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:39:52,189 INFO L225 Difference]: With dead ends: 250 [2024-10-13 22:39:52,189 INFO L226 Difference]: Without dead ends: 153 [2024-10-13 22:39:52,190 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2024-10-13 22:39:52,190 INFO L432 NwaCegarLoop]: 70 mSDtfsCounter, 100 mSDsluCounter, 469 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 539 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-13 22:39:52,190 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 539 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-13 22:39:52,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2024-10-13 22:39:52,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 130. [2024-10-13 22:39:52,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 118 states have (on average 1.4067796610169492) internal successors, (166), 120 states have internal predecessors, (166), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (18), 6 states have call predecessors, (18), 5 states have call successors, (18) [2024-10-13 22:39:52,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 190 transitions. [2024-10-13 22:39:52,203 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 190 transitions. Word has length 46 [2024-10-13 22:39:52,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:39:52,203 INFO L471 AbstractCegarLoop]: Abstraction has 130 states and 190 transitions. [2024-10-13 22:39:52,204 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 6.0) internal successors, (66), 11 states have internal predecessors, (66), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) [2024-10-13 22:39:52,204 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 190 transitions. [2024-10-13 22:39:52,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-10-13 22:39:52,204 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:39:52,204 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:39:52,217 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-10-13 22:39:52,405 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-10-13 22:39:52,406 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:39:52,406 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:39:52,406 INFO L85 PathProgramCache]: Analyzing trace with hash -1721146227, now seen corresponding path program 1 times [2024-10-13 22:39:52,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:39:52,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512966883] [2024-10-13 22:39:52,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:39:52,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:39:52,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:39:52,437 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-13 22:39:52,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:39:52,438 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-13 22:39:52,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:39:52,484 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-10-13 22:39:52,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:39:52,487 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-10-13 22:39:52,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:39:52,491 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-10-13 22:39:52,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:39:52,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512966883] [2024-10-13 22:39:52,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512966883] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:39:52,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342206970] [2024-10-13 22:39:52,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:39:52,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:39:52,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:39:52,496 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 22:39:52,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-13 22:39:52,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:39:52,548 INFO L255 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-13 22:39:52,550 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:39:52,583 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-13 22:39:52,584 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-13 22:39:52,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342206970] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 22:39:52,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-13 22:39:52,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2024-10-13 22:39:52,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596537311] [2024-10-13 22:39:52,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 22:39:52,585 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 22:39:52,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:39:52,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 22:39:52,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-13 22:39:52,585 INFO L87 Difference]: Start difference. First operand 130 states and 190 transitions. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-13 22:39:52,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:39:52,621 INFO L93 Difference]: Finished difference Result 256 states and 379 transitions. [2024-10-13 22:39:52,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 22:39:52,621 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 48 [2024-10-13 22:39:52,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:39:52,622 INFO L225 Difference]: With dead ends: 256 [2024-10-13 22:39:52,622 INFO L226 Difference]: Without dead ends: 132 [2024-10-13 22:39:52,622 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-13 22:39:52,623 INFO L432 NwaCegarLoop]: 91 mSDtfsCounter, 5 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 22:39:52,623 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 162 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 22:39:52,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2024-10-13 22:39:52,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 130. [2024-10-13 22:39:52,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 118 states have (on average 1.3983050847457628) internal successors, (165), 120 states have internal predecessors, (165), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (18), 6 states have call predecessors, (18), 5 states have call successors, (18) [2024-10-13 22:39:52,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 189 transitions. [2024-10-13 22:39:52,630 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 189 transitions. Word has length 48 [2024-10-13 22:39:52,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:39:52,630 INFO L471 AbstractCegarLoop]: Abstraction has 130 states and 189 transitions. [2024-10-13 22:39:52,630 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-13 22:39:52,630 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 189 transitions. [2024-10-13 22:39:52,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-10-13 22:39:52,631 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:39:52,631 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:39:52,645 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-10-13 22:39:52,831 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:39:52,832 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:39:52,832 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:39:52,832 INFO L85 PathProgramCache]: Analyzing trace with hash -283089764, now seen corresponding path program 1 times [2024-10-13 22:39:52,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:39:52,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797760418] [2024-10-13 22:39:52,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:39:52,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:39:52,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:39:52,949 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-13 22:39:52,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:39:52,951 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-13 22:39:52,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:39:52,957 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-10-13 22:39:52,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:39:52,986 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-10-13 22:39:52,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:39:53,000 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-13 22:39:53,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:39:53,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797760418] [2024-10-13 22:39:53,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797760418] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 22:39:53,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 22:39:53,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-10-13 22:39:53,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897854301] [2024-10-13 22:39:53,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 22:39:53,001 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-13 22:39:53,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:39:53,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-13 22:39:53,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-10-13 22:39:53,002 INFO L87 Difference]: Start difference. First operand 130 states and 189 transitions. Second operand has 8 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 states have internal predecessors, (34), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-13 22:39:53,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:39:53,061 INFO L93 Difference]: Finished difference Result 170 states and 244 transitions. [2024-10-13 22:39:53,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-13 22:39:53,063 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 states have internal predecessors, (34), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 49 [2024-10-13 22:39:53,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:39:53,063 INFO L225 Difference]: With dead ends: 170 [2024-10-13 22:39:53,064 INFO L226 Difference]: Without dead ends: 134 [2024-10-13 22:39:53,064 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-10-13 22:39:53,064 INFO L432 NwaCegarLoop]: 82 mSDtfsCounter, 48 mSDsluCounter, 442 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 524 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 22:39:53,064 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 524 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 22:39:53,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2024-10-13 22:39:53,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 133. [2024-10-13 22:39:53,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 121 states have (on average 1.3884297520661157) internal successors, (168), 122 states have internal predecessors, (168), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (18), 7 states have call predecessors, (18), 5 states have call successors, (18) [2024-10-13 22:39:53,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 192 transitions. [2024-10-13 22:39:53,073 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 192 transitions. Word has length 49 [2024-10-13 22:39:53,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:39:53,073 INFO L471 AbstractCegarLoop]: Abstraction has 133 states and 192 transitions. [2024-10-13 22:39:53,074 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 states have internal predecessors, (34), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-13 22:39:53,074 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 192 transitions. [2024-10-13 22:39:53,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-10-13 22:39:53,074 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:39:53,074 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:39:53,075 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-10-13 22:39:53,075 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:39:53,075 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:39:53,075 INFO L85 PathProgramCache]: Analyzing trace with hash -1294207014, now seen corresponding path program 1 times [2024-10-13 22:39:53,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:39:53,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784038531] [2024-10-13 22:39:53,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:39:53,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:39:53,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:39:53,201 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-13 22:39:53,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:39:53,205 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-13 22:39:53,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:39:53,209 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-10-13 22:39:53,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:39:53,229 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-10-13 22:39:53,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:39:53,232 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-10-13 22:39:53,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:39:53,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784038531] [2024-10-13 22:39:53,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784038531] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:39:53,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622639851] [2024-10-13 22:39:53,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:39:53,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:39:53,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:39:53,234 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 22:39:53,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-13 22:39:53,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:39:53,284 INFO L255 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-13 22:39:53,285 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:39:53,309 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-10-13 22:39:53,309 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:39:53,353 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-10-13 22:39:53,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622639851] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-13 22:39:53,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-10-13 22:39:53,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8, 8] total 10 [2024-10-13 22:39:53,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728647429] [2024-10-13 22:39:53,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 22:39:53,354 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-13 22:39:53,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:39:53,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-13 22:39:53,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-10-13 22:39:53,355 INFO L87 Difference]: Start difference. First operand 133 states and 192 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-13 22:39:53,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:39:53,382 INFO L93 Difference]: Finished difference Result 152 states and 212 transitions. [2024-10-13 22:39:53,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-13 22:39:53,382 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 49 [2024-10-13 22:39:53,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:39:53,383 INFO L225 Difference]: With dead ends: 152 [2024-10-13 22:39:53,383 INFO L226 Difference]: Without dead ends: 146 [2024-10-13 22:39:53,383 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-10-13 22:39:53,384 INFO L432 NwaCegarLoop]: 85 mSDtfsCounter, 0 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 22:39:53,384 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 243 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 22:39:53,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2024-10-13 22:39:53,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2024-10-13 22:39:53,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 134 states have (on average 1.3582089552238805) internal successors, (182), 135 states have internal predecessors, (182), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (18), 7 states have call predecessors, (18), 5 states have call successors, (18) [2024-10-13 22:39:53,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 206 transitions. [2024-10-13 22:39:53,390 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 206 transitions. Word has length 49 [2024-10-13 22:39:53,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:39:53,391 INFO L471 AbstractCegarLoop]: Abstraction has 146 states and 206 transitions. [2024-10-13 22:39:53,391 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-13 22:39:53,391 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 206 transitions. [2024-10-13 22:39:53,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-10-13 22:39:53,392 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:39:53,392 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:39:53,404 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-10-13 22:39:53,595 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-10-13 22:39:53,596 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:39:53,597 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:39:53,597 INFO L85 PathProgramCache]: Analyzing trace with hash -1236948712, now seen corresponding path program 1 times [2024-10-13 22:39:53,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:39:53,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171844994] [2024-10-13 22:39:53,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:39:53,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:39:53,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:39:53,675 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-13 22:39:53,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:39:53,677 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-13 22:39:53,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:39:53,681 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-10-13 22:39:53,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:39:53,683 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-10-13 22:39:53,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:39:53,684 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-10-13 22:39:53,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:39:53,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171844994] [2024-10-13 22:39:53,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171844994] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 22:39:53,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 22:39:53,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-13 22:39:53,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192335875] [2024-10-13 22:39:53,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 22:39:53,685 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-13 22:39:53,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:39:53,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-13 22:39:53,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-10-13 22:39:53,686 INFO L87 Difference]: Start difference. First operand 146 states and 206 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-13 22:39:53,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:39:53,715 INFO L93 Difference]: Finished difference Result 152 states and 211 transitions. [2024-10-13 22:39:53,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-13 22:39:53,715 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 49 [2024-10-13 22:39:53,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:39:53,716 INFO L225 Difference]: With dead ends: 152 [2024-10-13 22:39:53,716 INFO L226 Difference]: Without dead ends: 136 [2024-10-13 22:39:53,717 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-10-13 22:39:53,717 INFO L432 NwaCegarLoop]: 86 mSDtfsCounter, 1 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 22:39:53,717 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 425 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 22:39:53,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2024-10-13 22:39:53,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2024-10-13 22:39:53,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 124 states have (on average 1.3548387096774193) internal successors, (168), 126 states have internal predecessors, (168), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2024-10-13 22:39:53,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 189 transitions. [2024-10-13 22:39:53,723 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 189 transitions. Word has length 49 [2024-10-13 22:39:53,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:39:53,724 INFO L471 AbstractCegarLoop]: Abstraction has 136 states and 189 transitions. [2024-10-13 22:39:53,724 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-13 22:39:53,724 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 189 transitions. [2024-10-13 22:39:53,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-10-13 22:39:53,724 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:39:53,724 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 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] [2024-10-13 22:39:53,724 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-10-13 22:39:53,725 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:39:53,725 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:39:53,725 INFO L85 PathProgramCache]: Analyzing trace with hash 1163058693, now seen corresponding path program 1 times [2024-10-13 22:39:53,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:39:53,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399334520] [2024-10-13 22:39:53,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:39:53,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:39:53,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:39:53,822 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-13 22:39:53,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:39:53,825 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-13 22:39:53,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:39:53,829 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-10-13 22:39:53,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:39:53,847 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-10-13 22:39:53,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:39:53,850 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-10-13 22:39:53,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:39:53,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399334520] [2024-10-13 22:39:53,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399334520] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:39:53,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437683171] [2024-10-13 22:39:53,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:39:53,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:39:53,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:39:53,852 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 22:39:53,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-13 22:39:53,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:39:53,906 INFO L255 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-10-13 22:39:53,907 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:39:53,929 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-10-13 22:39:53,929 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:39:53,999 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-10-13 22:39:54,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437683171] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-13 22:39:54,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-10-13 22:39:54,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 12 [2024-10-13 22:39:54,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724573349] [2024-10-13 22:39:54,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 22:39:54,000 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-13 22:39:54,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:39:54,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-13 22:39:54,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-10-13 22:39:54,001 INFO L87 Difference]: Start difference. First operand 136 states and 189 transitions. Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-13 22:39:54,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:39:54,045 INFO L93 Difference]: Finished difference Result 150 states and 203 transitions. [2024-10-13 22:39:54,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-13 22:39:54,045 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 51 [2024-10-13 22:39:54,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:39:54,046 INFO L225 Difference]: With dead ends: 150 [2024-10-13 22:39:54,047 INFO L226 Difference]: Without dead ends: 139 [2024-10-13 22:39:54,047 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-10-13 22:39:54,047 INFO L432 NwaCegarLoop]: 86 mSDtfsCounter, 7 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 22:39:54,048 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 240 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 22:39:54,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2024-10-13 22:39:54,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 137. [2024-10-13 22:39:54,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 125 states have (on average 1.352) internal successors, (169), 127 states have internal predecessors, (169), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2024-10-13 22:39:54,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 190 transitions. [2024-10-13 22:39:54,058 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 190 transitions. Word has length 51 [2024-10-13 22:39:54,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:39:54,058 INFO L471 AbstractCegarLoop]: Abstraction has 137 states and 190 transitions. [2024-10-13 22:39:54,058 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-13 22:39:54,058 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 190 transitions. [2024-10-13 22:39:54,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-10-13 22:39:54,059 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:39:54,059 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 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] [2024-10-13 22:39:54,071 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-10-13 22:39:54,259 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-10-13 22:39:54,259 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:39:54,260 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:39:54,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1421224131, now seen corresponding path program 1 times [2024-10-13 22:39:54,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:39:54,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98496529] [2024-10-13 22:39:54,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:39:54,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:39:54,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:39:54,310 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-13 22:39:54,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:39:54,312 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-13 22:39:54,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:39:54,354 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-10-13 22:39:54,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:39:54,357 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-10-13 22:39:54,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:39:54,358 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-13 22:39:54,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:39:54,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98496529] [2024-10-13 22:39:54,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98496529] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:39:54,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681861413] [2024-10-13 22:39:54,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:39:54,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:39:54,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:39:54,361 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 22:39:54,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-13 22:39:54,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:39:54,412 INFO L255 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-10-13 22:39:54,413 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:39:54,550 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-10-13 22:39:54,550 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:39:54,870 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-10-13 22:39:54,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681861413] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:39:54,871 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:39:54,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 13, 14] total 28 [2024-10-13 22:39:54,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173325481] [2024-10-13 22:39:54,871 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:39:54,871 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-10-13 22:39:54,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:39:54,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-10-13 22:39:54,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=683, Unknown=0, NotChecked=0, Total=756 [2024-10-13 22:39:54,872 INFO L87 Difference]: Start difference. First operand 137 states and 190 transitions. Second operand has 28 states, 24 states have (on average 3.4166666666666665) internal successors, (82), 24 states have internal predecessors, (82), 4 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (10), 8 states have call predecessors, (10), 4 states have call successors, (10) [2024-10-13 22:39:56,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:39:56,297 INFO L93 Difference]: Finished difference Result 439 states and 661 transitions. [2024-10-13 22:39:56,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2024-10-13 22:39:56,297 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 24 states have (on average 3.4166666666666665) internal successors, (82), 24 states have internal predecessors, (82), 4 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (10), 8 states have call predecessors, (10), 4 states have call successors, (10) Word has length 51 [2024-10-13 22:39:56,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:39:56,299 INFO L225 Difference]: With dead ends: 439 [2024-10-13 22:39:56,299 INFO L226 Difference]: Without dead ends: 276 [2024-10-13 22:39:56,300 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=406, Invalid=3134, Unknown=0, NotChecked=0, Total=3540 [2024-10-13 22:39:56,301 INFO L432 NwaCegarLoop]: 139 mSDtfsCounter, 211 mSDsluCounter, 3008 mSDsCounter, 0 mSdLazyCounter, 1445 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 3147 SdHoareTripleChecker+Invalid, 1505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-10-13 22:39:56,301 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 3147 Invalid, 1505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1445 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-10-13 22:39:56,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2024-10-13 22:39:56,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 150. [2024-10-13 22:39:56,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 135 states have (on average 1.3407407407407408) internal successors, (181), 138 states have internal predecessors, (181), 8 states have call successors, (8), 3 states have call predecessors, (8), 6 states have return successors, (28), 8 states have call predecessors, (28), 7 states have call successors, (28) [2024-10-13 22:39:56,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 217 transitions. [2024-10-13 22:39:56,320 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 217 transitions. Word has length 51 [2024-10-13 22:39:56,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:39:56,320 INFO L471 AbstractCegarLoop]: Abstraction has 150 states and 217 transitions. [2024-10-13 22:39:56,320 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 24 states have (on average 3.4166666666666665) internal successors, (82), 24 states have internal predecessors, (82), 4 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (10), 8 states have call predecessors, (10), 4 states have call successors, (10) [2024-10-13 22:39:56,320 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 217 transitions. [2024-10-13 22:39:56,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-10-13 22:39:56,321 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:39:56,321 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 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] [2024-10-13 22:39:56,334 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-10-13 22:39:56,525 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-10-13 22:39:56,525 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:39:56,526 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:39:56,526 INFO L85 PathProgramCache]: Analyzing trace with hash 644594984, now seen corresponding path program 1 times [2024-10-13 22:39:56,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:39:56,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377158913] [2024-10-13 22:39:56,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:39:56,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:39:56,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:39:56,564 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-13 22:39:56,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:39:56,566 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-13 22:39:56,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:39:56,623 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-10-13 22:39:56,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:39:56,626 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-10-13 22:39:56,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:39:56,627 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 3 proven. 33 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-13 22:39:56,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:39:56,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377158913] [2024-10-13 22:39:56,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377158913] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:39:56,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106865887] [2024-10-13 22:39:56,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:39:56,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:39:56,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:39:56,629 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 22:39:56,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-10-13 22:39:56,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:39:56,678 INFO L255 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-13 22:39:56,679 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:39:56,731 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 20 proven. 26 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-13 22:39:56,731 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:39:56,855 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 3 proven. 33 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-13 22:39:56,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106865887] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:39:56,855 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:39:56,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2024-10-13 22:39:56,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705085143] [2024-10-13 22:39:56,856 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:39:56,856 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-13 22:39:56,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:39:56,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-13 22:39:56,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=244, Unknown=0, NotChecked=0, Total=380 [2024-10-13 22:39:56,857 INFO L87 Difference]: Start difference. First operand 150 states and 217 transitions. Second operand has 20 states, 20 states have (on average 4.3) internal successors, (86), 20 states have internal predecessors, (86), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-10-13 22:39:57,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:39:57,004 INFO L93 Difference]: Finished difference Result 379 states and 541 transitions. [2024-10-13 22:39:57,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-13 22:39:57,005 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.3) internal successors, (86), 20 states have internal predecessors, (86), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 56 [2024-10-13 22:39:57,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:39:57,006 INFO L225 Difference]: With dead ends: 379 [2024-10-13 22:39:57,006 INFO L226 Difference]: Without dead ends: 239 [2024-10-13 22:39:57,007 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=267, Unknown=0, NotChecked=0, Total=420 [2024-10-13 22:39:57,007 INFO L432 NwaCegarLoop]: 76 mSDtfsCounter, 185 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 538 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-13 22:39:57,007 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 538 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-13 22:39:57,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2024-10-13 22:39:57,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 168. [2024-10-13 22:39:57,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 153 states have (on average 1.3790849673202614) internal successors, (211), 156 states have internal predecessors, (211), 8 states have call successors, (8), 3 states have call predecessors, (8), 6 states have return successors, (28), 8 states have call predecessors, (28), 7 states have call successors, (28) [2024-10-13 22:39:57,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 247 transitions. [2024-10-13 22:39:57,016 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 247 transitions. Word has length 56 [2024-10-13 22:39:57,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:39:57,016 INFO L471 AbstractCegarLoop]: Abstraction has 168 states and 247 transitions. [2024-10-13 22:39:57,016 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.3) internal successors, (86), 20 states have internal predecessors, (86), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-10-13 22:39:57,016 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 247 transitions. [2024-10-13 22:39:57,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-10-13 22:39:57,017 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:39:57,017 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 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] [2024-10-13 22:39:57,029 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-10-13 22:39:57,221 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-10-13 22:39:57,222 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:39:57,222 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:39:57,222 INFO L85 PathProgramCache]: Analyzing trace with hash -546822584, now seen corresponding path program 1 times [2024-10-13 22:39:57,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:39:57,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139457674] [2024-10-13 22:39:57,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:39:57,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:39:57,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:39:57,286 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-13 22:39:57,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:39:57,288 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-13 22:39:57,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:39:57,292 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-10-13 22:39:57,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:39:57,293 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-10-13 22:39:57,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:39:57,310 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-10-13 22:39:57,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:39:57,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139457674] [2024-10-13 22:39:57,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139457674] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 22:39:57,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 22:39:57,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-13 22:39:57,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685698666] [2024-10-13 22:39:57,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 22:39:57,311 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-13 22:39:57,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:39:57,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-13 22:39:57,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-10-13 22:39:57,311 INFO L87 Difference]: Start difference. First operand 168 states and 247 transitions. Second operand has 6 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-13 22:39:57,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:39:57,352 INFO L93 Difference]: Finished difference Result 195 states and 282 transitions. [2024-10-13 22:39:57,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-13 22:39:57,352 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 58 [2024-10-13 22:39:57,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:39:57,353 INFO L225 Difference]: With dead ends: 195 [2024-10-13 22:39:57,353 INFO L226 Difference]: Without dead ends: 184 [2024-10-13 22:39:57,353 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-10-13 22:39:57,354 INFO L432 NwaCegarLoop]: 89 mSDtfsCounter, 5 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 22:39:57,354 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 431 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 22:39:57,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2024-10-13 22:39:57,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 172. [2024-10-13 22:39:57,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 156 states have (on average 1.3782051282051282) internal successors, (215), 159 states have internal predecessors, (215), 8 states have call successors, (8), 3 states have call predecessors, (8), 7 states have return successors, (33), 9 states have call predecessors, (33), 7 states have call successors, (33) [2024-10-13 22:39:57,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 256 transitions. [2024-10-13 22:39:57,363 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 256 transitions. Word has length 58 [2024-10-13 22:39:57,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:39:57,363 INFO L471 AbstractCegarLoop]: Abstraction has 172 states and 256 transitions. [2024-10-13 22:39:57,363 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-13 22:39:57,363 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 256 transitions. [2024-10-13 22:39:57,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-10-13 22:39:57,364 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:39:57,364 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 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] [2024-10-13 22:39:57,364 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-10-13 22:39:57,365 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:39:57,365 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:39:57,365 INFO L85 PathProgramCache]: Analyzing trace with hash -942318695, now seen corresponding path program 2 times [2024-10-13 22:39:57,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:39:57,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183915919] [2024-10-13 22:39:57,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:39:57,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:39:57,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:39:57,442 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-13 22:39:57,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:39:57,444 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-13 22:39:57,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:39:57,577 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-10-13 22:39:57,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:39:57,581 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-10-13 22:39:57,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:39:57,583 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 3 proven. 25 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-13 22:39:57,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:39:57,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183915919] [2024-10-13 22:39:57,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183915919] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:39:57,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981584997] [2024-10-13 22:39:57,583 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-13 22:39:57,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:39:57,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:39:57,585 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 22:39:57,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-10-13 22:39:57,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-13 22:39:57,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 22:39:57,645 INFO L255 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-10-13 22:39:57,647 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:39:57,879 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 7 proven. 25 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-10-13 22:39:57,879 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:39:58,375 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 3 proven. 25 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-13 22:39:58,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981584997] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:39:58,375 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:39:58,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 17, 16] total 37 [2024-10-13 22:39:58,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720677353] [2024-10-13 22:39:58,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:39:58,376 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-10-13 22:39:58,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:39:58,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-10-13 22:39:58,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1206, Unknown=0, NotChecked=0, Total=1332 [2024-10-13 22:39:58,379 INFO L87 Difference]: Start difference. First operand 172 states and 256 transitions. Second operand has 37 states, 34 states have (on average 3.1470588235294117) internal successors, (107), 33 states have internal predecessors, (107), 4 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (10), 8 states have call predecessors, (10), 4 states have call successors, (10) [2024-10-13 22:40:00,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:40:00,843 INFO L93 Difference]: Finished difference Result 559 states and 899 transitions. [2024-10-13 22:40:00,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2024-10-13 22:40:00,844 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 34 states have (on average 3.1470588235294117) internal successors, (107), 33 states have internal predecessors, (107), 4 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (10), 8 states have call predecessors, (10), 4 states have call successors, (10) Word has length 60 [2024-10-13 22:40:00,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:40:00,846 INFO L225 Difference]: With dead ends: 559 [2024-10-13 22:40:00,846 INFO L226 Difference]: Without dead ends: 390 [2024-10-13 22:40:00,848 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1938 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1089, Invalid=6921, Unknown=0, NotChecked=0, Total=8010 [2024-10-13 22:40:00,849 INFO L432 NwaCegarLoop]: 114 mSDtfsCounter, 562 mSDsluCounter, 2253 mSDsCounter, 0 mSdLazyCounter, 2081 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 574 SdHoareTripleChecker+Valid, 2367 SdHoareTripleChecker+Invalid, 2246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 2081 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-10-13 22:40:00,849 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [574 Valid, 2367 Invalid, 2246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 2081 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-10-13 22:40:00,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2024-10-13 22:40:00,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 179. [2024-10-13 22:40:00,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 160 states have (on average 1.36875) internal successors, (219), 164 states have internal predecessors, (219), 10 states have call successors, (10), 3 states have call predecessors, (10), 8 states have return successors, (55), 11 states have call predecessors, (55), 9 states have call successors, (55) [2024-10-13 22:40:00,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 284 transitions. [2024-10-13 22:40:00,864 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 284 transitions. Word has length 60 [2024-10-13 22:40:00,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:40:00,864 INFO L471 AbstractCegarLoop]: Abstraction has 179 states and 284 transitions. [2024-10-13 22:40:00,864 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 34 states have (on average 3.1470588235294117) internal successors, (107), 33 states have internal predecessors, (107), 4 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (10), 8 states have call predecessors, (10), 4 states have call successors, (10) [2024-10-13 22:40:00,864 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 284 transitions. [2024-10-13 22:40:00,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-10-13 22:40:00,865 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:40:00,865 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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] [2024-10-13 22:40:00,877 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-10-13 22:40:01,065 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:40:01,066 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:40:01,066 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:40:01,066 INFO L85 PathProgramCache]: Analyzing trace with hash 2127673157, now seen corresponding path program 1 times [2024-10-13 22:40:01,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:40:01,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426580149] [2024-10-13 22:40:01,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:40:01,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:40:01,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:40:01,134 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-13 22:40:01,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:40:01,136 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-13 22:40:01,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:40:01,142 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-10-13 22:40:01,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:40:01,143 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-10-13 22:40:01,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:40:01,156 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2024-10-13 22:40:01,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:40:01,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426580149] [2024-10-13 22:40:01,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426580149] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 22:40:01,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 22:40:01,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-13 22:40:01,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859083205] [2024-10-13 22:40:01,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 22:40:01,158 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-13 22:40:01,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:40:01,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-13 22:40:01,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-10-13 22:40:01,158 INFO L87 Difference]: Start difference. First operand 179 states and 284 transitions. Second operand has 6 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-13 22:40:01,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:40:01,193 INFO L93 Difference]: Finished difference Result 227 states and 346 transitions. [2024-10-13 22:40:01,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-13 22:40:01,193 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 68 [2024-10-13 22:40:01,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:40:01,194 INFO L225 Difference]: With dead ends: 227 [2024-10-13 22:40:01,194 INFO L226 Difference]: Without dead ends: 182 [2024-10-13 22:40:01,195 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-10-13 22:40:01,195 INFO L432 NwaCegarLoop]: 88 mSDtfsCounter, 1 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 22:40:01,195 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 428 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 22:40:01,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2024-10-13 22:40:01,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 175. [2024-10-13 22:40:01,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 159 states have (on average 1.371069182389937) internal successors, (218), 161 states have internal predecessors, (218), 8 states have call successors, (8), 3 states have call predecessors, (8), 7 states have return successors, (33), 10 states have call predecessors, (33), 7 states have call successors, (33) [2024-10-13 22:40:01,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 259 transitions. [2024-10-13 22:40:01,205 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 259 transitions. Word has length 68 [2024-10-13 22:40:01,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:40:01,205 INFO L471 AbstractCegarLoop]: Abstraction has 175 states and 259 transitions. [2024-10-13 22:40:01,206 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-13 22:40:01,206 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 259 transitions. [2024-10-13 22:40:01,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-10-13 22:40:01,206 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:40:01,206 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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] [2024-10-13 22:40:01,206 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-10-13 22:40:01,207 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:40:01,207 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:40:01,207 INFO L85 PathProgramCache]: Analyzing trace with hash -1573646453, now seen corresponding path program 1 times [2024-10-13 22:40:01,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:40:01,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079229974] [2024-10-13 22:40:01,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:40:01,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:40:01,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:40:01,304 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-13 22:40:01,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:40:01,306 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-13 22:40:01,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:40:01,311 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-10-13 22:40:01,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:40:01,337 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-10-13 22:40:01,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:40:01,340 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2024-10-13 22:40:01,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:40:01,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079229974] [2024-10-13 22:40:01,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079229974] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:40:01,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651083007] [2024-10-13 22:40:01,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:40:01,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:40:01,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:40:01,342 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 22:40:01,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-10-13 22:40:01,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:40:01,400 INFO L255 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-10-13 22:40:01,402 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:40:01,812 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-10-13 22:40:01,813 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:40:02,046 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-10-13 22:40:02,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651083007] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:40:02,046 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:40:02,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 12] total 27 [2024-10-13 22:40:02,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664144020] [2024-10-13 22:40:02,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:40:02,046 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-10-13 22:40:02,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:40:02,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-10-13 22:40:02,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=631, Unknown=0, NotChecked=0, Total=702 [2024-10-13 22:40:02,047 INFO L87 Difference]: Start difference. First operand 175 states and 259 transitions. Second operand has 27 states, 22 states have (on average 3.6363636363636362) internal successors, (80), 22 states have internal predecessors, (80), 5 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (10), 9 states have call predecessors, (10), 4 states have call successors, (10) [2024-10-13 22:40:02,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:40:02,488 INFO L93 Difference]: Finished difference Result 363 states and 563 transitions. [2024-10-13 22:40:02,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-10-13 22:40:02,488 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 22 states have (on average 3.6363636363636362) internal successors, (80), 22 states have internal predecessors, (80), 5 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (10), 9 states have call predecessors, (10), 4 states have call successors, (10) Word has length 70 [2024-10-13 22:40:02,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:40:02,490 INFO L225 Difference]: With dead ends: 363 [2024-10-13 22:40:02,490 INFO L226 Difference]: Without dead ends: 260 [2024-10-13 22:40:02,490 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=148, Invalid=1184, Unknown=0, NotChecked=0, Total=1332 [2024-10-13 22:40:02,491 INFO L432 NwaCegarLoop]: 85 mSDtfsCounter, 213 mSDsluCounter, 1587 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 1672 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-13 22:40:02,491 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [216 Valid, 1672 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 373 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-13 22:40:02,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2024-10-13 22:40:02,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 191. [2024-10-13 22:40:02,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 168 states have (on average 1.3452380952380953) internal successors, (226), 172 states have internal predecessors, (226), 13 states have call successors, (13), 3 states have call predecessors, (13), 9 states have return successors, (81), 15 states have call predecessors, (81), 12 states have call successors, (81) [2024-10-13 22:40:02,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 320 transitions. [2024-10-13 22:40:02,507 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 320 transitions. Word has length 70 [2024-10-13 22:40:02,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:40:02,507 INFO L471 AbstractCegarLoop]: Abstraction has 191 states and 320 transitions. [2024-10-13 22:40:02,507 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 22 states have (on average 3.6363636363636362) internal successors, (80), 22 states have internal predecessors, (80), 5 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (10), 9 states have call predecessors, (10), 4 states have call successors, (10) [2024-10-13 22:40:02,507 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 320 transitions. [2024-10-13 22:40:02,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-10-13 22:40:02,508 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:40:02,508 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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] [2024-10-13 22:40:02,524 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-10-13 22:40:02,712 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:40:02,713 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:40:02,713 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:40:02,713 INFO L85 PathProgramCache]: Analyzing trace with hash 317035896, now seen corresponding path program 1 times [2024-10-13 22:40:02,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:40:02,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036551795] [2024-10-13 22:40:02,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:40:02,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:40:02,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:40:02,779 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-13 22:40:02,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:40:02,781 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-13 22:40:02,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:40:02,872 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-10-13 22:40:02,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:40:02,874 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-10-13 22:40:02,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:40:02,876 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 3 proven. 37 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-13 22:40:02,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:40:02,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036551795] [2024-10-13 22:40:02,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036551795] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:40:02,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41786975] [2024-10-13 22:40:02,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:40:02,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:40:02,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:40:02,878 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 22:40:02,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-10-13 22:40:02,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:40:02,949 INFO L255 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-10-13 22:40:02,951 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:40:03,032 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 30 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-13 22:40:03,033 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:40:03,195 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 3 proven. 37 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-13 22:40:03,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41786975] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:40:03,196 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:40:03,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2024-10-13 22:40:03,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729295204] [2024-10-13 22:40:03,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:40:03,196 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-10-13 22:40:03,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:40:03,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-10-13 22:40:03,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=310, Unknown=0, NotChecked=0, Total=462 [2024-10-13 22:40:03,197 INFO L87 Difference]: Start difference. First operand 191 states and 320 transitions. Second operand has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-10-13 22:40:03,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:40:03,629 INFO L93 Difference]: Finished difference Result 465 states and 758 transitions. [2024-10-13 22:40:03,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-10-13 22:40:03,630 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 71 [2024-10-13 22:40:03,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:40:03,632 INFO L225 Difference]: With dead ends: 465 [2024-10-13 22:40:03,632 INFO L226 Difference]: Without dead ends: 290 [2024-10-13 22:40:03,633 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=262, Invalid=440, Unknown=0, NotChecked=0, Total=702 [2024-10-13 22:40:03,633 INFO L432 NwaCegarLoop]: 110 mSDtfsCounter, 195 mSDsluCounter, 920 mSDsCounter, 0 mSdLazyCounter, 600 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 1030 SdHoareTripleChecker+Invalid, 611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-13 22:40:03,633 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 1030 Invalid, 611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 600 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-13 22:40:03,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2024-10-13 22:40:03,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 200. [2024-10-13 22:40:03,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 177 states have (on average 1.3502824858757063) internal successors, (239), 181 states have internal predecessors, (239), 13 states have call successors, (13), 3 states have call predecessors, (13), 9 states have return successors, (81), 15 states have call predecessors, (81), 12 states have call successors, (81) [2024-10-13 22:40:03,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 333 transitions. [2024-10-13 22:40:03,647 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 333 transitions. Word has length 71 [2024-10-13 22:40:03,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:40:03,647 INFO L471 AbstractCegarLoop]: Abstraction has 200 states and 333 transitions. [2024-10-13 22:40:03,648 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-10-13 22:40:03,648 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 333 transitions. [2024-10-13 22:40:03,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-10-13 22:40:03,649 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:40:03,649 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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] [2024-10-13 22:40:03,661 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-10-13 22:40:03,849 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-10-13 22:40:03,849 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:40:03,850 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:40:03,850 INFO L85 PathProgramCache]: Analyzing trace with hash -293932278, now seen corresponding path program 1 times [2024-10-13 22:40:03,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:40:03,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201366229] [2024-10-13 22:40:03,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:40:03,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:40:03,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:40:03,960 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-13 22:40:03,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:40:03,962 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-13 22:40:03,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:40:03,968 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-10-13 22:40:03,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:40:03,983 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-10-13 22:40:03,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:40:03,986 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2024-10-13 22:40:03,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:40:03,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201366229] [2024-10-13 22:40:03,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201366229] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:40:03,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601755426] [2024-10-13 22:40:03,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:40:03,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:40:03,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:40:03,988 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 22:40:03,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-10-13 22:40:04,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:40:04,047 INFO L255 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-10-13 22:40:04,048 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:40:04,089 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-10-13 22:40:04,090 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:40:04,236 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-10-13 22:40:04,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601755426] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:40:04,236 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:40:04,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 11] total 21 [2024-10-13 22:40:04,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217635333] [2024-10-13 22:40:04,236 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:40:04,237 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-13 22:40:04,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:40:04,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-13 22:40:04,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2024-10-13 22:40:04,237 INFO L87 Difference]: Start difference. First operand 200 states and 333 transitions. Second operand has 21 states, 16 states have (on average 3.6875) internal successors, (59), 17 states have internal predecessors, (59), 4 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (7), 6 states have call predecessors, (7), 3 states have call successors, (7) [2024-10-13 22:40:04,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:40:04,342 INFO L93 Difference]: Finished difference Result 210 states and 342 transitions. [2024-10-13 22:40:04,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-13 22:40:04,342 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 16 states have (on average 3.6875) internal successors, (59), 17 states have internal predecessors, (59), 4 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (7), 6 states have call predecessors, (7), 3 states have call successors, (7) Word has length 72 [2024-10-13 22:40:04,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:40:04,343 INFO L225 Difference]: With dead ends: 210 [2024-10-13 22:40:04,343 INFO L226 Difference]: Without dead ends: 165 [2024-10-13 22:40:04,343 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2024-10-13 22:40:04,344 INFO L432 NwaCegarLoop]: 86 mSDtfsCounter, 6 mSDsluCounter, 751 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 837 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-13 22:40:04,344 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 837 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-13 22:40:04,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2024-10-13 22:40:04,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2024-10-13 22:40:04,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 144 states have (on average 1.3611111111111112) internal successors, (196), 149 states have internal predecessors, (196), 11 states have call successors, (11), 3 states have call predecessors, (11), 9 states have return successors, (58), 12 states have call predecessors, (58), 10 states have call successors, (58) [2024-10-13 22:40:04,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 265 transitions. [2024-10-13 22:40:04,355 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 265 transitions. Word has length 72 [2024-10-13 22:40:04,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:40:04,356 INFO L471 AbstractCegarLoop]: Abstraction has 165 states and 265 transitions. [2024-10-13 22:40:04,356 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 16 states have (on average 3.6875) internal successors, (59), 17 states have internal predecessors, (59), 4 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (7), 6 states have call predecessors, (7), 3 states have call successors, (7) [2024-10-13 22:40:04,356 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 265 transitions. [2024-10-13 22:40:04,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-10-13 22:40:04,357 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:40:04,357 INFO L215 NwaCegarLoop]: trace histogram [11, 10, 10, 4, 4, 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] [2024-10-13 22:40:04,373 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-10-13 22:40:04,560 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:40:04,561 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:40:04,561 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:40:04,561 INFO L85 PathProgramCache]: Analyzing trace with hash -1758239640, now seen corresponding path program 2 times [2024-10-13 22:40:04,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:40:04,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382514460] [2024-10-13 22:40:04,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:40:04,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:40:04,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:40:04,621 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-13 22:40:04,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:40:04,622 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-13 22:40:04,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:40:04,760 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-10-13 22:40:04,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:40:04,762 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2024-10-13 22:40:04,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:40:04,763 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 3 proven. 162 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-13 22:40:04,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:40:04,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382514460] [2024-10-13 22:40:04,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382514460] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:40:04,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193645234] [2024-10-13 22:40:04,763 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-13 22:40:04,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:40:04,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:40:04,765 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 22:40:04,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-10-13 22:40:04,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-13 22:40:04,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 22:40:04,826 INFO L255 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-13 22:40:04,827 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:40:04,945 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 20 proven. 155 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-13 22:40:04,945 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:40:05,260 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 3 proven. 162 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-13 22:40:05,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193645234] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:40:05,260 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:40:05,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 38 [2024-10-13 22:40:05,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661699371] [2024-10-13 22:40:05,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:40:05,261 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-10-13 22:40:05,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:40:05,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-10-13 22:40:05,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=490, Invalid=916, Unknown=0, NotChecked=0, Total=1406 [2024-10-13 22:40:05,262 INFO L87 Difference]: Start difference. First operand 165 states and 265 transitions. Second operand has 38 states, 38 states have (on average 3.6842105263157894) internal successors, (140), 38 states have internal predecessors, (140), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-10-13 22:40:05,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:40:05,452 INFO L93 Difference]: Finished difference Result 494 states and 728 transitions. [2024-10-13 22:40:05,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-10-13 22:40:05,452 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.6842105263157894) internal successors, (140), 38 states have internal predecessors, (140), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 74 [2024-10-13 22:40:05,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:40:05,454 INFO L225 Difference]: With dead ends: 494 [2024-10-13 22:40:05,454 INFO L226 Difference]: Without dead ends: 349 [2024-10-13 22:40:05,455 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=525, Invalid=957, Unknown=0, NotChecked=0, Total=1482 [2024-10-13 22:40:05,455 INFO L432 NwaCegarLoop]: 76 mSDtfsCounter, 581 mSDsluCounter, 458 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 581 SdHoareTripleChecker+Valid, 534 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-13 22:40:05,455 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [581 Valid, 534 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-13 22:40:05,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2024-10-13 22:40:05,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 197. [2024-10-13 22:40:05,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 176 states have (on average 1.4147727272727273) internal successors, (249), 181 states have internal predecessors, (249), 11 states have call successors, (11), 3 states have call predecessors, (11), 9 states have return successors, (58), 12 states have call predecessors, (58), 10 states have call successors, (58) [2024-10-13 22:40:05,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 318 transitions. [2024-10-13 22:40:05,470 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 318 transitions. Word has length 74 [2024-10-13 22:40:05,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:40:05,471 INFO L471 AbstractCegarLoop]: Abstraction has 197 states and 318 transitions. [2024-10-13 22:40:05,471 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.6842105263157894) internal successors, (140), 38 states have internal predecessors, (140), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-10-13 22:40:05,471 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 318 transitions. [2024-10-13 22:40:05,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-10-13 22:40:05,472 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:40:05,472 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 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, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:40:05,485 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-10-13 22:40:05,676 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:40:05,677 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:40:05,677 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:40:05,677 INFO L85 PathProgramCache]: Analyzing trace with hash -872883213, now seen corresponding path program 1 times [2024-10-13 22:40:05,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:40:05,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101378857] [2024-10-13 22:40:05,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:40:05,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:40:05,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:40:05,736 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-13 22:40:05,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:40:05,738 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-13 22:40:05,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:40:05,743 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-10-13 22:40:05,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:40:05,744 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-10-13 22:40:05,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:40:05,746 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-10-13 22:40:05,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:40:05,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101378857] [2024-10-13 22:40:05,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101378857] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 22:40:05,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 22:40:05,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-13 22:40:05,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16875155] [2024-10-13 22:40:05,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 22:40:05,747 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-13 22:40:05,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:40:05,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-13 22:40:05,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-13 22:40:05,747 INFO L87 Difference]: Start difference. First operand 197 states and 318 transitions. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-13 22:40:05,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:40:05,773 INFO L93 Difference]: Finished difference Result 209 states and 330 transitions. [2024-10-13 22:40:05,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-13 22:40:05,774 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 74 [2024-10-13 22:40:05,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:40:05,776 INFO L225 Difference]: With dead ends: 209 [2024-10-13 22:40:05,776 INFO L226 Difference]: Without dead ends: 204 [2024-10-13 22:40:05,776 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-13 22:40:05,777 INFO L432 NwaCegarLoop]: 89 mSDtfsCounter, 1 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 22:40:05,777 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 255 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 22:40:05,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2024-10-13 22:40:05,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 203. [2024-10-13 22:40:05,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 182 states have (on average 1.401098901098901) internal successors, (255), 187 states have internal predecessors, (255), 11 states have call successors, (11), 3 states have call predecessors, (11), 9 states have return successors, (58), 12 states have call predecessors, (58), 10 states have call successors, (58) [2024-10-13 22:40:05,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 324 transitions. [2024-10-13 22:40:05,790 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 324 transitions. Word has length 74 [2024-10-13 22:40:05,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:40:05,790 INFO L471 AbstractCegarLoop]: Abstraction has 203 states and 324 transitions. [2024-10-13 22:40:05,790 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-13 22:40:05,791 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 324 transitions. [2024-10-13 22:40:05,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2024-10-13 22:40:05,791 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:40:05,792 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:40:05,792 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-10-13 22:40:05,792 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:40:05,792 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:40:05,792 INFO L85 PathProgramCache]: Analyzing trace with hash 131578640, now seen corresponding path program 1 times [2024-10-13 22:40:05,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:40:05,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614625613] [2024-10-13 22:40:05,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:40:05,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:40:05,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:40:05,864 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-13 22:40:05,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:40:05,865 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-13 22:40:05,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:40:05,976 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-10-13 22:40:05,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:40:05,978 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-10-13 22:40:05,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:40:05,980 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 3 proven. 38 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-10-13 22:40:05,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:40:05,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614625613] [2024-10-13 22:40:05,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614625613] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:40:05,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128018147] [2024-10-13 22:40:05,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:40:05,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:40:05,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:40:05,982 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 22:40:05,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-10-13 22:40:06,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:40:06,042 INFO L255 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-10-13 22:40:06,044 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:40:06,104 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2024-10-13 22:40:06,105 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-13 22:40:06,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128018147] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 22:40:06,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-13 22:40:06,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 15 [2024-10-13 22:40:06,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252056599] [2024-10-13 22:40:06,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 22:40:06,105 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-13 22:40:06,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:40:06,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-13 22:40:06,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2024-10-13 22:40:06,106 INFO L87 Difference]: Start difference. First operand 203 states and 324 transitions. Second operand has 8 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-13 22:40:06,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:40:06,174 INFO L93 Difference]: Finished difference Result 312 states and 488 transitions. [2024-10-13 22:40:06,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-13 22:40:06,175 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 75 [2024-10-13 22:40:06,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:40:06,177 INFO L225 Difference]: With dead ends: 312 [2024-10-13 22:40:06,177 INFO L226 Difference]: Without dead ends: 257 [2024-10-13 22:40:06,177 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2024-10-13 22:40:06,178 INFO L432 NwaCegarLoop]: 84 mSDtfsCounter, 46 mSDsluCounter, 490 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 574 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 22:40:06,178 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 574 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 22:40:06,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2024-10-13 22:40:06,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 241. [2024-10-13 22:40:06,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 216 states have (on average 1.3888888888888888) internal successors, (300), 218 states have internal predecessors, (300), 15 states have call successors, (15), 3 states have call predecessors, (15), 9 states have return successors, (86), 19 states have call predecessors, (86), 14 states have call successors, (86) [2024-10-13 22:40:06,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 401 transitions. [2024-10-13 22:40:06,194 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 401 transitions. Word has length 75 [2024-10-13 22:40:06,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:40:06,194 INFO L471 AbstractCegarLoop]: Abstraction has 241 states and 401 transitions. [2024-10-13 22:40:06,194 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-13 22:40:06,194 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 401 transitions. [2024-10-13 22:40:06,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2024-10-13 22:40:06,195 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:40:06,195 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:40:06,211 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-10-13 22:40:06,399 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:40:06,400 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:40:06,400 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:40:06,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1862566066, now seen corresponding path program 1 times [2024-10-13 22:40:06,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:40:06,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820306799] [2024-10-13 22:40:06,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:40:06,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:40:06,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:40:06,479 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-13 22:40:06,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:40:06,481 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-13 22:40:06,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:40:06,596 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-10-13 22:40:06,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:40:06,598 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-10-13 22:40:06,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:40:06,599 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 3 proven. 38 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-10-13 22:40:06,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:40:06,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820306799] [2024-10-13 22:40:06,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820306799] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:40:06,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732176567] [2024-10-13 22:40:06,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:40:06,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:40:06,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:40:06,601 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 22:40:06,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-10-13 22:40:06,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:40:06,759 INFO L255 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-10-13 22:40:06,761 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:40:06,838 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2024-10-13 22:40:06,838 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-13 22:40:06,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732176567] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 22:40:06,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-13 22:40:06,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 16 [2024-10-13 22:40:06,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522431915] [2024-10-13 22:40:06,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 22:40:06,839 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-13 22:40:06,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:40:06,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-13 22:40:06,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2024-10-13 22:40:06,839 INFO L87 Difference]: Start difference. First operand 241 states and 401 transitions. Second operand has 9 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-13 22:40:06,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:40:06,917 INFO L93 Difference]: Finished difference Result 284 states and 451 transitions. [2024-10-13 22:40:06,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-13 22:40:06,917 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 75 [2024-10-13 22:40:06,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:40:06,919 INFO L225 Difference]: With dead ends: 284 [2024-10-13 22:40:06,919 INFO L226 Difference]: Without dead ends: 258 [2024-10-13 22:40:06,919 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2024-10-13 22:40:06,919 INFO L432 NwaCegarLoop]: 83 mSDtfsCounter, 54 mSDsluCounter, 524 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 607 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-13 22:40:06,920 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 607 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-13 22:40:06,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2024-10-13 22:40:06,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 247. [2024-10-13 22:40:06,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 222 states have (on average 1.382882882882883) internal successors, (307), 224 states have internal predecessors, (307), 15 states have call successors, (15), 3 states have call predecessors, (15), 9 states have return successors, (86), 19 states have call predecessors, (86), 14 states have call successors, (86) [2024-10-13 22:40:06,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 408 transitions. [2024-10-13 22:40:06,934 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 408 transitions. Word has length 75 [2024-10-13 22:40:06,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:40:06,934 INFO L471 AbstractCegarLoop]: Abstraction has 247 states and 408 transitions. [2024-10-13 22:40:06,934 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-13 22:40:06,934 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 408 transitions. [2024-10-13 22:40:06,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2024-10-13 22:40:06,935 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:40:06,935 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:40:06,948 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-10-13 22:40:07,136 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-10-13 22:40:07,136 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:40:07,136 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:40:07,136 INFO L85 PathProgramCache]: Analyzing trace with hash -408521237, now seen corresponding path program 1 times [2024-10-13 22:40:07,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:40:07,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711994821] [2024-10-13 22:40:07,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:40:07,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:40:07,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:40:07,209 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-13 22:40:07,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:40:07,210 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-13 22:40:07,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:40:07,336 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-10-13 22:40:07,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:40:07,339 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-10-13 22:40:07,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:40:07,341 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 3 proven. 38 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-10-13 22:40:07,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:40:07,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711994821] [2024-10-13 22:40:07,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711994821] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:40:07,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206400389] [2024-10-13 22:40:07,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:40:07,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:40:07,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:40:07,343 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 22:40:07,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-10-13 22:40:07,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:40:07,412 INFO L255 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-10-13 22:40:07,414 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:40:07,507 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2024-10-13 22:40:07,507 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-13 22:40:07,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206400389] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 22:40:07,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-13 22:40:07,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 16 [2024-10-13 22:40:07,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329269900] [2024-10-13 22:40:07,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 22:40:07,510 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-13 22:40:07,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:40:07,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-13 22:40:07,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2024-10-13 22:40:07,511 INFO L87 Difference]: Start difference. First operand 247 states and 408 transitions. Second operand has 9 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-13 22:40:07,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:40:07,622 INFO L93 Difference]: Finished difference Result 286 states and 452 transitions. [2024-10-13 22:40:07,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-13 22:40:07,623 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 77 [2024-10-13 22:40:07,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:40:07,625 INFO L225 Difference]: With dead ends: 286 [2024-10-13 22:40:07,625 INFO L226 Difference]: Without dead ends: 256 [2024-10-13 22:40:07,625 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2024-10-13 22:40:07,626 INFO L432 NwaCegarLoop]: 85 mSDtfsCounter, 46 mSDsluCounter, 561 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 646 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-13 22:40:07,626 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 646 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-13 22:40:07,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2024-10-13 22:40:07,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 247. [2024-10-13 22:40:07,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 222 states have (on average 1.3783783783783783) internal successors, (306), 224 states have internal predecessors, (306), 15 states have call successors, (15), 3 states have call predecessors, (15), 9 states have return successors, (86), 19 states have call predecessors, (86), 14 states have call successors, (86) [2024-10-13 22:40:07,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 407 transitions. [2024-10-13 22:40:07,642 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 407 transitions. Word has length 77 [2024-10-13 22:40:07,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:40:07,642 INFO L471 AbstractCegarLoop]: Abstraction has 247 states and 407 transitions. [2024-10-13 22:40:07,642 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-13 22:40:07,642 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 407 transitions. [2024-10-13 22:40:07,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2024-10-13 22:40:07,644 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:40:07,644 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 9, 4, 4, 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] [2024-10-13 22:40:07,658 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-10-13 22:40:07,848 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-10-13 22:40:07,848 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:40:07,848 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:40:07,849 INFO L85 PathProgramCache]: Analyzing trace with hash -1309187367, now seen corresponding path program 3 times [2024-10-13 22:40:07,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:40:07,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138423450] [2024-10-13 22:40:07,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:40:07,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:40:07,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:40:07,964 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-13 22:40:07,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:40:07,965 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-13 22:40:07,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:40:08,202 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-10-13 22:40:08,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:40:08,205 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2024-10-13 22:40:08,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:40:08,206 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 3 proven. 142 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-13 22:40:08,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:40:08,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138423450] [2024-10-13 22:40:08,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138423450] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:40:08,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237358442] [2024-10-13 22:40:08,207 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-13 22:40:08,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:40:08,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:40:08,210 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 22:40:08,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-10-13 22:40:08,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2024-10-13 22:40:08,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 22:40:08,415 INFO L255 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-10-13 22:40:08,416 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:40:08,862 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 7 proven. 142 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-10-13 22:40:08,862 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:40:09,679 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 3 proven. 142 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-13 22:40:09,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237358442] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:40:09,679 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:40:09,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 23, 22] total 55 [2024-10-13 22:40:09,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115036222] [2024-10-13 22:40:09,680 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:40:09,680 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2024-10-13 22:40:09,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:40:09,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2024-10-13 22:40:09,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=2706, Unknown=0, NotChecked=0, Total=2970 [2024-10-13 22:40:09,682 INFO L87 Difference]: Start difference. First operand 247 states and 407 transitions. Second operand has 55 states, 52 states have (on average 3.0961538461538463) internal successors, (161), 51 states have internal predecessors, (161), 4 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (10), 8 states have call predecessors, (10), 4 states have call successors, (10) [2024-10-13 22:40:16,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:40:16,156 INFO L93 Difference]: Finished difference Result 863 states and 1493 transitions. [2024-10-13 22:40:16,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2024-10-13 22:40:16,157 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 52 states have (on average 3.0961538461538463) internal successors, (161), 51 states have internal predecessors, (161), 4 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (10), 8 states have call predecessors, (10), 4 states have call successors, (10) Word has length 78 [2024-10-13 22:40:16,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:40:16,161 INFO L225 Difference]: With dead ends: 863 [2024-10-13 22:40:16,162 INFO L226 Difference]: Without dead ends: 622 [2024-10-13 22:40:16,168 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5754 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=3426, Invalid=18924, Unknown=0, NotChecked=0, Total=22350 [2024-10-13 22:40:16,168 INFO L432 NwaCegarLoop]: 133 mSDtfsCounter, 2650 mSDsluCounter, 3777 mSDsCounter, 0 mSdLazyCounter, 4480 mSolverCounterSat, 908 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2668 SdHoareTripleChecker+Valid, 3910 SdHoareTripleChecker+Invalid, 5388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 908 IncrementalHoareTripleChecker+Valid, 4480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2024-10-13 22:40:16,168 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2668 Valid, 3910 Invalid, 5388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [908 Valid, 4480 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2024-10-13 22:40:16,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2024-10-13 22:40:16,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 248. [2024-10-13 22:40:16,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 223 states have (on average 1.3811659192825112) internal successors, (308), 225 states have internal predecessors, (308), 15 states have call successors, (15), 3 states have call predecessors, (15), 9 states have return successors, (86), 19 states have call predecessors, (86), 14 states have call successors, (86) [2024-10-13 22:40:16,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 409 transitions. [2024-10-13 22:40:16,192 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 409 transitions. Word has length 78 [2024-10-13 22:40:16,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:40:16,192 INFO L471 AbstractCegarLoop]: Abstraction has 248 states and 409 transitions. [2024-10-13 22:40:16,192 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 52 states have (on average 3.0961538461538463) internal successors, (161), 51 states have internal predecessors, (161), 4 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (10), 8 states have call predecessors, (10), 4 states have call successors, (10) [2024-10-13 22:40:16,192 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 409 transitions. [2024-10-13 22:40:16,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2024-10-13 22:40:16,193 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:40:16,194 INFO L215 NwaCegarLoop]: trace histogram [11, 11, 10, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:40:16,206 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-10-13 22:40:16,397 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-10-13 22:40:16,398 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:40:16,398 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:40:16,398 INFO L85 PathProgramCache]: Analyzing trace with hash -1145215511, now seen corresponding path program 1 times [2024-10-13 22:40:16,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:40:16,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563896581] [2024-10-13 22:40:16,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:40:16,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:40:16,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:40:16,469 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-13 22:40:16,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:40:16,470 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-13 22:40:16,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:40:16,477 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-10-13 22:40:16,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:40:16,494 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-10-13 22:40:16,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:40:16,499 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 194 trivial. 0 not checked. [2024-10-13 22:40:16,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:40:16,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563896581] [2024-10-13 22:40:16,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563896581] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:40:16,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033696926] [2024-10-13 22:40:16,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:40:16,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:40:16,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:40:16,502 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 22:40:16,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-10-13 22:40:16,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:40:16,573 INFO L255 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-13 22:40:16,574 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:40:16,639 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 194 trivial. 0 not checked. [2024-10-13 22:40:16,639 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:40:16,749 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 194 trivial. 0 not checked. [2024-10-13 22:40:16,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033696926] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:40:16,749 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:40:16,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 16 [2024-10-13 22:40:16,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588045462] [2024-10-13 22:40:16,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:40:16,750 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-13 22:40:16,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:40:16,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-13 22:40:16,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2024-10-13 22:40:16,750 INFO L87 Difference]: Start difference. First operand 248 states and 409 transitions. Second operand has 16 states, 14 states have (on average 4.071428571428571) internal successors, (57), 14 states have internal predecessors, (57), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2024-10-13 22:40:16,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:40:16,880 INFO L93 Difference]: Finished difference Result 292 states and 460 transitions. [2024-10-13 22:40:16,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-13 22:40:16,881 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 4.071428571428571) internal successors, (57), 14 states have internal predecessors, (57), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 96 [2024-10-13 22:40:16,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:40:16,882 INFO L225 Difference]: With dead ends: 292 [2024-10-13 22:40:16,882 INFO L226 Difference]: Without dead ends: 258 [2024-10-13 22:40:16,883 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 190 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2024-10-13 22:40:16,883 INFO L432 NwaCegarLoop]: 84 mSDtfsCounter, 44 mSDsluCounter, 976 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 1060 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-13 22:40:16,883 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 1060 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-13 22:40:16,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2024-10-13 22:40:16,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 248. [2024-10-13 22:40:16,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 223 states have (on average 1.3721973094170403) internal successors, (306), 225 states have internal predecessors, (306), 15 states have call successors, (15), 3 states have call predecessors, (15), 9 states have return successors, (86), 19 states have call predecessors, (86), 14 states have call successors, (86) [2024-10-13 22:40:16,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 407 transitions. [2024-10-13 22:40:16,913 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 407 transitions. Word has length 96 [2024-10-13 22:40:16,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:40:16,913 INFO L471 AbstractCegarLoop]: Abstraction has 248 states and 407 transitions. [2024-10-13 22:40:16,913 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 4.071428571428571) internal successors, (57), 14 states have internal predecessors, (57), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2024-10-13 22:40:16,913 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 407 transitions. [2024-10-13 22:40:16,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2024-10-13 22:40:16,914 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:40:16,914 INFO L215 NwaCegarLoop]: trace histogram [11, 11, 10, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:40:16,927 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-10-13 22:40:17,118 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:40:17,119 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:40:17,119 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:40:17,119 INFO L85 PathProgramCache]: Analyzing trace with hash 1155607079, now seen corresponding path program 1 times [2024-10-13 22:40:17,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:40:17,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843411581] [2024-10-13 22:40:17,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:40:17,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:40:17,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:40:17,230 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-13 22:40:17,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:40:17,231 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-13 22:40:17,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:40:17,481 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-10-13 22:40:17,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:40:17,483 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-10-13 22:40:17,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:40:17,486 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 3 proven. 179 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-10-13 22:40:17,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:40:17,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843411581] [2024-10-13 22:40:17,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843411581] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:40:17,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281161127] [2024-10-13 22:40:17,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:40:17,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:40:17,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:40:17,488 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 22:40:17,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-10-13 22:40:17,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:40:17,686 INFO L255 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-10-13 22:40:17,688 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:40:17,777 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 194 trivial. 0 not checked. [2024-10-13 22:40:17,777 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:40:17,924 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 194 trivial. 0 not checked. [2024-10-13 22:40:17,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281161127] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:40:17,925 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:40:17,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8, 8] total 27 [2024-10-13 22:40:17,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470631337] [2024-10-13 22:40:17,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:40:17,926 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-10-13 22:40:17,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:40:17,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-10-13 22:40:17,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=632, Unknown=0, NotChecked=0, Total=702 [2024-10-13 22:40:17,926 INFO L87 Difference]: Start difference. First operand 248 states and 407 transitions. Second operand has 27 states, 25 states have (on average 4.0) internal successors, (100), 25 states have internal predecessors, (100), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) [2024-10-13 22:40:18,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:40:18,785 INFO L93 Difference]: Finished difference Result 516 states and 847 transitions. [2024-10-13 22:40:18,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-10-13 22:40:18,786 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 4.0) internal successors, (100), 25 states have internal predecessors, (100), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) Word has length 96 [2024-10-13 22:40:18,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:40:18,788 INFO L225 Difference]: With dead ends: 516 [2024-10-13 22:40:18,788 INFO L226 Difference]: Without dead ends: 295 [2024-10-13 22:40:18,789 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=286, Invalid=1606, Unknown=0, NotChecked=0, Total=1892 [2024-10-13 22:40:18,790 INFO L432 NwaCegarLoop]: 82 mSDtfsCounter, 285 mSDsluCounter, 1422 mSDsCounter, 0 mSdLazyCounter, 1205 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 1504 SdHoareTripleChecker+Invalid, 1246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-13 22:40:18,790 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [285 Valid, 1504 Invalid, 1246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1205 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-13 22:40:18,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2024-10-13 22:40:18,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 242. [2024-10-13 22:40:18,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 217 states have (on average 1.368663594470046) internal successors, (297), 219 states have internal predecessors, (297), 15 states have call successors, (15), 3 states have call predecessors, (15), 9 states have return successors, (86), 19 states have call predecessors, (86), 14 states have call successors, (86) [2024-10-13 22:40:18,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 398 transitions. [2024-10-13 22:40:18,812 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 398 transitions. Word has length 96 [2024-10-13 22:40:18,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:40:18,812 INFO L471 AbstractCegarLoop]: Abstraction has 242 states and 398 transitions. [2024-10-13 22:40:18,813 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 4.0) internal successors, (100), 25 states have internal predecessors, (100), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) [2024-10-13 22:40:18,813 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 398 transitions. [2024-10-13 22:40:18,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2024-10-13 22:40:18,815 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:40:18,815 INFO L215 NwaCegarLoop]: trace histogram [12, 12, 11, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:40:18,827 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-10-13 22:40:19,015 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:40:19,016 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:40:19,016 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:40:19,016 INFO L85 PathProgramCache]: Analyzing trace with hash 209642660, now seen corresponding path program 1 times [2024-10-13 22:40:19,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:40:19,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273818776] [2024-10-13 22:40:19,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:40:19,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:40:19,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:40:19,105 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-13 22:40:19,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:40:19,107 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-13 22:40:19,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:40:19,310 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2024-10-13 22:40:19,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:40:19,312 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-10-13 22:40:19,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:40:19,314 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 3 proven. 206 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-10-13 22:40:19,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:40:19,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273818776] [2024-10-13 22:40:19,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273818776] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:40:19,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693023567] [2024-10-13 22:40:19,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:40:19,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:40:19,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:40:19,316 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 22:40:19,318 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-10-13 22:40:19,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:40:19,397 INFO L255 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-10-13 22:40:19,399 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:40:19,636 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 21 proven. 198 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-13 22:40:19,636 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:40:20,065 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 3 proven. 206 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-10-13 22:40:20,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693023567] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:40:20,066 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:40:20,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 43 [2024-10-13 22:40:20,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189889413] [2024-10-13 22:40:20,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:40:20,066 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-10-13 22:40:20,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:40:20,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-10-13 22:40:20,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=509, Invalid=1297, Unknown=0, NotChecked=0, Total=1806 [2024-10-13 22:40:20,068 INFO L87 Difference]: Start difference. First operand 242 states and 398 transitions. Second operand has 43 states, 43 states have (on average 4.186046511627907) internal successors, (180), 43 states have internal predecessors, (180), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-10-13 22:40:21,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:40:21,578 INFO L93 Difference]: Finished difference Result 669 states and 1053 transitions. [2024-10-13 22:40:21,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-10-13 22:40:21,578 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 4.186046511627907) internal successors, (180), 43 states have internal predecessors, (180), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 99 [2024-10-13 22:40:21,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:40:21,581 INFO L225 Difference]: With dead ends: 669 [2024-10-13 22:40:21,581 INFO L226 Difference]: Without dead ends: 445 [2024-10-13 22:40:21,582 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 937 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1025, Invalid=1945, Unknown=0, NotChecked=0, Total=2970 [2024-10-13 22:40:21,583 INFO L432 NwaCegarLoop]: 159 mSDtfsCounter, 757 mSDsluCounter, 2756 mSDsCounter, 0 mSdLazyCounter, 1940 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 757 SdHoareTripleChecker+Valid, 2915 SdHoareTripleChecker+Invalid, 1990 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 1940 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-10-13 22:40:21,583 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [757 Valid, 2915 Invalid, 1990 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 1940 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-10-13 22:40:21,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2024-10-13 22:40:21,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 257. [2024-10-13 22:40:21,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 232 states have (on average 1.3793103448275863) internal successors, (320), 234 states have internal predecessors, (320), 15 states have call successors, (15), 3 states have call predecessors, (15), 9 states have return successors, (86), 19 states have call predecessors, (86), 14 states have call successors, (86) [2024-10-13 22:40:21,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 421 transitions. [2024-10-13 22:40:21,605 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 421 transitions. Word has length 99 [2024-10-13 22:40:21,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:40:21,605 INFO L471 AbstractCegarLoop]: Abstraction has 257 states and 421 transitions. [2024-10-13 22:40:21,605 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 4.186046511627907) internal successors, (180), 43 states have internal predecessors, (180), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-10-13 22:40:21,606 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 421 transitions. [2024-10-13 22:40:21,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2024-10-13 22:40:21,606 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:40:21,607 INFO L215 NwaCegarLoop]: trace histogram [12, 12, 11, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:40:21,619 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-10-13 22:40:21,810 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2024-10-13 22:40:21,811 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:40:21,811 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:40:21,811 INFO L85 PathProgramCache]: Analyzing trace with hash 970353726, now seen corresponding path program 1 times [2024-10-13 22:40:21,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:40:21,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588078670] [2024-10-13 22:40:21,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:40:21,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:40:21,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:40:21,928 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-13 22:40:21,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:40:21,929 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-13 22:40:21,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:40:22,193 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2024-10-13 22:40:22,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:40:22,195 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2024-10-13 22:40:22,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:40:22,197 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 3 proven. 206 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-10-13 22:40:22,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:40:22,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588078670] [2024-10-13 22:40:22,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588078670] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:40:22,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476985345] [2024-10-13 22:40:22,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:40:22,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:40:22,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:40:22,198 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 22:40:22,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-10-13 22:40:22,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:40:22,368 INFO L255 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-10-13 22:40:22,369 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:40:22,519 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-10-13 22:40:22,519 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-13 22:40:22,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476985345] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 22:40:22,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-13 22:40:22,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [16] total 25 [2024-10-13 22:40:22,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388098053] [2024-10-13 22:40:22,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 22:40:22,520 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-13 22:40:22,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:40:22,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-13 22:40:22,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2024-10-13 22:40:22,521 INFO L87 Difference]: Start difference. First operand 257 states and 421 transitions. Second operand has 11 states, 9 states have (on average 5.333333333333333) internal successors, (48), 9 states have internal predecessors, (48), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-13 22:40:22,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:40:22,656 INFO L93 Difference]: Finished difference Result 294 states and 463 transitions. [2024-10-13 22:40:22,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-13 22:40:22,656 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 5.333333333333333) internal successors, (48), 9 states have internal predecessors, (48), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 100 [2024-10-13 22:40:22,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:40:22,658 INFO L225 Difference]: With dead ends: 294 [2024-10-13 22:40:22,658 INFO L226 Difference]: Without dead ends: 258 [2024-10-13 22:40:22,658 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=78, Invalid=734, Unknown=0, NotChecked=0, Total=812 [2024-10-13 22:40:22,659 INFO L432 NwaCegarLoop]: 103 mSDtfsCounter, 47 mSDsluCounter, 772 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 875 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-13 22:40:22,659 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 875 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-13 22:40:22,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2024-10-13 22:40:22,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 245. [2024-10-13 22:40:22,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 222 states have (on average 1.3963963963963963) internal successors, (310), 225 states have internal predecessors, (310), 13 states have call successors, (13), 3 states have call predecessors, (13), 9 states have return successors, (71), 16 states have call predecessors, (71), 12 states have call successors, (71) [2024-10-13 22:40:22,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 394 transitions. [2024-10-13 22:40:22,679 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 394 transitions. Word has length 100 [2024-10-13 22:40:22,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:40:22,679 INFO L471 AbstractCegarLoop]: Abstraction has 245 states and 394 transitions. [2024-10-13 22:40:22,679 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 5.333333333333333) internal successors, (48), 9 states have internal predecessors, (48), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-13 22:40:22,679 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 394 transitions. [2024-10-13 22:40:22,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2024-10-13 22:40:22,680 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:40:22,680 INFO L215 NwaCegarLoop]: trace histogram [12, 12, 11, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:40:22,693 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2024-10-13 22:40:22,881 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2024-10-13 22:40:22,881 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:40:22,881 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:40:22,881 INFO L85 PathProgramCache]: Analyzing trace with hash -61095346, now seen corresponding path program 1 times [2024-10-13 22:40:22,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:40:22,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827724856] [2024-10-13 22:40:22,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:40:22,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:40:22,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:40:23,016 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-13 22:40:23,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:40:23,017 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-13 22:40:23,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:40:23,250 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2024-10-13 22:40:23,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:40:23,251 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2024-10-13 22:40:23,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:40:23,254 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 3 proven. 212 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-10-13 22:40:23,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:40:23,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827724856] [2024-10-13 22:40:23,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827724856] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:40:23,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708942755] [2024-10-13 22:40:23,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:40:23,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:40:23,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:40:23,255 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 22:40:23,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-10-13 22:40:23,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:40:23,704 INFO L255 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 67 conjuncts are in the unsatisfiable core [2024-10-13 22:40:23,706 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:40:24,347 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 5 proven. 214 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-10-13 22:40:24,347 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:40:24,999 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 227 trivial. 0 not checked. [2024-10-13 22:40:24,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708942755] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:40:24,999 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:40:25,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 28, 13] total 53 [2024-10-13 22:40:25,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028056547] [2024-10-13 22:40:25,000 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:40:25,000 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2024-10-13 22:40:25,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:40:25,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2024-10-13 22:40:25,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=2594, Unknown=0, NotChecked=0, Total=2756 [2024-10-13 22:40:25,001 INFO L87 Difference]: Start difference. First operand 245 states and 394 transitions. Second operand has 53 states, 49 states have (on average 3.4489795918367347) internal successors, (169), 50 states have internal predecessors, (169), 5 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (10), 7 states have call predecessors, (10), 5 states have call successors, (10) [2024-10-13 22:40:29,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:40:29,575 INFO L93 Difference]: Finished difference Result 603 states and 942 transitions. [2024-10-13 22:40:29,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2024-10-13 22:40:29,576 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 49 states have (on average 3.4489795918367347) internal successors, (169), 50 states have internal predecessors, (169), 5 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (10), 7 states have call predecessors, (10), 5 states have call successors, (10) Word has length 101 [2024-10-13 22:40:29,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:40:29,578 INFO L225 Difference]: With dead ends: 603 [2024-10-13 22:40:29,578 INFO L226 Difference]: Without dead ends: 380 [2024-10-13 22:40:29,581 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3015 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=969, Invalid=13793, Unknown=0, NotChecked=0, Total=14762 [2024-10-13 22:40:29,581 INFO L432 NwaCegarLoop]: 128 mSDtfsCounter, 378 mSDsluCounter, 4231 mSDsCounter, 0 mSdLazyCounter, 6171 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 378 SdHoareTripleChecker+Valid, 4359 SdHoareTripleChecker+Invalid, 6244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 6171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2024-10-13 22:40:29,581 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [378 Valid, 4359 Invalid, 6244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 6171 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2024-10-13 22:40:29,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2024-10-13 22:40:29,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 245. [2024-10-13 22:40:29,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 222 states have (on average 1.3918918918918919) internal successors, (309), 225 states have internal predecessors, (309), 13 states have call successors, (13), 3 states have call predecessors, (13), 9 states have return successors, (71), 16 states have call predecessors, (71), 12 states have call successors, (71) [2024-10-13 22:40:29,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 393 transitions. [2024-10-13 22:40:29,618 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 393 transitions. Word has length 101 [2024-10-13 22:40:29,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:40:29,618 INFO L471 AbstractCegarLoop]: Abstraction has 245 states and 393 transitions. [2024-10-13 22:40:29,619 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 49 states have (on average 3.4489795918367347) internal successors, (169), 50 states have internal predecessors, (169), 5 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (10), 7 states have call predecessors, (10), 5 states have call successors, (10) [2024-10-13 22:40:29,619 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 393 transitions. [2024-10-13 22:40:29,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2024-10-13 22:40:29,620 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:40:29,621 INFO L215 NwaCegarLoop]: trace histogram [13, 13, 12, 4, 4, 3, 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] [2024-10-13 22:40:29,633 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-10-13 22:40:29,824 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:40:29,825 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:40:29,825 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:40:29,825 INFO L85 PathProgramCache]: Analyzing trace with hash 1678978970, now seen corresponding path program 1 times [2024-10-13 22:40:29,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:40:29,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81296885] [2024-10-13 22:40:29,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:40:29,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:40:29,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:40:29,926 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-13 22:40:29,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:40:29,928 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-13 22:40:29,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:40:30,190 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-10-13 22:40:30,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:40:30,193 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2024-10-13 22:40:30,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:40:30,195 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 3 proven. 248 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-10-13 22:40:30,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:40:30,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81296885] [2024-10-13 22:40:30,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81296885] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:40:30,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691419142] [2024-10-13 22:40:30,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:40:30,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:40:30,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:40:30,197 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 22:40:30,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-10-13 22:40:30,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:40:30,276 INFO L255 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-13 22:40:30,277 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:40:30,354 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 263 trivial. 0 not checked. [2024-10-13 22:40:30,355 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-13 22:40:30,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691419142] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 22:40:30,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-13 22:40:30,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [17] total 23 [2024-10-13 22:40:30,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440306864] [2024-10-13 22:40:30,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 22:40:30,355 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-13 22:40:30,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:40:30,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-13 22:40:30,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2024-10-13 22:40:30,356 INFO L87 Difference]: Start difference. First operand 245 states and 393 transitions. Second operand has 8 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-13 22:40:30,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:40:30,414 INFO L93 Difference]: Finished difference Result 300 states and 461 transitions. [2024-10-13 22:40:30,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-13 22:40:30,414 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 104 [2024-10-13 22:40:30,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:40:30,415 INFO L225 Difference]: With dead ends: 300 [2024-10-13 22:40:30,415 INFO L226 Difference]: Without dead ends: 256 [2024-10-13 22:40:30,416 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2024-10-13 22:40:30,416 INFO L432 NwaCegarLoop]: 86 mSDtfsCounter, 8 mSDsluCounter, 484 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 570 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 22:40:30,416 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 570 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 22:40:30,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2024-10-13 22:40:30,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 249. [2024-10-13 22:40:30,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 226 states have (on average 1.3893805309734513) internal successors, (314), 228 states have internal predecessors, (314), 13 states have call successors, (13), 3 states have call predecessors, (13), 9 states have return successors, (71), 17 states have call predecessors, (71), 12 states have call successors, (71) [2024-10-13 22:40:30,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 398 transitions. [2024-10-13 22:40:30,439 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 398 transitions. Word has length 104 [2024-10-13 22:40:30,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:40:30,439 INFO L471 AbstractCegarLoop]: Abstraction has 249 states and 398 transitions. [2024-10-13 22:40:30,439 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-13 22:40:30,439 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 398 transitions. [2024-10-13 22:40:30,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2024-10-13 22:40:30,440 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:40:30,440 INFO L215 NwaCegarLoop]: trace histogram [13, 13, 12, 4, 4, 3, 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] [2024-10-13 22:40:30,453 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2024-10-13 22:40:30,641 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:40:30,641 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:40:30,641 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:40:30,641 INFO L85 PathProgramCache]: Analyzing trace with hash -315165736, now seen corresponding path program 1 times [2024-10-13 22:40:30,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:40:30,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147868917] [2024-10-13 22:40:30,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:40:30,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:40:30,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:40:30,754 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-13 22:40:30,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:40:30,755 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-13 22:40:30,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:40:30,997 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-10-13 22:40:31,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:40:31,003 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2024-10-13 22:40:31,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:40:31,005 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 3 proven. 248 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-10-13 22:40:31,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:40:31,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147868917] [2024-10-13 22:40:31,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147868917] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:40:31,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550171609] [2024-10-13 22:40:31,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:40:31,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:40:31,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:40:31,007 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 22:40:31,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-10-13 22:40:31,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:40:31,564 INFO L255 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-10-13 22:40:31,566 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:40:31,630 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 263 trivial. 0 not checked. [2024-10-13 22:40:31,630 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-13 22:40:31,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550171609] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 22:40:31,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-13 22:40:31,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [17] total 22 [2024-10-13 22:40:31,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868485985] [2024-10-13 22:40:31,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 22:40:31,630 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-13 22:40:31,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:40:31,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-13 22:40:31,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2024-10-13 22:40:31,631 INFO L87 Difference]: Start difference. First operand 249 states and 398 transitions. Second operand has 7 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-13 22:40:31,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:40:31,679 INFO L93 Difference]: Finished difference Result 297 states and 457 transitions. [2024-10-13 22:40:31,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-13 22:40:31,679 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 104 [2024-10-13 22:40:31,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:40:31,680 INFO L225 Difference]: With dead ends: 297 [2024-10-13 22:40:31,680 INFO L226 Difference]: Without dead ends: 257 [2024-10-13 22:40:31,681 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2024-10-13 22:40:31,681 INFO L432 NwaCegarLoop]: 87 mSDtfsCounter, 5 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 504 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 22:40:31,681 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 504 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 22:40:31,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2024-10-13 22:40:31,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 255. [2024-10-13 22:40:31,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 232 states have (on average 1.3836206896551724) internal successors, (321), 234 states have internal predecessors, (321), 13 states have call successors, (13), 3 states have call predecessors, (13), 9 states have return successors, (71), 17 states have call predecessors, (71), 12 states have call successors, (71) [2024-10-13 22:40:31,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 405 transitions. [2024-10-13 22:40:31,712 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 405 transitions. Word has length 104 [2024-10-13 22:40:31,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:40:31,712 INFO L471 AbstractCegarLoop]: Abstraction has 255 states and 405 transitions. [2024-10-13 22:40:31,712 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-13 22:40:31,712 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 405 transitions. [2024-10-13 22:40:31,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2024-10-13 22:40:31,713 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:40:31,713 INFO L215 NwaCegarLoop]: trace histogram [13, 13, 12, 4, 4, 3, 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] [2024-10-13 22:40:31,727 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2024-10-13 22:40:31,913 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:40:31,914 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:40:31,914 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:40:31,914 INFO L85 PathProgramCache]: Analyzing trace with hash 775678167, now seen corresponding path program 1 times [2024-10-13 22:40:31,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:40:31,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477107665] [2024-10-13 22:40:31,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:40:31,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:40:31,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:40:32,035 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-13 22:40:32,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:40:32,037 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-13 22:40:32,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:40:32,281 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-10-13 22:40:32,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:40:32,284 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2024-10-13 22:40:32,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:40:32,286 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 3 proven. 248 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-10-13 22:40:32,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:40:32,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477107665] [2024-10-13 22:40:32,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477107665] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:40:32,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327689225] [2024-10-13 22:40:32,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:40:32,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:40:32,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:40:32,287 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 22:40:32,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-10-13 22:40:32,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:40:32,493 INFO L255 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-10-13 22:40:32,494 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:40:32,677 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 263 trivial. 0 not checked. [2024-10-13 22:40:32,677 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-13 22:40:32,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327689225] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 22:40:32,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-13 22:40:32,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [17] total 25 [2024-10-13 22:40:32,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276509431] [2024-10-13 22:40:32,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 22:40:32,678 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-13 22:40:32,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:40:32,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-13 22:40:32,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2024-10-13 22:40:32,678 INFO L87 Difference]: Start difference. First operand 255 states and 405 transitions. Second operand has 10 states, 9 states have (on average 5.333333333333333) internal successors, (48), 9 states have internal predecessors, (48), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-13 22:40:32,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:40:32,773 INFO L93 Difference]: Finished difference Result 285 states and 443 transitions. [2024-10-13 22:40:32,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-13 22:40:32,773 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.333333333333333) internal successors, (48), 9 states have internal predecessors, (48), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 106 [2024-10-13 22:40:32,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:40:32,775 INFO L225 Difference]: With dead ends: 285 [2024-10-13 22:40:32,775 INFO L226 Difference]: Without dead ends: 274 [2024-10-13 22:40:32,775 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2024-10-13 22:40:32,775 INFO L432 NwaCegarLoop]: 80 mSDtfsCounter, 21 mSDsluCounter, 545 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 625 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-13 22:40:32,775 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 625 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-13 22:40:32,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2024-10-13 22:40:32,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 264. [2024-10-13 22:40:32,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 241 states have (on average 1.3775933609958506) internal successors, (332), 243 states have internal predecessors, (332), 13 states have call successors, (13), 3 states have call predecessors, (13), 9 states have return successors, (71), 17 states have call predecessors, (71), 12 states have call successors, (71) [2024-10-13 22:40:32,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 416 transitions. [2024-10-13 22:40:32,798 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 416 transitions. Word has length 106 [2024-10-13 22:40:32,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:40:32,798 INFO L471 AbstractCegarLoop]: Abstraction has 264 states and 416 transitions. [2024-10-13 22:40:32,798 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.333333333333333) internal successors, (48), 9 states have internal predecessors, (48), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-13 22:40:32,798 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 416 transitions. [2024-10-13 22:40:32,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2024-10-13 22:40:32,799 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:40:32,799 INFO L215 NwaCegarLoop]: trace histogram [13, 13, 12, 4, 4, 3, 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] [2024-10-13 22:40:32,813 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2024-10-13 22:40:33,000 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-10-13 22:40:33,000 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:40:33,000 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:40:33,000 INFO L85 PathProgramCache]: Analyzing trace with hash 584511477, now seen corresponding path program 1 times [2024-10-13 22:40:33,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:40:33,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034846728] [2024-10-13 22:40:33,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:40:33,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:40:33,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:40:33,112 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-13 22:40:33,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:40:33,113 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-13 22:40:33,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:40:33,372 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-10-13 22:40:33,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:40:33,375 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2024-10-13 22:40:33,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:40:33,376 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 3 proven. 248 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-10-13 22:40:33,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:40:33,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034846728] [2024-10-13 22:40:33,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034846728] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:40:33,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220071828] [2024-10-13 22:40:33,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:40:33,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:40:33,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:40:33,378 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 22:40:33,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-10-13 22:40:33,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:40:33,444 INFO L255 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-10-13 22:40:33,445 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:40:33,785 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 17 proven. 6 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2024-10-13 22:40:33,785 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:40:34,074 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 258 trivial. 0 not checked. [2024-10-13 22:40:34,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220071828] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:40:34,075 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:40:34,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13, 12] total 38 [2024-10-13 22:40:34,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703846916] [2024-10-13 22:40:34,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:40:34,075 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-10-13 22:40:34,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:40:34,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-10-13 22:40:34,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1306, Unknown=0, NotChecked=0, Total=1406 [2024-10-13 22:40:34,076 INFO L87 Difference]: Start difference. First operand 264 states and 416 transitions. Second operand has 38 states, 32 states have (on average 4.0) internal successors, (128), 34 states have internal predecessors, (128), 5 states have call successors, (11), 2 states have call predecessors, (11), 6 states have return successors, (11), 7 states have call predecessors, (11), 5 states have call successors, (11) [2024-10-13 22:40:37,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:40:37,056 INFO L93 Difference]: Finished difference Result 706 states and 1241 transitions. [2024-10-13 22:40:37,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2024-10-13 22:40:37,057 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 32 states have (on average 4.0) internal successors, (128), 34 states have internal predecessors, (128), 5 states have call successors, (11), 2 states have call predecessors, (11), 6 states have return successors, (11), 7 states have call predecessors, (11), 5 states have call successors, (11) Word has length 106 [2024-10-13 22:40:37,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:40:37,059 INFO L225 Difference]: With dead ends: 706 [2024-10-13 22:40:37,060 INFO L226 Difference]: Without dead ends: 466 [2024-10-13 22:40:37,064 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2894 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1089, Invalid=10901, Unknown=0, NotChecked=0, Total=11990 [2024-10-13 22:40:37,065 INFO L432 NwaCegarLoop]: 86 mSDtfsCounter, 328 mSDsluCounter, 2489 mSDsCounter, 0 mSdLazyCounter, 2565 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 2575 SdHoareTripleChecker+Invalid, 2679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 2565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-10-13 22:40:37,065 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [355 Valid, 2575 Invalid, 2679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 2565 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-10-13 22:40:37,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2024-10-13 22:40:37,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 273. [2024-10-13 22:40:37,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 247 states have (on average 1.368421052631579) internal successors, (338), 249 states have internal predecessors, (338), 15 states have call successors, (15), 3 states have call predecessors, (15), 10 states have return successors, (98), 20 states have call predecessors, (98), 14 states have call successors, (98) [2024-10-13 22:40:37,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 451 transitions. [2024-10-13 22:40:37,107 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 451 transitions. Word has length 106 [2024-10-13 22:40:37,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:40:37,107 INFO L471 AbstractCegarLoop]: Abstraction has 273 states and 451 transitions. [2024-10-13 22:40:37,107 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 32 states have (on average 4.0) internal successors, (128), 34 states have internal predecessors, (128), 5 states have call successors, (11), 2 states have call predecessors, (11), 6 states have return successors, (11), 7 states have call predecessors, (11), 5 states have call successors, (11) [2024-10-13 22:40:37,107 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 451 transitions. [2024-10-13 22:40:37,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2024-10-13 22:40:37,108 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:40:37,108 INFO L215 NwaCegarLoop]: trace histogram [23, 22, 22, 4, 4, 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] [2024-10-13 22:40:37,120 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2024-10-13 22:40:37,309 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-10-13 22:40:37,309 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:40:37,309 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:40:37,309 INFO L85 PathProgramCache]: Analyzing trace with hash -758332696, now seen corresponding path program 3 times [2024-10-13 22:40:37,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:40:37,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512073817] [2024-10-13 22:40:37,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:40:37,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:40:37,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:40:37,420 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-13 22:40:37,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:40:37,422 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-13 22:40:37,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:40:37,794 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2024-10-13 22:40:37,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:40:37,795 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2024-10-13 22:40:37,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:40:37,797 INFO L134 CoverageAnalysis]: Checked inductivity of 762 backedges. 3 proven. 744 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-13 22:40:37,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:40:37,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512073817] [2024-10-13 22:40:37,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512073817] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:40:37,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730872478] [2024-10-13 22:40:37,797 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-13 22:40:37,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:40:37,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:40:37,798 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 22:40:37,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-10-13 22:40:37,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) [2024-10-13 22:40:37,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 22:40:37,880 INFO L255 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-10-13 22:40:37,881 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:40:38,142 INFO L134 CoverageAnalysis]: Checked inductivity of 762 backedges. 20 proven. 737 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-13 22:40:38,142 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:40:39,007 INFO L134 CoverageAnalysis]: Checked inductivity of 762 backedges. 3 proven. 744 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-13 22:40:39,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730872478] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:40:39,008 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:40:39,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 74 [2024-10-13 22:40:39,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733855199] [2024-10-13 22:40:39,008 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:40:39,008 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2024-10-13 22:40:39,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:40:39,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2024-10-13 22:40:39,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1846, Invalid=3556, Unknown=0, NotChecked=0, Total=5402 [2024-10-13 22:40:39,010 INFO L87 Difference]: Start difference. First operand 273 states and 451 transitions. Second operand has 74 states, 74 states have (on average 3.3513513513513513) internal successors, (248), 74 states have internal predecessors, (248), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-10-13 22:40:39,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:40:39,415 INFO L93 Difference]: Finished difference Result 878 states and 1313 transitions. [2024-10-13 22:40:39,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2024-10-13 22:40:39,415 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 3.3513513513513513) internal successors, (248), 74 states have internal predecessors, (248), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 110 [2024-10-13 22:40:39,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:40:39,419 INFO L225 Difference]: With dead ends: 878 [2024-10-13 22:40:39,419 INFO L226 Difference]: Without dead ends: 655 [2024-10-13 22:40:39,421 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2287 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1917, Invalid=3633, Unknown=0, NotChecked=0, Total=5550 [2024-10-13 22:40:39,421 INFO L432 NwaCegarLoop]: 76 mSDtfsCounter, 1411 mSDsluCounter, 853 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1411 SdHoareTripleChecker+Valid, 929 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-13 22:40:39,421 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1411 Valid, 929 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 337 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-13 22:40:39,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2024-10-13 22:40:39,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 335. [2024-10-13 22:40:39,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 309 states have (on average 1.4271844660194175) internal successors, (441), 311 states have internal predecessors, (441), 15 states have call successors, (15), 3 states have call predecessors, (15), 10 states have return successors, (98), 20 states have call predecessors, (98), 14 states have call successors, (98) [2024-10-13 22:40:39,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 554 transitions. [2024-10-13 22:40:39,469 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 554 transitions. Word has length 110 [2024-10-13 22:40:39,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:40:39,469 INFO L471 AbstractCegarLoop]: Abstraction has 335 states and 554 transitions. [2024-10-13 22:40:39,469 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 3.3513513513513513) internal successors, (248), 74 states have internal predecessors, (248), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-10-13 22:40:39,470 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 554 transitions. [2024-10-13 22:40:39,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2024-10-13 22:40:39,471 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:40:39,471 INFO L215 NwaCegarLoop]: trace histogram [14, 14, 13, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:40:39,484 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2024-10-13 22:40:39,671 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-10-13 22:40:39,671 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:40:39,672 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:40:39,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1083240113, now seen corresponding path program 1 times [2024-10-13 22:40:39,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:40:39,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728474951] [2024-10-13 22:40:39,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:40:39,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:40:39,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:40:39,809 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-13 22:40:39,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:40:39,810 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-13 22:40:39,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:40:40,068 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-10-13 22:40:40,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:40:40,071 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2024-10-13 22:40:40,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:40:40,073 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 3 proven. 293 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-10-13 22:40:40,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:40:40,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728474951] [2024-10-13 22:40:40,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728474951] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:40:40,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503818706] [2024-10-13 22:40:40,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:40:40,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:40:40,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:40:40,075 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 22:40:40,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-10-13 22:40:40,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:40:40,225 INFO L255 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 105 conjuncts are in the unsatisfiable core [2024-10-13 22:40:40,227 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:40:41,901 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 9 proven. 289 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-10-13 22:40:41,901 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:40:45,356 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 26 proven. 288 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-13 22:40:45,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503818706] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:40:45,357 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:40:45,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 35, 40] total 89 [2024-10-13 22:40:45,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385436305] [2024-10-13 22:40:45,357 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:40:45,357 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2024-10-13 22:40:45,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:40:45,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2024-10-13 22:40:45,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=7331, Unknown=0, NotChecked=0, Total=7832 [2024-10-13 22:40:45,359 INFO L87 Difference]: Start difference. First operand 335 states and 554 transitions. Second operand has 89 states, 80 states have (on average 3.175) internal successors, (254), 83 states have internal predecessors, (254), 7 states have call successors, (11), 2 states have call predecessors, (11), 7 states have return successors, (11), 9 states have call predecessors, (11), 7 states have call successors, (11)