./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 a046e57d 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-tmp.dk.eval-mul-div-a046e57-m [2024-10-12 15:11:25,570 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-12 15:11:25,627 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-12 15:11:25,634 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-12 15:11:25,634 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-12 15:11:25,661 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-12 15:11:25,663 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-12 15:11:25,663 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-12 15:11:25,664 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-12 15:11:25,665 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-12 15:11:25,666 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-12 15:11:25,666 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-12 15:11:25,667 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-12 15:11:25,667 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-12 15:11:25,667 INFO L153 SettingsManager]: * Use SBE=true [2024-10-12 15:11:25,667 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-12 15:11:25,667 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-12 15:11:25,668 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-12 15:11:25,668 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-12 15:11:25,668 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-12 15:11:25,671 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-12 15:11:25,671 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-12 15:11:25,671 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-12 15:11:25,671 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-12 15:11:25,672 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-12 15:11:25,672 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-12 15:11:25,672 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-12 15:11:25,673 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-12 15:11:25,673 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-12 15:11:25,673 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-12 15:11:25,674 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-12 15:11:25,674 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-12 15:11:25,674 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-12 15:11:25,675 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-12 15:11:25,675 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-12 15:11:25,675 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-12 15:11:25,675 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-12 15:11:25,676 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-12 15:11:25,676 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-12 15:11:25,676 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-12 15:11:25,676 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-12 15:11:25,676 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-12 15:11:25,677 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 95f89ee6bcff8f17eb3e93b344abecdfb8ddea0894d1b25afafccf6235d7ced6 [2024-10-12 15:11:25,893 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-12 15:11:25,913 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-12 15:11:25,916 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-12 15:11:25,917 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-12 15:11:25,917 INFO L274 PluginConnector]: CDTParser initialized [2024-10-12 15:11:25,918 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/soft_float_3a.c.cil.c [2024-10-12 15:11:27,178 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-12 15:11:27,335 INFO L384 CDTParser]: Found 1 translation units. [2024-10-12 15:11:27,338 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/soft_float_3a.c.cil.c [2024-10-12 15:11:27,348 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a88b65136/9a7d4eeeca2a4ae6a48f2f1147d6caca/FLAG40f846458 [2024-10-12 15:11:27,361 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a88b65136/9a7d4eeeca2a4ae6a48f2f1147d6caca [2024-10-12 15:11:27,363 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-12 15:11:27,365 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-12 15:11:27,366 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-12 15:11:27,367 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-12 15:11:27,371 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-12 15:11:27,372 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 03:11:27" (1/1) ... [2024-10-12 15:11:27,373 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44ae48a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:11:27, skipping insertion in model container [2024-10-12 15:11:27,373 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 03:11:27" (1/1) ... [2024-10-12 15:11:27,398 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-12 15:11:27,543 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] [2024-10-12 15:11:27,575 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-12 15:11:27,588 INFO L200 MainTranslator]: Completed pre-run [2024-10-12 15:11:27,596 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] [2024-10-12 15:11:27,624 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-12 15:11:27,637 INFO L204 MainTranslator]: Completed translation [2024-10-12 15:11:27,637 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:11:27 WrapperNode [2024-10-12 15:11:27,637 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-12 15:11:27,638 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-12 15:11:27,638 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-12 15:11:27,638 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-12 15:11:27,644 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:11:27" (1/1) ... [2024-10-12 15:11:27,650 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:11:27" (1/1) ... [2024-10-12 15:11:27,667 INFO L138 Inliner]: procedures = 17, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 147 [2024-10-12 15:11:27,667 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-12 15:11:27,668 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-12 15:11:27,668 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-12 15:11:27,668 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-12 15:11:27,680 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:11:27" (1/1) ... [2024-10-12 15:11:27,680 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:11:27" (1/1) ... [2024-10-12 15:11:27,682 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:11:27" (1/1) ... [2024-10-12 15:11:27,693 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]. [2024-10-12 15:11:27,693 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:11:27" (1/1) ... [2024-10-12 15:11:27,693 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:11:27" (1/1) ... [2024-10-12 15:11:27,696 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:11:27" (1/1) ... [2024-10-12 15:11:27,700 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:11:27" (1/1) ... [2024-10-12 15:11:27,701 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:11:27" (1/1) ... [2024-10-12 15:11:27,702 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:11:27" (1/1) ... [2024-10-12 15:11:27,704 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-12 15:11:27,704 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-12 15:11:27,704 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-12 15:11:27,704 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-12 15:11:27,705 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:11:27" (1/1) ... [2024-10-12 15:11:27,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-12 15:11:27,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:11:27,734 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) [2024-10-12 15:11:27,737 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 [2024-10-12 15:11:27,770 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-12 15:11:27,770 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-12 15:11:27,771 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2024-10-12 15:11:27,771 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2024-10-12 15:11:27,771 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-12 15:11:27,771 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-12 15:11:27,771 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-10-12 15:11:27,771 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-10-12 15:11:27,826 INFO L238 CfgBuilder]: Building ICFG [2024-10-12 15:11:27,828 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-12 15:11:28,081 INFO L? ?]: Removed 66 outVars from TransFormulas that were not future-live. [2024-10-12 15:11:28,082 INFO L287 CfgBuilder]: Performing block encoding [2024-10-12 15:11:28,113 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-12 15:11:28,113 INFO L314 CfgBuilder]: Removed 2 assume(true) statements. [2024-10-12 15:11:28,113 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 03:11:28 BoogieIcfgContainer [2024-10-12 15:11:28,114 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-12 15:11:28,115 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-12 15:11:28,115 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-12 15:11:28,118 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-12 15:11:28,119 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 03:11:27" (1/3) ... [2024-10-12 15:11:28,119 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5251d0d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 03:11:28, skipping insertion in model container [2024-10-12 15:11:28,120 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:11:27" (2/3) ... [2024-10-12 15:11:28,120 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5251d0d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 03:11:28, skipping insertion in model container [2024-10-12 15:11:28,120 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 03:11:28" (3/3) ... [2024-10-12 15:11:28,122 INFO L112 eAbstractionObserver]: Analyzing ICFG soft_float_3a.c.cil.c [2024-10-12 15:11:28,136 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-12 15:11:28,137 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-12 15:11:28,191 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-12 15:11:28,196 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;@2b9475ce, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-12 15:11:28,198 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-12 15:11:28,202 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) [2024-10-12 15:11:28,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-10-12 15:11:28,210 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:11:28,210 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] [2024-10-12 15:11:28,211 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:11:28,214 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:11:28,215 INFO L85 PathProgramCache]: Analyzing trace with hash -1468865357, now seen corresponding path program 1 times [2024-10-12 15:11:28,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:11:28,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421343293] [2024-10-12 15:11:28,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:11:28,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:11:28,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:28,448 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-12 15:11:28,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:28,454 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-12 15:11:28,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:28,459 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-10-12 15:11:28,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:28,464 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-12 15:11:28,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:28,470 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-10-12 15:11:28,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:11:28,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421343293] [2024-10-12 15:11:28,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421343293] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 15:11:28,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 15:11:28,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-12 15:11:28,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992296884] [2024-10-12 15:11:28,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 15:11:28,476 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-12 15:11:28,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:11:28,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-12 15:11:28,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-12 15:11:28,525 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) [2024-10-12 15:11:28,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:11:28,597 INFO L93 Difference]: Finished difference Result 137 states and 216 transitions. [2024-10-12 15:11:28,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-12 15:11:28,601 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 [2024-10-12 15:11:28,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:11:28,609 INFO L225 Difference]: With dead ends: 137 [2024-10-12 15:11:28,609 INFO L226 Difference]: Without dead ends: 65 [2024-10-12 15:11:28,613 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 [2024-10-12 15:11:28,617 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 [2024-10-12 15:11:28,618 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] [2024-10-12 15:11:28,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2024-10-12 15:11:28,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2024-10-12 15:11:28,644 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) [2024-10-12 15:11:28,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 93 transitions. [2024-10-12 15:11:28,647 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 93 transitions. Word has length 35 [2024-10-12 15:11:28,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:11:28,648 INFO L471 AbstractCegarLoop]: Abstraction has 65 states and 93 transitions. [2024-10-12 15:11:28,649 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) [2024-10-12 15:11:28,649 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 93 transitions. [2024-10-12 15:11:28,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-10-12 15:11:28,650 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:11:28,650 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] [2024-10-12 15:11:28,651 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-12 15:11:28,651 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:11:28,651 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:11:28,651 INFO L85 PathProgramCache]: Analyzing trace with hash -2021311367, now seen corresponding path program 1 times [2024-10-12 15:11:28,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:11:28,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247953952] [2024-10-12 15:11:28,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:11:28,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:11:28,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:28,775 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-12 15:11:28,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:28,781 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-12 15:11:28,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:28,788 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-10-12 15:11:28,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:28,794 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-12 15:11:28,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:28,800 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-10-12 15:11:28,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:11:28,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247953952] [2024-10-12 15:11:28,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247953952] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 15:11:28,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 15:11:28,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-12 15:11:28,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338150623] [2024-10-12 15:11:28,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 15:11:28,803 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-12 15:11:28,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:11:28,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-12 15:11:28,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-12 15:11:28,806 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) [2024-10-12 15:11:28,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:11:28,833 INFO L93 Difference]: Finished difference Result 75 states and 104 transitions. [2024-10-12 15:11:28,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-12 15:11:28,836 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 [2024-10-12 15:11:28,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:11:28,836 INFO L225 Difference]: With dead ends: 75 [2024-10-12 15:11:28,837 INFO L226 Difference]: Without dead ends: 65 [2024-10-12 15:11:28,837 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 [2024-10-12 15:11:28,838 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 [2024-10-12 15:11:28,838 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] [2024-10-12 15:11:28,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2024-10-12 15:11:28,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2024-10-12 15:11:28,845 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) [2024-10-12 15:11:28,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 92 transitions. [2024-10-12 15:11:28,847 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 92 transitions. Word has length 37 [2024-10-12 15:11:28,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:11:28,847 INFO L471 AbstractCegarLoop]: Abstraction has 65 states and 92 transitions. [2024-10-12 15:11:28,848 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) [2024-10-12 15:11:28,848 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 92 transitions. [2024-10-12 15:11:28,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-10-12 15:11:28,849 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:11:28,849 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] [2024-10-12 15:11:28,849 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-12 15:11:28,849 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:11:28,850 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:11:28,850 INFO L85 PathProgramCache]: Analyzing trace with hash 1464309303, now seen corresponding path program 1 times [2024-10-12 15:11:28,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:11:28,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136852562] [2024-10-12 15:11:28,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:11:28,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:11:28,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:28,909 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-12 15:11:28,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:28,915 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-12 15:11:28,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:28,961 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-10-12 15:11:28,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:28,965 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-12 15:11:28,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:28,972 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-12 15:11:28,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:11:28,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136852562] [2024-10-12 15:11:28,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136852562] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 15:11:28,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782423319] [2024-10-12 15:11:28,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:11:28,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:11:28,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:11:28,979 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) [2024-10-12 15:11:28,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-12 15:11:29,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:29,056 INFO L255 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-12 15:11:29,060 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 15:11:29,093 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-12 15:11:29,093 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-12 15:11:29,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782423319] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 15:11:29,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-12 15:11:29,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2024-10-12 15:11:29,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479074429] [2024-10-12 15:11:29,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 15:11:29,094 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-12 15:11:29,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:11:29,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-12 15:11:29,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-12 15:11:29,095 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) [2024-10-12 15:11:29,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:11:29,207 INFO L93 Difference]: Finished difference Result 147 states and 213 transitions. [2024-10-12 15:11:29,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-12 15:11:29,207 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 [2024-10-12 15:11:29,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:11:29,209 INFO L225 Difference]: With dead ends: 147 [2024-10-12 15:11:29,209 INFO L226 Difference]: Without dead ends: 84 [2024-10-12 15:11:29,210 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 [2024-10-12 15:11:29,211 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 [2024-10-12 15:11:29,211 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] [2024-10-12 15:11:29,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2024-10-12 15:11:29,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 77. [2024-10-12 15:11:29,217 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) [2024-10-12 15:11:29,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 109 transitions. [2024-10-12 15:11:29,218 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 109 transitions. Word has length 37 [2024-10-12 15:11:29,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:11:29,218 INFO L471 AbstractCegarLoop]: Abstraction has 77 states and 109 transitions. [2024-10-12 15:11:29,219 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) [2024-10-12 15:11:29,219 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 109 transitions. [2024-10-12 15:11:29,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-10-12 15:11:29,220 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:11:29,220 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] [2024-10-12 15:11:29,235 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-12 15:11:29,420 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 [2024-10-12 15:11:29,421 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:11:29,421 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:11:29,421 INFO L85 PathProgramCache]: Analyzing trace with hash 1955471931, now seen corresponding path program 1 times [2024-10-12 15:11:29,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:11:29,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887097570] [2024-10-12 15:11:29,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:11:29,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:11:29,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:29,487 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-12 15:11:29,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:29,492 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-12 15:11:29,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:29,523 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-12 15:11:29,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:29,529 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-10-12 15:11:29,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:29,532 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-12 15:11:29,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:11:29,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887097570] [2024-10-12 15:11:29,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887097570] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 15:11:29,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697033912] [2024-10-12 15:11:29,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:11:29,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:11:29,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:11:29,535 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) [2024-10-12 15:11:29,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-12 15:11:29,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:29,599 INFO L255 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-12 15:11:29,601 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 15:11:29,673 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-12 15:11:29,678 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-12 15:11:29,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697033912] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 15:11:29,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-12 15:11:29,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2024-10-12 15:11:29,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114274126] [2024-10-12 15:11:29,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 15:11:29,679 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-12 15:11:29,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:11:29,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-12 15:11:29,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-10-12 15:11:29,680 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) [2024-10-12 15:11:29,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:11:29,780 INFO L93 Difference]: Finished difference Result 161 states and 231 transitions. [2024-10-12 15:11:29,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-12 15:11:29,781 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 [2024-10-12 15:11:29,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:11:29,783 INFO L225 Difference]: With dead ends: 161 [2024-10-12 15:11:29,784 INFO L226 Difference]: Without dead ends: 90 [2024-10-12 15:11:29,785 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 [2024-10-12 15:11:29,785 INFO L432 NwaCegarLoop]: 77 mSDtfsCounter, 14 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 15:11:29,787 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 215 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 15:11:29,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2024-10-12 15:11:29,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 81. [2024-10-12 15:11:29,799 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) [2024-10-12 15:11:29,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 115 transitions. [2024-10-12 15:11:29,800 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 115 transitions. Word has length 40 [2024-10-12 15:11:29,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:11:29,800 INFO L471 AbstractCegarLoop]: Abstraction has 81 states and 115 transitions. [2024-10-12 15:11:29,801 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) [2024-10-12 15:11:29,801 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 115 transitions. [2024-10-12 15:11:29,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-10-12 15:11:29,802 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:11:29,802 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] [2024-10-12 15:11:29,817 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-12 15:11:30,002 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 [2024-10-12 15:11:30,003 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:11:30,003 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:11:30,003 INFO L85 PathProgramCache]: Analyzing trace with hash -2063349722, now seen corresponding path program 1 times [2024-10-12 15:11:30,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:11:30,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53788219] [2024-10-12 15:11:30,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:11:30,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:11:30,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:30,057 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-12 15:11:30,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:30,061 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-12 15:11:30,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:30,096 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-10-12 15:11:30,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:30,099 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-10-12 15:11:30,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:30,102 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-12 15:11:30,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:11:30,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53788219] [2024-10-12 15:11:30,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53788219] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 15:11:30,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810900024] [2024-10-12 15:11:30,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:11:30,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:11:30,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:11:30,105 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) [2024-10-12 15:11:30,106 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-12 15:11:30,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:30,160 INFO L255 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-12 15:11:30,161 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 15:11:30,192 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-12 15:11:30,194 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-12 15:11:30,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810900024] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 15:11:30,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-12 15:11:30,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2024-10-12 15:11:30,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969697640] [2024-10-12 15:11:30,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 15:11:30,196 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-12 15:11:30,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:11:30,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-12 15:11:30,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-10-12 15:11:30,199 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) [2024-10-12 15:11:30,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:11:30,261 INFO L93 Difference]: Finished difference Result 166 states and 239 transitions. [2024-10-12 15:11:30,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-12 15:11:30,262 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 [2024-10-12 15:11:30,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:11:30,263 INFO L225 Difference]: With dead ends: 166 [2024-10-12 15:11:30,263 INFO L226 Difference]: Without dead ends: 91 [2024-10-12 15:11:30,264 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 [2024-10-12 15:11:30,264 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, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 15:11:30,264 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 215 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 15:11:30,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2024-10-12 15:11:30,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 82. [2024-10-12 15:11:30,277 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) [2024-10-12 15:11:30,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 117 transitions. [2024-10-12 15:11:30,278 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 117 transitions. Word has length 41 [2024-10-12 15:11:30,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:11:30,279 INFO L471 AbstractCegarLoop]: Abstraction has 82 states and 117 transitions. [2024-10-12 15:11:30,279 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) [2024-10-12 15:11:30,279 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 117 transitions. [2024-10-12 15:11:30,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-10-12 15:11:30,280 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:11:30,280 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] [2024-10-12 15:11:30,292 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-10-12 15:11:30,480 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 [2024-10-12 15:11:30,481 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:11:30,481 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:11:30,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1431435493, now seen corresponding path program 1 times [2024-10-12 15:11:30,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:11:30,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727960684] [2024-10-12 15:11:30,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:11:30,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:11:30,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:30,523 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-12 15:11:30,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:30,527 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-12 15:11:30,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:30,569 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-12 15:11:30,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:30,571 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-10-12 15:11:30,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:30,576 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-12 15:11:30,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:11:30,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727960684] [2024-10-12 15:11:30,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727960684] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 15:11:30,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081260617] [2024-10-12 15:11:30,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:11:30,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:11:30,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:11:30,581 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) [2024-10-12 15:11:30,582 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-12 15:11:30,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:30,634 INFO L255 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-12 15:11:30,636 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 15:11:30,671 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-12 15:11:30,672 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 15:11:30,777 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-12 15:11:30,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081260617] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 15:11:30,777 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 15:11:30,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2024-10-12 15:11:30,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047318039] [2024-10-12 15:11:30,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 15:11:30,777 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-12 15:11:30,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:11:30,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-12 15:11:30,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2024-10-12 15:11:30,778 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) [2024-10-12 15:11:30,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:11:30,879 INFO L93 Difference]: Finished difference Result 213 states and 314 transitions. [2024-10-12 15:11:30,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-12 15:11:30,879 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 [2024-10-12 15:11:30,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:11:30,881 INFO L225 Difference]: With dead ends: 213 [2024-10-12 15:11:30,881 INFO L226 Difference]: Without dead ends: 137 [2024-10-12 15:11:30,881 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 [2024-10-12 15:11:30,882 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 [2024-10-12 15:11:30,882 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] [2024-10-12 15:11:30,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2024-10-12 15:11:30,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 96. [2024-10-12 15:11:30,892 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) [2024-10-12 15:11:30,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 140 transitions. [2024-10-12 15:11:30,892 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 140 transitions. Word has length 43 [2024-10-12 15:11:30,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:11:30,893 INFO L471 AbstractCegarLoop]: Abstraction has 96 states and 140 transitions. [2024-10-12 15:11:30,893 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) [2024-10-12 15:11:30,893 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 140 transitions. [2024-10-12 15:11:30,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-10-12 15:11:30,894 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:11:30,894 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] [2024-10-12 15:11:30,909 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-12 15:11:31,094 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 [2024-10-12 15:11:31,095 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:11:31,095 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:11:31,095 INFO L85 PathProgramCache]: Analyzing trace with hash -1122099289, now seen corresponding path program 1 times [2024-10-12 15:11:31,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:11:31,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131292752] [2024-10-12 15:11:31,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:11:31,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:11:31,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:31,133 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-12 15:11:31,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:31,135 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-12 15:11:31,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:31,173 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-12 15:11:31,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:31,176 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-10-12 15:11:31,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:31,179 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-12 15:11:31,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:11:31,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131292752] [2024-10-12 15:11:31,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131292752] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 15:11:31,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575001195] [2024-10-12 15:11:31,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:11:31,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:11:31,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:11:31,182 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) [2024-10-12 15:11:31,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-12 15:11:31,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:31,242 INFO L255 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-12 15:11:31,243 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 15:11:31,284 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 19 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-12 15:11:31,285 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 15:11:31,367 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-12 15:11:31,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575001195] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 15:11:31,367 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 15:11:31,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2024-10-12 15:11:31,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209271615] [2024-10-12 15:11:31,368 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 15:11:31,368 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-12 15:11:31,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:11:31,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-12 15:11:31,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2024-10-12 15:11:31,369 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) [2024-10-12 15:11:31,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:11:31,471 INFO L93 Difference]: Finished difference Result 233 states and 347 transitions. [2024-10-12 15:11:31,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-12 15:11:31,471 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 [2024-10-12 15:11:31,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:11:31,472 INFO L225 Difference]: With dead ends: 233 [2024-10-12 15:11:31,472 INFO L226 Difference]: Without dead ends: 143 [2024-10-12 15:11:31,473 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2024-10-12 15:11:31,473 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 [2024-10-12 15:11:31,474 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] [2024-10-12 15:11:31,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2024-10-12 15:11:31,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 105. [2024-10-12 15:11:31,480 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) [2024-10-12 15:11:31,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 155 transitions. [2024-10-12 15:11:31,481 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 155 transitions. Word has length 44 [2024-10-12 15:11:31,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:11:31,481 INFO L471 AbstractCegarLoop]: Abstraction has 105 states and 155 transitions. [2024-10-12 15:11:31,481 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) [2024-10-12 15:11:31,481 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 155 transitions. [2024-10-12 15:11:31,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-10-12 15:11:31,482 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:11:31,482 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] [2024-10-12 15:11:31,495 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-10-12 15:11:31,682 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 [2024-10-12 15:11:31,683 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:11:31,683 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:11:31,683 INFO L85 PathProgramCache]: Analyzing trace with hash -1504596689, now seen corresponding path program 1 times [2024-10-12 15:11:31,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:11:31,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551564368] [2024-10-12 15:11:31,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:11:31,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:11:31,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:31,714 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-12 15:11:31,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:31,716 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-12 15:11:31,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:31,732 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-10-12 15:11:31,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:31,735 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-10-12 15:11:31,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:31,737 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-10-12 15:11:31,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:11:31,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551564368] [2024-10-12 15:11:31,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551564368] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 15:11:31,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70373502] [2024-10-12 15:11:31,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:11:31,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:11:31,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:11:31,738 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) [2024-10-12 15:11:31,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-12 15:11:31,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:31,786 INFO L255 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-12 15:11:31,787 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 15:11:31,798 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-12 15:11:31,798 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-12 15:11:31,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70373502] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 15:11:31,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-12 15:11:31,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 3 [2024-10-12 15:11:31,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986366853] [2024-10-12 15:11:31,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 15:11:31,799 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-12 15:11:31,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:11:31,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-12 15:11:31,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-12 15:11:31,799 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) [2024-10-12 15:11:31,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:11:31,836 INFO L93 Difference]: Finished difference Result 211 states and 319 transitions. [2024-10-12 15:11:31,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-12 15:11:31,837 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 [2024-10-12 15:11:31,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:11:31,838 INFO L225 Difference]: With dead ends: 211 [2024-10-12 15:11:31,838 INFO L226 Difference]: Without dead ends: 112 [2024-10-12 15:11:31,838 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 [2024-10-12 15:11:31,839 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 [2024-10-12 15:11:31,839 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] [2024-10-12 15:11:31,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2024-10-12 15:11:31,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 107. [2024-10-12 15:11:31,845 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) [2024-10-12 15:11:31,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 157 transitions. [2024-10-12 15:11:31,846 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 157 transitions. Word has length 45 [2024-10-12 15:11:31,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:11:31,846 INFO L471 AbstractCegarLoop]: Abstraction has 107 states and 157 transitions. [2024-10-12 15:11:31,846 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) [2024-10-12 15:11:31,846 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 157 transitions. [2024-10-12 15:11:31,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-10-12 15:11:31,847 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:11:31,847 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] [2024-10-12 15:11:31,862 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-12 15:11:32,047 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 [2024-10-12 15:11:32,049 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:11:32,049 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:11:32,049 INFO L85 PathProgramCache]: Analyzing trace with hash 805735315, now seen corresponding path program 1 times [2024-10-12 15:11:32,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:11:32,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432870679] [2024-10-12 15:11:32,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:11:32,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:11:32,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:32,071 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-12 15:11:32,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:32,075 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-12 15:11:32,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:32,089 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-10-12 15:11:32,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:32,096 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-10-12 15:11:32,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:32,098 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-10-12 15:11:32,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:11:32,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432870679] [2024-10-12 15:11:32,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432870679] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 15:11:32,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267264337] [2024-10-12 15:11:32,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:11:32,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:11:32,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:11:32,102 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) [2024-10-12 15:11:32,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-12 15:11:32,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:32,154 INFO L255 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-12 15:11:32,155 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 15:11:32,160 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-12 15:11:32,160 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-12 15:11:32,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267264337] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 15:11:32,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-12 15:11:32,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 3 [2024-10-12 15:11:32,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077644386] [2024-10-12 15:11:32,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 15:11:32,161 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-12 15:11:32,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:11:32,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-12 15:11:32,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-12 15:11:32,161 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) [2024-10-12 15:11:32,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:11:32,202 INFO L93 Difference]: Finished difference Result 209 states and 313 transitions. [2024-10-12 15:11:32,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-12 15:11:32,202 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 [2024-10-12 15:11:32,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:11:32,203 INFO L225 Difference]: With dead ends: 209 [2024-10-12 15:11:32,203 INFO L226 Difference]: Without dead ends: 108 [2024-10-12 15:11:32,203 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-12 15:11:32,204 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 [2024-10-12 15:11:32,204 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] [2024-10-12 15:11:32,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2024-10-12 15:11:32,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 103. [2024-10-12 15:11:32,209 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) [2024-10-12 15:11:32,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 149 transitions. [2024-10-12 15:11:32,210 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 149 transitions. Word has length 45 [2024-10-12 15:11:32,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:11:32,210 INFO L471 AbstractCegarLoop]: Abstraction has 103 states and 149 transitions. [2024-10-12 15:11:32,211 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) [2024-10-12 15:11:32,211 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 149 transitions. [2024-10-12 15:11:32,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-10-12 15:11:32,211 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:11:32,211 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] [2024-10-12 15:11:32,224 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-12 15:11:32,415 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 [2024-10-12 15:11:32,416 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:11:32,416 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:11:32,416 INFO L85 PathProgramCache]: Analyzing trace with hash -1725921874, now seen corresponding path program 1 times [2024-10-12 15:11:32,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:11:32,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851742328] [2024-10-12 15:11:32,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:11:32,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:11:32,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:32,469 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-12 15:11:32,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:32,471 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-12 15:11:32,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:32,531 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-10-12 15:11:32,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:32,533 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-10-12 15:11:32,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:32,535 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-12 15:11:32,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:11:32,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851742328] [2024-10-12 15:11:32,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851742328] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 15:11:32,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304903818] [2024-10-12 15:11:32,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:11:32,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:11:32,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:11:32,538 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) [2024-10-12 15:11:32,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-12 15:11:32,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:32,587 INFO L255 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-12 15:11:32,588 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 15:11:32,622 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-10-12 15:11:32,623 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 15:11:32,702 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-10-12 15:11:32,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304903818] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 15:11:32,703 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 15:11:32,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 13 [2024-10-12 15:11:32,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054031846] [2024-10-12 15:11:32,703 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 15:11:32,703 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-12 15:11:32,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:11:32,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-12 15:11:32,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2024-10-12 15:11:32,704 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) [2024-10-12 15:11:32,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:11:32,880 INFO L93 Difference]: Finished difference Result 250 states and 372 transitions. [2024-10-12 15:11:32,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-12 15:11:32,881 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 [2024-10-12 15:11:32,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:11:32,882 INFO L225 Difference]: With dead ends: 250 [2024-10-12 15:11:32,882 INFO L226 Difference]: Without dead ends: 153 [2024-10-12 15:11:32,883 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 [2024-10-12 15:11:32,883 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 [2024-10-12 15:11:32,883 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] [2024-10-12 15:11:32,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2024-10-12 15:11:32,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 130. [2024-10-12 15:11:32,890 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) [2024-10-12 15:11:32,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 190 transitions. [2024-10-12 15:11:32,891 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 190 transitions. Word has length 46 [2024-10-12 15:11:32,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:11:32,891 INFO L471 AbstractCegarLoop]: Abstraction has 130 states and 190 transitions. [2024-10-12 15:11:32,891 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) [2024-10-12 15:11:32,892 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 190 transitions. [2024-10-12 15:11:32,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-10-12 15:11:32,892 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:11:32,892 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] [2024-10-12 15:11:32,906 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-10-12 15:11:33,093 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 [2024-10-12 15:11:33,093 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:11:33,094 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:11:33,094 INFO L85 PathProgramCache]: Analyzing trace with hash -1721146227, now seen corresponding path program 1 times [2024-10-12 15:11:33,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:11:33,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445019998] [2024-10-12 15:11:33,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:11:33,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:11:33,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:33,125 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-12 15:11:33,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:33,127 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-12 15:11:33,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:33,163 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-10-12 15:11:33,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:33,165 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-10-12 15:11:33,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:33,166 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-10-12 15:11:33,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:11:33,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445019998] [2024-10-12 15:11:33,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445019998] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 15:11:33,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657304689] [2024-10-12 15:11:33,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:11:33,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:11:33,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:11:33,168 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) [2024-10-12 15:11:33,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-12 15:11:33,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:33,219 INFO L255 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-12 15:11:33,222 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 15:11:33,260 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-12 15:11:33,261 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-12 15:11:33,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657304689] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 15:11:33,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-12 15:11:33,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2024-10-12 15:11:33,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496657410] [2024-10-12 15:11:33,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 15:11:33,262 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-12 15:11:33,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:11:33,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-12 15:11:33,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-12 15:11:33,263 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) [2024-10-12 15:11:33,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:11:33,294 INFO L93 Difference]: Finished difference Result 256 states and 379 transitions. [2024-10-12 15:11:33,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-12 15:11:33,295 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 [2024-10-12 15:11:33,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:11:33,296 INFO L225 Difference]: With dead ends: 256 [2024-10-12 15:11:33,296 INFO L226 Difference]: Without dead ends: 132 [2024-10-12 15:11:33,297 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 [2024-10-12 15:11:33,297 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 [2024-10-12 15:11:33,297 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] [2024-10-12 15:11:33,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2024-10-12 15:11:33,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 130. [2024-10-12 15:11:33,304 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) [2024-10-12 15:11:33,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 189 transitions. [2024-10-12 15:11:33,305 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 189 transitions. Word has length 48 [2024-10-12 15:11:33,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:11:33,305 INFO L471 AbstractCegarLoop]: Abstraction has 130 states and 189 transitions. [2024-10-12 15:11:33,305 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) [2024-10-12 15:11:33,306 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 189 transitions. [2024-10-12 15:11:33,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-10-12 15:11:33,306 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:11:33,306 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] [2024-10-12 15:11:33,319 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-10-12 15:11:33,506 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 [2024-10-12 15:11:33,507 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:11:33,507 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:11:33,507 INFO L85 PathProgramCache]: Analyzing trace with hash -283089764, now seen corresponding path program 1 times [2024-10-12 15:11:33,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:11:33,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471994986] [2024-10-12 15:11:33,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:11:33,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:11:33,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:33,625 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-12 15:11:33,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:33,627 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-12 15:11:33,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:33,631 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-10-12 15:11:33,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:33,653 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-10-12 15:11:33,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:33,665 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-12 15:11:33,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:11:33,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471994986] [2024-10-12 15:11:33,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471994986] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 15:11:33,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 15:11:33,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-10-12 15:11:33,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239020283] [2024-10-12 15:11:33,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 15:11:33,666 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-12 15:11:33,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:11:33,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-12 15:11:33,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-10-12 15:11:33,666 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) [2024-10-12 15:11:33,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:11:33,732 INFO L93 Difference]: Finished difference Result 170 states and 244 transitions. [2024-10-12 15:11:33,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-12 15:11:33,734 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 [2024-10-12 15:11:33,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:11:33,735 INFO L225 Difference]: With dead ends: 170 [2024-10-12 15:11:33,735 INFO L226 Difference]: Without dead ends: 134 [2024-10-12 15:11:33,735 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 [2024-10-12 15:11:33,736 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 [2024-10-12 15:11:33,736 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] [2024-10-12 15:11:33,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2024-10-12 15:11:33,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 133. [2024-10-12 15:11:33,744 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) [2024-10-12 15:11:33,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 192 transitions. [2024-10-12 15:11:33,745 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 192 transitions. Word has length 49 [2024-10-12 15:11:33,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:11:33,745 INFO L471 AbstractCegarLoop]: Abstraction has 133 states and 192 transitions. [2024-10-12 15:11:33,745 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) [2024-10-12 15:11:33,745 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 192 transitions. [2024-10-12 15:11:33,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-10-12 15:11:33,746 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:11:33,747 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] [2024-10-12 15:11:33,747 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-10-12 15:11:33,747 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:11:33,747 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:11:33,747 INFO L85 PathProgramCache]: Analyzing trace with hash -1294207014, now seen corresponding path program 1 times [2024-10-12 15:11:33,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:11:33,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133948855] [2024-10-12 15:11:33,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:11:33,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:11:33,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:33,850 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-12 15:11:33,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:33,852 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-12 15:11:33,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:33,860 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-10-12 15:11:33,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:33,881 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-10-12 15:11:33,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:33,884 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-10-12 15:11:33,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:11:33,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133948855] [2024-10-12 15:11:33,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133948855] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 15:11:33,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102615430] [2024-10-12 15:11:33,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:11:33,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:11:33,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:11:33,886 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) [2024-10-12 15:11:33,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-12 15:11:33,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:33,936 INFO L255 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-12 15:11:33,937 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 15:11:33,963 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-10-12 15:11:33,963 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 15:11:34,009 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-10-12 15:11:34,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102615430] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-12 15:11:34,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-10-12 15:11:34,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8, 8] total 10 [2024-10-12 15:11:34,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086565366] [2024-10-12 15:11:34,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 15:11:34,010 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-12 15:11:34,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:11:34,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-12 15:11:34,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-10-12 15:11:34,010 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) [2024-10-12 15:11:34,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:11:34,038 INFO L93 Difference]: Finished difference Result 152 states and 212 transitions. [2024-10-12 15:11:34,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-12 15:11:34,038 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 [2024-10-12 15:11:34,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:11:34,039 INFO L225 Difference]: With dead ends: 152 [2024-10-12 15:11:34,039 INFO L226 Difference]: Without dead ends: 146 [2024-10-12 15:11:34,039 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 [2024-10-12 15:11:34,040 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 [2024-10-12 15:11:34,040 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] [2024-10-12 15:11:34,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2024-10-12 15:11:34,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2024-10-12 15:11:34,048 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) [2024-10-12 15:11:34,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 206 transitions. [2024-10-12 15:11:34,049 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 206 transitions. Word has length 49 [2024-10-12 15:11:34,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:11:34,050 INFO L471 AbstractCegarLoop]: Abstraction has 146 states and 206 transitions. [2024-10-12 15:11:34,050 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) [2024-10-12 15:11:34,050 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 206 transitions. [2024-10-12 15:11:34,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-10-12 15:11:34,051 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:11:34,051 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] [2024-10-12 15:11:34,067 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-10-12 15:11:34,255 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 [2024-10-12 15:11:34,256 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:11:34,256 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:11:34,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1236948712, now seen corresponding path program 1 times [2024-10-12 15:11:34,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:11:34,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611677260] [2024-10-12 15:11:34,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:11:34,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:11:34,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:34,332 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-12 15:11:34,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:34,339 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-12 15:11:34,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:34,345 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-10-12 15:11:34,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:34,347 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-10-12 15:11:34,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:34,348 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-10-12 15:11:34,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:11:34,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611677260] [2024-10-12 15:11:34,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611677260] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 15:11:34,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 15:11:34,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-12 15:11:34,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027146443] [2024-10-12 15:11:34,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 15:11:34,349 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-12 15:11:34,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:11:34,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-12 15:11:34,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-10-12 15:11:34,350 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) [2024-10-12 15:11:34,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:11:34,381 INFO L93 Difference]: Finished difference Result 152 states and 211 transitions. [2024-10-12 15:11:34,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-12 15:11:34,381 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 [2024-10-12 15:11:34,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:11:34,382 INFO L225 Difference]: With dead ends: 152 [2024-10-12 15:11:34,382 INFO L226 Difference]: Without dead ends: 136 [2024-10-12 15:11:34,383 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 [2024-10-12 15:11:34,383 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 [2024-10-12 15:11:34,383 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] [2024-10-12 15:11:34,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2024-10-12 15:11:34,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2024-10-12 15:11:34,389 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) [2024-10-12 15:11:34,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 189 transitions. [2024-10-12 15:11:34,390 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 189 transitions. Word has length 49 [2024-10-12 15:11:34,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:11:34,390 INFO L471 AbstractCegarLoop]: Abstraction has 136 states and 189 transitions. [2024-10-12 15:11:34,390 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) [2024-10-12 15:11:34,390 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 189 transitions. [2024-10-12 15:11:34,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-10-12 15:11:34,391 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:11:34,391 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] [2024-10-12 15:11:34,391 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-10-12 15:11:34,391 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:11:34,391 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:11:34,391 INFO L85 PathProgramCache]: Analyzing trace with hash 1163058693, now seen corresponding path program 1 times [2024-10-12 15:11:34,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:11:34,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312626656] [2024-10-12 15:11:34,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:11:34,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:11:34,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:34,479 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-12 15:11:34,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:34,481 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-12 15:11:34,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:34,486 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-10-12 15:11:34,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:34,511 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-10-12 15:11:34,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:34,514 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-10-12 15:11:34,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:11:34,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312626656] [2024-10-12 15:11:34,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312626656] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 15:11:34,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387860101] [2024-10-12 15:11:34,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:11:34,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:11:34,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:11:34,517 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) [2024-10-12 15:11:34,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-12 15:11:34,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:34,574 INFO L255 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-10-12 15:11:34,576 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 15:11:34,601 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-10-12 15:11:34,602 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 15:11:34,676 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-10-12 15:11:34,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387860101] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-12 15:11:34,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-10-12 15:11:34,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 12 [2024-10-12 15:11:34,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348218377] [2024-10-12 15:11:34,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 15:11:34,677 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-12 15:11:34,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:11:34,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-12 15:11:34,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-10-12 15:11:34,678 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) [2024-10-12 15:11:34,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:11:34,722 INFO L93 Difference]: Finished difference Result 150 states and 203 transitions. [2024-10-12 15:11:34,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-12 15:11:34,723 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 [2024-10-12 15:11:34,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:11:34,723 INFO L225 Difference]: With dead ends: 150 [2024-10-12 15:11:34,723 INFO L226 Difference]: Without dead ends: 139 [2024-10-12 15:11:34,724 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 [2024-10-12 15:11:34,724 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 [2024-10-12 15:11:34,724 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] [2024-10-12 15:11:34,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2024-10-12 15:11:34,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 137. [2024-10-12 15:11:34,730 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) [2024-10-12 15:11:34,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 190 transitions. [2024-10-12 15:11:34,731 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 190 transitions. Word has length 51 [2024-10-12 15:11:34,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:11:34,732 INFO L471 AbstractCegarLoop]: Abstraction has 137 states and 190 transitions. [2024-10-12 15:11:34,732 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) [2024-10-12 15:11:34,732 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 190 transitions. [2024-10-12 15:11:34,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-10-12 15:11:34,733 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:11:34,733 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] [2024-10-12 15:11:34,747 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-10-12 15:11:34,937 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 [2024-10-12 15:11:34,937 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:11:34,938 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:11:34,938 INFO L85 PathProgramCache]: Analyzing trace with hash 1421224131, now seen corresponding path program 1 times [2024-10-12 15:11:34,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:11:34,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249399084] [2024-10-12 15:11:34,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:11:34,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:11:34,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:34,997 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-12 15:11:34,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:35,002 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-12 15:11:35,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:35,049 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-10-12 15:11:35,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:35,052 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-10-12 15:11:35,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:35,053 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-12 15:11:35,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:11:35,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249399084] [2024-10-12 15:11:35,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249399084] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 15:11:35,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654447570] [2024-10-12 15:11:35,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:11:35,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:11:35,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:11:35,057 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) [2024-10-12 15:11:35,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-12 15:11:35,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:35,114 INFO L255 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-10-12 15:11:35,116 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 15:11:35,258 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-10-12 15:11:35,258 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 15:11:35,585 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-10-12 15:11:35,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654447570] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 15:11:35,585 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 15:11:35,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 13, 14] total 28 [2024-10-12 15:11:35,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59581104] [2024-10-12 15:11:35,586 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 15:11:35,586 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-10-12 15:11:35,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:11:35,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-10-12 15:11:35,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=683, Unknown=0, NotChecked=0, Total=756 [2024-10-12 15:11:35,587 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) [2024-10-12 15:11:37,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:11:37,055 INFO L93 Difference]: Finished difference Result 439 states and 661 transitions. [2024-10-12 15:11:37,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2024-10-12 15:11:37,056 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 [2024-10-12 15:11:37,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:11:37,058 INFO L225 Difference]: With dead ends: 439 [2024-10-12 15:11:37,058 INFO L226 Difference]: Without dead ends: 276 [2024-10-12 15:11:37,059 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 [2024-10-12 15:11:37,060 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 [2024-10-12 15:11:37,060 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] [2024-10-12 15:11:37,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2024-10-12 15:11:37,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 150. [2024-10-12 15:11:37,084 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) [2024-10-12 15:11:37,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 217 transitions. [2024-10-12 15:11:37,088 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 217 transitions. Word has length 51 [2024-10-12 15:11:37,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:11:37,088 INFO L471 AbstractCegarLoop]: Abstraction has 150 states and 217 transitions. [2024-10-12 15:11:37,088 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) [2024-10-12 15:11:37,088 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 217 transitions. [2024-10-12 15:11:37,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-10-12 15:11:37,089 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:11:37,089 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] [2024-10-12 15:11:37,101 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-10-12 15:11:37,289 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 [2024-10-12 15:11:37,290 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:11:37,290 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:11:37,290 INFO L85 PathProgramCache]: Analyzing trace with hash 644594984, now seen corresponding path program 1 times [2024-10-12 15:11:37,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:11:37,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818517445] [2024-10-12 15:11:37,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:11:37,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:11:37,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:37,335 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-12 15:11:37,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:37,337 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-12 15:11:37,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:37,394 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-10-12 15:11:37,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:37,397 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-10-12 15:11:37,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:37,398 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 3 proven. 33 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-12 15:11:37,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:11:37,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818517445] [2024-10-12 15:11:37,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818517445] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 15:11:37,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287425411] [2024-10-12 15:11:37,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:11:37,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:11:37,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:11:37,400 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) [2024-10-12 15:11:37,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-10-12 15:11:37,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:37,451 INFO L255 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-12 15:11:37,452 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 15:11:37,502 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 20 proven. 26 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-12 15:11:37,502 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 15:11:37,634 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 3 proven. 33 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-12 15:11:37,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287425411] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 15:11:37,635 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 15:11:37,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2024-10-12 15:11:37,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249330693] [2024-10-12 15:11:37,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 15:11:37,636 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-12 15:11:37,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:11:37,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-12 15:11:37,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=244, Unknown=0, NotChecked=0, Total=380 [2024-10-12 15:11:37,637 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) [2024-10-12 15:11:37,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:11:37,780 INFO L93 Difference]: Finished difference Result 379 states and 541 transitions. [2024-10-12 15:11:37,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-12 15:11:37,781 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 [2024-10-12 15:11:37,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:11:37,782 INFO L225 Difference]: With dead ends: 379 [2024-10-12 15:11:37,782 INFO L226 Difference]: Without dead ends: 239 [2024-10-12 15:11:37,783 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 [2024-10-12 15:11:37,783 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 [2024-10-12 15:11:37,783 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] [2024-10-12 15:11:37,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2024-10-12 15:11:37,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 168. [2024-10-12 15:11:37,791 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) [2024-10-12 15:11:37,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 247 transitions. [2024-10-12 15:11:37,793 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 247 transitions. Word has length 56 [2024-10-12 15:11:37,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:11:37,793 INFO L471 AbstractCegarLoop]: Abstraction has 168 states and 247 transitions. [2024-10-12 15:11:37,793 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) [2024-10-12 15:11:37,793 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 247 transitions. [2024-10-12 15:11:37,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-10-12 15:11:37,794 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:11:37,794 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] [2024-10-12 15:11:37,807 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-10-12 15:11:37,994 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 [2024-10-12 15:11:37,995 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:11:37,995 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:11:37,995 INFO L85 PathProgramCache]: Analyzing trace with hash -546822584, now seen corresponding path program 1 times [2024-10-12 15:11:37,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:11:37,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248723409] [2024-10-12 15:11:37,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:11:37,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:11:38,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:38,085 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-12 15:11:38,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:38,087 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-12 15:11:38,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:38,091 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-10-12 15:11:38,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:38,093 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-10-12 15:11:38,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:38,113 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-10-12 15:11:38,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:11:38,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248723409] [2024-10-12 15:11:38,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248723409] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 15:11:38,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 15:11:38,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-12 15:11:38,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813251406] [2024-10-12 15:11:38,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 15:11:38,114 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-12 15:11:38,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:11:38,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-12 15:11:38,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-10-12 15:11:38,115 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) [2024-10-12 15:11:38,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:11:38,170 INFO L93 Difference]: Finished difference Result 195 states and 282 transitions. [2024-10-12 15:11:38,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-12 15:11:38,170 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 [2024-10-12 15:11:38,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:11:38,171 INFO L225 Difference]: With dead ends: 195 [2024-10-12 15:11:38,171 INFO L226 Difference]: Without dead ends: 184 [2024-10-12 15:11:38,171 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 [2024-10-12 15:11:38,172 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 [2024-10-12 15:11:38,172 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] [2024-10-12 15:11:38,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2024-10-12 15:11:38,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 172. [2024-10-12 15:11:38,179 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) [2024-10-12 15:11:38,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 256 transitions. [2024-10-12 15:11:38,180 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 256 transitions. Word has length 58 [2024-10-12 15:11:38,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:11:38,181 INFO L471 AbstractCegarLoop]: Abstraction has 172 states and 256 transitions. [2024-10-12 15:11:38,181 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) [2024-10-12 15:11:38,181 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 256 transitions. [2024-10-12 15:11:38,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-10-12 15:11:38,182 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:11:38,182 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] [2024-10-12 15:11:38,182 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-10-12 15:11:38,182 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:11:38,182 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:11:38,182 INFO L85 PathProgramCache]: Analyzing trace with hash -942318695, now seen corresponding path program 2 times [2024-10-12 15:11:38,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:11:38,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141838041] [2024-10-12 15:11:38,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:11:38,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:11:38,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:38,261 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-12 15:11:38,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:38,263 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-12 15:11:38,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:38,381 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-10-12 15:11:38,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:38,385 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-10-12 15:11:38,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:38,387 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 3 proven. 25 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-12 15:11:38,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:11:38,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141838041] [2024-10-12 15:11:38,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141838041] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 15:11:38,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380659540] [2024-10-12 15:11:38,388 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-12 15:11:38,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:11:38,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:11:38,389 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) [2024-10-12 15:11:38,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-10-12 15:11:38,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-12 15:11:38,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 15:11:38,448 INFO L255 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-10-12 15:11:38,450 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 15:11:38,735 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 7 proven. 25 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-10-12 15:11:38,735 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 15:11:39,249 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 3 proven. 25 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-12 15:11:39,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380659540] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 15:11:39,250 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 15:11:39,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 17, 16] total 37 [2024-10-12 15:11:39,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26972873] [2024-10-12 15:11:39,250 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 15:11:39,251 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-10-12 15:11:39,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:11:39,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-10-12 15:11:39,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1206, Unknown=0, NotChecked=0, Total=1332 [2024-10-12 15:11:39,252 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) [2024-10-12 15:11:41,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:11:41,987 INFO L93 Difference]: Finished difference Result 559 states and 899 transitions. [2024-10-12 15:11:41,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2024-10-12 15:11:41,987 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 [2024-10-12 15:11:41,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:11:41,989 INFO L225 Difference]: With dead ends: 559 [2024-10-12 15:11:41,989 INFO L226 Difference]: Without dead ends: 390 [2024-10-12 15:11:41,992 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1938 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1089, Invalid=6921, Unknown=0, NotChecked=0, Total=8010 [2024-10-12 15:11:41,992 INFO L432 NwaCegarLoop]: 114 mSDtfsCounter, 562 mSDsluCounter, 2253 mSDsCounter, 0 mSdLazyCounter, 2081 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s 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, 1.1s IncrementalHoareTripleChecker+Time [2024-10-12 15:11:41,993 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [574 Valid, 2367 Invalid, 2246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 2081 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-10-12 15:11:41,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2024-10-12 15:11:42,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 179. [2024-10-12 15:11:42,006 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) [2024-10-12 15:11:42,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 284 transitions. [2024-10-12 15:11:42,007 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 284 transitions. Word has length 60 [2024-10-12 15:11:42,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:11:42,007 INFO L471 AbstractCegarLoop]: Abstraction has 179 states and 284 transitions. [2024-10-12 15:11:42,007 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) [2024-10-12 15:11:42,007 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 284 transitions. [2024-10-12 15:11:42,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-10-12 15:11:42,008 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:11:42,008 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] [2024-10-12 15:11:42,026 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-10-12 15:11:42,212 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 [2024-10-12 15:11:42,213 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:11:42,213 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:11:42,213 INFO L85 PathProgramCache]: Analyzing trace with hash 2127673157, now seen corresponding path program 1 times [2024-10-12 15:11:42,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:11:42,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10547821] [2024-10-12 15:11:42,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:11:42,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:11:42,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:42,304 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-12 15:11:42,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:42,308 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-12 15:11:42,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:42,314 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-10-12 15:11:42,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:42,316 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-10-12 15:11:42,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:42,330 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2024-10-12 15:11:42,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:11:42,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10547821] [2024-10-12 15:11:42,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10547821] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 15:11:42,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 15:11:42,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-12 15:11:42,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466091298] [2024-10-12 15:11:42,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 15:11:42,331 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-12 15:11:42,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:11:42,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-12 15:11:42,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-10-12 15:11:42,332 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) [2024-10-12 15:11:42,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:11:42,363 INFO L93 Difference]: Finished difference Result 227 states and 346 transitions. [2024-10-12 15:11:42,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-12 15:11:42,363 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 [2024-10-12 15:11:42,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:11:42,364 INFO L225 Difference]: With dead ends: 227 [2024-10-12 15:11:42,365 INFO L226 Difference]: Without dead ends: 182 [2024-10-12 15:11:42,365 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 [2024-10-12 15:11:42,366 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 [2024-10-12 15:11:42,366 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] [2024-10-12 15:11:42,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2024-10-12 15:11:42,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 175. [2024-10-12 15:11:42,378 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) [2024-10-12 15:11:42,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 259 transitions. [2024-10-12 15:11:42,379 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 259 transitions. Word has length 68 [2024-10-12 15:11:42,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:11:42,379 INFO L471 AbstractCegarLoop]: Abstraction has 175 states and 259 transitions. [2024-10-12 15:11:42,379 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) [2024-10-12 15:11:42,379 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 259 transitions. [2024-10-12 15:11:42,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-10-12 15:11:42,380 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:11:42,380 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] [2024-10-12 15:11:42,380 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-10-12 15:11:42,380 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:11:42,380 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:11:42,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1573646453, now seen corresponding path program 1 times [2024-10-12 15:11:42,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:11:42,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397409042] [2024-10-12 15:11:42,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:11:42,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:11:42,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:42,479 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-12 15:11:42,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:42,482 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-12 15:11:42,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:42,490 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-10-12 15:11:42,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:42,523 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-10-12 15:11:42,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:42,526 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2024-10-12 15:11:42,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:11:42,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397409042] [2024-10-12 15:11:42,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397409042] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 15:11:42,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670732105] [2024-10-12 15:11:42,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:11:42,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:11:42,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:11:42,528 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) [2024-10-12 15:11:42,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-10-12 15:11:42,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:42,591 INFO L255 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-10-12 15:11:42,593 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 15:11:43,036 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-10-12 15:11:43,037 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 15:11:43,312 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-10-12 15:11:43,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670732105] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 15:11:43,313 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 15:11:43,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 12] total 27 [2024-10-12 15:11:43,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141818576] [2024-10-12 15:11:43,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 15:11:43,313 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-10-12 15:11:43,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:11:43,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-10-12 15:11:43,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=631, Unknown=0, NotChecked=0, Total=702 [2024-10-12 15:11:43,314 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) [2024-10-12 15:11:43,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:11:43,776 INFO L93 Difference]: Finished difference Result 363 states and 563 transitions. [2024-10-12 15:11:43,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-10-12 15:11:43,777 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 [2024-10-12 15:11:43,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:11:43,779 INFO L225 Difference]: With dead ends: 363 [2024-10-12 15:11:43,780 INFO L226 Difference]: Without dead ends: 260 [2024-10-12 15:11:43,781 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=148, Invalid=1184, Unknown=0, NotChecked=0, Total=1332 [2024-10-12 15:11:43,782 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 [2024-10-12 15:11:43,782 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] [2024-10-12 15:11:43,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2024-10-12 15:11:43,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 191. [2024-10-12 15:11:43,794 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) [2024-10-12 15:11:43,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 320 transitions. [2024-10-12 15:11:43,795 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 320 transitions. Word has length 70 [2024-10-12 15:11:43,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:11:43,796 INFO L471 AbstractCegarLoop]: Abstraction has 191 states and 320 transitions. [2024-10-12 15:11:43,796 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) [2024-10-12 15:11:43,796 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 320 transitions. [2024-10-12 15:11:43,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-10-12 15:11:43,797 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:11:43,798 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] [2024-10-12 15:11:43,811 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-10-12 15:11:44,001 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 [2024-10-12 15:11:44,002 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:11:44,002 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:11:44,002 INFO L85 PathProgramCache]: Analyzing trace with hash 317035896, now seen corresponding path program 1 times [2024-10-12 15:11:44,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:11:44,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784600224] [2024-10-12 15:11:44,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:11:44,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:11:44,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:44,078 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-12 15:11:44,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:44,080 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-12 15:11:44,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:44,197 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-10-12 15:11:44,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:44,199 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-10-12 15:11:44,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:44,202 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 3 proven. 37 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-12 15:11:44,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:11:44,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784600224] [2024-10-12 15:11:44,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784600224] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 15:11:44,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833007550] [2024-10-12 15:11:44,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:11:44,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:11:44,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:11:44,205 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) [2024-10-12 15:11:44,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-10-12 15:11:44,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:44,265 INFO L255 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-10-12 15:11:44,267 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 15:11:44,358 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 30 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-12 15:11:44,358 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 15:11:44,538 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 3 proven. 37 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-12 15:11:44,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833007550] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 15:11:44,538 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 15:11:44,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2024-10-12 15:11:44,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705436292] [2024-10-12 15:11:44,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 15:11:44,539 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-10-12 15:11:44,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:11:44,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-10-12 15:11:44,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=310, Unknown=0, NotChecked=0, Total=462 [2024-10-12 15:11:44,540 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) [2024-10-12 15:11:44,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:11:44,998 INFO L93 Difference]: Finished difference Result 465 states and 758 transitions. [2024-10-12 15:11:44,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-10-12 15:11:45,000 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 [2024-10-12 15:11:45,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:11:45,004 INFO L225 Difference]: With dead ends: 465 [2024-10-12 15:11:45,004 INFO L226 Difference]: Without dead ends: 290 [2024-10-12 15:11:45,005 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 [2024-10-12 15:11:45,010 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 [2024-10-12 15:11:45,011 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] [2024-10-12 15:11:45,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2024-10-12 15:11:45,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 200. [2024-10-12 15:11:45,029 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) [2024-10-12 15:11:45,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 333 transitions. [2024-10-12 15:11:45,030 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 333 transitions. Word has length 71 [2024-10-12 15:11:45,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:11:45,030 INFO L471 AbstractCegarLoop]: Abstraction has 200 states and 333 transitions. [2024-10-12 15:11:45,030 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) [2024-10-12 15:11:45,030 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 333 transitions. [2024-10-12 15:11:45,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-10-12 15:11:45,031 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:11:45,031 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] [2024-10-12 15:11:45,045 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-10-12 15:11:45,232 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 [2024-10-12 15:11:45,232 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:11:45,232 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:11:45,232 INFO L85 PathProgramCache]: Analyzing trace with hash -293932278, now seen corresponding path program 1 times [2024-10-12 15:11:45,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:11:45,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412598526] [2024-10-12 15:11:45,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:11:45,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:11:45,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:45,334 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-12 15:11:45,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:45,335 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-12 15:11:45,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:45,344 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-10-12 15:11:45,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:45,362 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-10-12 15:11:45,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:45,366 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2024-10-12 15:11:45,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:11:45,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412598526] [2024-10-12 15:11:45,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412598526] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 15:11:45,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037596628] [2024-10-12 15:11:45,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:11:45,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:11:45,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:11:45,368 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) [2024-10-12 15:11:45,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-10-12 15:11:45,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:45,429 INFO L255 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-10-12 15:11:45,430 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 15:11:45,470 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-10-12 15:11:45,470 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 15:11:45,632 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-10-12 15:11:45,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037596628] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 15:11:45,632 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 15:11:45,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 11] total 21 [2024-10-12 15:11:45,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365192634] [2024-10-12 15:11:45,632 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 15:11:45,632 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-12 15:11:45,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:11:45,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-12 15:11:45,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2024-10-12 15:11:45,633 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) [2024-10-12 15:11:45,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:11:45,740 INFO L93 Difference]: Finished difference Result 210 states and 342 transitions. [2024-10-12 15:11:45,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-12 15:11:45,741 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 [2024-10-12 15:11:45,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:11:45,742 INFO L225 Difference]: With dead ends: 210 [2024-10-12 15:11:45,742 INFO L226 Difference]: Without dead ends: 165 [2024-10-12 15:11:45,743 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 [2024-10-12 15:11:45,743 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 [2024-10-12 15:11:45,743 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] [2024-10-12 15:11:45,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2024-10-12 15:11:45,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2024-10-12 15:11:45,754 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) [2024-10-12 15:11:45,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 265 transitions. [2024-10-12 15:11:45,755 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 265 transitions. Word has length 72 [2024-10-12 15:11:45,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:11:45,755 INFO L471 AbstractCegarLoop]: Abstraction has 165 states and 265 transitions. [2024-10-12 15:11:45,756 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) [2024-10-12 15:11:45,756 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 265 transitions. [2024-10-12 15:11:45,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-10-12 15:11:45,757 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:11:45,757 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] [2024-10-12 15:11:45,769 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-10-12 15:11:45,957 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 [2024-10-12 15:11:45,957 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:11:45,958 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:11:45,958 INFO L85 PathProgramCache]: Analyzing trace with hash -1758239640, now seen corresponding path program 2 times [2024-10-12 15:11:45,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:11:45,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840889786] [2024-10-12 15:11:45,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:11:45,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:11:45,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:46,020 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-12 15:11:46,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:46,022 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-12 15:11:46,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:46,170 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-10-12 15:11:46,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:46,172 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2024-10-12 15:11:46,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:46,173 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 3 proven. 162 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-12 15:11:46,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:11:46,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840889786] [2024-10-12 15:11:46,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840889786] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 15:11:46,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349922967] [2024-10-12 15:11:46,174 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-12 15:11:46,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:11:46,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:11:46,175 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) [2024-10-12 15:11:46,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-10-12 15:11:46,242 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-12 15:11:46,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 15:11:46,243 INFO L255 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-12 15:11:46,244 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 15:11:46,367 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 20 proven. 155 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-12 15:11:46,368 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 15:11:46,703 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 3 proven. 162 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-12 15:11:46,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349922967] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 15:11:46,704 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 15:11:46,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 38 [2024-10-12 15:11:46,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726638136] [2024-10-12 15:11:46,704 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 15:11:46,706 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-10-12 15:11:46,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:11:46,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-10-12 15:11:46,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=490, Invalid=916, Unknown=0, NotChecked=0, Total=1406 [2024-10-12 15:11:46,708 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) [2024-10-12 15:11:46,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:11:46,907 INFO L93 Difference]: Finished difference Result 494 states and 728 transitions. [2024-10-12 15:11:46,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-10-12 15:11:46,908 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 [2024-10-12 15:11:46,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:11:46,910 INFO L225 Difference]: With dead ends: 494 [2024-10-12 15:11:46,910 INFO L226 Difference]: Without dead ends: 349 [2024-10-12 15:11:46,911 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 [2024-10-12 15:11:46,911 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 [2024-10-12 15:11:46,911 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] [2024-10-12 15:11:46,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2024-10-12 15:11:46,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 197. [2024-10-12 15:11:46,924 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) [2024-10-12 15:11:46,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 318 transitions. [2024-10-12 15:11:46,925 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 318 transitions. Word has length 74 [2024-10-12 15:11:46,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:11:46,925 INFO L471 AbstractCegarLoop]: Abstraction has 197 states and 318 transitions. [2024-10-12 15:11:46,925 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) [2024-10-12 15:11:46,925 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 318 transitions. [2024-10-12 15:11:46,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-10-12 15:11:46,926 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:11:46,926 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] [2024-10-12 15:11:46,941 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-10-12 15:11:47,127 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 [2024-10-12 15:11:47,127 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:11:47,128 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:11:47,128 INFO L85 PathProgramCache]: Analyzing trace with hash -872883213, now seen corresponding path program 1 times [2024-10-12 15:11:47,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:11:47,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206420420] [2024-10-12 15:11:47,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:11:47,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:11:47,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:47,211 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-12 15:11:47,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:47,213 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-12 15:11:47,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:47,218 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-10-12 15:11:47,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:47,220 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-10-12 15:11:47,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:47,221 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-10-12 15:11:47,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:11:47,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206420420] [2024-10-12 15:11:47,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206420420] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 15:11:47,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 15:11:47,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-12 15:11:47,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688097672] [2024-10-12 15:11:47,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 15:11:47,222 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-12 15:11:47,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:11:47,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-12 15:11:47,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-12 15:11:47,223 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) [2024-10-12 15:11:47,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:11:47,260 INFO L93 Difference]: Finished difference Result 209 states and 330 transitions. [2024-10-12 15:11:47,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-12 15:11:47,260 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 [2024-10-12 15:11:47,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:11:47,262 INFO L225 Difference]: With dead ends: 209 [2024-10-12 15:11:47,262 INFO L226 Difference]: Without dead ends: 204 [2024-10-12 15:11:47,262 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 [2024-10-12 15:11:47,262 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 [2024-10-12 15:11:47,263 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] [2024-10-12 15:11:47,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2024-10-12 15:11:47,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 203. [2024-10-12 15:11:47,274 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) [2024-10-12 15:11:47,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 324 transitions. [2024-10-12 15:11:47,276 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 324 transitions. Word has length 74 [2024-10-12 15:11:47,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:11:47,276 INFO L471 AbstractCegarLoop]: Abstraction has 203 states and 324 transitions. [2024-10-12 15:11:47,276 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) [2024-10-12 15:11:47,276 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 324 transitions. [2024-10-12 15:11:47,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2024-10-12 15:11:47,277 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:11:47,277 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] [2024-10-12 15:11:47,278 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-10-12 15:11:47,278 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:11:47,278 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:11:47,278 INFO L85 PathProgramCache]: Analyzing trace with hash 131578640, now seen corresponding path program 1 times [2024-10-12 15:11:47,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:11:47,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380156198] [2024-10-12 15:11:47,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:11:47,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:11:47,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:47,366 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-12 15:11:47,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:47,370 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-12 15:11:47,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:47,486 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-10-12 15:11:47,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:47,488 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-10-12 15:11:47,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:47,490 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 3 proven. 38 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-10-12 15:11:47,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:11:47,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380156198] [2024-10-12 15:11:47,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380156198] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 15:11:47,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639263307] [2024-10-12 15:11:47,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:11:47,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:11:47,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:11:47,492 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) [2024-10-12 15:11:47,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-10-12 15:11:47,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:47,556 INFO L255 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-10-12 15:11:47,557 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 15:11:47,621 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2024-10-12 15:11:47,621 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-12 15:11:47,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639263307] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 15:11:47,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-12 15:11:47,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 15 [2024-10-12 15:11:47,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489043988] [2024-10-12 15:11:47,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 15:11:47,621 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-12 15:11:47,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:11:47,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-12 15:11:47,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2024-10-12 15:11:47,622 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) [2024-10-12 15:11:47,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:11:47,685 INFO L93 Difference]: Finished difference Result 312 states and 488 transitions. [2024-10-12 15:11:47,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-12 15:11:47,689 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 [2024-10-12 15:11:47,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:11:47,691 INFO L225 Difference]: With dead ends: 312 [2024-10-12 15:11:47,691 INFO L226 Difference]: Without dead ends: 257 [2024-10-12 15:11:47,691 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 [2024-10-12 15:11:47,691 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 [2024-10-12 15:11:47,692 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] [2024-10-12 15:11:47,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2024-10-12 15:11:47,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 241. [2024-10-12 15:11:47,710 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) [2024-10-12 15:11:47,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 401 transitions. [2024-10-12 15:11:47,711 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 401 transitions. Word has length 75 [2024-10-12 15:11:47,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:11:47,712 INFO L471 AbstractCegarLoop]: Abstraction has 241 states and 401 transitions. [2024-10-12 15:11:47,712 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) [2024-10-12 15:11:47,712 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 401 transitions. [2024-10-12 15:11:47,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2024-10-12 15:11:47,713 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:11:47,713 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] [2024-10-12 15:11:47,727 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-10-12 15:11:47,917 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 [2024-10-12 15:11:47,918 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:11:47,918 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:11:47,918 INFO L85 PathProgramCache]: Analyzing trace with hash -1862566066, now seen corresponding path program 1 times [2024-10-12 15:11:47,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:11:47,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689786714] [2024-10-12 15:11:47,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:11:47,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:11:47,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:48,011 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-12 15:11:48,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:48,012 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-12 15:11:48,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:48,124 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-10-12 15:11:48,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:48,126 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-10-12 15:11:48,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:48,128 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 3 proven. 38 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-10-12 15:11:48,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:11:48,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689786714] [2024-10-12 15:11:48,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689786714] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 15:11:48,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803773966] [2024-10-12 15:11:48,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:11:48,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:11:48,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:11:48,132 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) [2024-10-12 15:11:48,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-10-12 15:11:48,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:48,290 INFO L255 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-10-12 15:11:48,291 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 15:11:48,361 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2024-10-12 15:11:48,361 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-12 15:11:48,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803773966] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 15:11:48,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-12 15:11:48,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 16 [2024-10-12 15:11:48,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359038197] [2024-10-12 15:11:48,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 15:11:48,362 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-12 15:11:48,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:11:48,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-12 15:11:48,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2024-10-12 15:11:48,362 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) [2024-10-12 15:11:48,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:11:48,450 INFO L93 Difference]: Finished difference Result 284 states and 451 transitions. [2024-10-12 15:11:48,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-12 15:11:48,451 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 [2024-10-12 15:11:48,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:11:48,452 INFO L225 Difference]: With dead ends: 284 [2024-10-12 15:11:48,452 INFO L226 Difference]: Without dead ends: 258 [2024-10-12 15:11:48,453 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 [2024-10-12 15:11:48,453 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 [2024-10-12 15:11:48,453 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] [2024-10-12 15:11:48,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2024-10-12 15:11:48,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 247. [2024-10-12 15:11:48,467 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) [2024-10-12 15:11:48,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 408 transitions. [2024-10-12 15:11:48,468 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 408 transitions. Word has length 75 [2024-10-12 15:11:48,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:11:48,468 INFO L471 AbstractCegarLoop]: Abstraction has 247 states and 408 transitions. [2024-10-12 15:11:48,468 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) [2024-10-12 15:11:48,468 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 408 transitions. [2024-10-12 15:11:48,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2024-10-12 15:11:48,470 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:11:48,470 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] [2024-10-12 15:11:48,484 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-10-12 15:11:48,670 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 [2024-10-12 15:11:48,671 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:11:48,671 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:11:48,671 INFO L85 PathProgramCache]: Analyzing trace with hash -408521237, now seen corresponding path program 1 times [2024-10-12 15:11:48,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:11:48,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024183110] [2024-10-12 15:11:48,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:11:48,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:11:48,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:48,765 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-12 15:11:48,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:48,767 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-12 15:11:48,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:48,878 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-10-12 15:11:48,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:48,880 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-10-12 15:11:48,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:48,881 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 3 proven. 38 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-10-12 15:11:48,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:11:48,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024183110] [2024-10-12 15:11:48,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024183110] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 15:11:48,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078236316] [2024-10-12 15:11:48,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:11:48,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:11:48,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:11:48,883 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) [2024-10-12 15:11:48,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-10-12 15:11:48,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:48,946 INFO L255 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-10-12 15:11:48,948 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 15:11:49,028 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2024-10-12 15:11:49,028 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-12 15:11:49,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078236316] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 15:11:49,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-12 15:11:49,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 16 [2024-10-12 15:11:49,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375959488] [2024-10-12 15:11:49,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 15:11:49,029 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-12 15:11:49,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:11:49,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-12 15:11:49,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2024-10-12 15:11:49,030 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) [2024-10-12 15:11:49,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:11:49,134 INFO L93 Difference]: Finished difference Result 286 states and 452 transitions. [2024-10-12 15:11:49,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-12 15:11:49,135 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 [2024-10-12 15:11:49,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:11:49,136 INFO L225 Difference]: With dead ends: 286 [2024-10-12 15:11:49,136 INFO L226 Difference]: Without dead ends: 256 [2024-10-12 15:11:49,136 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 [2024-10-12 15:11:49,137 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 [2024-10-12 15:11:49,137 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] [2024-10-12 15:11:49,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2024-10-12 15:11:49,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 247. [2024-10-12 15:11:49,151 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) [2024-10-12 15:11:49,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 407 transitions. [2024-10-12 15:11:49,152 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 407 transitions. Word has length 77 [2024-10-12 15:11:49,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:11:49,152 INFO L471 AbstractCegarLoop]: Abstraction has 247 states and 407 transitions. [2024-10-12 15:11:49,153 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) [2024-10-12 15:11:49,153 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 407 transitions. [2024-10-12 15:11:49,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2024-10-12 15:11:49,155 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:11:49,155 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] [2024-10-12 15:11:49,167 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-10-12 15:11:49,357 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 [2024-10-12 15:11:49,357 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:11:49,357 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:11:49,357 INFO L85 PathProgramCache]: Analyzing trace with hash -1309187367, now seen corresponding path program 3 times [2024-10-12 15:11:49,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:11:49,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315123793] [2024-10-12 15:11:49,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:11:49,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:11:49,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:49,478 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-12 15:11:49,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:49,480 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-12 15:11:49,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:49,706 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-10-12 15:11:49,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:49,708 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2024-10-12 15:11:49,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:49,710 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 3 proven. 142 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-12 15:11:49,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:11:49,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315123793] [2024-10-12 15:11:49,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315123793] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 15:11:49,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132952710] [2024-10-12 15:11:49,710 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-12 15:11:49,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:11:49,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:11:49,712 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) [2024-10-12 15:11:49,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-10-12 15:11:49,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2024-10-12 15:11:49,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 15:11:49,933 INFO L255 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-10-12 15:11:49,935 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 15:11:50,334 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 7 proven. 142 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-10-12 15:11:50,335 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 15:11:51,187 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 3 proven. 142 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-12 15:11:51,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132952710] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 15:11:51,188 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 15:11:51,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 23, 22] total 55 [2024-10-12 15:11:51,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923690153] [2024-10-12 15:11:51,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 15:11:51,189 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2024-10-12 15:11:51,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:11:51,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2024-10-12 15:11:51,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=2706, Unknown=0, NotChecked=0, Total=2970 [2024-10-12 15:11:51,191 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) [2024-10-12 15:11:57,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:11:57,877 INFO L93 Difference]: Finished difference Result 863 states and 1493 transitions. [2024-10-12 15:11:57,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2024-10-12 15:11:57,879 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 [2024-10-12 15:11:57,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:11:57,884 INFO L225 Difference]: With dead ends: 863 [2024-10-12 15:11:57,885 INFO L226 Difference]: Without dead ends: 622 [2024-10-12 15:11:57,891 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5754 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=3426, Invalid=18924, Unknown=0, NotChecked=0, Total=22350 [2024-10-12 15:11:57,892 INFO L432 NwaCegarLoop]: 133 mSDtfsCounter, 2650 mSDsluCounter, 3777 mSDsCounter, 0 mSdLazyCounter, 4480 mSolverCounterSat, 908 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s 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, 2.2s IncrementalHoareTripleChecker+Time [2024-10-12 15:11:57,892 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2668 Valid, 3910 Invalid, 5388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [908 Valid, 4480 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2024-10-12 15:11:57,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2024-10-12 15:11:57,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 248. [2024-10-12 15:11:57,915 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) [2024-10-12 15:11:57,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 409 transitions. [2024-10-12 15:11:57,916 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 409 transitions. Word has length 78 [2024-10-12 15:11:57,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:11:57,917 INFO L471 AbstractCegarLoop]: Abstraction has 248 states and 409 transitions. [2024-10-12 15:11:57,917 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) [2024-10-12 15:11:57,917 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 409 transitions. [2024-10-12 15:11:57,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2024-10-12 15:11:57,918 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:11:57,918 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] [2024-10-12 15:11:57,931 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-10-12 15:11:58,118 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 [2024-10-12 15:11:58,119 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:11:58,119 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:11:58,119 INFO L85 PathProgramCache]: Analyzing trace with hash -1145215511, now seen corresponding path program 1 times [2024-10-12 15:11:58,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:11:58,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698816060] [2024-10-12 15:11:58,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:11:58,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:11:58,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:58,236 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-12 15:11:58,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:58,238 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-12 15:11:58,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:58,244 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-10-12 15:11:58,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:58,259 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-10-12 15:11:58,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:58,263 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 194 trivial. 0 not checked. [2024-10-12 15:11:58,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:11:58,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698816060] [2024-10-12 15:11:58,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698816060] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 15:11:58,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299249749] [2024-10-12 15:11:58,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:11:58,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:11:58,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:11:58,265 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) [2024-10-12 15:11:58,266 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-10-12 15:11:58,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:58,333 INFO L255 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-12 15:11:58,334 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 15:11:58,401 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 194 trivial. 0 not checked. [2024-10-12 15:11:58,402 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 15:11:58,515 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 194 trivial. 0 not checked. [2024-10-12 15:11:58,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299249749] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 15:11:58,516 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 15:11:58,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 16 [2024-10-12 15:11:58,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603868827] [2024-10-12 15:11:58,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 15:11:58,517 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-12 15:11:58,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:11:58,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-12 15:11:58,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2024-10-12 15:11:58,517 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) [2024-10-12 15:11:58,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:11:58,637 INFO L93 Difference]: Finished difference Result 292 states and 460 transitions. [2024-10-12 15:11:58,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-12 15:11:58,637 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 [2024-10-12 15:11:58,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:11:58,639 INFO L225 Difference]: With dead ends: 292 [2024-10-12 15:11:58,639 INFO L226 Difference]: Without dead ends: 258 [2024-10-12 15:11:58,639 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 [2024-10-12 15:11:58,640 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 [2024-10-12 15:11:58,640 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] [2024-10-12 15:11:58,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2024-10-12 15:11:58,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 248. [2024-10-12 15:11:58,656 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) [2024-10-12 15:11:58,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 407 transitions. [2024-10-12 15:11:58,658 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 407 transitions. Word has length 96 [2024-10-12 15:11:58,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:11:58,658 INFO L471 AbstractCegarLoop]: Abstraction has 248 states and 407 transitions. [2024-10-12 15:11:58,658 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) [2024-10-12 15:11:58,658 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 407 transitions. [2024-10-12 15:11:58,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2024-10-12 15:11:58,659 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:11:58,659 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] [2024-10-12 15:11:58,674 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-10-12 15:11:58,860 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 [2024-10-12 15:11:58,860 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:11:58,860 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:11:58,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1155607079, now seen corresponding path program 1 times [2024-10-12 15:11:58,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:11:58,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699521137] [2024-10-12 15:11:58,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:11:58,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:11:58,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:59,003 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-12 15:11:59,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:59,004 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-12 15:11:59,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:59,261 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-10-12 15:11:59,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:59,263 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-10-12 15:11:59,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:59,266 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 3 proven. 179 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-10-12 15:11:59,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:11:59,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699521137] [2024-10-12 15:11:59,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699521137] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 15:11:59,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815881320] [2024-10-12 15:11:59,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:11:59,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:11:59,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:11:59,268 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) [2024-10-12 15:11:59,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-10-12 15:11:59,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:11:59,467 INFO L255 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-10-12 15:11:59,468 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 15:11:59,572 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 194 trivial. 0 not checked. [2024-10-12 15:11:59,572 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 15:11:59,701 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 194 trivial. 0 not checked. [2024-10-12 15:11:59,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815881320] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 15:11:59,701 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 15:11:59,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8, 8] total 27 [2024-10-12 15:11:59,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110798452] [2024-10-12 15:11:59,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 15:11:59,702 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-10-12 15:11:59,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:11:59,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-10-12 15:11:59,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=632, Unknown=0, NotChecked=0, Total=702 [2024-10-12 15:11:59,702 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) [2024-10-12 15:12:00,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:12:00,609 INFO L93 Difference]: Finished difference Result 516 states and 847 transitions. [2024-10-12 15:12:00,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-10-12 15:12:00,612 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 [2024-10-12 15:12:00,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:12:00,613 INFO L225 Difference]: With dead ends: 516 [2024-10-12 15:12:00,614 INFO L226 Difference]: Without dead ends: 295 [2024-10-12 15:12:00,617 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 [2024-10-12 15:12:00,617 INFO L432 NwaCegarLoop]: 82 mSDtfsCounter, 285 mSDsluCounter, 1422 mSDsCounter, 0 mSdLazyCounter, 1205 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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, 0.6s IncrementalHoareTripleChecker+Time [2024-10-12 15:12:00,618 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [285 Valid, 1504 Invalid, 1246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1205 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-10-12 15:12:00,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2024-10-12 15:12:00,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 242. [2024-10-12 15:12:00,636 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) [2024-10-12 15:12:00,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 398 transitions. [2024-10-12 15:12:00,637 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 398 transitions. Word has length 96 [2024-10-12 15:12:00,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:12:00,637 INFO L471 AbstractCegarLoop]: Abstraction has 242 states and 398 transitions. [2024-10-12 15:12:00,637 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) [2024-10-12 15:12:00,637 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 398 transitions. [2024-10-12 15:12:00,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2024-10-12 15:12:00,639 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:12:00,639 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] [2024-10-12 15:12:00,653 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-10-12 15:12:00,839 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 [2024-10-12 15:12:00,840 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:12:00,841 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:12:00,841 INFO L85 PathProgramCache]: Analyzing trace with hash 209642660, now seen corresponding path program 1 times [2024-10-12 15:12:00,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:12:00,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421139424] [2024-10-12 15:12:00,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:12:00,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:12:00,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:12:00,939 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-12 15:12:00,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:12:00,940 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-12 15:12:00,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:12:01,143 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2024-10-12 15:12:01,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:12:01,145 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-10-12 15:12:01,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:12:01,147 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 3 proven. 206 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-10-12 15:12:01,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:12:01,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421139424] [2024-10-12 15:12:01,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421139424] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 15:12:01,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23124218] [2024-10-12 15:12:01,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:12:01,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:12:01,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:12:01,148 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) [2024-10-12 15:12:01,150 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-10-12 15:12:01,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:12:01,216 INFO L255 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-10-12 15:12:01,217 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 15:12:01,465 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 21 proven. 198 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-12 15:12:01,466 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 15:12:01,877 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 3 proven. 206 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-10-12 15:12:01,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23124218] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 15:12:01,877 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 15:12:01,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 43 [2024-10-12 15:12:01,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836137858] [2024-10-12 15:12:01,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 15:12:01,877 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-10-12 15:12:01,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:12:01,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-10-12 15:12:01,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=509, Invalid=1297, Unknown=0, NotChecked=0, Total=1806 [2024-10-12 15:12:01,879 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) [2024-10-12 15:12:03,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:12:03,396 INFO L93 Difference]: Finished difference Result 669 states and 1053 transitions. [2024-10-12 15:12:03,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-10-12 15:12:03,396 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 [2024-10-12 15:12:03,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:12:03,398 INFO L225 Difference]: With dead ends: 669 [2024-10-12 15:12:03,398 INFO L226 Difference]: Without dead ends: 445 [2024-10-12 15:12:03,400 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 [2024-10-12 15:12:03,400 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 [2024-10-12 15:12:03,400 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] [2024-10-12 15:12:03,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2024-10-12 15:12:03,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 257. [2024-10-12 15:12:03,420 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) [2024-10-12 15:12:03,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 421 transitions. [2024-10-12 15:12:03,422 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 421 transitions. Word has length 99 [2024-10-12 15:12:03,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:12:03,422 INFO L471 AbstractCegarLoop]: Abstraction has 257 states and 421 transitions. [2024-10-12 15:12:03,422 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) [2024-10-12 15:12:03,422 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 421 transitions. [2024-10-12 15:12:03,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2024-10-12 15:12:03,423 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:12:03,423 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] [2024-10-12 15:12:03,436 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-10-12 15:12:03,623 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 [2024-10-12 15:12:03,624 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:12:03,624 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:12:03,624 INFO L85 PathProgramCache]: Analyzing trace with hash 970353726, now seen corresponding path program 1 times [2024-10-12 15:12:03,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:12:03,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586439824] [2024-10-12 15:12:03,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:12:03,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:12:03,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:12:03,754 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-12 15:12:03,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:12:03,756 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-12 15:12:03,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:12:04,015 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2024-10-12 15:12:04,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:12:04,017 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2024-10-12 15:12:04,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:12:04,019 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 3 proven. 206 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-10-12 15:12:04,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:12:04,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586439824] [2024-10-12 15:12:04,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586439824] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 15:12:04,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003895470] [2024-10-12 15:12:04,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:12:04,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:12:04,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:12:04,020 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) [2024-10-12 15:12:04,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-10-12 15:12:04,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:12:04,197 INFO L255 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-10-12 15:12:04,199 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 15:12:04,339 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-10-12 15:12:04,339 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-12 15:12:04,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003895470] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 15:12:04,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-12 15:12:04,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [16] total 25 [2024-10-12 15:12:04,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244691141] [2024-10-12 15:12:04,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 15:12:04,339 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-12 15:12:04,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:12:04,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-12 15:12:04,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2024-10-12 15:12:04,340 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) [2024-10-12 15:12:04,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:12:04,500 INFO L93 Difference]: Finished difference Result 294 states and 463 transitions. [2024-10-12 15:12:04,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-12 15:12:04,501 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 [2024-10-12 15:12:04,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:12:04,502 INFO L225 Difference]: With dead ends: 294 [2024-10-12 15:12:04,502 INFO L226 Difference]: Without dead ends: 258 [2024-10-12 15:12:04,503 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 [2024-10-12 15:12:04,504 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 [2024-10-12 15:12:04,504 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] [2024-10-12 15:12:04,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2024-10-12 15:12:04,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 245. [2024-10-12 15:12:04,523 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) [2024-10-12 15:12:04,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 394 transitions. [2024-10-12 15:12:04,524 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 394 transitions. Word has length 100 [2024-10-12 15:12:04,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:12:04,524 INFO L471 AbstractCegarLoop]: Abstraction has 245 states and 394 transitions. [2024-10-12 15:12:04,525 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) [2024-10-12 15:12:04,525 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 394 transitions. [2024-10-12 15:12:04,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2024-10-12 15:12:04,526 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:12:04,526 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] [2024-10-12 15:12:04,540 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-10-12 15:12:04,727 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 [2024-10-12 15:12:04,727 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:12:04,727 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:12:04,727 INFO L85 PathProgramCache]: Analyzing trace with hash -61095346, now seen corresponding path program 1 times [2024-10-12 15:12:04,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:12:04,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001963393] [2024-10-12 15:12:04,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:12:04,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:12:04,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:12:04,881 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-12 15:12:04,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:12:04,883 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-12 15:12:04,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:12:05,147 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2024-10-12 15:12:05,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:12:05,149 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2024-10-12 15:12:05,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:12:05,152 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 3 proven. 212 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-10-12 15:12:05,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:12:05,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001963393] [2024-10-12 15:12:05,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001963393] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 15:12:05,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085120782] [2024-10-12 15:12:05,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:12:05,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:12:05,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:12:05,154 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) [2024-10-12 15:12:05,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-10-12 15:12:05,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:12:05,595 INFO L255 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 67 conjuncts are in the unsatisfiable core [2024-10-12 15:12:05,598 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 15:12:06,280 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 5 proven. 214 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-10-12 15:12:06,280 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 15:12:06,899 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 227 trivial. 0 not checked. [2024-10-12 15:12:06,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085120782] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 15:12:06,900 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 15:12:06,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 28, 13] total 53 [2024-10-12 15:12:06,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205500219] [2024-10-12 15:12:06,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 15:12:06,900 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2024-10-12 15:12:06,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:12:06,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2024-10-12 15:12:06,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=2594, Unknown=0, NotChecked=0, Total=2756 [2024-10-12 15:12:06,901 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) [2024-10-12 15:12:11,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:12:11,574 INFO L93 Difference]: Finished difference Result 603 states and 942 transitions. [2024-10-12 15:12:11,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2024-10-12 15:12:11,574 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 [2024-10-12 15:12:11,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:12:11,576 INFO L225 Difference]: With dead ends: 603 [2024-10-12 15:12:11,576 INFO L226 Difference]: Without dead ends: 380 [2024-10-12 15:12:11,578 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 [2024-10-12 15:12:11,579 INFO L432 NwaCegarLoop]: 128 mSDtfsCounter, 378 mSDsluCounter, 4231 mSDsCounter, 0 mSdLazyCounter, 6171 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s 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, 2.5s IncrementalHoareTripleChecker+Time [2024-10-12 15:12:11,579 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [378 Valid, 4359 Invalid, 6244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 6171 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2024-10-12 15:12:11,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2024-10-12 15:12:11,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 245. [2024-10-12 15:12:11,599 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) [2024-10-12 15:12:11,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 393 transitions. [2024-10-12 15:12:11,601 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 393 transitions. Word has length 101 [2024-10-12 15:12:11,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:12:11,601 INFO L471 AbstractCegarLoop]: Abstraction has 245 states and 393 transitions. [2024-10-12 15:12:11,601 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) [2024-10-12 15:12:11,601 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 393 transitions. [2024-10-12 15:12:11,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2024-10-12 15:12:11,602 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:12:11,604 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] [2024-10-12 15:12:11,616 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2024-10-12 15:12:11,804 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 [2024-10-12 15:12:11,805 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:12:11,805 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:12:11,806 INFO L85 PathProgramCache]: Analyzing trace with hash 1678978970, now seen corresponding path program 1 times [2024-10-12 15:12:11,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:12:11,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148920771] [2024-10-12 15:12:11,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:12:11,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:12:11,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:12:11,938 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-12 15:12:11,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:12:11,940 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-12 15:12:11,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:12:12,233 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-10-12 15:12:12,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:12:12,236 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2024-10-12 15:12:12,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:12:12,238 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 3 proven. 248 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-10-12 15:12:12,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:12:12,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148920771] [2024-10-12 15:12:12,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148920771] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 15:12:12,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484003885] [2024-10-12 15:12:12,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:12:12,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:12:12,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:12:12,240 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) [2024-10-12 15:12:12,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-10-12 15:12:12,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:12:12,331 INFO L255 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-12 15:12:12,333 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 15:12:12,429 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 263 trivial. 0 not checked. [2024-10-12 15:12:12,429 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-12 15:12:12,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484003885] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 15:12:12,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-12 15:12:12,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [17] total 23 [2024-10-12 15:12:12,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476592715] [2024-10-12 15:12:12,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 15:12:12,430 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-12 15:12:12,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:12:12,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-12 15:12:12,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2024-10-12 15:12:12,431 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) [2024-10-12 15:12:12,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:12:12,493 INFO L93 Difference]: Finished difference Result 300 states and 461 transitions. [2024-10-12 15:12:12,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-12 15:12:12,493 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 [2024-10-12 15:12:12,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:12:12,495 INFO L225 Difference]: With dead ends: 300 [2024-10-12 15:12:12,495 INFO L226 Difference]: Without dead ends: 256 [2024-10-12 15:12:12,495 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 [2024-10-12 15:12:12,496 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 [2024-10-12 15:12:12,496 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] [2024-10-12 15:12:12,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2024-10-12 15:12:12,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 249. [2024-10-12 15:12:12,520 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) [2024-10-12 15:12:12,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 398 transitions. [2024-10-12 15:12:12,521 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 398 transitions. Word has length 104 [2024-10-12 15:12:12,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:12:12,521 INFO L471 AbstractCegarLoop]: Abstraction has 249 states and 398 transitions. [2024-10-12 15:12:12,522 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) [2024-10-12 15:12:12,522 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 398 transitions. [2024-10-12 15:12:12,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2024-10-12 15:12:12,523 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:12:12,523 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] [2024-10-12 15:12:12,535 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2024-10-12 15:12:12,726 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 [2024-10-12 15:12:12,727 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:12:12,727 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:12:12,727 INFO L85 PathProgramCache]: Analyzing trace with hash -315165736, now seen corresponding path program 1 times [2024-10-12 15:12:12,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:12:12,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960715075] [2024-10-12 15:12:12,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:12:12,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:12:12,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:12:12,860 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-12 15:12:12,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:12:12,861 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-12 15:12:12,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:12:13,146 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-10-12 15:12:13,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:12:13,150 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2024-10-12 15:12:13,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:12:13,152 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 3 proven. 248 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-10-12 15:12:13,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:12:13,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960715075] [2024-10-12 15:12:13,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960715075] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 15:12:13,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001076396] [2024-10-12 15:12:13,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:12:13,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:12:13,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:12:13,154 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) [2024-10-12 15:12:13,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-10-12 15:12:13,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:12:13,714 INFO L255 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-10-12 15:12:13,719 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 15:12:13,787 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 263 trivial. 0 not checked. [2024-10-12 15:12:13,787 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-12 15:12:13,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001076396] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 15:12:13,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-12 15:12:13,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [17] total 22 [2024-10-12 15:12:13,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955148260] [2024-10-12 15:12:13,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 15:12:13,788 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-12 15:12:13,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:12:13,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-12 15:12:13,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2024-10-12 15:12:13,788 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) [2024-10-12 15:12:13,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:12:13,837 INFO L93 Difference]: Finished difference Result 297 states and 457 transitions. [2024-10-12 15:12:13,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-12 15:12:13,837 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 [2024-10-12 15:12:13,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:12:13,839 INFO L225 Difference]: With dead ends: 297 [2024-10-12 15:12:13,839 INFO L226 Difference]: Without dead ends: 257 [2024-10-12 15:12:13,839 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 [2024-10-12 15:12:13,840 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 [2024-10-12 15:12:13,840 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] [2024-10-12 15:12:13,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2024-10-12 15:12:13,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 255. [2024-10-12 15:12:13,859 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) [2024-10-12 15:12:13,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 405 transitions. [2024-10-12 15:12:13,860 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 405 transitions. Word has length 104 [2024-10-12 15:12:13,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:12:13,860 INFO L471 AbstractCegarLoop]: Abstraction has 255 states and 405 transitions. [2024-10-12 15:12:13,861 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) [2024-10-12 15:12:13,861 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 405 transitions. [2024-10-12 15:12:13,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2024-10-12 15:12:13,861 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:12:13,862 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] [2024-10-12 15:12:13,875 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2024-10-12 15:12:14,065 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 [2024-10-12 15:12:14,066 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:12:14,066 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:12:14,066 INFO L85 PathProgramCache]: Analyzing trace with hash 775678167, now seen corresponding path program 1 times [2024-10-12 15:12:14,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:12:14,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109396506] [2024-10-12 15:12:14,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:12:14,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:12:14,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:12:14,201 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-12 15:12:14,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:12:14,203 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-12 15:12:14,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:12:14,505 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-10-12 15:12:14,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:12:14,508 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2024-10-12 15:12:14,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:12:14,511 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 3 proven. 248 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-10-12 15:12:14,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:12:14,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109396506] [2024-10-12 15:12:14,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109396506] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 15:12:14,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268708914] [2024-10-12 15:12:14,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:12:14,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:12:14,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:12:14,513 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) [2024-10-12 15:12:14,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-10-12 15:12:14,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:12:14,727 INFO L255 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-10-12 15:12:14,730 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 15:12:14,949 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 263 trivial. 0 not checked. [2024-10-12 15:12:14,950 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-12 15:12:14,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268708914] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 15:12:14,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-12 15:12:14,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [17] total 25 [2024-10-12 15:12:14,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050457898] [2024-10-12 15:12:14,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 15:12:14,950 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-12 15:12:14,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:12:14,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-12 15:12:14,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2024-10-12 15:12:14,951 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) [2024-10-12 15:12:15,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:12:15,066 INFO L93 Difference]: Finished difference Result 285 states and 443 transitions. [2024-10-12 15:12:15,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-12 15:12:15,066 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 [2024-10-12 15:12:15,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:12:15,068 INFO L225 Difference]: With dead ends: 285 [2024-10-12 15:12:15,068 INFO L226 Difference]: Without dead ends: 274 [2024-10-12 15:12:15,068 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2024-10-12 15:12:15,069 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 [2024-10-12 15:12:15,069 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] [2024-10-12 15:12:15,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2024-10-12 15:12:15,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 264. [2024-10-12 15:12:15,096 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) [2024-10-12 15:12:15,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 416 transitions. [2024-10-12 15:12:15,097 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 416 transitions. Word has length 106 [2024-10-12 15:12:15,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:12:15,097 INFO L471 AbstractCegarLoop]: Abstraction has 264 states and 416 transitions. [2024-10-12 15:12:15,098 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) [2024-10-12 15:12:15,098 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 416 transitions. [2024-10-12 15:12:15,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2024-10-12 15:12:15,099 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:12:15,099 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] [2024-10-12 15:12:15,112 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2024-10-12 15:12:15,299 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 [2024-10-12 15:12:15,300 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:12:15,300 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:12:15,300 INFO L85 PathProgramCache]: Analyzing trace with hash 584511477, now seen corresponding path program 1 times [2024-10-12 15:12:15,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:12:15,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973134178] [2024-10-12 15:12:15,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:12:15,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:12:15,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:12:15,424 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-12 15:12:15,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:12:15,426 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-12 15:12:15,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:12:15,709 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-10-12 15:12:15,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:12:15,712 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2024-10-12 15:12:15,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:12:15,714 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 3 proven. 248 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-10-12 15:12:15,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:12:15,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973134178] [2024-10-12 15:12:15,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973134178] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 15:12:15,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385644913] [2024-10-12 15:12:15,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:12:15,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:12:15,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:12:15,716 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) [2024-10-12 15:12:15,717 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-10-12 15:12:15,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:12:15,789 INFO L255 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-10-12 15:12:15,791 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 15:12:16,141 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 17 proven. 6 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2024-10-12 15:12:16,141 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 15:12:16,433 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 258 trivial. 0 not checked. [2024-10-12 15:12:16,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385644913] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 15:12:16,433 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 15:12:16,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13, 12] total 38 [2024-10-12 15:12:16,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616538078] [2024-10-12 15:12:16,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 15:12:16,434 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-10-12 15:12:16,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:12:16,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-10-12 15:12:16,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1306, Unknown=0, NotChecked=0, Total=1406 [2024-10-12 15:12:16,435 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) [2024-10-12 15:12:19,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:12:19,440 INFO L93 Difference]: Finished difference Result 706 states and 1241 transitions. [2024-10-12 15:12:19,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2024-10-12 15:12:19,441 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 [2024-10-12 15:12:19,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:12:19,444 INFO L225 Difference]: With dead ends: 706 [2024-10-12 15:12:19,444 INFO L226 Difference]: Without dead ends: 466 [2024-10-12 15:12:19,446 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 [2024-10-12 15:12:19,447 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 [2024-10-12 15:12:19,447 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] [2024-10-12 15:12:19,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2024-10-12 15:12:19,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 273. [2024-10-12 15:12:19,476 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) [2024-10-12 15:12:19,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 451 transitions. [2024-10-12 15:12:19,491 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 451 transitions. Word has length 106 [2024-10-12 15:12:19,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:12:19,491 INFO L471 AbstractCegarLoop]: Abstraction has 273 states and 451 transitions. [2024-10-12 15:12:19,492 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) [2024-10-12 15:12:19,492 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 451 transitions. [2024-10-12 15:12:19,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2024-10-12 15:12:19,493 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:12:19,493 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] [2024-10-12 15:12:19,506 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2024-10-12 15:12:19,693 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 [2024-10-12 15:12:19,693 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:12:19,694 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:12:19,694 INFO L85 PathProgramCache]: Analyzing trace with hash -758332696, now seen corresponding path program 3 times [2024-10-12 15:12:19,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:12:19,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510245434] [2024-10-12 15:12:19,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:12:19,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:12:19,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:12:19,817 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-12 15:12:19,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:12:19,818 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-12 15:12:19,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:12:20,193 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2024-10-12 15:12:20,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:12:20,195 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2024-10-12 15:12:20,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:12:20,197 INFO L134 CoverageAnalysis]: Checked inductivity of 762 backedges. 3 proven. 744 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-12 15:12:20,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:12:20,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510245434] [2024-10-12 15:12:20,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510245434] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 15:12:20,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939449513] [2024-10-12 15:12:20,197 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-12 15:12:20,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:12:20,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:12:20,199 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) [2024-10-12 15:12:20,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-10-12 15:12:20,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) [2024-10-12 15:12:20,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 15:12:20,284 INFO L255 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-10-12 15:12:20,285 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 15:12:20,658 INFO L134 CoverageAnalysis]: Checked inductivity of 762 backedges. 20 proven. 737 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-12 15:12:20,658 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 15:12:21,524 INFO L134 CoverageAnalysis]: Checked inductivity of 762 backedges. 3 proven. 744 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-12 15:12:21,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939449513] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 15:12:21,524 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 15:12:21,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 74 [2024-10-12 15:12:21,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328883434] [2024-10-12 15:12:21,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 15:12:21,525 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2024-10-12 15:12:21,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:12:21,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2024-10-12 15:12:21,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1846, Invalid=3556, Unknown=0, NotChecked=0, Total=5402 [2024-10-12 15:12:21,526 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) [2024-10-12 15:12:22,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:12:22,022 INFO L93 Difference]: Finished difference Result 878 states and 1313 transitions. [2024-10-12 15:12:22,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2024-10-12 15:12:22,023 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 [2024-10-12 15:12:22,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:12:22,026 INFO L225 Difference]: With dead ends: 878 [2024-10-12 15:12:22,026 INFO L226 Difference]: Without dead ends: 655 [2024-10-12 15:12:22,027 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2287 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1917, Invalid=3633, Unknown=0, NotChecked=0, Total=5550 [2024-10-12 15:12:22,028 INFO L432 NwaCegarLoop]: 76 mSDtfsCounter, 1411 mSDsluCounter, 853 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2024-10-12 15:12:22,028 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] [2024-10-12 15:12:22,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2024-10-12 15:12:22,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 335. [2024-10-12 15:12:22,056 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) [2024-10-12 15:12:22,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 554 transitions. [2024-10-12 15:12:22,057 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 554 transitions. Word has length 110 [2024-10-12 15:12:22,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:12:22,058 INFO L471 AbstractCegarLoop]: Abstraction has 335 states and 554 transitions. [2024-10-12 15:12:22,058 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) [2024-10-12 15:12:22,058 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 554 transitions. [2024-10-12 15:12:22,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2024-10-12 15:12:22,059 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:12:22,059 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] [2024-10-12 15:12:22,075 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2024-10-12 15:12:22,260 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 [2024-10-12 15:12:22,260 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:12:22,260 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:12:22,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1083240113, now seen corresponding path program 1 times [2024-10-12 15:12:22,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:12:22,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679026324] [2024-10-12 15:12:22,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:12:22,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:12:22,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:12:22,399 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-12 15:12:22,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:12:22,400 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-12 15:12:22,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:12:22,704 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-10-12 15:12:22,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:12:22,707 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2024-10-12 15:12:22,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:12:22,710 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 3 proven. 293 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-10-12 15:12:22,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:12:22,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679026324] [2024-10-12 15:12:22,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679026324] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 15:12:22,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834539918] [2024-10-12 15:12:22,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:12:22,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:12:22,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:12:22,712 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) [2024-10-12 15:12:22,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-10-12 15:12:22,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:12:22,864 INFO L255 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 105 conjuncts are in the unsatisfiable core [2024-10-12 15:12:22,867 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 15:12:24,660 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 9 proven. 289 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-10-12 15:12:24,661 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 15:12:28,181 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 26 proven. 288 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-12 15:12:28,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834539918] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 15:12:28,181 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 15:12:28,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 35, 40] total 89 [2024-10-12 15:12:28,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089403916] [2024-10-12 15:12:28,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 15:12:28,182 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2024-10-12 15:12:28,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:12:28,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2024-10-12 15:12:28,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=7331, Unknown=0, NotChecked=0, Total=7832 [2024-10-12 15:12:28,184 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)