./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/bitvector/soft_float_4-2a.c.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8fc3dc66 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/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_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/bitvector/soft_float_4-2a.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 2abfa4882ab8ec6bd7a33a5fbeaa8a88ba40a897019218fc162e52833c89454b --- Real Ultimate output --- This is Ultimate 0.3.0-?-8fc3dc6-m [2025-03-16 14:03:36,565 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-16 14:03:36,620 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-16 14:03:36,628 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-16 14:03:36,628 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-16 14:03:36,652 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-16 14:03:36,654 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-16 14:03:36,654 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-16 14:03:36,654 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-16 14:03:36,654 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-16 14:03:36,655 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-16 14:03:36,655 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-16 14:03:36,656 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-16 14:03:36,656 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-16 14:03:36,656 INFO L153 SettingsManager]: * Use SBE=true [2025-03-16 14:03:36,656 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-16 14:03:36,656 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-16 14:03:36,656 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-16 14:03:36,657 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-16 14:03:36,657 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-16 14:03:36,657 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-16 14:03:36,657 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-16 14:03:36,657 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-16 14:03:36,657 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-16 14:03:36,657 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-16 14:03:36,657 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-16 14:03:36,657 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-16 14:03:36,657 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-16 14:03:36,657 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-16 14:03:36,657 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-16 14:03:36,658 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-16 14:03:36,658 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-16 14:03:36,658 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-16 14:03:36,658 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-16 14:03:36,658 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-16 14:03:36,658 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-16 14:03:36,658 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-16 14:03:36,659 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-16 14:03:36,659 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-16 14:03:36,659 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-16 14:03:36,659 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-16 14:03:36,659 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-16 14:03:36,659 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-16 14:03:36,659 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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 -> 2abfa4882ab8ec6bd7a33a5fbeaa8a88ba40a897019218fc162e52833c89454b [2025-03-16 14:03:36,882 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-16 14:03:36,889 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-16 14:03:36,892 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-16 14:03:36,894 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-16 14:03:36,894 INFO L274 PluginConnector]: CDTParser initialized [2025-03-16 14:03:36,895 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/bitvector/soft_float_4-2a.c.cil.c [2025-03-16 14:03:37,983 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/28c959d18/cc0657e1052a4df6a087df0a6d74a8c2/FLAGd9a5fa57c [2025-03-16 14:03:38,227 INFO L384 CDTParser]: Found 1 translation units. [2025-03-16 14:03:38,227 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/soft_float_4-2a.c.cil.c [2025-03-16 14:03:38,240 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/28c959d18/cc0657e1052a4df6a087df0a6d74a8c2/FLAGd9a5fa57c [2025-03-16 14:03:38,256 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/28c959d18/cc0657e1052a4df6a087df0a6d74a8c2 [2025-03-16 14:03:38,259 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-16 14:03:38,260 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-16 14:03:38,263 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-16 14:03:38,263 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-16 14:03:38,266 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-16 14:03:38,266 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.03 02:03:38" (1/1) ... [2025-03-16 14:03:38,267 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4014dc46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 02:03:38, skipping insertion in model container [2025-03-16 14:03:38,267 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.03 02:03:38" (1/1) ... [2025-03-16 14:03:38,285 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-16 14:03:38,386 WARN L250 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_4-2a.c.cil.c[755,768] [2025-03-16 14:03:38,413 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-16 14:03:38,420 INFO L200 MainTranslator]: Completed pre-run [2025-03-16 14:03:38,426 WARN L250 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_4-2a.c.cil.c[755,768] [2025-03-16 14:03:38,442 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-16 14:03:38,451 INFO L204 MainTranslator]: Completed translation [2025-03-16 14:03:38,452 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 02:03:38 WrapperNode [2025-03-16 14:03:38,452 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-16 14:03:38,453 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-16 14:03:38,453 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-16 14:03:38,453 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-16 14:03:38,457 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 02:03:38" (1/1) ... [2025-03-16 14:03:38,465 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 02:03:38" (1/1) ... [2025-03-16 14:03:38,482 INFO L138 Inliner]: procedures = 17, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 56 [2025-03-16 14:03:38,482 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-16 14:03:38,483 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-16 14:03:38,483 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-16 14:03:38,483 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-16 14:03:38,489 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 02:03:38" (1/1) ... [2025-03-16 14:03:38,489 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 02:03:38" (1/1) ... [2025-03-16 14:03:38,493 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 02:03:38" (1/1) ... [2025-03-16 14:03:38,508 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]. [2025-03-16 14:03:38,511 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 02:03:38" (1/1) ... [2025-03-16 14:03:38,512 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 02:03:38" (1/1) ... [2025-03-16 14:03:38,514 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 02:03:38" (1/1) ... [2025-03-16 14:03:38,519 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 02:03:38" (1/1) ... [2025-03-16 14:03:38,520 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 02:03:38" (1/1) ... [2025-03-16 14:03:38,520 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 02:03:38" (1/1) ... [2025-03-16 14:03:38,521 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-16 14:03:38,522 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-16 14:03:38,522 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-16 14:03:38,522 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-16 14:03:38,523 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 02:03:38" (1/1) ... [2025-03-16 14:03:38,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-16 14:03:38,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:03:38,549 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) [2025-03-16 14:03:38,553 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 [2025-03-16 14:03:38,568 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-16 14:03:38,568 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-16 14:03:38,569 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2025-03-16 14:03:38,569 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2025-03-16 14:03:38,569 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-16 14:03:38,569 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-16 14:03:38,569 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2025-03-16 14:03:38,569 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2025-03-16 14:03:38,569 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2025-03-16 14:03:38,569 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2025-03-16 14:03:38,616 INFO L256 CfgBuilder]: Building ICFG [2025-03-16 14:03:38,617 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-16 14:03:38,893 INFO L? ?]: Removed 51 outVars from TransFormulas that were not future-live. [2025-03-16 14:03:38,896 INFO L307 CfgBuilder]: Performing block encoding [2025-03-16 14:03:38,920 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-16 14:03:38,921 INFO L336 CfgBuilder]: Removed 1 assume(true) statements. [2025-03-16 14:03:38,921 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.03 02:03:38 BoogieIcfgContainer [2025-03-16 14:03:38,921 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-16 14:03:38,923 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-16 14:03:38,924 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-16 14:03:38,927 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-16 14:03:38,927 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.03 02:03:38" (1/3) ... [2025-03-16 14:03:38,928 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a69de18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.03 02:03:38, skipping insertion in model container [2025-03-16 14:03:38,928 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 02:03:38" (2/3) ... [2025-03-16 14:03:38,929 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a69de18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.03 02:03:38, skipping insertion in model container [2025-03-16 14:03:38,929 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.03 02:03:38" (3/3) ... [2025-03-16 14:03:38,930 INFO L128 eAbstractionObserver]: Analyzing ICFG soft_float_4-2a.c.cil.c [2025-03-16 14:03:38,939 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-16 14:03:38,940 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG soft_float_4-2a.c.cil.c that has 4 procedures, 74 locations, 1 initial locations, 2 loop locations, and 1 error locations. [2025-03-16 14:03:38,979 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-16 14:03:38,989 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;@386f0536, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-16 14:03:38,989 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-16 14:03:38,992 INFO L276 IsEmpty]: Start isEmpty. Operand has 74 states, 61 states have (on average 1.5081967213114753) internal successors, (92), 62 states have internal predecessors, (92), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2025-03-16 14:03:38,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2025-03-16 14:03:38,998 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:03:38,999 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:03:38,999 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:03:39,002 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:03:39,003 INFO L85 PathProgramCache]: Analyzing trace with hash 1757419105, now seen corresponding path program 1 times [2025-03-16 14:03:39,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:03:39,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647803435] [2025-03-16 14:03:39,008 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:39,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:03:39,070 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 34 statements into 1 equivalence classes. [2025-03-16 14:03:39,114 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 34 of 34 statements. [2025-03-16 14:03:39,114 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:39,114 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:39,509 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-03-16 14:03:39,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:03:39,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647803435] [2025-03-16 14:03:39,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647803435] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 14:03:39,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601112122] [2025-03-16 14:03:39,512 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:39,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:03:39,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:03:39,514 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) [2025-03-16 14:03:39,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-16 14:03:39,559 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 34 statements into 1 equivalence classes. [2025-03-16 14:03:39,584 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 34 of 34 statements. [2025-03-16 14:03:39,584 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:39,584 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:39,586 INFO L256 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-03-16 14:03:39,591 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:03:39,663 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-03-16 14:03:39,664 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-16 14:03:39,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601112122] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:03:39,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-16 14:03:39,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 12 [2025-03-16 14:03:39,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064524172] [2025-03-16 14:03:39,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:03:39,671 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-16 14:03:39,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:03:39,687 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-16 14:03:39,689 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2025-03-16 14:03:39,691 INFO L87 Difference]: Start difference. First operand has 74 states, 61 states have (on average 1.5081967213114753) internal successors, (92), 62 states have internal predecessors, (92), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 8 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-16 14:03:39,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:03:39,825 INFO L93 Difference]: Finished difference Result 165 states and 251 transitions. [2025-03-16 14:03:39,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-16 14:03:39,829 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 34 [2025-03-16 14:03:39,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:03:39,833 INFO L225 Difference]: With dead ends: 165 [2025-03-16 14:03:39,833 INFO L226 Difference]: Without dead ends: 89 [2025-03-16 14:03:39,835 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2025-03-16 14:03:39,837 INFO L435 NwaCegarLoop]: 89 mSDtfsCounter, 13 mSDsluCounter, 523 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 612 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 14:03:39,837 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 612 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 14:03:39,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2025-03-16 14:03:39,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 82. [2025-03-16 14:03:39,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 67 states have (on average 1.373134328358209) internal successors, (92), 69 states have internal predecessors, (92), 9 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (11), 8 states have call predecessors, (11), 8 states have call successors, (11) [2025-03-16 14:03:39,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 112 transitions. [2025-03-16 14:03:39,865 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 112 transitions. Word has length 34 [2025-03-16 14:03:39,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:03:39,866 INFO L471 AbstractCegarLoop]: Abstraction has 82 states and 112 transitions. [2025-03-16 14:03:39,866 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-16 14:03:39,866 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 112 transitions. [2025-03-16 14:03:39,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2025-03-16 14:03:39,867 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:03:39,867 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 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] [2025-03-16 14:03:39,873 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-16 14:03:40,068 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2025-03-16 14:03:40,068 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:03:40,069 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:03:40,069 INFO L85 PathProgramCache]: Analyzing trace with hash -700805848, now seen corresponding path program 1 times [2025-03-16 14:03:40,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:03:40,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811332698] [2025-03-16 14:03:40,069 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:40,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:03:40,076 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-03-16 14:03:40,093 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-03-16 14:03:40,093 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:40,093 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:40,233 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-03-16 14:03:40,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:03:40,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811332698] [2025-03-16 14:03:40,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811332698] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 14:03:40,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049313742] [2025-03-16 14:03:40,233 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:40,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:03:40,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:03:40,237 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) [2025-03-16 14:03:40,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-16 14:03:40,283 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-03-16 14:03:40,304 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-03-16 14:03:40,304 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:40,304 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:40,308 INFO L256 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-03-16 14:03:40,312 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:03:40,337 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-03-16 14:03:40,338 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 14:03:40,462 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-03-16 14:03:40,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049313742] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 14:03:40,463 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 14:03:40,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2025-03-16 14:03:40,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150517880] [2025-03-16 14:03:40,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 14:03:40,464 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-16 14:03:40,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:03:40,466 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-16 14:03:40,466 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2025-03-16 14:03:40,466 INFO L87 Difference]: Start difference. First operand 82 states and 112 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 12 states have internal predecessors, (33), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2025-03-16 14:03:40,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:03:40,625 INFO L93 Difference]: Finished difference Result 153 states and 207 transitions. [2025-03-16 14:03:40,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-16 14:03:40,625 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 12 states have internal predecessors, (33), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 37 [2025-03-16 14:03:40,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:03:40,626 INFO L225 Difference]: With dead ends: 153 [2025-03-16 14:03:40,626 INFO L226 Difference]: Without dead ends: 108 [2025-03-16 14:03:40,627 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2025-03-16 14:03:40,627 INFO L435 NwaCegarLoop]: 86 mSDtfsCounter, 22 mSDsluCounter, 928 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 1014 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 14:03:40,628 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 1014 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 14:03:40,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2025-03-16 14:03:40,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 92. [2025-03-16 14:03:40,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 74 states have (on average 1.3513513513513513) internal successors, (100), 76 states have internal predecessors, (100), 11 states have call successors, (11), 5 states have call predecessors, (11), 6 states have return successors, (14), 10 states have call predecessors, (14), 10 states have call successors, (14) [2025-03-16 14:03:40,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 125 transitions. [2025-03-16 14:03:40,642 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 125 transitions. Word has length 37 [2025-03-16 14:03:40,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:03:40,642 INFO L471 AbstractCegarLoop]: Abstraction has 92 states and 125 transitions. [2025-03-16 14:03:40,642 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 12 states have internal predecessors, (33), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2025-03-16 14:03:40,642 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 125 transitions. [2025-03-16 14:03:40,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2025-03-16 14:03:40,643 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:03:40,643 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:03:40,650 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-03-16 14:03:40,848 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,SelfDestructingSolverStorable1 [2025-03-16 14:03:40,848 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:03:40,848 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:03:40,849 INFO L85 PathProgramCache]: Analyzing trace with hash 1985381861, now seen corresponding path program 2 times [2025-03-16 14:03:40,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:03:40,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979942538] [2025-03-16 14:03:40,849 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 14:03:40,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:03:40,855 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 40 statements into 2 equivalence classes. [2025-03-16 14:03:40,867 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 23 of 40 statements. [2025-03-16 14:03:40,867 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-16 14:03:40,867 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:41,000 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-16 14:03:41,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:03:41,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979942538] [2025-03-16 14:03:41,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979942538] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:03:41,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 14:03:41,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2025-03-16 14:03:41,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210641681] [2025-03-16 14:03:41,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:03:41,001 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-16 14:03:41,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:03:41,002 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-16 14:03:41,002 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2025-03-16 14:03:41,002 INFO L87 Difference]: Start difference. First operand 92 states and 125 transitions. Second operand has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-16 14:03:41,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:03:41,219 INFO L93 Difference]: Finished difference Result 223 states and 306 transitions. [2025-03-16 14:03:41,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-16 14:03:41,219 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 40 [2025-03-16 14:03:41,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:03:41,221 INFO L225 Difference]: With dead ends: 223 [2025-03-16 14:03:41,221 INFO L226 Difference]: Without dead ends: 174 [2025-03-16 14:03:41,221 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2025-03-16 14:03:41,222 INFO L435 NwaCegarLoop]: 156 mSDtfsCounter, 113 mSDsluCounter, 1112 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 1268 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-16 14:03:41,222 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 1268 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-16 14:03:41,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2025-03-16 14:03:41,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 139. [2025-03-16 14:03:41,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 114 states have (on average 1.3333333333333333) internal successors, (152), 117 states have internal predecessors, (152), 15 states have call successors, (15), 7 states have call predecessors, (15), 9 states have return successors, (22), 14 states have call predecessors, (22), 14 states have call successors, (22) [2025-03-16 14:03:41,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 189 transitions. [2025-03-16 14:03:41,242 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 189 transitions. Word has length 40 [2025-03-16 14:03:41,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:03:41,242 INFO L471 AbstractCegarLoop]: Abstraction has 139 states and 189 transitions. [2025-03-16 14:03:41,242 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-16 14:03:41,242 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 189 transitions. [2025-03-16 14:03:41,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2025-03-16 14:03:41,246 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:03:41,246 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:03:41,246 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-16 14:03:41,246 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:03:41,246 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:03:41,246 INFO L85 PathProgramCache]: Analyzing trace with hash 1788868356, now seen corresponding path program 1 times [2025-03-16 14:03:41,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:03:41,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222771894] [2025-03-16 14:03:41,247 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:41,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:03:41,252 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 40 statements into 1 equivalence classes. [2025-03-16 14:03:41,274 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 40 of 40 statements. [2025-03-16 14:03:41,274 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:41,274 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:41,637 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-16 14:03:41,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:03:41,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222771894] [2025-03-16 14:03:41,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222771894] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:03:41,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 14:03:41,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2025-03-16 14:03:41,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457055029] [2025-03-16 14:03:41,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:03:41,639 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-16 14:03:41,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:03:41,639 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-16 14:03:41,639 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2025-03-16 14:03:41,640 INFO L87 Difference]: Start difference. First operand 139 states and 189 transitions. Second operand has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 10 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-16 14:03:41,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:03:41,872 INFO L93 Difference]: Finished difference Result 161 states and 215 transitions. [2025-03-16 14:03:41,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-16 14:03:41,873 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 10 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 40 [2025-03-16 14:03:41,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:03:41,874 INFO L225 Difference]: With dead ends: 161 [2025-03-16 14:03:41,875 INFO L226 Difference]: Without dead ends: 159 [2025-03-16 14:03:41,875 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2025-03-16 14:03:41,876 INFO L435 NwaCegarLoop]: 144 mSDtfsCounter, 69 mSDsluCounter, 1449 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 1593 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-16 14:03:41,877 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 1593 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-16 14:03:41,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2025-03-16 14:03:41,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 151. [2025-03-16 14:03:41,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 124 states have (on average 1.314516129032258) internal successors, (163), 128 states have internal predecessors, (163), 16 states have call successors, (16), 8 states have call predecessors, (16), 10 states have return successors, (23), 14 states have call predecessors, (23), 15 states have call successors, (23) [2025-03-16 14:03:41,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 202 transitions. [2025-03-16 14:03:41,894 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 202 transitions. Word has length 40 [2025-03-16 14:03:41,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:03:41,894 INFO L471 AbstractCegarLoop]: Abstraction has 151 states and 202 transitions. [2025-03-16 14:03:41,894 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 10 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-16 14:03:41,894 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 202 transitions. [2025-03-16 14:03:41,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2025-03-16 14:03:41,895 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:03:41,895 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2025-03-16 14:03:41,895 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-03-16 14:03:41,895 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:03:41,896 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:03:41,897 INFO L85 PathProgramCache]: Analyzing trace with hash -429972995, now seen corresponding path program 1 times [2025-03-16 14:03:41,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:03:41,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675377457] [2025-03-16 14:03:41,897 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:41,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:03:41,905 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 42 statements into 1 equivalence classes. [2025-03-16 14:03:41,913 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 42 of 42 statements. [2025-03-16 14:03:41,916 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:41,916 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:42,022 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-03-16 14:03:42,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:03:42,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675377457] [2025-03-16 14:03:42,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675377457] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:03:42,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 14:03:42,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-03-16 14:03:42,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307618354] [2025-03-16 14:03:42,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:03:42,023 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-16 14:03:42,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:03:42,024 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-16 14:03:42,024 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2025-03-16 14:03:42,024 INFO L87 Difference]: Start difference. First operand 151 states and 202 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 7 states have internal predecessors, (27), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-16 14:03:42,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:03:42,116 INFO L93 Difference]: Finished difference Result 234 states and 315 transitions. [2025-03-16 14:03:42,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-16 14:03:42,116 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 7 states have internal predecessors, (27), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 42 [2025-03-16 14:03:42,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:03:42,117 INFO L225 Difference]: With dead ends: 234 [2025-03-16 14:03:42,117 INFO L226 Difference]: Without dead ends: 194 [2025-03-16 14:03:42,118 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2025-03-16 14:03:42,118 INFO L435 NwaCegarLoop]: 90 mSDtfsCounter, 85 mSDsluCounter, 611 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 701 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 14:03:42,118 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 701 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 14:03:42,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2025-03-16 14:03:42,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 186. [2025-03-16 14:03:42,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 155 states have (on average 1.3290322580645162) internal successors, (206), 159 states have internal predecessors, (206), 19 states have call successors, (19), 9 states have call predecessors, (19), 11 states have return successors, (26), 17 states have call predecessors, (26), 18 states have call successors, (26) [2025-03-16 14:03:42,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 251 transitions. [2025-03-16 14:03:42,136 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 251 transitions. Word has length 42 [2025-03-16 14:03:42,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:03:42,136 INFO L471 AbstractCegarLoop]: Abstraction has 186 states and 251 transitions. [2025-03-16 14:03:42,136 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 7 states have internal predecessors, (27), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-16 14:03:42,136 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 251 transitions. [2025-03-16 14:03:42,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2025-03-16 14:03:42,138 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:03:42,138 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:03:42,138 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-03-16 14:03:42,138 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:03:42,139 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:03:42,139 INFO L85 PathProgramCache]: Analyzing trace with hash -626486500, now seen corresponding path program 1 times [2025-03-16 14:03:42,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:03:42,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614725660] [2025-03-16 14:03:42,139 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:42,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:03:42,144 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 42 statements into 1 equivalence classes. [2025-03-16 14:03:42,149 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 42 of 42 statements. [2025-03-16 14:03:42,150 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:42,150 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:42,235 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-03-16 14:03:42,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:03:42,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614725660] [2025-03-16 14:03:42,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614725660] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 14:03:42,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208590492] [2025-03-16 14:03:42,236 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:42,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:03:42,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:03:42,238 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) [2025-03-16 14:03:42,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-16 14:03:42,265 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 42 statements into 1 equivalence classes. [2025-03-16 14:03:42,280 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 42 of 42 statements. [2025-03-16 14:03:42,281 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:42,281 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:42,284 INFO L256 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-16 14:03:42,292 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:03:42,316 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-03-16 14:03:42,316 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 14:03:42,423 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-03-16 14:03:42,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208590492] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 14:03:42,423 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 14:03:42,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2025-03-16 14:03:42,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602578609] [2025-03-16 14:03:42,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 14:03:42,424 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-16 14:03:42,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:03:42,425 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-16 14:03:42,425 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2025-03-16 14:03:42,425 INFO L87 Difference]: Start difference. First operand 186 states and 251 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 10 states have internal predecessors, (36), 4 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2025-03-16 14:03:42,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:03:42,515 INFO L93 Difference]: Finished difference Result 280 states and 378 transitions. [2025-03-16 14:03:42,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-16 14:03:42,515 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 10 states have internal predecessors, (36), 4 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 42 [2025-03-16 14:03:42,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:03:42,517 INFO L225 Difference]: With dead ends: 280 [2025-03-16 14:03:42,517 INFO L226 Difference]: Without dead ends: 209 [2025-03-16 14:03:42,517 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2025-03-16 14:03:42,518 INFO L435 NwaCegarLoop]: 91 mSDtfsCounter, 11 mSDsluCounter, 877 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 968 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 14:03:42,518 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 968 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 14:03:42,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2025-03-16 14:03:42,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 196. [2025-03-16 14:03:42,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 162 states have (on average 1.3148148148148149) internal successors, (213), 166 states have internal predecessors, (213), 21 states have call successors, (21), 10 states have call predecessors, (21), 12 states have return successors, (28), 19 states have call predecessors, (28), 20 states have call successors, (28) [2025-03-16 14:03:42,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 262 transitions. [2025-03-16 14:03:42,533 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 262 transitions. Word has length 42 [2025-03-16 14:03:42,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:03:42,533 INFO L471 AbstractCegarLoop]: Abstraction has 196 states and 262 transitions. [2025-03-16 14:03:42,534 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 10 states have internal predecessors, (36), 4 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2025-03-16 14:03:42,534 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 262 transitions. [2025-03-16 14:03:42,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2025-03-16 14:03:42,535 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:03:42,535 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:03:42,541 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-03-16 14:03:42,739 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:03:42,739 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:03:42,739 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:03:42,739 INFO L85 PathProgramCache]: Analyzing trace with hash -1494299792, now seen corresponding path program 1 times [2025-03-16 14:03:42,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:03:42,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506633430] [2025-03-16 14:03:42,740 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:42,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:03:42,743 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 43 statements into 1 equivalence classes. [2025-03-16 14:03:42,750 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 43 of 43 statements. [2025-03-16 14:03:42,750 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:42,751 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:42,942 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-16 14:03:42,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:03:42,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506633430] [2025-03-16 14:03:42,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506633430] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:03:42,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 14:03:42,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2025-03-16 14:03:42,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123009049] [2025-03-16 14:03:42,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:03:42,943 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-03-16 14:03:42,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:03:42,944 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-03-16 14:03:42,944 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2025-03-16 14:03:42,944 INFO L87 Difference]: Start difference. First operand 196 states and 262 transitions. Second operand has 15 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 5 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2025-03-16 14:03:43,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:03:43,144 INFO L93 Difference]: Finished difference Result 282 states and 376 transitions. [2025-03-16 14:03:43,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-16 14:03:43,144 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 5 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 43 [2025-03-16 14:03:43,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:03:43,146 INFO L225 Difference]: With dead ends: 282 [2025-03-16 14:03:43,147 INFO L226 Difference]: Without dead ends: 274 [2025-03-16 14:03:43,147 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2025-03-16 14:03:43,148 INFO L435 NwaCegarLoop]: 84 mSDtfsCounter, 57 mSDsluCounter, 899 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 983 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 14:03:43,149 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 983 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 349 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 14:03:43,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2025-03-16 14:03:43,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 201. [2025-03-16 14:03:43,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 166 states have (on average 1.3072289156626506) internal successors, (217), 169 states have internal predecessors, (217), 22 states have call successors, (22), 10 states have call predecessors, (22), 12 states have return successors, (29), 21 states have call predecessors, (29), 21 states have call successors, (29) [2025-03-16 14:03:43,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 268 transitions. [2025-03-16 14:03:43,167 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 268 transitions. Word has length 43 [2025-03-16 14:03:43,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:03:43,167 INFO L471 AbstractCegarLoop]: Abstraction has 201 states and 268 transitions. [2025-03-16 14:03:43,167 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 5 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2025-03-16 14:03:43,167 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 268 transitions. [2025-03-16 14:03:43,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2025-03-16 14:03:43,172 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:03:43,172 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:03:43,172 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2025-03-16 14:03:43,172 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:03:43,172 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:03:43,172 INFO L85 PathProgramCache]: Analyzing trace with hash -254313702, now seen corresponding path program 1 times [2025-03-16 14:03:43,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:03:43,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952466727] [2025-03-16 14:03:43,172 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:43,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:03:43,177 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 42 statements into 1 equivalence classes. [2025-03-16 14:03:43,186 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 42 of 42 statements. [2025-03-16 14:03:43,187 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:43,188 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:43,272 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-16 14:03:43,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:03:43,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952466727] [2025-03-16 14:03:43,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952466727] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 14:03:43,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994353961] [2025-03-16 14:03:43,272 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:43,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:03:43,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:03:43,274 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) [2025-03-16 14:03:43,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-16 14:03:43,301 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 42 statements into 1 equivalence classes. [2025-03-16 14:03:43,314 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 42 of 42 statements. [2025-03-16 14:03:43,314 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:43,314 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:43,315 INFO L256 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 25 conjuncts are in the unsatisfiable core [2025-03-16 14:03:43,316 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:03:43,373 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-16 14:03:43,373 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-16 14:03:43,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994353961] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:03:43,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-16 14:03:43,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [8] total 12 [2025-03-16 14:03:43,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596045485] [2025-03-16 14:03:43,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:03:43,374 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-16 14:03:43,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:03:43,374 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-16 14:03:43,374 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2025-03-16 14:03:43,375 INFO L87 Difference]: Start difference. First operand 201 states and 268 transitions. Second operand has 10 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2025-03-16 14:03:43,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:03:43,473 INFO L93 Difference]: Finished difference Result 364 states and 497 transitions. [2025-03-16 14:03:43,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-16 14:03:43,473 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 42 [2025-03-16 14:03:43,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:03:43,475 INFO L225 Difference]: With dead ends: 364 [2025-03-16 14:03:43,475 INFO L226 Difference]: Without dead ends: 289 [2025-03-16 14:03:43,475 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2025-03-16 14:03:43,476 INFO L435 NwaCegarLoop]: 119 mSDtfsCounter, 61 mSDsluCounter, 791 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 910 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 14:03:43,476 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 910 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 14:03:43,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2025-03-16 14:03:43,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 271. [2025-03-16 14:03:43,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 227 states have (on average 1.3127753303964758) internal successors, (298), 230 states have internal predecessors, (298), 29 states have call successors, (29), 12 states have call predecessors, (29), 14 states have return successors, (38), 28 states have call predecessors, (38), 28 states have call successors, (38) [2025-03-16 14:03:43,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 365 transitions. [2025-03-16 14:03:43,487 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 365 transitions. Word has length 42 [2025-03-16 14:03:43,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:03:43,487 INFO L471 AbstractCegarLoop]: Abstraction has 271 states and 365 transitions. [2025-03-16 14:03:43,487 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2025-03-16 14:03:43,488 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 365 transitions. [2025-03-16 14:03:43,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2025-03-16 14:03:43,488 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:03:43,488 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:03:43,494 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-03-16 14:03:43,693 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:03:43,693 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:03:43,694 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:03:43,694 INFO L85 PathProgramCache]: Analyzing trace with hash -1963701536, now seen corresponding path program 1 times [2025-03-16 14:03:43,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:03:43,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051660046] [2025-03-16 14:03:43,694 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:43,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:03:43,698 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 43 statements into 1 equivalence classes. [2025-03-16 14:03:43,700 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 43 of 43 statements. [2025-03-16 14:03:43,700 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:43,700 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:43,733 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-03-16 14:03:43,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:03:43,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051660046] [2025-03-16 14:03:43,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051660046] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:03:43,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 14:03:43,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-16 14:03:43,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665276642] [2025-03-16 14:03:43,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:03:43,734 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-16 14:03:43,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:03:43,734 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-16 14:03:43,734 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-16 14:03:43,735 INFO L87 Difference]: Start difference. First operand 271 states and 365 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, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-16 14:03:43,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:03:43,776 INFO L93 Difference]: Finished difference Result 546 states and 743 transitions. [2025-03-16 14:03:43,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-16 14:03:43,776 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, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 43 [2025-03-16 14:03:43,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:03:43,778 INFO L225 Difference]: With dead ends: 546 [2025-03-16 14:03:43,778 INFO L226 Difference]: Without dead ends: 277 [2025-03-16 14:03:43,779 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-16 14:03:43,779 INFO L435 NwaCegarLoop]: 87 mSDtfsCounter, 9 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 14:03:43,779 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 161 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 14:03:43,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2025-03-16 14:03:43,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 273. [2025-03-16 14:03:43,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 229 states have (on average 1.314410480349345) internal successors, (301), 232 states have internal predecessors, (301), 29 states have call successors, (29), 12 states have call predecessors, (29), 14 states have return successors, (38), 28 states have call predecessors, (38), 28 states have call successors, (38) [2025-03-16 14:03:43,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 368 transitions. [2025-03-16 14:03:43,795 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 368 transitions. Word has length 43 [2025-03-16 14:03:43,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:03:43,796 INFO L471 AbstractCegarLoop]: Abstraction has 273 states and 368 transitions. [2025-03-16 14:03:43,796 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, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-16 14:03:43,796 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 368 transitions. [2025-03-16 14:03:43,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2025-03-16 14:03:43,798 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:03:43,798 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:03:43,798 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2025-03-16 14:03:43,798 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:03:43,798 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:03:43,798 INFO L85 PathProgramCache]: Analyzing trace with hash -317096366, now seen corresponding path program 1 times [2025-03-16 14:03:43,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:03:43,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555509157] [2025-03-16 14:03:43,798 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:43,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:03:43,803 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 45 statements into 1 equivalence classes. [2025-03-16 14:03:43,807 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 45 of 45 statements. [2025-03-16 14:03:43,807 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:43,807 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:43,848 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-03-16 14:03:43,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:03:43,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555509157] [2025-03-16 14:03:43,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555509157] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:03:43,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 14:03:43,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-16 14:03:43,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502300356] [2025-03-16 14:03:43,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:03:43,849 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-16 14:03:43,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:03:43,849 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-16 14:03:43,849 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-03-16 14:03:43,849 INFO L87 Difference]: Start difference. First operand 273 states and 368 transitions. Second operand has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2025-03-16 14:03:43,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:03:43,891 INFO L93 Difference]: Finished difference Result 281 states and 375 transitions. [2025-03-16 14:03:43,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-16 14:03:43,892 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 45 [2025-03-16 14:03:43,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:03:43,893 INFO L225 Difference]: With dead ends: 281 [2025-03-16 14:03:43,893 INFO L226 Difference]: Without dead ends: 266 [2025-03-16 14:03:43,893 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2025-03-16 14:03:43,894 INFO L435 NwaCegarLoop]: 89 mSDtfsCounter, 3 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 14:03:43,895 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 437 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 14:03:43,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2025-03-16 14:03:43,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 266. [2025-03-16 14:03:43,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 224 states have (on average 1.3169642857142858) internal successors, (295), 228 states have internal predecessors, (295), 27 states have call successors, (27), 12 states have call predecessors, (27), 14 states have return successors, (35), 25 states have call predecessors, (35), 26 states have call successors, (35) [2025-03-16 14:03:43,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 357 transitions. [2025-03-16 14:03:43,907 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 357 transitions. Word has length 45 [2025-03-16 14:03:43,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:03:43,907 INFO L471 AbstractCegarLoop]: Abstraction has 266 states and 357 transitions. [2025-03-16 14:03:43,907 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2025-03-16 14:03:43,907 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 357 transitions. [2025-03-16 14:03:43,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2025-03-16 14:03:43,909 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:03:43,909 INFO L218 NwaCegarLoop]: trace histogram [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] [2025-03-16 14:03:43,910 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2025-03-16 14:03:43,910 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:03:43,910 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:03:43,910 INFO L85 PathProgramCache]: Analyzing trace with hash -2016704385, now seen corresponding path program 1 times [2025-03-16 14:03:43,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:03:43,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873931798] [2025-03-16 14:03:43,911 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:43,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:03:43,914 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 45 statements into 1 equivalence classes. [2025-03-16 14:03:43,920 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 45 of 45 statements. [2025-03-16 14:03:43,924 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:43,924 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:44,002 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-03-16 14:03:44,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:03:44,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873931798] [2025-03-16 14:03:44,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873931798] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:03:44,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 14:03:44,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-03-16 14:03:44,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800258875] [2025-03-16 14:03:44,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:03:44,003 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-16 14:03:44,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:03:44,003 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-16 14:03:44,003 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2025-03-16 14:03:44,003 INFO L87 Difference]: Start difference. First operand 266 states and 357 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-16 14:03:44,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:03:44,071 INFO L93 Difference]: Finished difference Result 285 states and 377 transitions. [2025-03-16 14:03:44,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-16 14:03:44,072 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 45 [2025-03-16 14:03:44,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:03:44,073 INFO L225 Difference]: With dead ends: 285 [2025-03-16 14:03:44,073 INFO L226 Difference]: Without dead ends: 245 [2025-03-16 14:03:44,073 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2025-03-16 14:03:44,073 INFO L435 NwaCegarLoop]: 104 mSDtfsCounter, 11 mSDsluCounter, 592 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 696 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 14:03:44,074 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 696 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 14:03:44,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2025-03-16 14:03:44,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 239. [2025-03-16 14:03:44,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 199 states have (on average 1.3015075376884422) internal successors, (259), 203 states have internal predecessors, (259), 25 states have call successors, (25), 12 states have call predecessors, (25), 14 states have return successors, (33), 23 states have call predecessors, (33), 24 states have call successors, (33) [2025-03-16 14:03:44,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 317 transitions. [2025-03-16 14:03:44,082 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 317 transitions. Word has length 45 [2025-03-16 14:03:44,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:03:44,082 INFO L471 AbstractCegarLoop]: Abstraction has 239 states and 317 transitions. [2025-03-16 14:03:44,083 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-16 14:03:44,083 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 317 transitions. [2025-03-16 14:03:44,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2025-03-16 14:03:44,083 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:03:44,083 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:03:44,083 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2025-03-16 14:03:44,084 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:03:44,084 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:03:44,084 INFO L85 PathProgramCache]: Analyzing trace with hash 2082057973, now seen corresponding path program 1 times [2025-03-16 14:03:44,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:03:44,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787096640] [2025-03-16 14:03:44,084 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:44,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:03:44,099 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 44 statements into 1 equivalence classes. [2025-03-16 14:03:44,100 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 44 of 44 statements. [2025-03-16 14:03:44,101 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:44,101 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:44,116 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2025-03-16 14:03:44,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:03:44,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787096640] [2025-03-16 14:03:44,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787096640] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:03:44,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 14:03:44,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-16 14:03:44,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074158789] [2025-03-16 14:03:44,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:03:44,117 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-16 14:03:44,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:03:44,117 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-16 14:03:44,117 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-16 14:03:44,117 INFO L87 Difference]: Start difference. First operand 239 states and 317 transitions. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-16 14:03:44,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:03:44,152 INFO L93 Difference]: Finished difference Result 482 states and 644 transitions. [2025-03-16 14:03:44,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-16 14:03:44,153 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2025-03-16 14:03:44,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:03:44,154 INFO L225 Difference]: With dead ends: 482 [2025-03-16 14:03:44,154 INFO L226 Difference]: Without dead ends: 245 [2025-03-16 14:03:44,155 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-16 14:03:44,155 INFO L435 NwaCegarLoop]: 92 mSDtfsCounter, 4 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 14:03:44,155 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 166 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 14:03:44,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2025-03-16 14:03:44,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 241. [2025-03-16 14:03:44,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 201 states have (on average 1.2985074626865671) internal successors, (261), 205 states have internal predecessors, (261), 25 states have call successors, (25), 12 states have call predecessors, (25), 14 states have return successors, (33), 23 states have call predecessors, (33), 24 states have call successors, (33) [2025-03-16 14:03:44,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 319 transitions. [2025-03-16 14:03:44,169 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 319 transitions. Word has length 44 [2025-03-16 14:03:44,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:03:44,170 INFO L471 AbstractCegarLoop]: Abstraction has 241 states and 319 transitions. [2025-03-16 14:03:44,170 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-16 14:03:44,170 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 319 transitions. [2025-03-16 14:03:44,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2025-03-16 14:03:44,171 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:03:44,171 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:03:44,171 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2025-03-16 14:03:44,171 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:03:44,171 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:03:44,171 INFO L85 PathProgramCache]: Analyzing trace with hash -1270504760, now seen corresponding path program 1 times [2025-03-16 14:03:44,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:03:44,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951294598] [2025-03-16 14:03:44,171 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:44,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:03:44,175 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 46 statements into 1 equivalence classes. [2025-03-16 14:03:44,179 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 46 of 46 statements. [2025-03-16 14:03:44,182 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:44,182 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:44,306 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2025-03-16 14:03:44,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:03:44,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951294598] [2025-03-16 14:03:44,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951294598] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 14:03:44,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772062444] [2025-03-16 14:03:44,306 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:44,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:03:44,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:03:44,308 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) [2025-03-16 14:03:44,310 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-16 14:03:44,336 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 46 statements into 1 equivalence classes. [2025-03-16 14:03:44,352 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 46 of 46 statements. [2025-03-16 14:03:44,352 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:44,353 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:44,353 INFO L256 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 35 conjuncts are in the unsatisfiable core [2025-03-16 14:03:44,355 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:03:44,492 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-16 14:03:44,492 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 14:03:44,796 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2025-03-16 14:03:44,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772062444] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 14:03:44,797 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 14:03:44,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17, 13] total 32 [2025-03-16 14:03:44,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285836889] [2025-03-16 14:03:44,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 14:03:44,797 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2025-03-16 14:03:44,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:03:44,798 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2025-03-16 14:03:44,798 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=904, Unknown=0, NotChecked=0, Total=992 [2025-03-16 14:03:44,798 INFO L87 Difference]: Start difference. First operand 241 states and 319 transitions. Second operand has 32 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 25 states have internal predecessors, (48), 6 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (10), 8 states have call predecessors, (10), 5 states have call successors, (10) [2025-03-16 14:03:46,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:03:46,188 INFO L93 Difference]: Finished difference Result 454 states and 634 transitions. [2025-03-16 14:03:46,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2025-03-16 14:03:46,188 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 25 states have internal predecessors, (48), 6 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (10), 8 states have call predecessors, (10), 5 states have call successors, (10) Word has length 46 [2025-03-16 14:03:46,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:03:46,190 INFO L225 Difference]: With dead ends: 454 [2025-03-16 14:03:46,190 INFO L226 Difference]: Without dead ends: 429 [2025-03-16 14:03:46,192 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 684 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=327, Invalid=3579, Unknown=0, NotChecked=0, Total=3906 [2025-03-16 14:03:46,193 INFO L435 NwaCegarLoop]: 179 mSDtfsCounter, 271 mSDsluCounter, 3347 mSDsCounter, 0 mSdLazyCounter, 1652 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 3526 SdHoareTripleChecker+Invalid, 1727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2025-03-16 14:03:46,193 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [306 Valid, 3526 Invalid, 1727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1652 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2025-03-16 14:03:46,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2025-03-16 14:03:46,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 284. [2025-03-16 14:03:46,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 235 states have (on average 1.2851063829787235) internal successors, (302), 243 states have internal predecessors, (302), 29 states have call successors, (29), 11 states have call predecessors, (29), 19 states have return successors, (49), 29 states have call predecessors, (49), 28 states have call successors, (49) [2025-03-16 14:03:46,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 380 transitions. [2025-03-16 14:03:46,215 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 380 transitions. Word has length 46 [2025-03-16 14:03:46,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:03:46,216 INFO L471 AbstractCegarLoop]: Abstraction has 284 states and 380 transitions. [2025-03-16 14:03:46,216 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 25 states have internal predecessors, (48), 6 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (10), 8 states have call predecessors, (10), 5 states have call successors, (10) [2025-03-16 14:03:46,217 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 380 transitions. [2025-03-16 14:03:46,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2025-03-16 14:03:46,217 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:03:46,217 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:03:46,225 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-03-16 14:03:46,418 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2025-03-16 14:03:46,418 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:03:46,418 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:03:46,419 INFO L85 PathProgramCache]: Analyzing trace with hash 155570092, now seen corresponding path program 2 times [2025-03-16 14:03:46,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:03:46,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786378496] [2025-03-16 14:03:46,419 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 14:03:46,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:03:46,422 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 46 statements into 2 equivalence classes. [2025-03-16 14:03:46,429 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 46 of 46 statements. [2025-03-16 14:03:46,429 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 14:03:46,429 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:46,567 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-16 14:03:46,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:03:46,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786378496] [2025-03-16 14:03:46,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786378496] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 14:03:46,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616685785] [2025-03-16 14:03:46,568 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 14:03:46,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:03:46,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:03:46,570 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) [2025-03-16 14:03:46,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-16 14:03:46,603 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 46 statements into 2 equivalence classes. [2025-03-16 14:03:46,617 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 46 of 46 statements. [2025-03-16 14:03:46,618 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 14:03:46,618 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:46,619 INFO L256 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 35 conjuncts are in the unsatisfiable core [2025-03-16 14:03:46,620 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:03:46,742 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-16 14:03:46,742 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 14:03:47,020 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2025-03-16 14:03:47,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616685785] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 14:03:47,021 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 14:03:47,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17, 13] total 30 [2025-03-16 14:03:47,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147912690] [2025-03-16 14:03:47,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 14:03:47,021 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2025-03-16 14:03:47,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:03:47,022 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2025-03-16 14:03:47,022 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2025-03-16 14:03:47,022 INFO L87 Difference]: Start difference. First operand 284 states and 380 transitions. Second operand has 30 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 24 states have internal predecessors, (54), 6 states have call successors, (10), 2 states have call predecessors, (10), 6 states have return successors, (11), 9 states have call predecessors, (11), 5 states have call successors, (11) [2025-03-16 14:03:48,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:03:48,131 INFO L93 Difference]: Finished difference Result 452 states and 639 transitions. [2025-03-16 14:03:48,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2025-03-16 14:03:48,131 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 24 states have internal predecessors, (54), 6 states have call successors, (10), 2 states have call predecessors, (10), 6 states have return successors, (11), 9 states have call predecessors, (11), 5 states have call successors, (11) Word has length 46 [2025-03-16 14:03:48,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:03:48,133 INFO L225 Difference]: With dead ends: 452 [2025-03-16 14:03:48,134 INFO L226 Difference]: Without dead ends: 439 [2025-03-16 14:03:48,134 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=265, Invalid=2705, Unknown=0, NotChecked=0, Total=2970 [2025-03-16 14:03:48,135 INFO L435 NwaCegarLoop]: 180 mSDtfsCounter, 224 mSDsluCounter, 3258 mSDsCounter, 0 mSdLazyCounter, 1514 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 3438 SdHoareTripleChecker+Invalid, 1566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2025-03-16 14:03:48,135 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [249 Valid, 3438 Invalid, 1566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1514 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2025-03-16 14:03:48,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2025-03-16 14:03:48,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 297. [2025-03-16 14:03:48,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 243 states have (on average 1.2757201646090535) internal successors, (310), 251 states have internal predecessors, (310), 33 states have call successors, (33), 12 states have call predecessors, (33), 20 states have return successors, (63), 33 states have call predecessors, (63), 32 states have call successors, (63) [2025-03-16 14:03:48,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 406 transitions. [2025-03-16 14:03:48,151 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 406 transitions. Word has length 46 [2025-03-16 14:03:48,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:03:48,152 INFO L471 AbstractCegarLoop]: Abstraction has 297 states and 406 transitions. [2025-03-16 14:03:48,152 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 24 states have internal predecessors, (54), 6 states have call successors, (10), 2 states have call predecessors, (10), 6 states have return successors, (11), 9 states have call predecessors, (11), 5 states have call successors, (11) [2025-03-16 14:03:48,152 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 406 transitions. [2025-03-16 14:03:48,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2025-03-16 14:03:48,153 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:03:48,153 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1] [2025-03-16 14:03:48,162 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-03-16 14:03:48,357 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:03:48,357 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:03:48,357 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:03:48,357 INFO L85 PathProgramCache]: Analyzing trace with hash -1629940300, now seen corresponding path program 1 times [2025-03-16 14:03:48,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:03:48,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749961462] [2025-03-16 14:03:48,357 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:48,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:03:48,361 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 45 statements into 1 equivalence classes. [2025-03-16 14:03:48,365 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 45 of 45 statements. [2025-03-16 14:03:48,365 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:48,366 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:48,397 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-16 14:03:48,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:03:48,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749961462] [2025-03-16 14:03:48,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749961462] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:03:48,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 14:03:48,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-16 14:03:48,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197707627] [2025-03-16 14:03:48,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:03:48,398 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-16 14:03:48,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:03:48,398 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-16 14:03:48,398 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-16 14:03:48,398 INFO L87 Difference]: Start difference. First operand 297 states and 406 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), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-16 14:03:48,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:03:48,448 INFO L93 Difference]: Finished difference Result 600 states and 827 transitions. [2025-03-16 14:03:48,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-16 14:03:48,448 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), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2025-03-16 14:03:48,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:03:48,450 INFO L225 Difference]: With dead ends: 600 [2025-03-16 14:03:48,450 INFO L226 Difference]: Without dead ends: 305 [2025-03-16 14:03:48,451 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2025-03-16 14:03:48,451 INFO L435 NwaCegarLoop]: 98 mSDtfsCounter, 8 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 14:03:48,452 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 255 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 14:03:48,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2025-03-16 14:03:48,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 295. [2025-03-16 14:03:48,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 241 states have (on average 1.2738589211618256) internal successors, (307), 249 states have internal predecessors, (307), 33 states have call successors, (33), 12 states have call predecessors, (33), 20 states have return successors, (63), 33 states have call predecessors, (63), 32 states have call successors, (63) [2025-03-16 14:03:48,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 403 transitions. [2025-03-16 14:03:48,464 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 403 transitions. Word has length 45 [2025-03-16 14:03:48,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:03:48,464 INFO L471 AbstractCegarLoop]: Abstraction has 295 states and 403 transitions. [2025-03-16 14:03:48,464 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), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-16 14:03:48,464 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 403 transitions. [2025-03-16 14:03:48,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2025-03-16 14:03:48,465 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:03:48,465 INFO L218 NwaCegarLoop]: trace histogram [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] [2025-03-16 14:03:48,465 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2025-03-16 14:03:48,465 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:03:48,466 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:03:48,466 INFO L85 PathProgramCache]: Analyzing trace with hash -1565726046, now seen corresponding path program 1 times [2025-03-16 14:03:48,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:03:48,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951359890] [2025-03-16 14:03:48,466 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:48,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:03:48,469 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 45 statements into 1 equivalence classes. [2025-03-16 14:03:48,473 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 45 of 45 statements. [2025-03-16 14:03:48,473 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:48,473 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:48,519 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2025-03-16 14:03:48,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:03:48,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951359890] [2025-03-16 14:03:48,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951359890] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:03:48,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 14:03:48,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-16 14:03:48,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273963493] [2025-03-16 14:03:48,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:03:48,520 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-16 14:03:48,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:03:48,520 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-16 14:03:48,520 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-16 14:03:48,520 INFO L87 Difference]: Start difference. First operand 295 states and 403 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-16 14:03:48,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:03:48,571 INFO L93 Difference]: Finished difference Result 594 states and 816 transitions. [2025-03-16 14:03:48,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-16 14:03:48,572 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2025-03-16 14:03:48,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:03:48,573 INFO L225 Difference]: With dead ends: 594 [2025-03-16 14:03:48,573 INFO L226 Difference]: Without dead ends: 301 [2025-03-16 14:03:48,574 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2025-03-16 14:03:48,575 INFO L435 NwaCegarLoop]: 99 mSDtfsCounter, 9 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 14:03:48,575 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 256 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 14:03:48,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2025-03-16 14:03:48,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 293. [2025-03-16 14:03:48,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 239 states have (on average 1.2677824267782427) internal successors, (303), 247 states have internal predecessors, (303), 33 states have call successors, (33), 12 states have call predecessors, (33), 20 states have return successors, (63), 33 states have call predecessors, (63), 32 states have call successors, (63) [2025-03-16 14:03:48,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 399 transitions. [2025-03-16 14:03:48,587 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 399 transitions. Word has length 45 [2025-03-16 14:03:48,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:03:48,587 INFO L471 AbstractCegarLoop]: Abstraction has 293 states and 399 transitions. [2025-03-16 14:03:48,587 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-16 14:03:48,587 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 399 transitions. [2025-03-16 14:03:48,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2025-03-16 14:03:48,588 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:03:48,588 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:03:48,588 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2025-03-16 14:03:48,588 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:03:48,588 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:03:48,588 INFO L85 PathProgramCache]: Analyzing trace with hash 507483419, now seen corresponding path program 1 times [2025-03-16 14:03:48,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:03:48,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628112022] [2025-03-16 14:03:48,589 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:48,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:03:48,592 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 45 statements into 1 equivalence classes. [2025-03-16 14:03:48,605 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 45 of 45 statements. [2025-03-16 14:03:48,607 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:48,608 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:48,673 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2025-03-16 14:03:48,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:03:48,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628112022] [2025-03-16 14:03:48,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628112022] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 14:03:48,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091152609] [2025-03-16 14:03:48,674 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:48,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:03:48,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:03:48,675 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) [2025-03-16 14:03:48,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-16 14:03:48,706 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 45 statements into 1 equivalence classes. [2025-03-16 14:03:48,718 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 45 of 45 statements. [2025-03-16 14:03:48,719 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:48,719 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:48,720 INFO L256 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-03-16 14:03:48,721 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:03:48,749 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2025-03-16 14:03:48,749 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 14:03:48,885 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2025-03-16 14:03:48,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091152609] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 14:03:48,885 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 14:03:48,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 15 [2025-03-16 14:03:48,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560842314] [2025-03-16 14:03:48,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 14:03:48,885 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-03-16 14:03:48,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:03:48,886 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-03-16 14:03:48,886 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2025-03-16 14:03:48,886 INFO L87 Difference]: Start difference. First operand 293 states and 399 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 11 states have internal predecessors, (39), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2025-03-16 14:03:49,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:03:49,047 INFO L93 Difference]: Finished difference Result 431 states and 582 transitions. [2025-03-16 14:03:49,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-16 14:03:49,048 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 11 states have internal predecessors, (39), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 45 [2025-03-16 14:03:49,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:03:49,049 INFO L225 Difference]: With dead ends: 431 [2025-03-16 14:03:49,049 INFO L226 Difference]: Without dead ends: 357 [2025-03-16 14:03:49,050 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2025-03-16 14:03:49,050 INFO L435 NwaCegarLoop]: 88 mSDtfsCounter, 136 mSDsluCounter, 950 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 1038 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 14:03:49,050 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 1038 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 14:03:49,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2025-03-16 14:03:49,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 337. [2025-03-16 14:03:49,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 277 states have (on average 1.2707581227436824) internal successors, (352), 287 states have internal predecessors, (352), 35 states have call successors, (35), 14 states have call predecessors, (35), 24 states have return successors, (64), 35 states have call predecessors, (64), 34 states have call successors, (64) [2025-03-16 14:03:49,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 451 transitions. [2025-03-16 14:03:49,064 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 451 transitions. Word has length 45 [2025-03-16 14:03:49,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:03:49,064 INFO L471 AbstractCegarLoop]: Abstraction has 337 states and 451 transitions. [2025-03-16 14:03:49,064 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 11 states have internal predecessors, (39), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2025-03-16 14:03:49,064 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 451 transitions. [2025-03-16 14:03:49,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2025-03-16 14:03:49,065 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:03:49,065 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:03:49,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-03-16 14:03:49,269 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:03:49,270 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:03:49,270 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:03:49,270 INFO L85 PathProgramCache]: Analyzing trace with hash 310969914, now seen corresponding path program 1 times [2025-03-16 14:03:49,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:03:49,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694019620] [2025-03-16 14:03:49,270 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:49,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:03:49,273 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 45 statements into 1 equivalence classes. [2025-03-16 14:03:49,285 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 45 of 45 statements. [2025-03-16 14:03:49,285 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:49,285 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:49,383 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2025-03-16 14:03:49,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:03:49,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694019620] [2025-03-16 14:03:49,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694019620] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 14:03:49,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553777397] [2025-03-16 14:03:49,383 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:49,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:03:49,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:03:49,385 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) [2025-03-16 14:03:49,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-16 14:03:49,410 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 45 statements into 1 equivalence classes. [2025-03-16 14:03:49,431 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 45 of 45 statements. [2025-03-16 14:03:49,431 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:49,431 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:49,432 INFO L256 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-03-16 14:03:49,433 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:03:49,459 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2025-03-16 14:03:49,459 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 14:03:49,562 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2025-03-16 14:03:49,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553777397] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 14:03:49,563 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 14:03:49,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2025-03-16 14:03:49,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94323144] [2025-03-16 14:03:49,563 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 14:03:49,563 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-16 14:03:49,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:03:49,564 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-16 14:03:49,564 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2025-03-16 14:03:49,564 INFO L87 Difference]: Start difference. First operand 337 states and 451 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 12 states have internal predecessors, (40), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2025-03-16 14:03:49,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:03:49,742 INFO L93 Difference]: Finished difference Result 563 states and 770 transitions. [2025-03-16 14:03:49,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-16 14:03:49,743 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 12 states have internal predecessors, (40), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 45 [2025-03-16 14:03:49,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:03:49,745 INFO L225 Difference]: With dead ends: 563 [2025-03-16 14:03:49,745 INFO L226 Difference]: Without dead ends: 386 [2025-03-16 14:03:49,745 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2025-03-16 14:03:49,746 INFO L435 NwaCegarLoop]: 95 mSDtfsCounter, 137 mSDsluCounter, 1104 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 1199 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 14:03:49,746 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 1199 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 14:03:49,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2025-03-16 14:03:49,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 337. [2025-03-16 14:03:49,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 277 states have (on average 1.263537906137184) internal successors, (350), 287 states have internal predecessors, (350), 35 states have call successors, (35), 14 states have call predecessors, (35), 24 states have return successors, (64), 35 states have call predecessors, (64), 34 states have call successors, (64) [2025-03-16 14:03:49,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 449 transitions. [2025-03-16 14:03:49,760 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 449 transitions. Word has length 45 [2025-03-16 14:03:49,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:03:49,761 INFO L471 AbstractCegarLoop]: Abstraction has 337 states and 449 transitions. [2025-03-16 14:03:49,761 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 12 states have internal predecessors, (40), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2025-03-16 14:03:49,761 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 449 transitions. [2025-03-16 14:03:49,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2025-03-16 14:03:49,762 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:03:49,762 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 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] [2025-03-16 14:03:49,768 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-03-16 14:03:49,962 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,SelfDestructingSolverStorable17 [2025-03-16 14:03:49,962 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:03:49,963 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:03:49,963 INFO L85 PathProgramCache]: Analyzing trace with hash 42897776, now seen corresponding path program 1 times [2025-03-16 14:03:49,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:03:49,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088635904] [2025-03-16 14:03:49,963 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:49,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:03:49,966 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 48 statements into 1 equivalence classes. [2025-03-16 14:03:49,969 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 48 of 48 statements. [2025-03-16 14:03:49,969 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:49,969 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:50,043 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-16 14:03:50,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:03:50,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088635904] [2025-03-16 14:03:50,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088635904] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 14:03:50,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069371472] [2025-03-16 14:03:50,044 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:50,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:03:50,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:03:50,045 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) [2025-03-16 14:03:50,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-16 14:03:50,070 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 48 statements into 1 equivalence classes. [2025-03-16 14:03:50,081 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 48 of 48 statements. [2025-03-16 14:03:50,081 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:50,082 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:50,082 INFO L256 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 26 conjuncts are in the unsatisfiable core [2025-03-16 14:03:50,083 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:03:50,169 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-16 14:03:50,170 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 14:03:50,372 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2025-03-16 14:03:50,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069371472] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 14:03:50,372 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 14:03:50,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 10] total 23 [2025-03-16 14:03:50,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314019988] [2025-03-16 14:03:50,373 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 14:03:50,373 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-03-16 14:03:50,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:03:50,373 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-03-16 14:03:50,373 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2025-03-16 14:03:50,373 INFO L87 Difference]: Start difference. First operand 337 states and 449 transitions. Second operand has 23 states, 21 states have (on average 2.761904761904762) internal successors, (58), 20 states have internal predecessors, (58), 5 states have call successors, (10), 2 states have call predecessors, (10), 6 states have return successors, (11), 7 states have call predecessors, (11), 4 states have call successors, (11) [2025-03-16 14:03:50,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:03:50,786 INFO L93 Difference]: Finished difference Result 435 states and 609 transitions. [2025-03-16 14:03:50,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-03-16 14:03:50,787 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 2.761904761904762) internal successors, (58), 20 states have internal predecessors, (58), 5 states have call successors, (10), 2 states have call predecessors, (10), 6 states have return successors, (11), 7 states have call predecessors, (11), 4 states have call successors, (11) Word has length 48 [2025-03-16 14:03:50,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:03:50,789 INFO L225 Difference]: With dead ends: 435 [2025-03-16 14:03:50,789 INFO L226 Difference]: Without dead ends: 397 [2025-03-16 14:03:50,789 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=126, Invalid=866, Unknown=0, NotChecked=0, Total=992 [2025-03-16 14:03:50,790 INFO L435 NwaCegarLoop]: 89 mSDtfsCounter, 226 mSDsluCounter, 1148 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 1237 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-16 14:03:50,790 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [233 Valid, 1237 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 456 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-16 14:03:50,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2025-03-16 14:03:50,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 333. [2025-03-16 14:03:50,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 272 states have (on average 1.2610294117647058) internal successors, (343), 284 states have internal predecessors, (343), 36 states have call successors, (36), 12 states have call predecessors, (36), 24 states have return successors, (77), 36 states have call predecessors, (77), 35 states have call successors, (77) [2025-03-16 14:03:50,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 456 transitions. [2025-03-16 14:03:50,806 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 456 transitions. Word has length 48 [2025-03-16 14:03:50,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:03:50,806 INFO L471 AbstractCegarLoop]: Abstraction has 333 states and 456 transitions. [2025-03-16 14:03:50,807 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 2.761904761904762) internal successors, (58), 20 states have internal predecessors, (58), 5 states have call successors, (10), 2 states have call predecessors, (10), 6 states have return successors, (11), 7 states have call predecessors, (11), 4 states have call successors, (11) [2025-03-16 14:03:50,807 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 456 transitions. [2025-03-16 14:03:50,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2025-03-16 14:03:50,807 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:03:50,807 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:03:50,814 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-03-16 14:03:51,012 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:03:51,012 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:03:51,013 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:03:51,013 INFO L85 PathProgramCache]: Analyzing trace with hash 1248541231, now seen corresponding path program 1 times [2025-03-16 14:03:51,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:03:51,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810218806] [2025-03-16 14:03:51,013 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:51,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:03:51,017 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 47 statements into 1 equivalence classes. [2025-03-16 14:03:51,028 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 47 of 47 statements. [2025-03-16 14:03:51,031 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:51,032 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:51,160 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2025-03-16 14:03:51,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:03:51,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810218806] [2025-03-16 14:03:51,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810218806] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:03:51,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 14:03:51,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-03-16 14:03:51,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998265812] [2025-03-16 14:03:51,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:03:51,161 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-16 14:03:51,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:03:51,162 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-16 14:03:51,162 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2025-03-16 14:03:51,162 INFO L87 Difference]: Start difference. First operand 333 states and 456 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-16 14:03:51,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:03:51,233 INFO L93 Difference]: Finished difference Result 339 states and 461 transitions. [2025-03-16 14:03:51,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-16 14:03:51,234 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 47 [2025-03-16 14:03:51,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:03:51,235 INFO L225 Difference]: With dead ends: 339 [2025-03-16 14:03:51,236 INFO L226 Difference]: Without dead ends: 337 [2025-03-16 14:03:51,236 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2025-03-16 14:03:51,236 INFO L435 NwaCegarLoop]: 82 mSDtfsCounter, 12 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 14:03:51,236 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 459 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 14:03:51,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2025-03-16 14:03:51,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 337. [2025-03-16 14:03:51,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 275 states have (on average 1.2581818181818183) internal successors, (346), 287 states have internal predecessors, (346), 36 states have call successors, (36), 13 states have call predecessors, (36), 25 states have return successors, (77), 36 states have call predecessors, (77), 35 states have call successors, (77) [2025-03-16 14:03:51,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 459 transitions. [2025-03-16 14:03:51,254 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 459 transitions. Word has length 47 [2025-03-16 14:03:51,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:03:51,255 INFO L471 AbstractCegarLoop]: Abstraction has 337 states and 459 transitions. [2025-03-16 14:03:51,255 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-16 14:03:51,255 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 459 transitions. [2025-03-16 14:03:51,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2025-03-16 14:03:51,256 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:03:51,256 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:03:51,256 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2025-03-16 14:03:51,256 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:03:51,256 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:03:51,256 INFO L85 PathProgramCache]: Analyzing trace with hash -204555653, now seen corresponding path program 1 times [2025-03-16 14:03:51,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:03:51,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654561175] [2025-03-16 14:03:51,257 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:51,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:03:51,260 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 53 statements into 1 equivalence classes. [2025-03-16 14:03:51,266 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 53 of 53 statements. [2025-03-16 14:03:51,266 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:51,266 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:51,401 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2025-03-16 14:03:51,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:03:51,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654561175] [2025-03-16 14:03:51,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654561175] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 14:03:51,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420712604] [2025-03-16 14:03:51,402 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:51,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:03:51,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:03:51,404 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) [2025-03-16 14:03:51,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-16 14:03:51,433 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 53 statements into 1 equivalence classes. [2025-03-16 14:03:51,446 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 53 of 53 statements. [2025-03-16 14:03:51,447 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:51,447 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:51,451 INFO L256 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-03-16 14:03:51,453 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:03:51,476 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2025-03-16 14:03:51,476 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 14:03:51,711 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2025-03-16 14:03:51,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420712604] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 14:03:51,711 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 14:03:51,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2025-03-16 14:03:51,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699186171] [2025-03-16 14:03:51,711 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 14:03:51,712 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-03-16 14:03:51,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:03:51,712 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-03-16 14:03:51,712 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=540, Unknown=0, NotChecked=0, Total=600 [2025-03-16 14:03:51,713 INFO L87 Difference]: Start difference. First operand 337 states and 459 transitions. Second operand has 25 states, 23 states have (on average 2.260869565217391) internal successors, (52), 21 states have internal predecessors, (52), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2025-03-16 14:03:52,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:03:52,243 INFO L93 Difference]: Finished difference Result 403 states and 565 transitions. [2025-03-16 14:03:52,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-03-16 14:03:52,244 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.260869565217391) internal successors, (52), 21 states have internal predecessors, (52), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 53 [2025-03-16 14:03:52,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:03:52,246 INFO L225 Difference]: With dead ends: 403 [2025-03-16 14:03:52,246 INFO L226 Difference]: Without dead ends: 371 [2025-03-16 14:03:52,247 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=137, Invalid=1269, Unknown=0, NotChecked=0, Total=1406 [2025-03-16 14:03:52,248 INFO L435 NwaCegarLoop]: 115 mSDtfsCounter, 143 mSDsluCounter, 1573 mSDsCounter, 0 mSdLazyCounter, 775 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 1688 SdHoareTripleChecker+Invalid, 792 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 775 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-16 14:03:52,248 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 1688 Invalid, 792 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 775 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-16 14:03:52,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2025-03-16 14:03:52,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 323. [2025-03-16 14:03:52,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 265 states have (on average 1.2679245283018867) internal successors, (336), 276 states have internal predecessors, (336), 34 states have call successors, (34), 11 states have call predecessors, (34), 23 states have return successors, (73), 35 states have call predecessors, (73), 33 states have call successors, (73) [2025-03-16 14:03:52,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 443 transitions. [2025-03-16 14:03:52,263 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 443 transitions. Word has length 53 [2025-03-16 14:03:52,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:03:52,263 INFO L471 AbstractCegarLoop]: Abstraction has 323 states and 443 transitions. [2025-03-16 14:03:52,263 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.260869565217391) internal successors, (52), 21 states have internal predecessors, (52), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2025-03-16 14:03:52,264 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 443 transitions. [2025-03-16 14:03:52,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2025-03-16 14:03:52,264 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:03:52,265 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:03:52,271 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-03-16 14:03:52,469 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,SelfDestructingSolverStorable20 [2025-03-16 14:03:52,469 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:03:52,469 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:03:52,469 INFO L85 PathProgramCache]: Analyzing trace with hash -920077367, now seen corresponding path program 2 times [2025-03-16 14:03:52,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:03:52,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195047141] [2025-03-16 14:03:52,469 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 14:03:52,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:03:52,473 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 53 statements into 2 equivalence classes. [2025-03-16 14:03:52,488 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 53 of 53 statements. [2025-03-16 14:03:52,488 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 14:03:52,488 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:53,067 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-03-16 14:03:53,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:03:53,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195047141] [2025-03-16 14:03:53,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195047141] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 14:03:53,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953673579] [2025-03-16 14:03:53,068 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 14:03:53,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:03:53,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:03:53,070 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) [2025-03-16 14:03:53,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-16 14:03:53,101 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 53 statements into 2 equivalence classes. [2025-03-16 14:03:53,123 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 53 of 53 statements. [2025-03-16 14:03:53,123 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 14:03:53,123 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:53,126 INFO L256 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 28 conjuncts are in the unsatisfiable core [2025-03-16 14:03:53,127 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:03:53,332 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2025-03-16 14:03:53,332 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 14:03:54,206 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2025-03-16 14:03:54,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953673579] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 14:03:54,206 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 14:03:54,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 13, 14] total 42 [2025-03-16 14:03:54,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101998263] [2025-03-16 14:03:54,206 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 14:03:54,207 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2025-03-16 14:03:54,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:03:54,207 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2025-03-16 14:03:54,207 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1611, Unknown=0, NotChecked=0, Total=1722 [2025-03-16 14:03:54,208 INFO L87 Difference]: Start difference. First operand 323 states and 443 transitions. Second operand has 42 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 35 states have internal predecessors, (69), 7 states have call successors, (10), 2 states have call predecessors, (10), 8 states have return successors, (11), 8 states have call predecessors, (11), 6 states have call successors, (11) [2025-03-16 14:03:56,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:03:56,045 INFO L93 Difference]: Finished difference Result 458 states and 689 transitions. [2025-03-16 14:03:56,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2025-03-16 14:03:56,045 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 35 states have internal predecessors, (69), 7 states have call successors, (10), 2 states have call predecessors, (10), 8 states have return successors, (11), 8 states have call predecessors, (11), 6 states have call successors, (11) Word has length 53 [2025-03-16 14:03:56,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:03:56,047 INFO L225 Difference]: With dead ends: 458 [2025-03-16 14:03:56,047 INFO L226 Difference]: Without dead ends: 411 [2025-03-16 14:03:56,048 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 88 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 837 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=298, Invalid=4124, Unknown=0, NotChecked=0, Total=4422 [2025-03-16 14:03:56,049 INFO L435 NwaCegarLoop]: 115 mSDtfsCounter, 145 mSDsluCounter, 3453 mSDsCounter, 0 mSdLazyCounter, 2309 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 3568 SdHoareTripleChecker+Invalid, 2335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 2309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2025-03-16 14:03:56,049 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 3568 Invalid, 2335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 2309 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2025-03-16 14:03:56,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2025-03-16 14:03:56,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 315. [2025-03-16 14:03:56,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 258 states have (on average 1.2751937984496124) internal successors, (329), 271 states have internal predecessors, (329), 33 states have call successors, (33), 9 states have call predecessors, (33), 23 states have return successors, (72), 34 states have call predecessors, (72), 32 states have call successors, (72) [2025-03-16 14:03:56,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 434 transitions. [2025-03-16 14:03:56,066 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 434 transitions. Word has length 53 [2025-03-16 14:03:56,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:03:56,066 INFO L471 AbstractCegarLoop]: Abstraction has 315 states and 434 transitions. [2025-03-16 14:03:56,066 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 35 states have internal predecessors, (69), 7 states have call successors, (10), 2 states have call predecessors, (10), 8 states have return successors, (11), 8 states have call predecessors, (11), 6 states have call successors, (11) [2025-03-16 14:03:56,066 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 434 transitions. [2025-03-16 14:03:56,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2025-03-16 14:03:56,067 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:03:56,067 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:03:56,074 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2025-03-16 14:03:56,268 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,SelfDestructingSolverStorable21 [2025-03-16 14:03:56,268 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:03:56,268 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:03:56,268 INFO L85 PathProgramCache]: Analyzing trace with hash 1542776664, now seen corresponding path program 1 times [2025-03-16 14:03:56,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:03:56,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199982432] [2025-03-16 14:03:56,268 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:56,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:03:56,271 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 54 statements into 1 equivalence classes. [2025-03-16 14:03:56,275 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 54 of 54 statements. [2025-03-16 14:03:56,275 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:56,275 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:56,309 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-16 14:03:56,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:03:56,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199982432] [2025-03-16 14:03:56,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199982432] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:03:56,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 14:03:56,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-16 14:03:56,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893181924] [2025-03-16 14:03:56,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:03:56,310 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-16 14:03:56,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:03:56,311 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-16 14:03:56,311 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-16 14:03:56,311 INFO L87 Difference]: Start difference. First operand 315 states and 434 transitions. Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 4 states have internal predecessors, (34), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-16 14:03:56,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:03:56,368 INFO L93 Difference]: Finished difference Result 356 states and 497 transitions. [2025-03-16 14:03:56,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-16 14:03:56,368 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 4 states have internal predecessors, (34), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 54 [2025-03-16 14:03:56,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:03:56,370 INFO L225 Difference]: With dead ends: 356 [2025-03-16 14:03:56,370 INFO L226 Difference]: Without dead ends: 354 [2025-03-16 14:03:56,370 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-03-16 14:03:56,370 INFO L435 NwaCegarLoop]: 86 mSDtfsCounter, 11 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 14:03:56,370 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 325 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 14:03:56,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2025-03-16 14:03:56,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 334. [2025-03-16 14:03:56,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 271 states have (on average 1.2988929889298892) internal successors, (352), 289 states have internal predecessors, (352), 38 states have call successors, (38), 10 states have call predecessors, (38), 24 states have return successors, (77), 34 states have call predecessors, (77), 37 states have call successors, (77) [2025-03-16 14:03:56,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 467 transitions. [2025-03-16 14:03:56,386 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 467 transitions. Word has length 54 [2025-03-16 14:03:56,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:03:56,386 INFO L471 AbstractCegarLoop]: Abstraction has 334 states and 467 transitions. [2025-03-16 14:03:56,386 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 4 states have internal predecessors, (34), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-16 14:03:56,386 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 467 transitions. [2025-03-16 14:03:56,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2025-03-16 14:03:56,387 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:03:56,387 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:03:56,387 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2025-03-16 14:03:56,387 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:03:56,387 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:03:56,387 INFO L85 PathProgramCache]: Analyzing trace with hash 724406584, now seen corresponding path program 1 times [2025-03-16 14:03:56,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:03:56,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185010891] [2025-03-16 14:03:56,388 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:56,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:03:56,391 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 55 statements into 1 equivalence classes. [2025-03-16 14:03:56,401 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 55 of 55 statements. [2025-03-16 14:03:56,402 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:56,402 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:56,492 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-16 14:03:56,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:03:56,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185010891] [2025-03-16 14:03:56,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185010891] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:03:56,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 14:03:56,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-03-16 14:03:56,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444380841] [2025-03-16 14:03:56,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:03:56,493 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-16 14:03:56,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:03:56,493 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-16 14:03:56,493 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2025-03-16 14:03:56,493 INFO L87 Difference]: Start difference. First operand 334 states and 467 transitions. Second operand has 9 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-16 14:03:56,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:03:56,590 INFO L93 Difference]: Finished difference Result 545 states and 757 transitions. [2025-03-16 14:03:56,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-16 14:03:56,591 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 55 [2025-03-16 14:03:56,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:03:56,593 INFO L225 Difference]: With dead ends: 545 [2025-03-16 14:03:56,593 INFO L226 Difference]: Without dead ends: 345 [2025-03-16 14:03:56,594 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2025-03-16 14:03:56,594 INFO L435 NwaCegarLoop]: 87 mSDtfsCounter, 58 mSDsluCounter, 590 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 677 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 14:03:56,595 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 677 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 14:03:56,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2025-03-16 14:03:56,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 334. [2025-03-16 14:03:56,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 271 states have (on average 1.2915129151291513) internal successors, (350), 289 states have internal predecessors, (350), 38 states have call successors, (38), 10 states have call predecessors, (38), 24 states have return successors, (77), 34 states have call predecessors, (77), 37 states have call successors, (77) [2025-03-16 14:03:56,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 465 transitions. [2025-03-16 14:03:56,611 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 465 transitions. Word has length 55 [2025-03-16 14:03:56,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:03:56,612 INFO L471 AbstractCegarLoop]: Abstraction has 334 states and 465 transitions. [2025-03-16 14:03:56,612 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-16 14:03:56,612 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 465 transitions. [2025-03-16 14:03:56,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2025-03-16 14:03:56,613 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:03:56,613 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:03:56,613 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2025-03-16 14:03:56,613 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:03:56,614 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:03:56,614 INFO L85 PathProgramCache]: Analyzing trace with hash 394075976, now seen corresponding path program 1 times [2025-03-16 14:03:56,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:03:56,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896421418] [2025-03-16 14:03:56,614 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:56,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:03:56,618 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 57 statements into 1 equivalence classes. [2025-03-16 14:03:56,632 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 57 of 57 statements. [2025-03-16 14:03:56,633 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:56,633 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:56,666 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-16 14:03:56,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:03:56,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896421418] [2025-03-16 14:03:56,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896421418] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:03:56,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 14:03:56,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-16 14:03:56,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585365478] [2025-03-16 14:03:56,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:03:56,667 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-16 14:03:56,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:03:56,667 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-16 14:03:56,667 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-16 14:03:56,667 INFO L87 Difference]: Start difference. First operand 334 states and 465 transitions. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-16 14:03:56,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:03:56,706 INFO L93 Difference]: Finished difference Result 494 states and 692 transitions. [2025-03-16 14:03:56,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-16 14:03:56,707 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 57 [2025-03-16 14:03:56,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:03:56,708 INFO L225 Difference]: With dead ends: 494 [2025-03-16 14:03:56,708 INFO L226 Difference]: Without dead ends: 339 [2025-03-16 14:03:56,709 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-16 14:03:56,709 INFO L435 NwaCegarLoop]: 89 mSDtfsCounter, 0 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 14:03:56,709 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 161 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 14:03:56,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2025-03-16 14:03:56,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 339. [2025-03-16 14:03:56,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 276 states have (on average 1.286231884057971) internal successors, (355), 294 states have internal predecessors, (355), 38 states have call successors, (38), 10 states have call predecessors, (38), 24 states have return successors, (77), 34 states have call predecessors, (77), 37 states have call successors, (77) [2025-03-16 14:03:56,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 470 transitions. [2025-03-16 14:03:56,728 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 470 transitions. Word has length 57 [2025-03-16 14:03:56,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:03:56,728 INFO L471 AbstractCegarLoop]: Abstraction has 339 states and 470 transitions. [2025-03-16 14:03:56,729 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-16 14:03:56,729 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 470 transitions. [2025-03-16 14:03:56,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2025-03-16 14:03:56,730 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:03:56,730 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:03:56,730 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2025-03-16 14:03:56,730 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:03:56,730 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:03:56,731 INFO L85 PathProgramCache]: Analyzing trace with hash -353801470, now seen corresponding path program 1 times [2025-03-16 14:03:56,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:03:56,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298904736] [2025-03-16 14:03:56,731 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:56,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:03:56,734 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 58 statements into 1 equivalence classes. [2025-03-16 14:03:56,750 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 58 of 58 statements. [2025-03-16 14:03:56,750 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:56,750 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-03-16 14:03:56,750 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-03-16 14:03:56,752 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 58 statements into 1 equivalence classes. [2025-03-16 14:03:56,762 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 58 of 58 statements. [2025-03-16 14:03:56,762 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:56,762 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-03-16 14:03:56,777 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-03-16 14:03:56,777 INFO L340 BasicCegarLoop]: Counterexample is feasible [2025-03-16 14:03:56,778 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2025-03-16 14:03:56,780 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2025-03-16 14:03:56,782 INFO L422 BasicCegarLoop]: Path program histogram: [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:03:56,807 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2025-03-16 14:03:56,810 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.03 02:03:56 BoogieIcfgContainer [2025-03-16 14:03:56,810 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2025-03-16 14:03:56,811 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2025-03-16 14:03:56,811 INFO L270 PluginConnector]: Initializing Witness Printer... [2025-03-16 14:03:56,811 INFO L274 PluginConnector]: Witness Printer initialized [2025-03-16 14:03:56,812 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.03 02:03:38" (3/4) ... [2025-03-16 14:03:56,813 INFO L149 WitnessPrinter]: No result that supports witness generation found [2025-03-16 14:03:56,814 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2025-03-16 14:03:56,814 INFO L158 Benchmark]: Toolchain (without parser) took 18554.06ms. Allocated memory was 142.6MB in the beginning and 268.4MB in the end (delta: 125.8MB). Free memory was 114.0MB in the beginning and 112.1MB in the end (delta: 1.9MB). Peak memory consumption was 130.0MB. Max. memory is 16.1GB. [2025-03-16 14:03:56,815 INFO L158 Benchmark]: CDTParser took 0.88ms. Allocated memory is still 201.3MB. Free memory is still 122.1MB. There was no memory consumed. Max. memory is 16.1GB. [2025-03-16 14:03:56,815 INFO L158 Benchmark]: CACSL2BoogieTranslator took 189.83ms. Allocated memory is still 142.6MB. Free memory was 113.5MB in the beginning and 100.3MB in the end (delta: 13.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-03-16 14:03:56,815 INFO L158 Benchmark]: Boogie Procedure Inliner took 29.68ms. Allocated memory is still 142.6MB. Free memory was 100.3MB in the beginning and 99.1MB in the end (delta: 1.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-03-16 14:03:56,815 INFO L158 Benchmark]: Boogie Preprocessor took 38.61ms. Allocated memory is still 142.6MB. Free memory was 99.1MB in the beginning and 97.6MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2025-03-16 14:03:56,815 INFO L158 Benchmark]: IcfgBuilder took 399.59ms. Allocated memory is still 142.6MB. Free memory was 97.6MB in the beginning and 76.7MB in the end (delta: 20.9MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2025-03-16 14:03:56,816 INFO L158 Benchmark]: TraceAbstraction took 17887.61ms. Allocated memory was 142.6MB in the beginning and 268.4MB in the end (delta: 125.8MB). Free memory was 76.2MB in the beginning and 112.2MB in the end (delta: -36.0MB). Peak memory consumption was 88.0MB. Max. memory is 16.1GB. [2025-03-16 14:03:56,816 INFO L158 Benchmark]: Witness Printer took 2.61ms. Allocated memory is still 268.4MB. Free memory was 112.2MB in the beginning and 112.1MB in the end (delta: 54.1kB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-03-16 14:03:56,818 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.88ms. Allocated memory is still 201.3MB. Free memory is still 122.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 189.83ms. Allocated memory is still 142.6MB. Free memory was 113.5MB in the beginning and 100.3MB in the end (delta: 13.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 29.68ms. Allocated memory is still 142.6MB. Free memory was 100.3MB in the beginning and 99.1MB in the end (delta: 1.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Preprocessor took 38.61ms. Allocated memory is still 142.6MB. Free memory was 99.1MB in the beginning and 97.6MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * IcfgBuilder took 399.59ms. Allocated memory is still 142.6MB. Free memory was 97.6MB in the beginning and 76.7MB in the end (delta: 20.9MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 17887.61ms. Allocated memory was 142.6MB in the beginning and 268.4MB in the end (delta: 125.8MB). Free memory was 76.2MB in the beginning and 112.2MB in the end (delta: -36.0MB). Peak memory consumption was 88.0MB. Max. memory is 16.1GB. * Witness Printer took 2.61ms. Allocated memory is still 268.4MB. Free memory was 112.2MB in the beginning and 112.1MB in the end (delta: 54.1kB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 18]: Unable to prove that a call to reach_error is unreachable Unable to prove that a call to reach_error is unreachable Reason: overapproximation of bitwiseOr at line 111, overapproximation of bitwiseOr at line 114, overapproximation of bitwiseAnd at line 127. Possible FailurePath: [L227] unsigned int a ; [L228] unsigned int ma = __VERIFIER_nondet_uint(); [L229] signed char ea = __VERIFIER_nondet_char(); [L230] unsigned int b ; [L231] unsigned int mb = __VERIFIER_nondet_uint(); [L232] signed char eb = __VERIFIER_nondet_char(); [L233] unsigned int r_add1 ; [L234] unsigned int r_add2 ; [L235] unsigned int zero ; [L236] int tmp ; [L237] int tmp___0 ; [L238] int __retres14 ; VAL [ea=127, eb=127] [L242] CALL, EXPR base2flt(0, 0) VAL [\old(e)=0, \old(m)=0] [L26] unsigned int res ; [L27] unsigned int __retres4 ; VAL [\old(e)=0, \old(m)=0, e=0, m=0] [L30] COND TRUE ! m [L31] __retres4 = 0U VAL [\old(e)=0, \old(m)=0, __retres4=0, e=0] [L81] return (__retres4); VAL [\old(e)=0, \old(m)=0, \result=0, e=0] [L242] RET, EXPR base2flt(0, 0) VAL [ea=127, eb=127] [L242] zero = base2flt(0, 0) [L243] CALL, EXPR base2flt(ma, ea) VAL [\old(e)=127, \old(m)=4328521728] [L26] unsigned int res ; [L27] unsigned int __retres4 ; VAL [\old(e)=127, \old(m)=4328521728, e=127, m=4328521728] [L30] COND FALSE !(! m) VAL [\old(e)=127, \old(m)=4328521728, e=127, m=4328521728] [L36] COND FALSE !(m < 1U << 24U) VAL [\old(e)=127, \old(m)=4328521728, e=127, m=4328521728] [L60] COND TRUE m >= 1U << 25U VAL [\old(e)=127, \old(m)=4328521728, e=127, m=4328521728] [L65] COND TRUE e >= 127 [L66] __retres4 = 4294967295U VAL [\old(e)=127, \old(m)=4328521728, __retres4=4294967295, m=4328521728] [L81] return (__retres4); VAL [\old(e)=127, \old(m)=4328521728, \result=4294967295, m=4328521728] [L243] RET, EXPR base2flt(ma, ea) VAL [ea=127, eb=127, ma=4328521728] [L243] a = base2flt(ma, ea) [L244] CALL, EXPR base2flt(mb, eb) VAL [\old(e)=127, \old(m)=33554432] [L26] unsigned int res ; [L27] unsigned int __retres4 ; VAL [\old(e)=127, \old(m)=33554432, e=127, m=33554432] [L30] COND FALSE !(! m) VAL [\old(e)=127, \old(m)=33554432, e=127, m=33554432] [L36] COND FALSE !(m < 1U << 24U) VAL [\old(e)=127, \old(m)=33554432, e=127, m=33554432] [L60] COND TRUE m >= 1U << 25U VAL [\old(e)=127, \old(m)=33554432, e=127, m=33554432] [L65] COND TRUE e >= 127 [L66] __retres4 = 4294967295U VAL [\old(e)=127, \old(m)=33554432, __retres4=4294967295, m=33554432] [L81] return (__retres4); VAL [\old(e)=127, \old(m)=33554432, \result=4294967295, m=33554432] [L244] RET, EXPR base2flt(mb, eb) VAL [a=4294967295, ea=127, eb=127, ma=4328521728, mb=33554432] [L244] b = base2flt(mb, eb) [L245] CALL addflt(a, b) VAL [\old(a)=4294967295, \old(b)=4294967295] [L85] unsigned int res ; [L86] unsigned int ma ; [L87] unsigned int mb ; [L88] unsigned int delta ; [L89] int ea ; [L90] int eb ; [L91] unsigned int tmp ; [L92] unsigned int __retres10 ; VAL [\old(a)=4294967295, \old(b)=4294967295, a=4294967295, b=4294967295] [L95] COND FALSE !(a < b) VAL [\old(a)=4294967295, \old(b)=4294967295, a=4294967295, b=4294967295] [L102] COND FALSE !(! b) [L109] ma = a & ((1U << 24U) - 1U) [L110] ea = (int )(a >> 24U) - 128 VAL [\old(a)=4294967295, \old(b)=4294967295, a=4294967295, b=4294967295, ea=127, ma=16777215] [L111] EXPR ma | (1U << 24U) VAL [\old(a)=4294967295, \old(b)=4294967295, a=4294967295, b=4294967295, ea=127] [L111] ma = ma | (1U << 24U) [L112] mb = b & ((1U << 24U) - 1U) [L113] eb = (int )(b >> 24U) - 128 VAL [\old(a)=4294967295, \old(b)=4294967295, a=4294967295, ea=127, eb=127, ma=16777217, mb=16777215] [L114] EXPR mb | (1U << 24U) VAL [\old(a)=4294967295, \old(b)=4294967295, a=4294967295, ea=127, eb=127, ma=16777217] [L114] mb = mb | (1U << 24U) [L115] CALL __VERIFIER_assert(ea >= eb) VAL [\old(cond)=1] [L17] COND FALSE !(!(cond)) VAL [\old(cond)=1] [L115] RET __VERIFIER_assert(ea >= eb) VAL [\old(a)=4294967295, \old(b)=4294967295, a=4294967295, ea=127, eb=127, ma=16777217, mb=-4278190080] [L116] delta = ea - eb VAL [\old(a)=4294967295, \old(b)=4294967295, a=4294967295, delta=0, ea=127, ma=16777217, mb=-4278190080] [L117] COND FALSE !(!(delta < sizeof(mb) * 8)) VAL [\old(a)=4294967295, \old(b)=4294967295, a=4294967295, delta=0, ea=127, ma=16777217, mb=-4278190080] [L118] EXPR mb >> delta VAL [\old(a)=4294967295, \old(b)=4294967295, a=4294967295, ea=127, ma=16777217] [L118] mb = mb >> delta [L120] COND FALSE !(! mb) [L126] ma = ma + mb VAL [\old(a)=4294967295, \old(b)=4294967295, a=4294967295, ea=127, ma=-4261412863] [L127] ma & (1U << 25U) VAL [\old(a)=4294967295, \old(b)=4294967295, a=4294967295, ea=127, ma=-4261412863] [L127] COND FALSE !(ma & (1U << 25U)) [L140] CALL __VERIFIER_assert(ma < 1U << 25U) VAL [\old(cond)=0] [L17] COND TRUE !(cond) VAL [\old(cond)=0] [L18] reach_error() VAL [\old(cond)=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 74 locations, 116 edges, 1 error locations. Started 1 CEGAR loops. OverallTime: 17.8s, OverallIterations: 26, TraceHistogramMax: 3, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 7.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1976 SdHoareTripleChecker+Valid, 4.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1838 mSDsluCounter, 27336 SdHoareTripleChecker+Invalid, 3.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 24703 mSDsCounter, 252 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 9674 IncrementalHoareTripleChecker+Invalid, 9926 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 252 mSolverCounterUnsat, 2633 mSDtfsCounter, 9674 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1282 GetRequests, 851 SyntacticMatches, 5 SemanticMatches, 426 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2461 ImplicationChecksByTransitivity, 5.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=339occurred in iteration=25, InterpolantAutomatonStates: 340, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 25 MinimizatonAttempts, 805 StatesRemovedByMinimization, 22 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 6.4s InterpolantComputationTime, 1685 NumberOfCodeBlocks, 1668 NumberOfCodeBlocksAsserted, 41 NumberOfCheckSat, 1997 ConstructedInterpolants, 1 QuantifiedInterpolants, 4456 SizeOfPredicates, 16 NumberOfNonLiveVariables, 1628 ConjunctsInSsa, 253 ConjunctsInUnsatCore, 45 InterpolantComputations, 16 PerfectInterpolantSequences, 719/843 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available, ConComCheckerStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2025-03-16 14:03:56,832 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/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_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/bitvector/soft_float_4-2a.c.cil.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.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 2abfa4882ab8ec6bd7a33a5fbeaa8a88ba40a897019218fc162e52833c89454b --- Real Ultimate output --- This is Ultimate 0.3.0-?-8fc3dc6-m [2025-03-16 14:03:58,571 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-16 14:03:58,646 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2025-03-16 14:03:58,653 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-16 14:03:58,655 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-16 14:03:58,667 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-16 14:03:58,668 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-16 14:03:58,668 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-16 14:03:58,668 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-16 14:03:58,668 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-16 14:03:58,668 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-16 14:03:58,669 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-16 14:03:58,669 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-16 14:03:58,669 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-16 14:03:58,669 INFO L153 SettingsManager]: * Use SBE=true [2025-03-16 14:03:58,669 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-16 14:03:58,669 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-16 14:03:58,669 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-16 14:03:58,669 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-16 14:03:58,669 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-16 14:03:58,670 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-16 14:03:58,670 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-16 14:03:58,670 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-16 14:03:58,670 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-03-16 14:03:58,670 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2025-03-16 14:03:58,670 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2025-03-16 14:03:58,670 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-16 14:03:58,670 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-16 14:03:58,670 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-16 14:03:58,670 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-16 14:03:58,670 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-16 14:03:58,670 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-16 14:03:58,671 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-16 14:03:58,671 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-16 14:03:58,671 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-16 14:03:58,671 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-16 14:03:58,671 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-16 14:03:58,671 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-16 14:03:58,671 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-16 14:03:58,671 INFO L153 SettingsManager]: * Trace refinement strategy=FOX [2025-03-16 14:03:58,671 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2025-03-16 14:03:58,671 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-16 14:03:58,671 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-16 14:03:58,671 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-16 14:03:58,672 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-16 14:03:58,672 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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 -> 2abfa4882ab8ec6bd7a33a5fbeaa8a88ba40a897019218fc162e52833c89454b [2025-03-16 14:03:58,891 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-16 14:03:58,898 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-16 14:03:58,899 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-16 14:03:58,900 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-16 14:03:58,901 INFO L274 PluginConnector]: CDTParser initialized [2025-03-16 14:03:58,902 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/bitvector/soft_float_4-2a.c.cil.c [2025-03-16 14:04:00,039 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e484c26f9/2df48f0048b14b9ea00bf26a68afb889/FLAGedf2eb2ef [2025-03-16 14:04:00,228 INFO L384 CDTParser]: Found 1 translation units. [2025-03-16 14:04:00,232 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/soft_float_4-2a.c.cil.c [2025-03-16 14:04:00,238 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e484c26f9/2df48f0048b14b9ea00bf26a68afb889/FLAGedf2eb2ef [2025-03-16 14:04:00,251 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e484c26f9/2df48f0048b14b9ea00bf26a68afb889 [2025-03-16 14:04:00,253 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-16 14:04:00,254 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-16 14:04:00,256 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-16 14:04:00,256 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-16 14:04:00,259 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-16 14:04:00,259 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.03 02:04:00" (1/1) ... [2025-03-16 14:04:00,260 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15da1dfa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 02:04:00, skipping insertion in model container [2025-03-16 14:04:00,261 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.03 02:04:00" (1/1) ... [2025-03-16 14:04:00,280 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-16 14:04:00,382 WARN L250 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_4-2a.c.cil.c[755,768] [2025-03-16 14:04:00,423 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-16 14:04:00,430 INFO L200 MainTranslator]: Completed pre-run [2025-03-16 14:04:00,437 WARN L250 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_4-2a.c.cil.c[755,768] [2025-03-16 14:04:00,455 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-16 14:04:00,466 INFO L204 MainTranslator]: Completed translation [2025-03-16 14:04:00,467 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 02:04:00 WrapperNode [2025-03-16 14:04:00,467 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-16 14:04:00,468 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-16 14:04:00,468 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-16 14:04:00,468 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-16 14:04:00,472 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 02:04:00" (1/1) ... [2025-03-16 14:04:00,477 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 02:04:00" (1/1) ... [2025-03-16 14:04:00,490 INFO L138 Inliner]: procedures = 17, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 54 [2025-03-16 14:04:00,490 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-16 14:04:00,490 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-16 14:04:00,490 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-16 14:04:00,490 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-16 14:04:00,496 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 02:04:00" (1/1) ... [2025-03-16 14:04:00,497 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 02:04:00" (1/1) ... [2025-03-16 14:04:00,499 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 02:04:00" (1/1) ... [2025-03-16 14:04:00,511 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]. [2025-03-16 14:04:00,512 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 02:04:00" (1/1) ... [2025-03-16 14:04:00,512 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 02:04:00" (1/1) ... [2025-03-16 14:04:00,522 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 02:04:00" (1/1) ... [2025-03-16 14:04:00,523 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 02:04:00" (1/1) ... [2025-03-16 14:04:00,524 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 02:04:00" (1/1) ... [2025-03-16 14:04:00,524 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 02:04:00" (1/1) ... [2025-03-16 14:04:00,527 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-16 14:04:00,527 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-16 14:04:00,527 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-16 14:04:00,528 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-16 14:04:00,528 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 02:04:00" (1/1) ... [2025-03-16 14:04:00,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-16 14:04:00,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:04:00,552 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) [2025-03-16 14:04:00,556 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 [2025-03-16 14:04:00,575 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-16 14:04:00,575 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2025-03-16 14:04:00,575 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2025-03-16 14:04:00,575 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2025-03-16 14:04:00,575 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-16 14:04:00,576 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-16 14:04:00,576 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2025-03-16 14:04:00,576 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2025-03-16 14:04:00,576 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2025-03-16 14:04:00,576 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2025-03-16 14:04:00,636 INFO L256 CfgBuilder]: Building ICFG [2025-03-16 14:04:00,638 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-16 14:04:00,801 INFO L? ?]: Removed 33 outVars from TransFormulas that were not future-live. [2025-03-16 14:04:00,801 INFO L307 CfgBuilder]: Performing block encoding [2025-03-16 14:04:00,807 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-16 14:04:00,807 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-16 14:04:00,807 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.03 02:04:00 BoogieIcfgContainer [2025-03-16 14:04:00,807 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-16 14:04:00,809 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-16 14:04:00,809 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-16 14:04:00,812 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-16 14:04:00,813 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.03 02:04:00" (1/3) ... [2025-03-16 14:04:00,813 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@703ad692 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.03 02:04:00, skipping insertion in model container [2025-03-16 14:04:00,813 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 02:04:00" (2/3) ... [2025-03-16 14:04:00,813 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@703ad692 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.03 02:04:00, skipping insertion in model container [2025-03-16 14:04:00,813 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.03 02:04:00" (3/3) ... [2025-03-16 14:04:00,814 INFO L128 eAbstractionObserver]: Analyzing ICFG soft_float_4-2a.c.cil.c [2025-03-16 14:04:00,823 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-16 14:04:00,824 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG soft_float_4-2a.c.cil.c that has 4 procedures, 50 locations, 1 initial locations, 2 loop locations, and 1 error locations. [2025-03-16 14:04:00,856 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-16 14:04:00,865 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;@20c1ca6c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-16 14:04:00,866 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-16 14:04:00,868 INFO L276 IsEmpty]: Start isEmpty. Operand has 50 states, 37 states have (on average 1.4864864864864864) internal successors, (55), 38 states have internal predecessors, (55), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2025-03-16 14:04:00,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2025-03-16 14:04:00,873 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:04:00,874 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:04:00,874 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:04:00,886 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:04:00,887 INFO L85 PathProgramCache]: Analyzing trace with hash 1204775606, now seen corresponding path program 1 times [2025-03-16 14:04:00,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-16 14:04:00,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [693084152] [2025-03-16 14:04:00,893 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:04:00,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:04:00,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:04:00,895 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) [2025-03-16 14:04:00,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-16 14:04:00,945 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 30 statements into 1 equivalence classes. [2025-03-16 14:04:00,962 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 30 of 30 statements. [2025-03-16 14:04:00,962 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:04:00,962 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:04:00,964 INFO L256 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-16 14:04:00,967 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:04:01,086 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-03-16 14:04:01,086 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 14:04:01,128 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-03-16 14:04:01,129 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-16 14:04:01,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693084152] [2025-03-16 14:04:01,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693084152] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 14:04:01,130 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-16 14:04:01,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2025-03-16 14:04:01,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043363823] [2025-03-16 14:04:01,131 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-16 14:04:01,133 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-16 14:04:01,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-16 14:04:01,144 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-16 14:04:01,145 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2025-03-16 14:04:01,146 INFO L87 Difference]: Start difference. First operand has 50 states, 37 states have (on average 1.4864864864864864) internal successors, (55), 38 states have internal predecessors, (55), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2025-03-16 14:04:01,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:04:01,278 INFO L93 Difference]: Finished difference Result 120 states and 184 transitions. [2025-03-16 14:04:01,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-16 14:04:01,281 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2025-03-16 14:04:01,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:04:01,288 INFO L225 Difference]: With dead ends: 120 [2025-03-16 14:04:01,289 INFO L226 Difference]: Without dead ends: 68 [2025-03-16 14:04:01,292 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2025-03-16 14:04:01,295 INFO L435 NwaCegarLoop]: 60 mSDtfsCounter, 14 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 470 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 14:04:01,296 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 470 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 14:04:01,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2025-03-16 14:04:01,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 60. [2025-03-16 14:04:01,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 44 states have (on average 1.3409090909090908) internal successors, (59), 46 states have internal predecessors, (59), 10 states have call successors, (10), 4 states have call predecessors, (10), 5 states have return successors, (13), 9 states have call predecessors, (13), 9 states have call successors, (13) [2025-03-16 14:04:01,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 82 transitions. [2025-03-16 14:04:01,330 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 82 transitions. Word has length 30 [2025-03-16 14:04:01,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:04:01,332 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 82 transitions. [2025-03-16 14:04:01,332 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2025-03-16 14:04:01,332 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 82 transitions. [2025-03-16 14:04:01,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2025-03-16 14:04:01,334 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:04:01,335 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:04:01,342 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-16 14:04:01,539 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:04:01,539 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:04:01,540 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:04:01,540 INFO L85 PathProgramCache]: Analyzing trace with hash -1474493368, now seen corresponding path program 1 times [2025-03-16 14:04:01,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-16 14:04:01,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [486067601] [2025-03-16 14:04:01,540 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:04:01,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:04:01,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:04:01,542 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) [2025-03-16 14:04:01,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-16 14:04:01,577 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 33 statements into 1 equivalence classes. [2025-03-16 14:04:01,587 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 33 of 33 statements. [2025-03-16 14:04:01,587 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:04:01,587 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:04:01,588 INFO L256 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-03-16 14:04:01,591 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:04:01,741 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-16 14:04:01,742 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 14:04:01,853 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-03-16 14:04:01,853 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-16 14:04:01,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486067601] [2025-03-16 14:04:01,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486067601] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-16 14:04:01,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-16 14:04:01,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12] total 16 [2025-03-16 14:04:01,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536096261] [2025-03-16 14:04:01,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:04:01,854 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-16 14:04:01,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-16 14:04:01,855 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-16 14:04:01,855 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2025-03-16 14:04:01,855 INFO L87 Difference]: Start difference. First operand 60 states and 82 transitions. Second operand has 8 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-16 14:04:01,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:04:01,960 INFO L93 Difference]: Finished difference Result 124 states and 166 transitions. [2025-03-16 14:04:01,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-16 14:04:01,960 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 33 [2025-03-16 14:04:01,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:04:01,961 INFO L225 Difference]: With dead ends: 124 [2025-03-16 14:04:01,961 INFO L226 Difference]: Without dead ends: 92 [2025-03-16 14:04:01,962 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2025-03-16 14:04:01,962 INFO L435 NwaCegarLoop]: 71 mSDtfsCounter, 24 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 472 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 14:04:01,962 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 472 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 14:04:01,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2025-03-16 14:04:01,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 85. [2025-03-16 14:04:01,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 63 states have (on average 1.3015873015873016) internal successors, (82), 65 states have internal predecessors, (82), 14 states have call successors, (14), 6 states have call predecessors, (14), 7 states have return successors, (17), 13 states have call predecessors, (17), 13 states have call successors, (17) [2025-03-16 14:04:01,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 113 transitions. [2025-03-16 14:04:01,972 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 113 transitions. Word has length 33 [2025-03-16 14:04:01,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:04:01,972 INFO L471 AbstractCegarLoop]: Abstraction has 85 states and 113 transitions. [2025-03-16 14:04:01,972 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-16 14:04:01,973 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 113 transitions. [2025-03-16 14:04:01,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2025-03-16 14:04:01,973 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:04:01,973 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:04:01,982 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-03-16 14:04:02,174 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 [2025-03-16 14:04:02,174 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:04:02,174 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:04:02,175 INFO L85 PathProgramCache]: Analyzing trace with hash -1445864217, now seen corresponding path program 1 times [2025-03-16 14:04:02,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-16 14:04:02,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1584171085] [2025-03-16 14:04:02,175 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:04:02,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:04:02,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:04:02,177 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) [2025-03-16 14:04:02,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-16 14:04:02,206 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 33 statements into 1 equivalence classes. [2025-03-16 14:04:02,215 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 33 of 33 statements. [2025-03-16 14:04:02,215 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:04:02,215 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:04:02,217 INFO L256 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-03-16 14:04:02,218 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:04:02,257 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-03-16 14:04:02,258 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-16 14:04:02,258 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-16 14:04:02,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584171085] [2025-03-16 14:04:02,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584171085] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:04:02,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 14:04:02,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2025-03-16 14:04:02,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770516739] [2025-03-16 14:04:02,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:04:02,258 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-16 14:04:02,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-16 14:04:02,259 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-16 14:04:02,259 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2025-03-16 14:04:02,259 INFO L87 Difference]: Start difference. First operand 85 states and 113 transitions. Second operand has 8 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-16 14:04:02,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:04:02,316 INFO L93 Difference]: Finished difference Result 123 states and 162 transitions. [2025-03-16 14:04:02,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-16 14:04:02,319 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 33 [2025-03-16 14:04:02,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:04:02,319 INFO L225 Difference]: With dead ends: 123 [2025-03-16 14:04:02,319 INFO L226 Difference]: Without dead ends: 83 [2025-03-16 14:04:02,320 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2025-03-16 14:04:02,320 INFO L435 NwaCegarLoop]: 58 mSDtfsCounter, 12 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 14:04:02,320 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 398 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 14:04:02,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2025-03-16 14:04:02,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 68. [2025-03-16 14:04:02,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 50 states have (on average 1.3) internal successors, (65), 52 states have internal predecessors, (65), 11 states have call successors, (11), 5 states have call predecessors, (11), 6 states have return successors, (14), 10 states have call predecessors, (14), 10 states have call successors, (14) [2025-03-16 14:04:02,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 90 transitions. [2025-03-16 14:04:02,342 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 90 transitions. Word has length 33 [2025-03-16 14:04:02,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:04:02,342 INFO L471 AbstractCegarLoop]: Abstraction has 68 states and 90 transitions. [2025-03-16 14:04:02,342 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-16 14:04:02,342 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 90 transitions. [2025-03-16 14:04:02,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2025-03-16 14:04:02,343 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:04:02,343 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:04:02,350 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-03-16 14:04:02,543 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:04:02,544 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:04:02,544 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:04:02,544 INFO L85 PathProgramCache]: Analyzing trace with hash 854087132, now seen corresponding path program 2 times [2025-03-16 14:04:02,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-16 14:04:02,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1846060734] [2025-03-16 14:04:02,545 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 14:04:02,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:04:02,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:04:02,547 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) [2025-03-16 14:04:02,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-16 14:04:02,579 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 36 statements into 2 equivalence classes. [2025-03-16 14:04:02,586 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 19 of 36 statements. [2025-03-16 14:04:02,586 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-16 14:04:02,586 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:04:02,586 INFO L256 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-16 14:04:02,588 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:04:02,700 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-16 14:04:02,701 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-16 14:04:02,701 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-16 14:04:02,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846060734] [2025-03-16 14:04:02,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846060734] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:04:02,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 14:04:02,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2025-03-16 14:04:02,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316448562] [2025-03-16 14:04:02,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:04:02,702 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-16 14:04:02,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-16 14:04:02,702 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-16 14:04:02,702 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2025-03-16 14:04:02,702 INFO L87 Difference]: Start difference. First operand 68 states and 90 transitions. Second operand has 12 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-16 14:04:02,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:04:02,926 INFO L93 Difference]: Finished difference Result 143 states and 189 transitions. [2025-03-16 14:04:02,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-16 14:04:02,927 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 36 [2025-03-16 14:04:02,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:04:02,928 INFO L225 Difference]: With dead ends: 143 [2025-03-16 14:04:02,929 INFO L226 Difference]: Without dead ends: 111 [2025-03-16 14:04:02,929 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2025-03-16 14:04:02,930 INFO L435 NwaCegarLoop]: 95 mSDtfsCounter, 40 mSDsluCounter, 869 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 964 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 14:04:02,931 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 964 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 14:04:02,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2025-03-16 14:04:02,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 101. [2025-03-16 14:04:02,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 75 states have (on average 1.2666666666666666) internal successors, (95), 78 states have internal predecessors, (95), 15 states have call successors, (15), 8 states have call predecessors, (15), 10 states have return successors, (22), 14 states have call predecessors, (22), 14 states have call successors, (22) [2025-03-16 14:04:02,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 132 transitions. [2025-03-16 14:04:02,944 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 132 transitions. Word has length 36 [2025-03-16 14:04:02,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:04:02,944 INFO L471 AbstractCegarLoop]: Abstraction has 101 states and 132 transitions. [2025-03-16 14:04:02,945 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-16 14:04:02,945 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 132 transitions. [2025-03-16 14:04:02,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2025-03-16 14:04:02,945 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:04:02,946 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:04:02,951 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-03-16 14:04:03,148 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:04:03,148 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:04:03,148 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:04:03,148 INFO L85 PathProgramCache]: Analyzing trace with hash -425602705, now seen corresponding path program 1 times [2025-03-16 14:04:03,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-16 14:04:03,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1916345813] [2025-03-16 14:04:03,149 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:04:03,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:04:03,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:04:03,150 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) [2025-03-16 14:04:03,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-16 14:04:03,175 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 36 statements into 1 equivalence classes. [2025-03-16 14:04:03,184 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 36 of 36 statements. [2025-03-16 14:04:03,184 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:04:03,184 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:04:03,185 INFO L256 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-03-16 14:04:03,186 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:04:03,233 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2025-03-16 14:04:03,234 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 14:04:03,271 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2025-03-16 14:04:03,273 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-16 14:04:03,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916345813] [2025-03-16 14:04:03,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916345813] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 14:04:03,273 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-16 14:04:03,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2025-03-16 14:04:03,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222378976] [2025-03-16 14:04:03,273 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-16 14:04:03,273 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-16 14:04:03,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-16 14:04:03,274 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-16 14:04:03,274 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2025-03-16 14:04:03,274 INFO L87 Difference]: Start difference. First operand 101 states and 132 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 6 states have internal predecessors, (22), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2025-03-16 14:04:03,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:04:03,349 INFO L93 Difference]: Finished difference Result 203 states and 267 transitions. [2025-03-16 14:04:03,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-16 14:04:03,349 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 6 states have internal predecessors, (22), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2025-03-16 14:04:03,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:04:03,352 INFO L225 Difference]: With dead ends: 203 [2025-03-16 14:04:03,352 INFO L226 Difference]: Without dead ends: 158 [2025-03-16 14:04:03,352 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2025-03-16 14:04:03,354 INFO L435 NwaCegarLoop]: 100 mSDtfsCounter, 36 mSDsluCounter, 537 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 637 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 14:04:03,354 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 637 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 14:04:03,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2025-03-16 14:04:03,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 137. [2025-03-16 14:04:03,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 102 states have (on average 1.2647058823529411) internal successors, (129), 105 states have internal predecessors, (129), 22 states have call successors, (22), 10 states have call predecessors, (22), 12 states have return successors, (31), 21 states have call predecessors, (31), 21 states have call successors, (31) [2025-03-16 14:04:03,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 182 transitions. [2025-03-16 14:04:03,380 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 182 transitions. Word has length 36 [2025-03-16 14:04:03,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:04:03,381 INFO L471 AbstractCegarLoop]: Abstraction has 137 states and 182 transitions. [2025-03-16 14:04:03,382 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 6 states have internal predecessors, (22), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2025-03-16 14:04:03,382 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 182 transitions. [2025-03-16 14:04:03,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2025-03-16 14:04:03,383 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:04:03,383 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:04:03,388 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-03-16 14:04:03,583 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:04:03,583 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:04:03,584 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:04:03,584 INFO L85 PathProgramCache]: Analyzing trace with hash -396973554, now seen corresponding path program 1 times [2025-03-16 14:04:03,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-16 14:04:03,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1349313362] [2025-03-16 14:04:03,584 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:04:03,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:04:03,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:04:03,586 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) [2025-03-16 14:04:03,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-16 14:04:03,618 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 36 statements into 1 equivalence classes. [2025-03-16 14:04:03,628 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 36 of 36 statements. [2025-03-16 14:04:03,628 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:04:03,628 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:04:03,629 INFO L256 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-03-16 14:04:03,630 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:04:03,733 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2025-03-16 14:04:03,733 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 14:04:03,890 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-16 14:04:03,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349313362] [2025-03-16 14:04:03,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349313362] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 14:04:03,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [60458130] [2025-03-16 14:04:03,890 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:04:03,890 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2025-03-16 14:04:03,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2025-03-16 14:04:03,892 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2025-03-16 14:04:03,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2025-03-16 14:04:03,926 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 36 statements into 1 equivalence classes. [2025-03-16 14:04:03,954 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 36 of 36 statements. [2025-03-16 14:04:03,954 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:04:03,954 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:04:03,957 INFO L256 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-03-16 14:04:03,958 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:04:04,005 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2025-03-16 14:04:04,006 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 14:04:04,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [60458130] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 14:04:04,037 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-16 14:04:04,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2025-03-16 14:04:04,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085338202] [2025-03-16 14:04:04,037 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-16 14:04:04,038 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-03-16 14:04:04,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-16 14:04:04,038 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-03-16 14:04:04,038 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2025-03-16 14:04:04,038 INFO L87 Difference]: Start difference. First operand 137 states and 182 transitions. Second operand has 11 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2025-03-16 14:04:04,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:04:04,195 INFO L93 Difference]: Finished difference Result 168 states and 214 transitions. [2025-03-16 14:04:04,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-16 14:04:04,196 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2025-03-16 14:04:04,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:04:04,197 INFO L225 Difference]: With dead ends: 168 [2025-03-16 14:04:04,197 INFO L226 Difference]: Without dead ends: 166 [2025-03-16 14:04:04,198 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2025-03-16 14:04:04,198 INFO L435 NwaCegarLoop]: 99 mSDtfsCounter, 38 mSDsluCounter, 812 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 911 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 14:04:04,198 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 911 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 14:04:04,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2025-03-16 14:04:04,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 145. [2025-03-16 14:04:04,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 108 states have (on average 1.25) internal successors, (135), 111 states have internal predecessors, (135), 22 states have call successors, (22), 12 states have call predecessors, (22), 14 states have return successors, (31), 21 states have call predecessors, (31), 21 states have call successors, (31) [2025-03-16 14:04:04,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 188 transitions. [2025-03-16 14:04:04,218 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 188 transitions. Word has length 36 [2025-03-16 14:04:04,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:04:04,218 INFO L471 AbstractCegarLoop]: Abstraction has 145 states and 188 transitions. [2025-03-16 14:04:04,218 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2025-03-16 14:04:04,218 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 188 transitions. [2025-03-16 14:04:04,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2025-03-16 14:04:04,219 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:04:04,219 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:04:04,227 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-03-16 14:04:04,426 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (8)] Ended with exit code 0 [2025-03-16 14:04:04,624 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2025-03-16 14:04:04,624 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:04:04,624 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:04:04,624 INFO L85 PathProgramCache]: Analyzing trace with hash 1750085954, now seen corresponding path program 1 times [2025-03-16 14:04:04,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-16 14:04:04,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1303411880] [2025-03-16 14:04:04,625 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:04:04,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:04:04,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:04:04,626 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) [2025-03-16 14:04:04,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-16 14:04:04,652 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 36 statements into 1 equivalence classes. [2025-03-16 14:04:04,663 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 36 of 36 statements. [2025-03-16 14:04:04,663 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:04:04,663 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:04:04,664 INFO L256 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-16 14:04:04,665 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:04:04,735 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-16 14:04:04,735 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-16 14:04:04,735 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-16 14:04:04,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303411880] [2025-03-16 14:04:04,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303411880] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:04:04,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 14:04:04,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-16 14:04:04,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945358785] [2025-03-16 14:04:04,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:04:04,737 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-16 14:04:04,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-16 14:04:04,738 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-16 14:04:04,738 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-03-16 14:04:04,738 INFO L87 Difference]: Start difference. First operand 145 states and 188 transitions. Second operand has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-16 14:04:04,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:04:04,804 INFO L93 Difference]: Finished difference Result 161 states and 205 transitions. [2025-03-16 14:04:04,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-16 14:04:04,805 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 36 [2025-03-16 14:04:04,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:04:04,806 INFO L225 Difference]: With dead ends: 161 [2025-03-16 14:04:04,806 INFO L226 Difference]: Without dead ends: 159 [2025-03-16 14:04:04,806 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2025-03-16 14:04:04,806 INFO L435 NwaCegarLoop]: 59 mSDtfsCounter, 3 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 14:04:04,807 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 284 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 14:04:04,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2025-03-16 14:04:04,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 151. [2025-03-16 14:04:04,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 112 states have (on average 1.25) internal successors, (140), 116 states have internal predecessors, (140), 23 states have call successors, (23), 13 states have call predecessors, (23), 15 states have return successors, (32), 21 states have call predecessors, (32), 22 states have call successors, (32) [2025-03-16 14:04:04,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 195 transitions. [2025-03-16 14:04:04,824 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 195 transitions. Word has length 36 [2025-03-16 14:04:04,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:04:04,824 INFO L471 AbstractCegarLoop]: Abstraction has 151 states and 195 transitions. [2025-03-16 14:04:04,825 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-16 14:04:04,825 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 195 transitions. [2025-03-16 14:04:04,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2025-03-16 14:04:04,826 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:04:04,826 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:04:04,832 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2025-03-16 14:04:05,026 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 [2025-03-16 14:04:05,027 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:04:05,027 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:04:05,028 INFO L85 PathProgramCache]: Analyzing trace with hash 1778715105, now seen corresponding path program 1 times [2025-03-16 14:04:05,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-16 14:04:05,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1868242763] [2025-03-16 14:04:05,028 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:04:05,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:04:05,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:04:05,030 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) [2025-03-16 14:04:05,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-16 14:04:05,060 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 36 statements into 1 equivalence classes. [2025-03-16 14:04:05,070 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 36 of 36 statements. [2025-03-16 14:04:05,070 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:04:05,070 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:04:05,070 INFO L256 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-16 14:04:05,071 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:04:05,122 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-16 14:04:05,123 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-16 14:04:05,123 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-16 14:04:05,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868242763] [2025-03-16 14:04:05,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868242763] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:04:05,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 14:04:05,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-16 14:04:05,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379079547] [2025-03-16 14:04:05,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:04:05,123 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-16 14:04:05,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-16 14:04:05,124 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-16 14:04:05,124 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-03-16 14:04:05,124 INFO L87 Difference]: Start difference. First operand 151 states and 195 transitions. Second operand has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-16 14:04:05,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:04:05,181 INFO L93 Difference]: Finished difference Result 157 states and 200 transitions. [2025-03-16 14:04:05,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-16 14:04:05,181 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 36 [2025-03-16 14:04:05,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:04:05,182 INFO L225 Difference]: With dead ends: 157 [2025-03-16 14:04:05,182 INFO L226 Difference]: Without dead ends: 155 [2025-03-16 14:04:05,182 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2025-03-16 14:04:05,183 INFO L435 NwaCegarLoop]: 58 mSDtfsCounter, 3 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 14:04:05,183 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 279 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 14:04:05,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2025-03-16 14:04:05,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 149. [2025-03-16 14:04:05,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 111 states have (on average 1.2432432432432432) internal successors, (138), 114 states have internal predecessors, (138), 22 states have call successors, (22), 13 states have call predecessors, (22), 15 states have return successors, (31), 21 states have call predecessors, (31), 21 states have call successors, (31) [2025-03-16 14:04:05,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 191 transitions. [2025-03-16 14:04:05,199 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 191 transitions. Word has length 36 [2025-03-16 14:04:05,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:04:05,199 INFO L471 AbstractCegarLoop]: Abstraction has 149 states and 191 transitions. [2025-03-16 14:04:05,199 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-16 14:04:05,199 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 191 transitions. [2025-03-16 14:04:05,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2025-03-16 14:04:05,203 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:04:05,203 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:04:05,208 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-03-16 14:04:05,403 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:04:05,403 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:04:05,404 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:04:05,404 INFO L85 PathProgramCache]: Analyzing trace with hash -877140721, now seen corresponding path program 1 times [2025-03-16 14:04:05,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-16 14:04:05,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [320489148] [2025-03-16 14:04:05,404 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:04:05,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:04:05,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:04:05,406 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) [2025-03-16 14:04:05,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-16 14:04:05,433 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 43 statements into 1 equivalence classes. [2025-03-16 14:04:05,442 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 43 of 43 statements. [2025-03-16 14:04:05,442 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:04:05,442 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:04:05,443 INFO L256 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-03-16 14:04:05,444 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:04:05,493 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-16 14:04:05,493 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 14:04:05,553 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-16 14:04:05,553 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-16 14:04:05,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320489148] [2025-03-16 14:04:05,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320489148] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 14:04:05,553 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-16 14:04:05,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2025-03-16 14:04:05,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428627914] [2025-03-16 14:04:05,554 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-16 14:04:05,554 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-16 14:04:05,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-16 14:04:05,555 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-16 14:04:05,555 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2025-03-16 14:04:05,555 INFO L87 Difference]: Start difference. First operand 149 states and 191 transitions. Second operand has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2025-03-16 14:04:05,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:04:05,633 INFO L93 Difference]: Finished difference Result 180 states and 230 transitions. [2025-03-16 14:04:05,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-16 14:04:05,634 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 43 [2025-03-16 14:04:05,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:04:05,636 INFO L225 Difference]: With dead ends: 180 [2025-03-16 14:04:05,636 INFO L226 Difference]: Without dead ends: 169 [2025-03-16 14:04:05,637 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2025-03-16 14:04:05,638 INFO L435 NwaCegarLoop]: 62 mSDtfsCounter, 18 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 442 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 14:04:05,639 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 442 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 14:04:05,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2025-03-16 14:04:05,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 157. [2025-03-16 14:04:05,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 116 states have (on average 1.2413793103448276) internal successors, (144), 120 states have internal predecessors, (144), 24 states have call successors, (24), 13 states have call predecessors, (24), 16 states have return successors, (35), 23 states have call predecessors, (35), 23 states have call successors, (35) [2025-03-16 14:04:05,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 203 transitions. [2025-03-16 14:04:05,650 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 203 transitions. Word has length 43 [2025-03-16 14:04:05,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:04:05,651 INFO L471 AbstractCegarLoop]: Abstraction has 157 states and 203 transitions. [2025-03-16 14:04:05,651 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2025-03-16 14:04:05,651 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 203 transitions. [2025-03-16 14:04:05,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2025-03-16 14:04:05,652 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:04:05,652 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:04:05,658 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-03-16 14:04:05,852 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 [2025-03-16 14:04:05,852 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:04:05,853 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:04:05,853 INFO L85 PathProgramCache]: Analyzing trace with hash 1620875216, now seen corresponding path program 1 times [2025-03-16 14:04:05,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-16 14:04:05,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2086332955] [2025-03-16 14:04:05,853 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:04:05,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:04:05,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:04:05,855 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) [2025-03-16 14:04:05,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-16 14:04:05,888 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 43 statements into 1 equivalence classes. [2025-03-16 14:04:05,897 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 43 of 43 statements. [2025-03-16 14:04:05,897 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:04:05,897 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:04:05,898 INFO L256 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-03-16 14:04:05,899 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:04:05,968 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-16 14:04:05,969 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-16 14:04:05,969 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-16 14:04:05,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086332955] [2025-03-16 14:04:05,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086332955] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:04:05,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 14:04:05,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2025-03-16 14:04:05,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629395244] [2025-03-16 14:04:05,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:04:05,970 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-03-16 14:04:05,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-16 14:04:05,970 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-03-16 14:04:05,970 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2025-03-16 14:04:05,970 INFO L87 Difference]: Start difference. First operand 157 states and 203 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2025-03-16 14:04:06,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:04:06,118 INFO L93 Difference]: Finished difference Result 216 states and 282 transitions. [2025-03-16 14:04:06,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-16 14:04:06,118 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 43 [2025-03-16 14:04:06,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:04:06,120 INFO L225 Difference]: With dead ends: 216 [2025-03-16 14:04:06,120 INFO L226 Difference]: Without dead ends: 209 [2025-03-16 14:04:06,121 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2025-03-16 14:04:06,121 INFO L435 NwaCegarLoop]: 57 mSDtfsCounter, 23 mSDsluCounter, 484 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 541 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 14:04:06,121 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 541 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 14:04:06,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2025-03-16 14:04:06,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 171. [2025-03-16 14:04:06,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 126 states have (on average 1.2301587301587302) internal successors, (155), 130 states have internal predecessors, (155), 27 states have call successors, (27), 13 states have call predecessors, (27), 17 states have return successors, (42), 27 states have call predecessors, (42), 26 states have call successors, (42) [2025-03-16 14:04:06,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 224 transitions. [2025-03-16 14:04:06,137 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 224 transitions. Word has length 43 [2025-03-16 14:04:06,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:04:06,137 INFO L471 AbstractCegarLoop]: Abstraction has 171 states and 224 transitions. [2025-03-16 14:04:06,137 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2025-03-16 14:04:06,137 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 224 transitions. [2025-03-16 14:04:06,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2025-03-16 14:04:06,139 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:04:06,139 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:04:06,145 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2025-03-16 14:04:06,343 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 [2025-03-16 14:04:06,343 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:04:06,343 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:04:06,344 INFO L85 PathProgramCache]: Analyzing trace with hash 690012434, now seen corresponding path program 1 times [2025-03-16 14:04:06,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-16 14:04:06,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [465336964] [2025-03-16 14:04:06,344 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:04:06,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:04:06,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:04:06,345 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) [2025-03-16 14:04:06,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-16 14:04:06,373 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 45 statements into 1 equivalence classes. [2025-03-16 14:04:06,382 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 45 of 45 statements. [2025-03-16 14:04:06,382 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:04:06,382 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:04:06,384 INFO L256 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-03-16 14:04:06,384 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:04:06,420 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-03-16 14:04:06,420 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-16 14:04:06,421 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-16 14:04:06,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465336964] [2025-03-16 14:04:06,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465336964] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:04:06,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 14:04:06,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-16 14:04:06,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003490946] [2025-03-16 14:04:06,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:04:06,421 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-16 14:04:06,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-16 14:04:06,422 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-16 14:04:06,422 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-03-16 14:04:06,422 INFO L87 Difference]: Start difference. First operand 171 states and 224 transitions. Second operand has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2025-03-16 14:04:06,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:04:06,454 INFO L93 Difference]: Finished difference Result 179 states and 231 transitions. [2025-03-16 14:04:06,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-16 14:04:06,454 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 45 [2025-03-16 14:04:06,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:04:06,456 INFO L225 Difference]: With dead ends: 179 [2025-03-16 14:04:06,456 INFO L226 Difference]: Without dead ends: 171 [2025-03-16 14:04:06,457 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2025-03-16 14:04:06,457 INFO L435 NwaCegarLoop]: 64 mSDtfsCounter, 3 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 14:04:06,457 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 307 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 14:04:06,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2025-03-16 14:04:06,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2025-03-16 14:04:06,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 126 states have (on average 1.2222222222222223) internal successors, (154), 130 states have internal predecessors, (154), 27 states have call successors, (27), 13 states have call predecessors, (27), 17 states have return successors, (42), 27 states have call predecessors, (42), 26 states have call successors, (42) [2025-03-16 14:04:06,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 223 transitions. [2025-03-16 14:04:06,470 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 223 transitions. Word has length 45 [2025-03-16 14:04:06,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:04:06,471 INFO L471 AbstractCegarLoop]: Abstraction has 171 states and 223 transitions. [2025-03-16 14:04:06,471 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2025-03-16 14:04:06,471 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 223 transitions. [2025-03-16 14:04:06,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2025-03-16 14:04:06,472 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:04:06,472 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:04:06,478 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2025-03-16 14:04:06,673 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 [2025-03-16 14:04:06,673 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:04:06,673 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:04:06,673 INFO L85 PathProgramCache]: Analyzing trace with hash 661383283, now seen corresponding path program 1 times [2025-03-16 14:04:06,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-16 14:04:06,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1827758020] [2025-03-16 14:04:06,674 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:04:06,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:04:06,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:04:06,675 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) [2025-03-16 14:04:06,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-03-16 14:04:06,700 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 45 statements into 1 equivalence classes. [2025-03-16 14:04:06,709 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 45 of 45 statements. [2025-03-16 14:04:06,709 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:04:06,709 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:04:06,710 INFO L256 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-03-16 14:04:06,711 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:04:06,782 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-16 14:04:06,783 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 14:04:06,886 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-16 14:04:06,887 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-16 14:04:06,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827758020] [2025-03-16 14:04:06,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827758020] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 14:04:06,888 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-16 14:04:06,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2025-03-16 14:04:06,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78700235] [2025-03-16 14:04:06,889 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-16 14:04:06,889 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-16 14:04:06,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-16 14:04:06,889 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-16 14:04:06,889 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2025-03-16 14:04:06,889 INFO L87 Difference]: Start difference. First operand 171 states and 223 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 12 states have internal predecessors, (34), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2025-03-16 14:04:07,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:04:07,070 INFO L93 Difference]: Finished difference Result 223 states and 287 transitions. [2025-03-16 14:04:07,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-16 14:04:07,071 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 12 states have internal predecessors, (34), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 45 [2025-03-16 14:04:07,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:04:07,072 INFO L225 Difference]: With dead ends: 223 [2025-03-16 14:04:07,072 INFO L226 Difference]: Without dead ends: 212 [2025-03-16 14:04:07,072 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2025-03-16 14:04:07,072 INFO L435 NwaCegarLoop]: 57 mSDtfsCounter, 33 mSDsluCounter, 532 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 589 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 14:04:07,073 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 589 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 14:04:07,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2025-03-16 14:04:07,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 179. [2025-03-16 14:04:07,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 132 states have (on average 1.2121212121212122) internal successors, (160), 136 states have internal predecessors, (160), 28 states have call successors, (28), 13 states have call predecessors, (28), 18 states have return successors, (43), 29 states have call predecessors, (43), 26 states have call successors, (43) [2025-03-16 14:04:07,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 231 transitions. [2025-03-16 14:04:07,085 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 231 transitions. Word has length 45 [2025-03-16 14:04:07,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:04:07,085 INFO L471 AbstractCegarLoop]: Abstraction has 179 states and 231 transitions. [2025-03-16 14:04:07,085 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 12 states have internal predecessors, (34), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2025-03-16 14:04:07,085 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 231 transitions. [2025-03-16 14:04:07,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2025-03-16 14:04:07,086 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:04:07,086 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:04:07,093 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2025-03-16 14:04:07,287 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 [2025-03-16 14:04:07,287 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:04:07,287 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:04:07,287 INFO L85 PathProgramCache]: Analyzing trace with hash -520166633, now seen corresponding path program 1 times [2025-03-16 14:04:07,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-16 14:04:07,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [241909981] [2025-03-16 14:04:07,288 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:04:07,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:04:07,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:04:07,289 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) [2025-03-16 14:04:07,290 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-03-16 14:04:07,314 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 46 statements into 1 equivalence classes. [2025-03-16 14:04:07,322 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 46 of 46 statements. [2025-03-16 14:04:07,322 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:04:07,322 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:04:07,323 INFO L256 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-16 14:04:07,324 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:04:07,414 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-16 14:04:07,415 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 14:04:07,555 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-16 14:04:07,555 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-16 14:04:07,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241909981] [2025-03-16 14:04:07,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241909981] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 14:04:07,555 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-16 14:04:07,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2025-03-16 14:04:07,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255351245] [2025-03-16 14:04:07,555 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-16 14:04:07,555 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-16 14:04:07,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-16 14:04:07,556 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-16 14:04:07,556 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2025-03-16 14:04:07,556 INFO L87 Difference]: Start difference. First operand 179 states and 231 transitions. Second operand has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 states have internal predecessors, (35), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2025-03-16 14:04:07,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:04:07,916 INFO L93 Difference]: Finished difference Result 255 states and 339 transitions. [2025-03-16 14:04:07,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-03-16 14:04:07,916 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 states have internal predecessors, (35), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 46 [2025-03-16 14:04:07,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:04:07,917 INFO L225 Difference]: With dead ends: 255 [2025-03-16 14:04:07,917 INFO L226 Difference]: Without dead ends: 248 [2025-03-16 14:04:07,918 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2025-03-16 14:04:07,918 INFO L435 NwaCegarLoop]: 76 mSDtfsCounter, 45 mSDsluCounter, 759 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 835 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-16 14:04:07,918 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 835 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-16 14:04:07,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2025-03-16 14:04:07,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 189. [2025-03-16 14:04:07,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 138 states have (on average 1.2028985507246377) internal successors, (166), 144 states have internal predecessors, (166), 30 states have call successors, (30), 13 states have call predecessors, (30), 20 states have return successors, (49), 31 states have call predecessors, (49), 28 states have call successors, (49) [2025-03-16 14:04:07,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 245 transitions. [2025-03-16 14:04:07,932 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 245 transitions. Word has length 46 [2025-03-16 14:04:07,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:04:07,932 INFO L471 AbstractCegarLoop]: Abstraction has 189 states and 245 transitions. [2025-03-16 14:04:07,932 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 states have internal predecessors, (35), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2025-03-16 14:04:07,932 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 245 transitions. [2025-03-16 14:04:07,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2025-03-16 14:04:07,933 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:04:07,933 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:04:07,939 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2025-03-16 14:04:08,138 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:04:08,138 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:04:08,138 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:04:08,138 INFO L85 PathProgramCache]: Analyzing trace with hash 69209700, now seen corresponding path program 1 times [2025-03-16 14:04:08,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-16 14:04:08,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [544644701] [2025-03-16 14:04:08,138 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:04:08,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:04:08,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:04:08,141 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) [2025-03-16 14:04:08,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-03-16 14:04:08,168 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 46 statements into 1 equivalence classes. [2025-03-16 14:04:08,180 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 46 of 46 statements. [2025-03-16 14:04:08,180 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:04:08,180 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:04:08,184 INFO L256 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-16 14:04:08,185 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:04:08,270 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2025-03-16 14:04:08,270 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 14:04:08,541 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2025-03-16 14:04:08,542 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-16 14:04:08,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544644701] [2025-03-16 14:04:08,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544644701] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 14:04:08,542 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-16 14:04:08,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2025-03-16 14:04:08,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261171655] [2025-03-16 14:04:08,542 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-16 14:04:08,542 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-03-16 14:04:08,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-16 14:04:08,542 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-03-16 14:04:08,542 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=496, Unknown=0, NotChecked=0, Total=552 [2025-03-16 14:04:08,543 INFO L87 Difference]: Start difference. First operand 189 states and 245 transitions. Second operand has 24 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 20 states have internal predecessors, (41), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2025-03-16 14:04:09,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:04:09,293 INFO L93 Difference]: Finished difference Result 269 states and 369 transitions. [2025-03-16 14:04:09,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2025-03-16 14:04:09,294 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 20 states have internal predecessors, (41), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 46 [2025-03-16 14:04:09,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:04:09,295 INFO L225 Difference]: With dead ends: 269 [2025-03-16 14:04:09,295 INFO L226 Difference]: Without dead ends: 254 [2025-03-16 14:04:09,295 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=156, Invalid=1404, Unknown=0, NotChecked=0, Total=1560 [2025-03-16 14:04:09,296 INFO L435 NwaCegarLoop]: 67 mSDtfsCounter, 73 mSDsluCounter, 889 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 956 SdHoareTripleChecker+Invalid, 582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-03-16 14:04:09,296 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 956 Invalid, 582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 562 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-03-16 14:04:09,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2025-03-16 14:04:09,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 195. [2025-03-16 14:04:09,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 142 states have (on average 1.204225352112676) internal successors, (171), 151 states have internal predecessors, (171), 30 states have call successors, (30), 13 states have call predecessors, (30), 22 states have return successors, (58), 30 states have call predecessors, (58), 28 states have call successors, (58) [2025-03-16 14:04:09,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 259 transitions. [2025-03-16 14:04:09,315 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 259 transitions. Word has length 46 [2025-03-16 14:04:09,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:04:09,316 INFO L471 AbstractCegarLoop]: Abstraction has 195 states and 259 transitions. [2025-03-16 14:04:09,316 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 20 states have internal predecessors, (41), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2025-03-16 14:04:09,316 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 259 transitions. [2025-03-16 14:04:09,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2025-03-16 14:04:09,317 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:04:09,317 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:04:09,323 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2025-03-16 14:04:09,520 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:04:09,520 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:04:09,521 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:04:09,521 INFO L85 PathProgramCache]: Analyzing trace with hash 1854400701, now seen corresponding path program 2 times [2025-03-16 14:04:09,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-16 14:04:09,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [684960930] [2025-03-16 14:04:09,521 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 14:04:09,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:04:09,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:04:09,524 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) [2025-03-16 14:04:09,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-03-16 14:04:09,549 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 46 statements into 2 equivalence classes. [2025-03-16 14:04:09,558 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 46 of 46 statements. [2025-03-16 14:04:09,558 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 14:04:09,558 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:04:09,559 INFO L256 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-03-16 14:04:09,560 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:04:09,629 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-16 14:04:09,630 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 14:04:09,725 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-16 14:04:09,725 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-16 14:04:09,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684960930] [2025-03-16 14:04:09,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684960930] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 14:04:09,725 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-16 14:04:09,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2025-03-16 14:04:09,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975055214] [2025-03-16 14:04:09,726 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-16 14:04:09,726 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-16 14:04:09,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-16 14:04:09,727 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-16 14:04:09,727 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2025-03-16 14:04:09,727 INFO L87 Difference]: Start difference. First operand 195 states and 259 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 12 states have internal predecessors, (35), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2025-03-16 14:04:10,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:04:10,023 INFO L93 Difference]: Finished difference Result 253 states and 353 transitions. [2025-03-16 14:04:10,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-03-16 14:04:10,023 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 12 states have internal predecessors, (35), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 46 [2025-03-16 14:04:10,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:04:10,025 INFO L225 Difference]: With dead ends: 253 [2025-03-16 14:04:10,025 INFO L226 Difference]: Without dead ends: 246 [2025-03-16 14:04:10,026 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2025-03-16 14:04:10,027 INFO L435 NwaCegarLoop]: 78 mSDtfsCounter, 59 mSDsluCounter, 694 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 772 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-16 14:04:10,027 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 772 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 310 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-16 14:04:10,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2025-03-16 14:04:10,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 197. [2025-03-16 14:04:10,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 143 states have (on average 1.2027972027972027) internal successors, (172), 152 states have internal predecessors, (172), 31 states have call successors, (31), 13 states have call predecessors, (31), 22 states have return successors, (59), 31 states have call predecessors, (59), 29 states have call successors, (59) [2025-03-16 14:04:10,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 262 transitions. [2025-03-16 14:04:10,047 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 262 transitions. Word has length 46 [2025-03-16 14:04:10,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:04:10,047 INFO L471 AbstractCegarLoop]: Abstraction has 197 states and 262 transitions. [2025-03-16 14:04:10,047 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 12 states have internal predecessors, (35), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2025-03-16 14:04:10,047 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 262 transitions. [2025-03-16 14:04:10,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2025-03-16 14:04:10,049 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:04:10,049 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:04:10,054 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2025-03-16 14:04:10,249 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 [2025-03-16 14:04:10,249 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:04:10,249 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:04:10,249 INFO L85 PathProgramCache]: Analyzing trace with hash 321102088, now seen corresponding path program 1 times [2025-03-16 14:04:10,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-16 14:04:10,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1418814820] [2025-03-16 14:04:10,250 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:04:10,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:04:10,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:04:10,251 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) [2025-03-16 14:04:10,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-03-16 14:04:10,276 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 46 statements into 1 equivalence classes. [2025-03-16 14:04:10,285 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 46 of 46 statements. [2025-03-16 14:04:10,285 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:04:10,285 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:04:10,285 INFO L256 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-03-16 14:04:10,286 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:04:10,446 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-16 14:04:10,446 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-16 14:04:10,446 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-16 14:04:10,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418814820] [2025-03-16 14:04:10,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418814820] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:04:10,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 14:04:10,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2025-03-16 14:04:10,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814574449] [2025-03-16 14:04:10,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:04:10,447 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-16 14:04:10,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-16 14:04:10,447 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-16 14:04:10,447 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2025-03-16 14:04:10,447 INFO L87 Difference]: Start difference. First operand 197 states and 262 transitions. Second operand has 14 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2025-03-16 14:04:10,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:04:10,647 INFO L93 Difference]: Finished difference Result 296 states and 402 transitions. [2025-03-16 14:04:10,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-03-16 14:04:10,647 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 46 [2025-03-16 14:04:10,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:04:10,648 INFO L225 Difference]: With dead ends: 296 [2025-03-16 14:04:10,648 INFO L226 Difference]: Without dead ends: 237 [2025-03-16 14:04:10,649 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2025-03-16 14:04:10,649 INFO L435 NwaCegarLoop]: 84 mSDtfsCounter, 32 mSDsluCounter, 844 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 928 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 14:04:10,649 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 928 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 14:04:10,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2025-03-16 14:04:10,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 216. [2025-03-16 14:04:10,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 157 states have (on average 1.178343949044586) internal successors, (185), 166 states have internal predecessors, (185), 35 states have call successors, (35), 14 states have call predecessors, (35), 23 states have return successors, (63), 35 states have call predecessors, (63), 33 states have call successors, (63) [2025-03-16 14:04:10,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 283 transitions. [2025-03-16 14:04:10,674 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 283 transitions. Word has length 46 [2025-03-16 14:04:10,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:04:10,674 INFO L471 AbstractCegarLoop]: Abstraction has 216 states and 283 transitions. [2025-03-16 14:04:10,674 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2025-03-16 14:04:10,674 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 283 transitions. [2025-03-16 14:04:10,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2025-03-16 14:04:10,675 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:04:10,675 INFO L218 NwaCegarLoop]: trace histogram [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] [2025-03-16 14:04:10,682 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2025-03-16 14:04:10,876 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:04:10,876 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:04:10,876 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:04:10,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1798176549, now seen corresponding path program 1 times [2025-03-16 14:04:10,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-16 14:04:10,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [491624842] [2025-03-16 14:04:10,877 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:04:10,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:04:10,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:04:10,879 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) [2025-03-16 14:04:10,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-03-16 14:04:10,906 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 46 statements into 1 equivalence classes. [2025-03-16 14:04:10,915 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 46 of 46 statements. [2025-03-16 14:04:10,915 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:04:10,915 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:04:10,916 INFO L256 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-03-16 14:04:10,917 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:04:11,061 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2025-03-16 14:04:11,061 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 14:04:11,232 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-16 14:04:11,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491624842] [2025-03-16 14:04:11,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491624842] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 14:04:11,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1828490157] [2025-03-16 14:04:11,232 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:04:11,232 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2025-03-16 14:04:11,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2025-03-16 14:04:11,234 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2025-03-16 14:04:11,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2025-03-16 14:04:11,266 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 46 statements into 1 equivalence classes. [2025-03-16 14:04:11,289 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 46 of 46 statements. [2025-03-16 14:04:11,289 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:04:11,289 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:04:11,290 INFO L256 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-16 14:04:11,290 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:04:11,360 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2025-03-16 14:04:11,360 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 14:04:11,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1828490157] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 14:04:11,497 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-16 14:04:11,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 13 [2025-03-16 14:04:11,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963452517] [2025-03-16 14:04:11,497 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-16 14:04:11,497 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-16 14:04:11,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-16 14:04:11,497 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-16 14:04:11,497 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2025-03-16 14:04:11,498 INFO L87 Difference]: Start difference. First operand 216 states and 283 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 11 states have internal predecessors, (33), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2025-03-16 14:04:11,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:04:11,738 INFO L93 Difference]: Finished difference Result 288 states and 373 transitions. [2025-03-16 14:04:11,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-16 14:04:11,738 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 11 states have internal predecessors, (33), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 46 [2025-03-16 14:04:11,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:04:11,740 INFO L225 Difference]: With dead ends: 288 [2025-03-16 14:04:11,740 INFO L226 Difference]: Without dead ends: 236 [2025-03-16 14:04:11,741 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 89 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2025-03-16 14:04:11,741 INFO L435 NwaCegarLoop]: 81 mSDtfsCounter, 38 mSDsluCounter, 733 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 814 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-16 14:04:11,741 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 814 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-16 14:04:11,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2025-03-16 14:04:11,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 222. [2025-03-16 14:04:11,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 162 states have (on average 1.1666666666666667) internal successors, (189), 171 states have internal predecessors, (189), 35 states have call successors, (35), 15 states have call predecessors, (35), 24 states have return successors, (63), 35 states have call predecessors, (63), 33 states have call successors, (63) [2025-03-16 14:04:11,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 287 transitions. [2025-03-16 14:04:11,761 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 287 transitions. Word has length 46 [2025-03-16 14:04:11,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:04:11,761 INFO L471 AbstractCegarLoop]: Abstraction has 222 states and 287 transitions. [2025-03-16 14:04:11,761 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 11 states have internal predecessors, (33), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2025-03-16 14:04:11,761 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 287 transitions. [2025-03-16 14:04:11,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2025-03-16 14:04:11,762 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:04:11,762 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:04:11,765 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (20)] Ended with exit code 0 [2025-03-16 14:04:11,968 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2025-03-16 14:04:12,163 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:04:12,163 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:04:12,163 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:04:12,164 INFO L85 PathProgramCache]: Analyzing trace with hash -980755248, now seen corresponding path program 2 times [2025-03-16 14:04:12,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-16 14:04:12,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1164587436] [2025-03-16 14:04:12,164 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 14:04:12,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:04:12,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:04:12,166 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) [2025-03-16 14:04:12,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2025-03-16 14:04:12,190 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 46 statements into 2 equivalence classes. [2025-03-16 14:04:12,204 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 46 of 46 statements. [2025-03-16 14:04:12,204 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 14:04:12,204 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:04:12,207 INFO L256 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-16 14:04:12,208 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:04:12,293 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2025-03-16 14:04:12,293 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 14:04:12,510 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2025-03-16 14:04:12,510 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-16 14:04:12,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164587436] [2025-03-16 14:04:12,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164587436] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 14:04:12,510 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-16 14:04:12,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2025-03-16 14:04:12,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72523008] [2025-03-16 14:04:12,511 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-16 14:04:12,511 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-03-16 14:04:12,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-16 14:04:12,511 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-03-16 14:04:12,511 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=496, Unknown=0, NotChecked=0, Total=552 [2025-03-16 14:04:12,512 INFO L87 Difference]: Start difference. First operand 222 states and 287 transitions. Second operand has 24 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 20 states have internal predecessors, (41), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2025-03-16 14:04:13,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:04:13,174 INFO L93 Difference]: Finished difference Result 286 states and 383 transitions. [2025-03-16 14:04:13,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-03-16 14:04:13,174 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 20 states have internal predecessors, (41), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 46 [2025-03-16 14:04:13,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:04:13,175 INFO L225 Difference]: With dead ends: 286 [2025-03-16 14:04:13,176 INFO L226 Difference]: Without dead ends: 273 [2025-03-16 14:04:13,176 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=137, Invalid=1269, Unknown=0, NotChecked=0, Total=1406 [2025-03-16 14:04:13,176 INFO L435 NwaCegarLoop]: 67 mSDtfsCounter, 65 mSDsluCounter, 1186 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 1253 SdHoareTripleChecker+Invalid, 627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-03-16 14:04:13,176 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 1253 Invalid, 627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 610 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-03-16 14:04:13,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2025-03-16 14:04:13,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 232. [2025-03-16 14:04:13,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 168 states have (on average 1.1607142857142858) internal successors, (195), 179 states have internal predecessors, (195), 37 states have call successors, (37), 15 states have call predecessors, (37), 26 states have return successors, (71), 37 states have call predecessors, (71), 35 states have call successors, (71) [2025-03-16 14:04:13,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 303 transitions. [2025-03-16 14:04:13,195 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 303 transitions. Word has length 46 [2025-03-16 14:04:13,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:04:13,195 INFO L471 AbstractCegarLoop]: Abstraction has 232 states and 303 transitions. [2025-03-16 14:04:13,195 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 20 states have internal predecessors, (41), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2025-03-16 14:04:13,196 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 303 transitions. [2025-03-16 14:04:13,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2025-03-16 14:04:13,196 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:04:13,196 INFO L218 NwaCegarLoop]: trace histogram [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] [2025-03-16 14:04:13,202 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2025-03-16 14:04:13,402 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 [2025-03-16 14:04:13,402 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:04:13,402 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:04:13,402 INFO L85 PathProgramCache]: Analyzing trace with hash -2003519684, now seen corresponding path program 1 times [2025-03-16 14:04:13,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-16 14:04:13,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [225709931] [2025-03-16 14:04:13,403 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:04:13,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:04:13,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:04:13,405 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) [2025-03-16 14:04:13,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2025-03-16 14:04:13,429 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 46 statements into 1 equivalence classes. [2025-03-16 14:04:13,438 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 46 of 46 statements. [2025-03-16 14:04:13,438 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:04:13,438 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:04:13,439 INFO L256 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-03-16 14:04:13,440 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:04:13,586 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2025-03-16 14:04:13,586 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-16 14:04:13,586 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-16 14:04:13,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225709931] [2025-03-16 14:04:13,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225709931] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:04:13,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 14:04:13,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2025-03-16 14:04:13,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846010779] [2025-03-16 14:04:13,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:04:13,586 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-16 14:04:13,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-16 14:04:13,587 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-16 14:04:13,587 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2025-03-16 14:04:13,587 INFO L87 Difference]: Start difference. First operand 232 states and 303 transitions. Second operand has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-16 14:04:13,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:04:13,865 INFO L93 Difference]: Finished difference Result 299 states and 392 transitions. [2025-03-16 14:04:13,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-16 14:04:13,866 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 46 [2025-03-16 14:04:13,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:04:13,867 INFO L225 Difference]: With dead ends: 299 [2025-03-16 14:04:13,867 INFO L226 Difference]: Without dead ends: 247 [2025-03-16 14:04:13,867 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2025-03-16 14:04:13,868 INFO L435 NwaCegarLoop]: 83 mSDtfsCounter, 40 mSDsluCounter, 827 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 910 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-16 14:04:13,868 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 910 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-16 14:04:13,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2025-03-16 14:04:13,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 232. [2025-03-16 14:04:13,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 168 states have (on average 1.1547619047619047) internal successors, (194), 179 states have internal predecessors, (194), 37 states have call successors, (37), 15 states have call predecessors, (37), 26 states have return successors, (71), 37 states have call predecessors, (71), 35 states have call successors, (71) [2025-03-16 14:04:13,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 302 transitions. [2025-03-16 14:04:13,887 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 302 transitions. Word has length 46 [2025-03-16 14:04:13,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:04:13,887 INFO L471 AbstractCegarLoop]: Abstraction has 232 states and 302 transitions. [2025-03-16 14:04:13,887 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-16 14:04:13,887 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 302 transitions. [2025-03-16 14:04:13,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2025-03-16 14:04:13,888 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:04:13,888 INFO L218 NwaCegarLoop]: trace histogram [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, 1, 1] [2025-03-16 14:04:13,895 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2025-03-16 14:04:14,092 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 [2025-03-16 14:04:14,092 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:04:14,092 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:04:14,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1251091870, now seen corresponding path program 1 times [2025-03-16 14:04:14,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-16 14:04:14,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1947662579] [2025-03-16 14:04:14,092 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:04:14,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:04:14,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:04:14,094 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) [2025-03-16 14:04:14,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2025-03-16 14:04:14,121 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 51 statements into 1 equivalence classes. [2025-03-16 14:04:14,130 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 51 of 51 statements. [2025-03-16 14:04:14,130 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:04:14,130 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:04:14,131 INFO L256 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-16 14:04:14,132 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:04:14,171 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2025-03-16 14:04:14,171 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-16 14:04:14,171 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-16 14:04:14,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947662579] [2025-03-16 14:04:14,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947662579] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:04:14,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 14:04:14,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-03-16 14:04:14,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484437347] [2025-03-16 14:04:14,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:04:14,172 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-16 14:04:14,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-16 14:04:14,173 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-16 14:04:14,173 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2025-03-16 14:04:14,173 INFO L87 Difference]: Start difference. First operand 232 states and 302 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 7 states have internal predecessors, (34), 3 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2025-03-16 14:04:14,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:04:14,230 INFO L93 Difference]: Finished difference Result 296 states and 377 transitions. [2025-03-16 14:04:14,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-16 14:04:14,231 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 7 states have internal predecessors, (34), 3 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 51 [2025-03-16 14:04:14,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:04:14,232 INFO L225 Difference]: With dead ends: 296 [2025-03-16 14:04:14,232 INFO L226 Difference]: Without dead ends: 245 [2025-03-16 14:04:14,232 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2025-03-16 14:04:14,233 INFO L435 NwaCegarLoop]: 61 mSDtfsCounter, 11 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 469 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 [2025-03-16 14:04:14,233 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 469 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 14:04:14,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2025-03-16 14:04:14,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 230. [2025-03-16 14:04:14,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 167 states have (on average 1.155688622754491) internal successors, (193), 178 states have internal predecessors, (193), 36 states have call successors, (36), 15 states have call predecessors, (36), 26 states have return successors, (69), 36 states have call predecessors, (69), 34 states have call successors, (69) [2025-03-16 14:04:14,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 298 transitions. [2025-03-16 14:04:14,256 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 298 transitions. Word has length 51 [2025-03-16 14:04:14,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:04:14,256 INFO L471 AbstractCegarLoop]: Abstraction has 230 states and 298 transitions. [2025-03-16 14:04:14,256 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 7 states have internal predecessors, (34), 3 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2025-03-16 14:04:14,256 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 298 transitions. [2025-03-16 14:04:14,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2025-03-16 14:04:14,257 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:04:14,257 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:04:14,263 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2025-03-16 14:04:14,457 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 [2025-03-16 14:04:14,457 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:04:14,458 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:04:14,458 INFO L85 PathProgramCache]: Analyzing trace with hash 172168975, now seen corresponding path program 1 times [2025-03-16 14:04:14,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-16 14:04:14,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [451174432] [2025-03-16 14:04:14,458 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:04:14,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:04:14,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:04:14,460 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) [2025-03-16 14:04:14,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2025-03-16 14:04:14,489 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 46 statements into 1 equivalence classes. [2025-03-16 14:04:14,499 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 46 of 46 statements. [2025-03-16 14:04:14,500 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:04:14,500 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:04:14,500 INFO L256 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-03-16 14:04:14,501 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:04:14,666 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-16 14:04:14,666 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 14:04:14,784 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-16 14:04:14,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451174432] [2025-03-16 14:04:14,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451174432] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 14:04:14,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2071382988] [2025-03-16 14:04:14,784 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:04:14,784 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2025-03-16 14:04:14,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2025-03-16 14:04:14,786 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2025-03-16 14:04:14,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2025-03-16 14:04:14,816 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 46 statements into 1 equivalence classes. [2025-03-16 14:04:14,840 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 46 of 46 statements. [2025-03-16 14:04:14,840 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:04:14,840 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:04:14,841 INFO L256 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-16 14:04:14,842 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:04:14,896 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-16 14:04:14,896 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-16 14:04:14,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2071382988] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:04:14,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-16 14:04:14,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 10 [2025-03-16 14:04:14,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10256881] [2025-03-16 14:04:14,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:04:14,896 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-16 14:04:14,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-16 14:04:14,897 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-16 14:04:14,897 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2025-03-16 14:04:14,897 INFO L87 Difference]: Start difference. First operand 230 states and 298 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-16 14:04:14,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:04:14,985 INFO L93 Difference]: Finished difference Result 253 states and 332 transitions. [2025-03-16 14:04:14,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-16 14:04:14,985 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 46 [2025-03-16 14:04:14,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:04:14,986 INFO L225 Difference]: With dead ends: 253 [2025-03-16 14:04:14,986 INFO L226 Difference]: Without dead ends: 251 [2025-03-16 14:04:14,986 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 85 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2025-03-16 14:04:14,987 INFO L435 NwaCegarLoop]: 61 mSDtfsCounter, 10 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 14:04:14,987 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 290 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 14:04:14,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2025-03-16 14:04:15,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 235. [2025-03-16 14:04:15,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 170 states have (on average 1.1529411764705881) internal successors, (196), 182 states have internal predecessors, (196), 37 states have call successors, (37), 16 states have call predecessors, (37), 27 states have return successors, (70), 36 states have call predecessors, (70), 35 states have call successors, (70) [2025-03-16 14:04:15,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 303 transitions. [2025-03-16 14:04:15,004 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 303 transitions. Word has length 46 [2025-03-16 14:04:15,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:04:15,005 INFO L471 AbstractCegarLoop]: Abstraction has 235 states and 303 transitions. [2025-03-16 14:04:15,005 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-16 14:04:15,005 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 303 transitions. [2025-03-16 14:04:15,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2025-03-16 14:04:15,006 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:04:15,006 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:04:15,008 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (25)] Ended with exit code 0 [2025-03-16 14:04:15,211 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2025-03-16 14:04:15,406 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:04:15,406 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:04:15,406 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:04:15,407 INFO L85 PathProgramCache]: Analyzing trace with hash 1299079248, now seen corresponding path program 1 times [2025-03-16 14:04:15,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-16 14:04:15,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1507684418] [2025-03-16 14:04:15,407 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:04:15,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:04:15,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:04:15,409 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) [2025-03-16 14:04:15,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2025-03-16 14:04:15,432 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 47 statements into 1 equivalence classes. [2025-03-16 14:04:15,440 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 47 of 47 statements. [2025-03-16 14:04:15,440 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:04:15,440 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:04:15,441 INFO L256 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-03-16 14:04:15,442 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:04:15,558 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-16 14:04:15,558 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-16 14:04:15,559 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-16 14:04:15,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507684418] [2025-03-16 14:04:15,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507684418] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:04:15,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 14:04:15,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2025-03-16 14:04:15,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598568212] [2025-03-16 14:04:15,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:04:15,559 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-16 14:04:15,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-16 14:04:15,559 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-16 14:04:15,559 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2025-03-16 14:04:15,559 INFO L87 Difference]: Start difference. First operand 235 states and 303 transitions. Second operand has 14 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 5 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2025-03-16 14:04:15,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:04:15,718 INFO L93 Difference]: Finished difference Result 289 states and 372 transitions. [2025-03-16 14:04:15,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-16 14:04:15,718 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 5 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 47 [2025-03-16 14:04:15,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:04:15,719 INFO L225 Difference]: With dead ends: 289 [2025-03-16 14:04:15,719 INFO L226 Difference]: Without dead ends: 250 [2025-03-16 14:04:15,719 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2025-03-16 14:04:15,720 INFO L435 NwaCegarLoop]: 91 mSDtfsCounter, 24 mSDsluCounter, 849 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 940 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 14:04:15,720 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 940 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 14:04:15,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2025-03-16 14:04:15,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 226. [2025-03-16 14:04:15,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 165 states have (on average 1.1454545454545455) internal successors, (189), 176 states have internal predecessors, (189), 34 states have call successors, (34), 16 states have call predecessors, (34), 26 states have return successors, (66), 33 states have call predecessors, (66), 32 states have call successors, (66) [2025-03-16 14:04:15,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 289 transitions. [2025-03-16 14:04:15,744 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 289 transitions. Word has length 47 [2025-03-16 14:04:15,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:04:15,744 INFO L471 AbstractCegarLoop]: Abstraction has 226 states and 289 transitions. [2025-03-16 14:04:15,744 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 5 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2025-03-16 14:04:15,744 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 289 transitions. [2025-03-16 14:04:15,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2025-03-16 14:04:15,745 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:04:15,745 INFO L218 NwaCegarLoop]: trace histogram [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] [2025-03-16 14:04:15,752 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2025-03-16 14:04:15,950 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 [2025-03-16 14:04:15,950 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:04:15,951 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:04:15,951 INFO L85 PathProgramCache]: Analyzing trace with hash 25950941, now seen corresponding path program 1 times [2025-03-16 14:04:15,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-16 14:04:15,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [887409725] [2025-03-16 14:04:15,951 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:04:15,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:04:15,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:04:15,952 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) [2025-03-16 14:04:15,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2025-03-16 14:04:15,977 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 47 statements into 1 equivalence classes. [2025-03-16 14:04:15,985 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 47 of 47 statements. [2025-03-16 14:04:15,985 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:04:15,985 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:04:15,986 INFO L256 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-16 14:04:15,986 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:04:16,029 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2025-03-16 14:04:16,029 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 14:04:16,101 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2025-03-16 14:04:16,101 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-16 14:04:16,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887409725] [2025-03-16 14:04:16,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887409725] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 14:04:16,101 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-16 14:04:16,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2025-03-16 14:04:16,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851324164] [2025-03-16 14:04:16,101 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-16 14:04:16,102 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-03-16 14:04:16,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-16 14:04:16,102 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-03-16 14:04:16,102 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2025-03-16 14:04:16,102 INFO L87 Difference]: Start difference. First operand 226 states and 289 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 11 states have internal predecessors, (39), 5 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2025-03-16 14:04:16,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:04:16,224 INFO L93 Difference]: Finished difference Result 300 states and 380 transitions. [2025-03-16 14:04:16,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-16 14:04:16,225 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 11 states have internal predecessors, (39), 5 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 47 [2025-03-16 14:04:16,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:04:16,226 INFO L225 Difference]: With dead ends: 300 [2025-03-16 14:04:16,226 INFO L226 Difference]: Without dead ends: 243 [2025-03-16 14:04:16,226 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2025-03-16 14:04:16,226 INFO L435 NwaCegarLoop]: 85 mSDtfsCounter, 39 mSDsluCounter, 846 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 931 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 14:04:16,226 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 931 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 14:04:16,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2025-03-16 14:04:16,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 221. [2025-03-16 14:04:16,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 162 states have (on average 1.1419753086419753) internal successors, (185), 172 states have internal predecessors, (185), 33 states have call successors, (33), 16 states have call predecessors, (33), 25 states have return successors, (64), 32 states have call predecessors, (64), 31 states have call successors, (64) [2025-03-16 14:04:16,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 282 transitions. [2025-03-16 14:04:16,250 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 282 transitions. Word has length 47 [2025-03-16 14:04:16,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:04:16,250 INFO L471 AbstractCegarLoop]: Abstraction has 221 states and 282 transitions. [2025-03-16 14:04:16,250 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 11 states have internal predecessors, (39), 5 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2025-03-16 14:04:16,250 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 282 transitions. [2025-03-16 14:04:16,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2025-03-16 14:04:16,251 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:04:16,251 INFO L218 NwaCegarLoop]: trace histogram [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] [2025-03-16 14:04:16,258 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2025-03-16 14:04:16,451 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 [2025-03-16 14:04:16,451 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:04:16,452 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:04:16,452 INFO L85 PathProgramCache]: Analyzing trace with hash -2044718948, now seen corresponding path program 1 times [2025-03-16 14:04:16,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-16 14:04:16,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1163639384] [2025-03-16 14:04:16,452 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:04:16,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:04:16,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:04:16,454 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) [2025-03-16 14:04:16,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2025-03-16 14:04:16,478 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 47 statements into 1 equivalence classes. [2025-03-16 14:04:16,487 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 47 of 47 statements. [2025-03-16 14:04:16,487 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:04:16,487 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:04:16,488 INFO L256 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-16 14:04:16,489 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:04:16,531 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2025-03-16 14:04:16,531 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-16 14:04:16,531 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-16 14:04:16,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163639384] [2025-03-16 14:04:16,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163639384] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:04:16,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 14:04:16,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2025-03-16 14:04:16,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500005427] [2025-03-16 14:04:16,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:04:16,532 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-16 14:04:16,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-16 14:04:16,532 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-16 14:04:16,532 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2025-03-16 14:04:16,532 INFO L87 Difference]: Start difference. First operand 221 states and 282 transitions. Second operand has 10 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-16 14:04:16,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:04:16,636 INFO L93 Difference]: Finished difference Result 287 states and 364 transitions. [2025-03-16 14:04:16,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-16 14:04:16,637 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 47 [2025-03-16 14:04:16,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:04:16,638 INFO L225 Difference]: With dead ends: 287 [2025-03-16 14:04:16,638 INFO L226 Difference]: Without dead ends: 230 [2025-03-16 14:04:16,638 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2025-03-16 14:04:16,639 INFO L435 NwaCegarLoop]: 77 mSDtfsCounter, 34 mSDsluCounter, 569 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 646 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 14:04:16,639 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 646 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 14:04:16,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2025-03-16 14:04:16,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 216. [2025-03-16 14:04:16,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 159 states have (on average 1.1383647798742138) internal successors, (181), 168 states have internal predecessors, (181), 32 states have call successors, (32), 16 states have call predecessors, (32), 24 states have return successors, (62), 31 states have call predecessors, (62), 30 states have call successors, (62) [2025-03-16 14:04:16,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 275 transitions. [2025-03-16 14:04:16,660 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 275 transitions. Word has length 47 [2025-03-16 14:04:16,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:04:16,660 INFO L471 AbstractCegarLoop]: Abstraction has 216 states and 275 transitions. [2025-03-16 14:04:16,660 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-16 14:04:16,660 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 275 transitions. [2025-03-16 14:04:16,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2025-03-16 14:04:16,662 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:04:16,662 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:04:16,668 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2025-03-16 14:04:16,862 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:04:16,863 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:04:16,863 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:04:16,863 INFO L85 PathProgramCache]: Analyzing trace with hash 2027455872, now seen corresponding path program 1 times [2025-03-16 14:04:16,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-16 14:04:16,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1205796518] [2025-03-16 14:04:16,863 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:04:16,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:04:16,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:04:16,865 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) [2025-03-16 14:04:16,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2025-03-16 14:04:16,890 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 52 statements into 1 equivalence classes. [2025-03-16 14:04:16,899 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 52 of 52 statements. [2025-03-16 14:04:16,900 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:04:16,900 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:04:16,900 INFO L256 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-03-16 14:04:16,901 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:04:16,971 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-03-16 14:04:16,971 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 14:04:17,041 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-03-16 14:04:17,041 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-16 14:04:17,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205796518] [2025-03-16 14:04:17,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205796518] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-16 14:04:17,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-16 14:04:17,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12] total 16 [2025-03-16 14:04:17,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481167002] [2025-03-16 14:04:17,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:04:17,042 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-16 14:04:17,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-16 14:04:17,042 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-16 14:04:17,042 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2025-03-16 14:04:17,042 INFO L87 Difference]: Start difference. First operand 216 states and 275 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 6 states have internal predecessors, (35), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2025-03-16 14:04:17,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:04:17,122 INFO L93 Difference]: Finished difference Result 288 states and 366 transitions. [2025-03-16 14:04:17,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-16 14:04:17,124 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 6 states have internal predecessors, (35), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 52 [2025-03-16 14:04:17,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:04:17,125 INFO L225 Difference]: With dead ends: 288 [2025-03-16 14:04:17,125 INFO L226 Difference]: Without dead ends: 249 [2025-03-16 14:04:17,125 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2025-03-16 14:04:17,126 INFO L435 NwaCegarLoop]: 69 mSDtfsCounter, 21 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 14:04:17,126 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 459 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 14:04:17,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2025-03-16 14:04:17,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 236. [2025-03-16 14:04:17,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 173 states have (on average 1.1502890173410405) internal successors, (199), 183 states have internal predecessors, (199), 37 states have call successors, (37), 17 states have call predecessors, (37), 25 states have return successors, (64), 35 states have call predecessors, (64), 34 states have call successors, (64) [2025-03-16 14:04:17,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 300 transitions. [2025-03-16 14:04:17,148 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 300 transitions. Word has length 52 [2025-03-16 14:04:17,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:04:17,148 INFO L471 AbstractCegarLoop]: Abstraction has 236 states and 300 transitions. [2025-03-16 14:04:17,148 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 6 states have internal predecessors, (35), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2025-03-16 14:04:17,149 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 300 transitions. [2025-03-16 14:04:17,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2025-03-16 14:04:17,150 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:04:17,150 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:04:17,156 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2025-03-16 14:04:17,355 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:04:17,355 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:04:17,355 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:04:17,355 INFO L85 PathProgramCache]: Analyzing trace with hash 977120041, now seen corresponding path program 1 times [2025-03-16 14:04:17,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-16 14:04:17,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1160684181] [2025-03-16 14:04:17,355 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:04:17,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:04:17,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:04:17,357 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) [2025-03-16 14:04:17,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2025-03-16 14:04:17,381 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 47 statements into 1 equivalence classes. [2025-03-16 14:04:17,390 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 47 of 47 statements. [2025-03-16 14:04:17,390 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:04:17,390 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:04:17,391 INFO L256 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-03-16 14:04:17,392 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:04:21,433 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-16 14:04:21,433 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 14:04:21,539 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-16 14:04:21,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160684181] [2025-03-16 14:04:21,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160684181] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 14:04:21,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [468375575] [2025-03-16 14:04:21,539 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:04:21,540 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2025-03-16 14:04:21,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2025-03-16 14:04:21,541 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2025-03-16 14:04:21,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2025-03-16 14:04:21,577 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 47 statements into 1 equivalence classes. [2025-03-16 14:04:21,605 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 47 of 47 statements. [2025-03-16 14:04:21,605 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:04:21,605 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:04:21,607 INFO L256 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-16 14:04:21,608 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:04:21,660 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-16 14:04:21,660 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-16 14:04:21,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [468375575] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:04:21,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-16 14:04:21,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 10 [2025-03-16 14:04:21,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065319278] [2025-03-16 14:04:21,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:04:21,660 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-16 14:04:21,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-16 14:04:21,661 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-16 14:04:21,661 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=162, Unknown=2, NotChecked=0, Total=210 [2025-03-16 14:04:21,661 INFO L87 Difference]: Start difference. First operand 236 states and 300 transitions. Second operand has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-16 14:04:23,806 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2025-03-16 14:04:25,760 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.95s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2025-03-16 14:04:28,021 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.26s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2025-03-16 14:04:29,922 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.90s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2025-03-16 14:04:32,175 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.25s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2025-03-16 14:04:36,809 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2025-03-16 14:04:36,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:04:36,946 INFO L93 Difference]: Finished difference Result 265 states and 338 transitions. [2025-03-16 14:04:36,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-16 14:04:36,947 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 47 [2025-03-16 14:04:36,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:04:36,948 INFO L225 Difference]: With dead ends: 265 [2025-03-16 14:04:36,948 INFO L226 Difference]: Without dead ends: 239 [2025-03-16 14:04:36,948 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 88 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=59, Invalid=211, Unknown=2, NotChecked=0, Total=272 [2025-03-16 14:04:36,948 INFO L435 NwaCegarLoop]: 63 mSDtfsCounter, 12 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 1 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.2s IncrementalHoareTripleChecker+Time [2025-03-16 14:04:36,948 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 297 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 63 Invalid, 6 Unknown, 0 Unchecked, 15.2s Time] [2025-03-16 14:04:36,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2025-03-16 14:04:36,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 210. [2025-03-16 14:04:36,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 157 states have (on average 1.1528662420382165) internal successors, (181), 164 states have internal predecessors, (181), 30 states have call successors, (30), 15 states have call predecessors, (30), 22 states have return successors, (57), 30 states have call predecessors, (57), 29 states have call successors, (57) [2025-03-16 14:04:36,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 268 transitions. [2025-03-16 14:04:36,970 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 268 transitions. Word has length 47 [2025-03-16 14:04:36,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:04:36,971 INFO L471 AbstractCegarLoop]: Abstraction has 210 states and 268 transitions. [2025-03-16 14:04:36,971 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-16 14:04:36,971 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 268 transitions. [2025-03-16 14:04:36,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2025-03-16 14:04:36,971 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:04:36,972 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 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] [2025-03-16 14:04:36,974 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (31)] Ended with exit code 0 [2025-03-16 14:04:37,180 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2025-03-16 14:04:37,374 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:04:37,374 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:04:37,375 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:04:37,375 INFO L85 PathProgramCache]: Analyzing trace with hash 1447671969, now seen corresponding path program 1 times [2025-03-16 14:04:37,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-16 14:04:37,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1102800227] [2025-03-16 14:04:37,375 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:04:37,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:04:37,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:04:37,377 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) [2025-03-16 14:04:37,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2025-03-16 14:04:37,405 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 48 statements into 1 equivalence classes. [2025-03-16 14:04:37,411 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 48 of 48 statements. [2025-03-16 14:04:37,411 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:04:37,411 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:04:37,412 INFO L256 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-03-16 14:04:37,413 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:04:37,451 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-16 14:04:37,451 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 14:04:37,519 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-16 14:04:37,519 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-16 14:04:37,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102800227] [2025-03-16 14:04:37,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102800227] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 14:04:37,519 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-16 14:04:37,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2025-03-16 14:04:37,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209797066] [2025-03-16 14:04:37,520 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-16 14:04:37,520 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-16 14:04:37,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-16 14:04:37,520 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-16 14:04:37,520 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2025-03-16 14:04:37,520 INFO L87 Difference]: Start difference. First operand 210 states and 268 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 11 states have internal predecessors, (41), 4 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (9), 6 states have call predecessors, (9), 3 states have call successors, (9) [2025-03-16 14:04:37,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:04:37,599 INFO L93 Difference]: Finished difference Result 237 states and 301 transitions. [2025-03-16 14:04:37,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-16 14:04:37,600 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 11 states have internal predecessors, (41), 4 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (9), 6 states have call predecessors, (9), 3 states have call successors, (9) Word has length 48 [2025-03-16 14:04:37,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:04:37,601 INFO L225 Difference]: With dead ends: 237 [2025-03-16 14:04:37,601 INFO L226 Difference]: Without dead ends: 224 [2025-03-16 14:04:37,601 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2025-03-16 14:04:37,601 INFO L435 NwaCegarLoop]: 72 mSDtfsCounter, 4 mSDsluCounter, 536 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 608 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 14:04:37,602 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 608 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 14:04:37,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2025-03-16 14:04:37,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 213. [2025-03-16 14:04:37,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 159 states have (on average 1.150943396226415) internal successors, (183), 167 states have internal predecessors, (183), 30 states have call successors, (30), 15 states have call predecessors, (30), 23 states have return successors, (60), 30 states have call predecessors, (60), 29 states have call successors, (60) [2025-03-16 14:04:37,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 273 transitions. [2025-03-16 14:04:37,622 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 273 transitions. Word has length 48 [2025-03-16 14:04:37,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:04:37,622 INFO L471 AbstractCegarLoop]: Abstraction has 213 states and 273 transitions. [2025-03-16 14:04:37,622 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 11 states have internal predecessors, (41), 4 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (9), 6 states have call predecessors, (9), 3 states have call successors, (9) [2025-03-16 14:04:37,622 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 273 transitions. [2025-03-16 14:04:37,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2025-03-16 14:04:37,623 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:04:37,623 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 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] [2025-03-16 14:04:37,629 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2025-03-16 14:04:37,823 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 [2025-03-16 14:04:37,824 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:04:37,824 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:04:37,824 INFO L85 PathProgramCache]: Analyzing trace with hash -127929356, now seen corresponding path program 1 times [2025-03-16 14:04:37,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-16 14:04:37,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2024980881] [2025-03-16 14:04:37,824 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:04:37,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:04:37,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:04:37,827 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) [2025-03-16 14:04:37,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2025-03-16 14:04:37,853 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 48 statements into 1 equivalence classes. [2025-03-16 14:04:37,862 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 48 of 48 statements. [2025-03-16 14:04:37,862 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:04:37,862 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:04:37,863 INFO L256 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-16 14:04:37,864 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:04:37,929 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2025-03-16 14:04:37,929 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 14:04:38,049 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2025-03-16 14:04:38,050 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-16 14:04:38,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024980881] [2025-03-16 14:04:38,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024980881] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 14:04:38,050 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-16 14:04:38,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2025-03-16 14:04:38,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204679987] [2025-03-16 14:04:38,050 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-16 14:04:38,050 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-16 14:04:38,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-16 14:04:38,050 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-16 14:04:38,050 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2025-03-16 14:04:38,050 INFO L87 Difference]: Start difference. First operand 213 states and 273 transitions. Second operand has 16 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2025-03-16 14:04:38,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:04:38,221 INFO L93 Difference]: Finished difference Result 255 states and 333 transitions. [2025-03-16 14:04:38,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-16 14:04:38,221 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 48 [2025-03-16 14:04:38,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:04:38,222 INFO L225 Difference]: With dead ends: 255 [2025-03-16 14:04:38,222 INFO L226 Difference]: Without dead ends: 230 [2025-03-16 14:04:38,223 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2025-03-16 14:04:38,223 INFO L435 NwaCegarLoop]: 59 mSDtfsCounter, 18 mSDsluCounter, 547 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 606 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 14:04:38,223 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 606 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 14:04:38,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2025-03-16 14:04:38,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 205. [2025-03-16 14:04:38,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 152 states have (on average 1.1578947368421053) internal successors, (176), 162 states have internal predecessors, (176), 29 states have call successors, (29), 13 states have call predecessors, (29), 23 states have return successors, (60), 29 states have call predecessors, (60), 28 states have call successors, (60) [2025-03-16 14:04:38,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 265 transitions. [2025-03-16 14:04:38,239 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 265 transitions. Word has length 48 [2025-03-16 14:04:38,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:04:38,239 INFO L471 AbstractCegarLoop]: Abstraction has 205 states and 265 transitions. [2025-03-16 14:04:38,239 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2025-03-16 14:04:38,239 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 265 transitions. [2025-03-16 14:04:38,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2025-03-16 14:04:38,240 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:04:38,240 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:04:38,247 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2025-03-16 14:04:38,440 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 [2025-03-16 14:04:38,441 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:04:38,441 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:04:38,441 INFO L85 PathProgramCache]: Analyzing trace with hash 690994277, now seen corresponding path program 1 times [2025-03-16 14:04:38,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-16 14:04:38,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [483831192] [2025-03-16 14:04:38,441 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:04:38,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:04:38,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:04:38,443 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) [2025-03-16 14:04:38,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2025-03-16 14:04:38,469 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 51 statements into 1 equivalence classes. [2025-03-16 14:04:38,477 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 51 of 51 statements. [2025-03-16 14:04:38,477 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:04:38,477 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:04:38,477 INFO L256 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-16 14:04:38,478 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:04:38,510 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2025-03-16 14:04:38,510 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 14:04:38,589 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2025-03-16 14:04:38,590 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-16 14:04:38,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483831192] [2025-03-16 14:04:38,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483831192] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 14:04:38,590 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-16 14:04:38,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2025-03-16 14:04:38,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735012441] [2025-03-16 14:04:38,590 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-16 14:04:38,590 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-03-16 14:04:38,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-16 14:04:38,590 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-03-16 14:04:38,590 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2025-03-16 14:04:38,590 INFO L87 Difference]: Start difference. First operand 205 states and 265 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2025-03-16 14:04:38,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:04:38,713 INFO L93 Difference]: Finished difference Result 244 states and 330 transitions. [2025-03-16 14:04:38,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-16 14:04:38,714 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 51 [2025-03-16 14:04:38,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:04:38,715 INFO L225 Difference]: With dead ends: 244 [2025-03-16 14:04:38,715 INFO L226 Difference]: Without dead ends: 226 [2025-03-16 14:04:38,715 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2025-03-16 14:04:38,715 INFO L435 NwaCegarLoop]: 58 mSDtfsCounter, 60 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 14:04:38,715 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 414 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 14:04:38,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2025-03-16 14:04:38,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 208. [2025-03-16 14:04:38,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 154 states have (on average 1.1493506493506493) internal successors, (177), 165 states have internal predecessors, (177), 29 states have call successors, (29), 13 states have call predecessors, (29), 24 states have return successors, (64), 29 states have call predecessors, (64), 28 states have call successors, (64) [2025-03-16 14:04:38,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 270 transitions. [2025-03-16 14:04:38,733 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 270 transitions. Word has length 51 [2025-03-16 14:04:38,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:04:38,733 INFO L471 AbstractCegarLoop]: Abstraction has 208 states and 270 transitions. [2025-03-16 14:04:38,733 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2025-03-16 14:04:38,733 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 270 transitions. [2025-03-16 14:04:38,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2025-03-16 14:04:38,734 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:04:38,734 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 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] [2025-03-16 14:04:38,740 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2025-03-16 14:04:38,935 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:04:38,935 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:04:38,935 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:04:38,935 INFO L85 PathProgramCache]: Analyzing trace with hash -1377297084, now seen corresponding path program 1 times [2025-03-16 14:04:38,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-16 14:04:38,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [408599895] [2025-03-16 14:04:38,936 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:04:38,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:04:38,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:04:38,937 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 14:04:38,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2025-03-16 14:04:38,963 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 60 statements into 1 equivalence classes. [2025-03-16 14:04:38,973 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 60 of 60 statements. [2025-03-16 14:04:38,973 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:04:38,973 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:04:38,974 INFO L256 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-16 14:04:38,975 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:04:39,057 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-16 14:04:39,057 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 14:04:39,209 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-16 14:04:39,209 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-16 14:04:39,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408599895] [2025-03-16 14:04:39,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408599895] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 14:04:39,209 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-16 14:04:39,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2025-03-16 14:04:39,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504140021] [2025-03-16 14:04:39,209 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-16 14:04:39,209 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-16 14:04:39,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-16 14:04:39,209 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-16 14:04:39,210 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2025-03-16 14:04:39,210 INFO L87 Difference]: Start difference. First operand 208 states and 270 transitions. Second operand has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 16 states have internal predecessors, (52), 7 states have call successors, (10), 2 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 6 states have call successors, (10) [2025-03-16 14:04:39,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:04:39,326 INFO L93 Difference]: Finished difference Result 247 states and 328 transitions. [2025-03-16 14:04:39,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-16 14:04:39,327 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 16 states have internal predecessors, (52), 7 states have call successors, (10), 2 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 6 states have call successors, (10) Word has length 60 [2025-03-16 14:04:39,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:04:39,328 INFO L225 Difference]: With dead ends: 247 [2025-03-16 14:04:39,328 INFO L226 Difference]: Without dead ends: 238 [2025-03-16 14:04:39,328 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2025-03-16 14:04:39,328 INFO L435 NwaCegarLoop]: 79 mSDtfsCounter, 27 mSDsluCounter, 593 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 672 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 14:04:39,328 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 672 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 14:04:39,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2025-03-16 14:04:39,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 223. [2025-03-16 14:04:39,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 164 states have (on average 1.1524390243902438) internal successors, (189), 178 states have internal predecessors, (189), 31 states have call successors, (31), 13 states have call predecessors, (31), 27 states have return successors, (82), 31 states have call predecessors, (82), 30 states have call successors, (82) [2025-03-16 14:04:39,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 302 transitions. [2025-03-16 14:04:39,353 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 302 transitions. Word has length 60 [2025-03-16 14:04:39,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:04:39,354 INFO L471 AbstractCegarLoop]: Abstraction has 223 states and 302 transitions. [2025-03-16 14:04:39,354 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 16 states have internal predecessors, (52), 7 states have call successors, (10), 2 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 6 states have call successors, (10) [2025-03-16 14:04:39,354 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 302 transitions. [2025-03-16 14:04:39,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2025-03-16 14:04:39,355 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:04:39,356 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:04:39,362 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2025-03-16 14:04:39,556 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:04:39,557 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:04:39,557 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:04:39,557 INFO L85 PathProgramCache]: Analyzing trace with hash 1800911222, now seen corresponding path program 1 times [2025-03-16 14:04:39,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-16 14:04:39,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1163763669] [2025-03-16 14:04:39,557 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:04:39,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:04:39,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:04:39,559 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 14:04:39,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2025-03-16 14:04:39,585 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 60 statements into 1 equivalence classes. [2025-03-16 14:04:39,595 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 60 of 60 statements. [2025-03-16 14:04:39,595 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:04:39,595 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:04:39,596 INFO L256 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-16 14:04:39,597 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:04:39,636 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2025-03-16 14:04:39,636 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 14:04:39,717 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2025-03-16 14:04:39,717 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-16 14:04:39,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163763669] [2025-03-16 14:04:39,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163763669] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 14:04:39,717 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-16 14:04:39,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2025-03-16 14:04:39,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697548514] [2025-03-16 14:04:39,717 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-16 14:04:39,718 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-03-16 14:04:39,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-16 14:04:39,718 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-03-16 14:04:39,718 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2025-03-16 14:04:39,718 INFO L87 Difference]: Start difference. First operand 223 states and 302 transitions. Second operand has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 states have internal predecessors, (43), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2025-03-16 14:04:39,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:04:39,823 INFO L93 Difference]: Finished difference Result 241 states and 325 transitions. [2025-03-16 14:04:39,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-16 14:04:39,824 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 states have internal predecessors, (43), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 60 [2025-03-16 14:04:39,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:04:39,825 INFO L225 Difference]: With dead ends: 241 [2025-03-16 14:04:39,825 INFO L226 Difference]: Without dead ends: 223 [2025-03-16 14:04:39,825 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2025-03-16 14:04:39,825 INFO L435 NwaCegarLoop]: 63 mSDtfsCounter, 28 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 14:04:39,825 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 450 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 14:04:39,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2025-03-16 14:04:39,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 208. [2025-03-16 14:04:39,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 154 states have (on average 1.1428571428571428) internal successors, (176), 165 states have internal predecessors, (176), 29 states have call successors, (29), 13 states have call predecessors, (29), 24 states have return successors, (63), 29 states have call predecessors, (63), 28 states have call successors, (63) [2025-03-16 14:04:39,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 268 transitions. [2025-03-16 14:04:39,842 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 268 transitions. Word has length 60 [2025-03-16 14:04:39,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:04:39,842 INFO L471 AbstractCegarLoop]: Abstraction has 208 states and 268 transitions. [2025-03-16 14:04:39,842 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 states have internal predecessors, (43), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2025-03-16 14:04:39,842 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 268 transitions. [2025-03-16 14:04:39,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2025-03-16 14:04:39,843 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:04:39,843 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:04:39,849 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2025-03-16 14:04:40,044 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:04:40,044 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:04:40,044 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:04:40,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1368216065, now seen corresponding path program 1 times [2025-03-16 14:04:40,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-16 14:04:40,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [804823900] [2025-03-16 14:04:40,044 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:04:40,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:04:40,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:04:40,046 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 14:04:40,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2025-03-16 14:04:40,073 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 60 statements into 1 equivalence classes. [2025-03-16 14:04:40,083 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 60 of 60 statements. [2025-03-16 14:04:40,083 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:04:40,083 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:04:40,084 INFO L256 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-03-16 14:04:40,084 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:04:40,157 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2025-03-16 14:04:40,157 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 14:04:40,330 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2025-03-16 14:04:40,331 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-16 14:04:40,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804823900] [2025-03-16 14:04:40,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804823900] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 14:04:40,331 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-16 14:04:40,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2025-03-16 14:04:40,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839930777] [2025-03-16 14:04:40,331 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-16 14:04:40,331 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-03-16 14:04:40,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-16 14:04:40,331 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-03-16 14:04:40,331 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2025-03-16 14:04:40,331 INFO L87 Difference]: Start difference. First operand 208 states and 268 transitions. Second operand has 20 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 18 states have internal predecessors, (50), 6 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2025-03-16 14:04:40,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:04:40,974 INFO L93 Difference]: Finished difference Result 244 states and 320 transitions. [2025-03-16 14:04:40,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-03-16 14:04:40,975 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 18 states have internal predecessors, (50), 6 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) Word has length 60 [2025-03-16 14:04:40,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:04:40,976 INFO L225 Difference]: With dead ends: 244 [2025-03-16 14:04:40,976 INFO L226 Difference]: Without dead ends: 235 [2025-03-16 14:04:40,976 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=171, Invalid=1089, Unknown=0, NotChecked=0, Total=1260 [2025-03-16 14:04:40,976 INFO L435 NwaCegarLoop]: 74 mSDtfsCounter, 111 mSDsluCounter, 890 mSDsCounter, 0 mSdLazyCounter, 588 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 964 SdHoareTripleChecker+Invalid, 618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-03-16 14:04:40,976 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 964 Invalid, 618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 588 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-03-16 14:04:40,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2025-03-16 14:04:40,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 208. [2025-03-16 14:04:40,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 154 states have (on average 1.1428571428571428) internal successors, (176), 165 states have internal predecessors, (176), 29 states have call successors, (29), 13 states have call predecessors, (29), 24 states have return successors, (62), 29 states have call predecessors, (62), 28 states have call successors, (62) [2025-03-16 14:04:40,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 267 transitions. [2025-03-16 14:04:40,997 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 267 transitions. Word has length 60 [2025-03-16 14:04:40,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:04:40,998 INFO L471 AbstractCegarLoop]: Abstraction has 208 states and 267 transitions. [2025-03-16 14:04:40,998 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 18 states have internal predecessors, (50), 6 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2025-03-16 14:04:40,998 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 267 transitions. [2025-03-16 14:04:41,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2025-03-16 14:04:41,000 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:04:41,000 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1] [2025-03-16 14:04:41,007 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2025-03-16 14:04:41,200 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:04:41,201 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:04:41,201 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:04:41,201 INFO L85 PathProgramCache]: Analyzing trace with hash 1215229164, now seen corresponding path program 1 times [2025-03-16 14:04:41,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-16 14:04:41,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1520503613] [2025-03-16 14:04:41,201 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:04:41,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:04:41,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:04:41,203 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 14:04:41,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2025-03-16 14:04:41,229 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 62 statements into 1 equivalence classes. [2025-03-16 14:04:41,239 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 62 of 62 statements. [2025-03-16 14:04:41,239 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:04:41,239 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:04:41,239 INFO L256 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-16 14:04:41,240 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:04:41,278 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-16 14:04:41,278 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 14:04:41,351 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-16 14:04:41,351 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-16 14:04:41,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520503613] [2025-03-16 14:04:41,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520503613] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 14:04:41,351 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-16 14:04:41,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2025-03-16 14:04:41,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786875109] [2025-03-16 14:04:41,352 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-16 14:04:41,352 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-03-16 14:04:41,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-16 14:04:41,352 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-03-16 14:04:41,352 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2025-03-16 14:04:41,352 INFO L87 Difference]: Start difference. First operand 208 states and 267 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2025-03-16 14:04:41,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:04:41,454 INFO L93 Difference]: Finished difference Result 234 states and 308 transitions. [2025-03-16 14:04:41,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-16 14:04:41,454 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 62 [2025-03-16 14:04:41,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:04:41,455 INFO L225 Difference]: With dead ends: 234 [2025-03-16 14:04:41,456 INFO L226 Difference]: Without dead ends: 220 [2025-03-16 14:04:41,456 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2025-03-16 14:04:41,456 INFO L435 NwaCegarLoop]: 60 mSDtfsCounter, 60 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 14:04:41,456 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 372 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 14:04:41,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2025-03-16 14:04:41,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 205. [2025-03-16 14:04:41,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 152 states have (on average 1.138157894736842) internal successors, (173), 162 states have internal predecessors, (173), 29 states have call successors, (29), 13 states have call predecessors, (29), 23 states have return successors, (59), 29 states have call predecessors, (59), 28 states have call successors, (59) [2025-03-16 14:04:41,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 261 transitions. [2025-03-16 14:04:41,473 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 261 transitions. Word has length 62 [2025-03-16 14:04:41,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:04:41,473 INFO L471 AbstractCegarLoop]: Abstraction has 205 states and 261 transitions. [2025-03-16 14:04:41,473 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2025-03-16 14:04:41,473 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 261 transitions. [2025-03-16 14:04:41,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2025-03-16 14:04:41,474 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:04:41,474 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1] [2025-03-16 14:04:41,480 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2025-03-16 14:04:41,675 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:04:41,675 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:04:41,675 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:04:41,675 INFO L85 PathProgramCache]: Analyzing trace with hash -1159346226, now seen corresponding path program 2 times [2025-03-16 14:04:41,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-16 14:04:41,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1061685377] [2025-03-16 14:04:41,675 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 14:04:41,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:04:41,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:04:41,678 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 14:04:41,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2025-03-16 14:04:41,710 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 62 statements into 2 equivalence classes. [2025-03-16 14:04:41,723 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 62 of 62 statements. [2025-03-16 14:04:41,723 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 14:04:41,723 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:04:41,729 INFO L256 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-16 14:04:41,731 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:04:41,776 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-16 14:04:41,776 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 14:04:41,853 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-16 14:04:41,853 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-16 14:04:41,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061685377] [2025-03-16 14:04:41,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061685377] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 14:04:41,853 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-16 14:04:41,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2025-03-16 14:04:41,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997565345] [2025-03-16 14:04:41,853 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-16 14:04:41,853 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-03-16 14:04:41,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-16 14:04:41,854 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-03-16 14:04:41,854 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2025-03-16 14:04:41,854 INFO L87 Difference]: Start difference. First operand 205 states and 261 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2025-03-16 14:04:41,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:04:41,931 INFO L93 Difference]: Finished difference Result 231 states and 302 transitions. [2025-03-16 14:04:41,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-16 14:04:41,932 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 62 [2025-03-16 14:04:41,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:04:41,933 INFO L225 Difference]: With dead ends: 231 [2025-03-16 14:04:41,933 INFO L226 Difference]: Without dead ends: 214 [2025-03-16 14:04:41,933 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2025-03-16 14:04:41,933 INFO L435 NwaCegarLoop]: 61 mSDtfsCounter, 32 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 14:04:41,933 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 323 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 14:04:41,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2025-03-16 14:04:41,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 194. [2025-03-16 14:04:41,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 145 states have (on average 1.1310344827586207) internal successors, (164), 152 states have internal predecessors, (164), 28 states have call successors, (28), 13 states have call predecessors, (28), 20 states have return successors, (53), 28 states have call predecessors, (53), 27 states have call successors, (53) [2025-03-16 14:04:41,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 245 transitions. [2025-03-16 14:04:41,957 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 245 transitions. Word has length 62 [2025-03-16 14:04:41,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:04:41,958 INFO L471 AbstractCegarLoop]: Abstraction has 194 states and 245 transitions. [2025-03-16 14:04:41,958 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2025-03-16 14:04:41,958 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 245 transitions. [2025-03-16 14:04:41,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2025-03-16 14:04:41,959 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:04:41,960 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:04:41,966 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2025-03-16 14:04:42,160 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:04:42,160 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:04:42,160 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:04:42,161 INFO L85 PathProgramCache]: Analyzing trace with hash 1945064658, now seen corresponding path program 1 times [2025-03-16 14:04:42,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-16 14:04:42,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [997710367] [2025-03-16 14:04:42,161 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:04:42,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:04:42,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:04:42,162 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 14:04:42,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2025-03-16 14:04:42,190 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 69 statements into 1 equivalence classes. [2025-03-16 14:04:42,202 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 69 of 69 statements. [2025-03-16 14:04:42,202 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:04:42,202 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:04:42,203 INFO L256 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-16 14:04:42,204 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:04:42,303 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2025-03-16 14:04:42,303 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 14:04:42,438 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2025-03-16 14:04:42,438 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-16 14:04:42,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997710367] [2025-03-16 14:04:42,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997710367] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 14:04:42,438 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-16 14:04:42,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2025-03-16 14:04:42,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407909143] [2025-03-16 14:04:42,439 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-16 14:04:42,439 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-16 14:04:42,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-16 14:04:42,439 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-16 14:04:42,439 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2025-03-16 14:04:42,439 INFO L87 Difference]: Start difference. First operand 194 states and 245 transitions. Second operand has 16 states, 16 states have (on average 3.375) internal successors, (54), 14 states have internal predecessors, (54), 5 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) [2025-03-16 14:04:42,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:04:42,693 INFO L93 Difference]: Finished difference Result 214 states and 265 transitions. [2025-03-16 14:04:42,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-16 14:04:42,694 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 14 states have internal predecessors, (54), 5 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) Word has length 69 [2025-03-16 14:04:42,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:04:42,695 INFO L225 Difference]: With dead ends: 214 [2025-03-16 14:04:42,695 INFO L226 Difference]: Without dead ends: 171 [2025-03-16 14:04:42,695 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 120 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2025-03-16 14:04:42,695 INFO L435 NwaCegarLoop]: 65 mSDtfsCounter, 17 mSDsluCounter, 749 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 814 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-16 14:04:42,695 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 814 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-16 14:04:42,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2025-03-16 14:04:42,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 155. [2025-03-16 14:04:42,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 115 states have (on average 1.1652173913043478) internal successors, (134), 121 states have internal predecessors, (134), 23 states have call successors, (23), 10 states have call predecessors, (23), 16 states have return successors, (41), 23 states have call predecessors, (41), 22 states have call successors, (41) [2025-03-16 14:04:42,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 198 transitions. [2025-03-16 14:04:42,708 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 198 transitions. Word has length 69 [2025-03-16 14:04:42,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:04:42,708 INFO L471 AbstractCegarLoop]: Abstraction has 155 states and 198 transitions. [2025-03-16 14:04:42,708 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 14 states have internal predecessors, (54), 5 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) [2025-03-16 14:04:42,708 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 198 transitions. [2025-03-16 14:04:42,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2025-03-16 14:04:42,709 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:04:42,709 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:04:42,715 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2025-03-16 14:04:42,909 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:04:42,909 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:04:42,910 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:04:42,910 INFO L85 PathProgramCache]: Analyzing trace with hash 997247359, now seen corresponding path program 1 times [2025-03-16 14:04:42,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-16 14:04:42,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1845925036] [2025-03-16 14:04:42,910 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:04:42,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:04:42,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:04:42,912 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 14:04:42,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2025-03-16 14:04:42,941 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 69 statements into 1 equivalence classes. [2025-03-16 14:04:42,962 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 69 of 69 statements. [2025-03-16 14:04:42,962 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:04:42,962 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:04:42,963 INFO L256 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 36 conjuncts are in the unsatisfiable core [2025-03-16 14:04:42,964 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:04:43,314 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2025-03-16 14:04:43,314 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-16 14:04:43,314 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-16 14:04:43,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845925036] [2025-03-16 14:04:43,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845925036] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:04:43,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 14:04:43,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2025-03-16 14:04:43,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022690238] [2025-03-16 14:04:43,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:04:43,315 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-16 14:04:43,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-16 14:04:43,315 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-16 14:04:43,315 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2025-03-16 14:04:43,315 INFO L87 Difference]: Start difference. First operand 155 states and 198 transitions. Second operand has 12 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2025-03-16 14:04:43,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:04:43,534 INFO L93 Difference]: Finished difference Result 171 states and 214 transitions. [2025-03-16 14:04:43,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-16 14:04:43,535 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 69 [2025-03-16 14:04:43,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:04:43,536 INFO L225 Difference]: With dead ends: 171 [2025-03-16 14:04:43,536 INFO L226 Difference]: Without dead ends: 162 [2025-03-16 14:04:43,537 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2025-03-16 14:04:43,537 INFO L435 NwaCegarLoop]: 68 mSDtfsCounter, 6 mSDsluCounter, 599 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 667 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-16 14:04:43,537 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 667 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-16 14:04:43,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2025-03-16 14:04:43,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 155. [2025-03-16 14:04:43,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 115 states have (on average 1.1652173913043478) internal successors, (134), 121 states have internal predecessors, (134), 23 states have call successors, (23), 10 states have call predecessors, (23), 16 states have return successors, (40), 23 states have call predecessors, (40), 22 states have call successors, (40) [2025-03-16 14:04:43,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 197 transitions. [2025-03-16 14:04:43,552 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 197 transitions. Word has length 69 [2025-03-16 14:04:43,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:04:43,552 INFO L471 AbstractCegarLoop]: Abstraction has 155 states and 197 transitions. [2025-03-16 14:04:43,552 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2025-03-16 14:04:43,552 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 197 transitions. [2025-03-16 14:04:43,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2025-03-16 14:04:43,554 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:04:43,554 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:04:43,560 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2025-03-16 14:04:43,754 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:04:43,755 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:04:43,755 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:04:43,755 INFO L85 PathProgramCache]: Analyzing trace with hash -950711939, now seen corresponding path program 1 times [2025-03-16 14:04:43,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-16 14:04:43,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [170493037] [2025-03-16 14:04:43,756 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:04:43,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:04:43,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:04:43,757 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 14:04:43,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2025-03-16 14:04:43,787 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 69 statements into 1 equivalence classes. [2025-03-16 14:04:43,798 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 69 of 69 statements. [2025-03-16 14:04:43,798 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:04:43,799 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:04:43,799 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-03-16 14:04:43,800 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:04:44,420 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2025-03-16 14:04:44,421 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 14:04:45,312 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2025-03-16 14:04:45,312 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-16 14:04:45,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170493037] [2025-03-16 14:04:45,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170493037] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 14:04:45,312 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-16 14:04:45,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2025-03-16 14:04:45,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117947119] [2025-03-16 14:04:45,312 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-16 14:04:45,312 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-03-16 14:04:45,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-16 14:04:45,313 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-03-16 14:04:45,313 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2025-03-16 14:04:45,313 INFO L87 Difference]: Start difference. First operand 155 states and 197 transitions. Second operand has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2025-03-16 14:04:47,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:04:47,256 INFO L93 Difference]: Finished difference Result 194 states and 250 transitions. [2025-03-16 14:04:47,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-16 14:04:47,256 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) Word has length 69 [2025-03-16 14:04:47,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:04:47,257 INFO L225 Difference]: With dead ends: 194 [2025-03-16 14:04:47,257 INFO L226 Difference]: Without dead ends: 185 [2025-03-16 14:04:47,258 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=187, Invalid=1073, Unknown=0, NotChecked=0, Total=1260 [2025-03-16 14:04:47,258 INFO L435 NwaCegarLoop]: 79 mSDtfsCounter, 69 mSDsluCounter, 1056 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 1135 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2025-03-16 14:04:47,258 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 1135 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 449 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2025-03-16 14:04:47,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2025-03-16 14:04:47,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 160. [2025-03-16 14:04:47,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 119 states have (on average 1.1764705882352942) internal successors, (140), 126 states have internal predecessors, (140), 23 states have call successors, (23), 10 states have call predecessors, (23), 17 states have return successors, (44), 23 states have call predecessors, (44), 22 states have call successors, (44) [2025-03-16 14:04:47,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 207 transitions. [2025-03-16 14:04:47,275 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 207 transitions. Word has length 69 [2025-03-16 14:04:47,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:04:47,275 INFO L471 AbstractCegarLoop]: Abstraction has 160 states and 207 transitions. [2025-03-16 14:04:47,275 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2025-03-16 14:04:47,275 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 207 transitions. [2025-03-16 14:04:47,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2025-03-16 14:04:47,275 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:04:47,275 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:04:47,282 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2025-03-16 14:04:47,476 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:04:47,476 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:04:47,476 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:04:47,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1306199068, now seen corresponding path program 1 times [2025-03-16 14:04:47,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-16 14:04:47,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [174853202] [2025-03-16 14:04:47,477 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:04:47,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:04:47,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:04:47,478 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 14:04:47,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2025-03-16 14:04:47,509 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 69 statements into 1 equivalence classes. [2025-03-16 14:04:47,524 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 69 of 69 statements. [2025-03-16 14:04:47,524 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:04:47,524 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:04:47,525 INFO L256 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 25 conjuncts are in the unsatisfiable core [2025-03-16 14:04:47,526 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:04:47,914 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-03-16 14:04:47,914 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 14:04:49,024 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2025-03-16 14:04:49,025 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-16 14:04:49,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174853202] [2025-03-16 14:04:49,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174853202] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 14:04:49,025 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-16 14:04:49,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 28 [2025-03-16 14:04:49,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657542899] [2025-03-16 14:04:49,025 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-16 14:04:49,026 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-03-16 14:04:49,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-16 14:04:49,026 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-03-16 14:04:49,027 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=649, Unknown=0, NotChecked=0, Total=756 [2025-03-16 14:04:49,027 INFO L87 Difference]: Start difference. First operand 160 states and 207 transitions. Second operand has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 28 states have internal predecessors, (59), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2025-03-16 14:04:51,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:04:51,146 INFO L93 Difference]: Finished difference Result 260 states and 342 transitions. [2025-03-16 14:04:51,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2025-03-16 14:04:51,147 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 28 states have internal predecessors, (59), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) Word has length 69 [2025-03-16 14:04:51,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:04:51,148 INFO L225 Difference]: With dead ends: 260 [2025-03-16 14:04:51,148 INFO L226 Difference]: Without dead ends: 240 [2025-03-16 14:04:51,148 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=342, Invalid=2108, Unknown=0, NotChecked=0, Total=2450 [2025-03-16 14:04:51,149 INFO L435 NwaCegarLoop]: 70 mSDtfsCounter, 77 mSDsluCounter, 742 mSDsCounter, 0 mSdLazyCounter, 624 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 812 SdHoareTripleChecker+Invalid, 668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2025-03-16 14:04:51,149 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 812 Invalid, 668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 624 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2025-03-16 14:04:51,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2025-03-16 14:04:51,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 203. [2025-03-16 14:04:51,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 152 states have (on average 1.1776315789473684) internal successors, (179), 160 states have internal predecessors, (179), 30 states have call successors, (30), 12 states have call predecessors, (30), 20 states have return successors, (61), 30 states have call predecessors, (61), 29 states have call successors, (61) [2025-03-16 14:04:51,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 270 transitions. [2025-03-16 14:04:51,171 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 270 transitions. Word has length 69 [2025-03-16 14:04:51,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:04:51,171 INFO L471 AbstractCegarLoop]: Abstraction has 203 states and 270 transitions. [2025-03-16 14:04:51,171 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 28 states have internal predecessors, (59), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2025-03-16 14:04:51,171 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 270 transitions. [2025-03-16 14:04:51,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2025-03-16 14:04:51,171 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:04:51,171 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:04:51,179 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2025-03-16 14:04:51,372 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:04:51,372 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:04:51,372 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:04:51,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1873395522, now seen corresponding path program 2 times [2025-03-16 14:04:51,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-16 14:04:51,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [58430061] [2025-03-16 14:04:51,372 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 14:04:51,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:04:51,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:04:51,374 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 14:04:51,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2025-03-16 14:04:51,405 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 69 statements into 2 equivalence classes. [2025-03-16 14:04:51,422 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 69 of 69 statements. [2025-03-16 14:04:51,422 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 14:04:51,422 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:04:51,423 INFO L256 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 25 conjuncts are in the unsatisfiable core [2025-03-16 14:04:51,424 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:04:51,826 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-03-16 14:04:51,826 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 14:04:52,911 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2025-03-16 14:04:52,911 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-16 14:04:52,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58430061] [2025-03-16 14:04:52,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58430061] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 14:04:52,911 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-16 14:04:52,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 28 [2025-03-16 14:04:52,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755957688] [2025-03-16 14:04:52,911 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-16 14:04:52,911 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-03-16 14:04:52,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-16 14:04:52,912 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-03-16 14:04:52,912 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=651, Unknown=0, NotChecked=0, Total=756 [2025-03-16 14:04:52,912 INFO L87 Difference]: Start difference. First operand 203 states and 270 transitions. Second operand has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 28 states have internal predecessors, (59), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2025-03-16 14:04:54,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:04:54,451 INFO L93 Difference]: Finished difference Result 310 states and 410 transitions. [2025-03-16 14:04:54,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2025-03-16 14:04:54,452 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 28 states have internal predecessors, (59), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) Word has length 69 [2025-03-16 14:04:54,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:04:54,453 INFO L225 Difference]: With dead ends: 310 [2025-03-16 14:04:54,453 INFO L226 Difference]: Without dead ends: 290 [2025-03-16 14:04:54,454 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=268, Invalid=1538, Unknown=0, NotChecked=0, Total=1806 [2025-03-16 14:04:54,455 INFO L435 NwaCegarLoop]: 72 mSDtfsCounter, 88 mSDsluCounter, 710 mSDsCounter, 0 mSdLazyCounter, 603 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 782 SdHoareTripleChecker+Invalid, 672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2025-03-16 14:04:54,455 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 782 Invalid, 672 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 603 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2025-03-16 14:04:54,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2025-03-16 14:04:54,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 251. [2025-03-16 14:04:54,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 189 states have (on average 1.1851851851851851) internal successors, (224), 198 states have internal predecessors, (224), 38 states have call successors, (38), 14 states have call predecessors, (38), 23 states have return successors, (78), 38 states have call predecessors, (78), 37 states have call successors, (78) [2025-03-16 14:04:54,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 340 transitions. [2025-03-16 14:04:54,490 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 340 transitions. Word has length 69 [2025-03-16 14:04:54,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:04:54,491 INFO L471 AbstractCegarLoop]: Abstraction has 251 states and 340 transitions. [2025-03-16 14:04:54,491 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 28 states have internal predecessors, (59), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2025-03-16 14:04:54,491 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 340 transitions. [2025-03-16 14:04:54,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2025-03-16 14:04:54,491 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:04:54,491 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:04:54,498 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2025-03-16 14:04:54,692 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:04:54,692 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:04:54,692 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:04:54,692 INFO L85 PathProgramCache]: Analyzing trace with hash -145714818, now seen corresponding path program 1 times [2025-03-16 14:04:54,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-16 14:04:54,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1740934069] [2025-03-16 14:04:54,692 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:04:54,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:04:54,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:04:54,694 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 14:04:54,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2025-03-16 14:04:54,724 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 71 statements into 1 equivalence classes. [2025-03-16 14:04:54,738 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 71 of 71 statements. [2025-03-16 14:04:54,738 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:04:54,738 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:04:54,740 INFO L256 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-03-16 14:04:54,741 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:04:55,280 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2025-03-16 14:04:55,281 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 14:04:55,579 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-16 14:04:55,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740934069] [2025-03-16 14:04:55,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740934069] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 14:04:55,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [993787126] [2025-03-16 14:04:55,579 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:04:55,579 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2025-03-16 14:04:55,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2025-03-16 14:04:55,581 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2025-03-16 14:04:55,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (46)] Waiting until timeout for monitored process [2025-03-16 14:04:55,619 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 71 statements into 1 equivalence classes. [2025-03-16 14:04:55,634 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 71 of 71 statements. [2025-03-16 14:04:55,634 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:04:55,634 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:04:55,635 INFO L256 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-16 14:04:55,636 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:04:55,782 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2025-03-16 14:04:55,782 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-16 14:04:55,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [993787126] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:04:55,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-16 14:04:55,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [14] total 17 [2025-03-16 14:04:55,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945788096] [2025-03-16 14:04:55,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:04:55,783 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-16 14:04:55,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-16 14:04:55,783 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-16 14:04:55,783 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2025-03-16 14:04:55,783 INFO L87 Difference]: Start difference. First operand 251 states and 340 transitions. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2025-03-16 14:04:55,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:04:55,844 INFO L93 Difference]: Finished difference Result 301 states and 418 transitions. [2025-03-16 14:04:55,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-16 14:04:55,845 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 71 [2025-03-16 14:04:55,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:04:55,846 INFO L225 Difference]: With dead ends: 301 [2025-03-16 14:04:55,846 INFO L226 Difference]: Without dead ends: 272 [2025-03-16 14:04:55,846 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2025-03-16 14:04:55,846 INFO L435 NwaCegarLoop]: 64 mSDtfsCounter, 9 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 239 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 [2025-03-16 14:04:55,846 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 239 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 14:04:55,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2025-03-16 14:04:55,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 251. [2025-03-16 14:04:55,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 187 states have (on average 1.1711229946524064) internal successors, (219), 197 states have internal predecessors, (219), 39 states have call successors, (39), 14 states have call predecessors, (39), 24 states have return successors, (84), 39 states have call predecessors, (84), 38 states have call successors, (84) [2025-03-16 14:04:55,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 342 transitions. [2025-03-16 14:04:55,879 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 342 transitions. Word has length 71 [2025-03-16 14:04:55,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:04:55,880 INFO L471 AbstractCegarLoop]: Abstraction has 251 states and 342 transitions. [2025-03-16 14:04:55,880 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2025-03-16 14:04:55,880 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 342 transitions. [2025-03-16 14:04:55,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2025-03-16 14:04:55,881 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:04:55,881 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:04:55,887 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2025-03-16 14:04:56,083 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (46)] Ended with exit code 0 [2025-03-16 14:04:56,281 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2025-03-16 14:04:56,281 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:04:56,281 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:04:56,282 INFO L85 PathProgramCache]: Analyzing trace with hash 2111196189, now seen corresponding path program 1 times [2025-03-16 14:04:56,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-16 14:04:56,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [475336720] [2025-03-16 14:04:56,282 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:04:56,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:04:56,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:04:56,284 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 14:04:56,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2025-03-16 14:04:56,315 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 71 statements into 1 equivalence classes. [2025-03-16 14:04:56,329 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 71 of 71 statements. [2025-03-16 14:04:56,329 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:04:56,329 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:04:56,330 INFO L256 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 25 conjuncts are in the unsatisfiable core [2025-03-16 14:04:56,331 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:04:56,713 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-03-16 14:04:56,713 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 14:04:57,928 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2025-03-16 14:04:57,928 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-16 14:04:57,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475336720] [2025-03-16 14:04:57,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475336720] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 14:04:57,928 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-16 14:04:57,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 28 [2025-03-16 14:04:57,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237120140] [2025-03-16 14:04:57,928 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-16 14:04:57,929 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-03-16 14:04:57,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-16 14:04:57,929 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-03-16 14:04:57,929 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=623, Unknown=0, NotChecked=0, Total=756 [2025-03-16 14:04:57,929 INFO L87 Difference]: Start difference. First operand 251 states and 342 transitions. Second operand has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2025-03-16 14:04:59,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:04:59,132 INFO L93 Difference]: Finished difference Result 301 states and 400 transitions. [2025-03-16 14:04:59,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2025-03-16 14:04:59,133 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) Word has length 71 [2025-03-16 14:04:59,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:04:59,134 INFO L225 Difference]: With dead ends: 301 [2025-03-16 14:04:59,134 INFO L226 Difference]: Without dead ends: 278 [2025-03-16 14:04:59,135 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=231, Invalid=1029, Unknown=0, NotChecked=0, Total=1260 [2025-03-16 14:04:59,135 INFO L435 NwaCegarLoop]: 78 mSDtfsCounter, 30 mSDsluCounter, 1042 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 1120 SdHoareTripleChecker+Invalid, 572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2025-03-16 14:04:59,136 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 1120 Invalid, 572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 560 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2025-03-16 14:04:59,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2025-03-16 14:04:59,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 253. [2025-03-16 14:04:59,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 189 states have (on average 1.1534391534391535) internal successors, (218), 198 states have internal predecessors, (218), 39 states have call successors, (39), 15 states have call predecessors, (39), 24 states have return successors, (79), 39 states have call predecessors, (79), 38 states have call successors, (79) [2025-03-16 14:04:59,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 336 transitions. [2025-03-16 14:04:59,183 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 336 transitions. Word has length 71 [2025-03-16 14:04:59,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:04:59,183 INFO L471 AbstractCegarLoop]: Abstraction has 253 states and 336 transitions. [2025-03-16 14:04:59,183 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2025-03-16 14:04:59,183 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 336 transitions. [2025-03-16 14:04:59,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2025-03-16 14:04:59,184 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:04:59,184 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:04:59,191 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2025-03-16 14:04:59,384 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:04:59,385 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:04:59,385 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:04:59,385 INFO L85 PathProgramCache]: Analyzing trace with hash 163236891, now seen corresponding path program 1 times [2025-03-16 14:04:59,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-16 14:04:59,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [626164495] [2025-03-16 14:04:59,385 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:04:59,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:04:59,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:04:59,387 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 14:04:59,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2025-03-16 14:04:59,418 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 71 statements into 1 equivalence classes. [2025-03-16 14:04:59,430 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 71 of 71 statements. [2025-03-16 14:04:59,430 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:04:59,430 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:04:59,431 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-03-16 14:04:59,432 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:04:59,451 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2025-03-16 14:04:59,451 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 14:04:59,481 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2025-03-16 14:04:59,481 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-16 14:04:59,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626164495] [2025-03-16 14:04:59,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626164495] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 14:04:59,481 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-16 14:04:59,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2025-03-16 14:04:59,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880940343] [2025-03-16 14:04:59,481 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-16 14:04:59,482 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-16 14:04:59,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-16 14:04:59,482 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-16 14:04:59,482 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-03-16 14:04:59,482 INFO L87 Difference]: Start difference. First operand 253 states and 336 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2025-03-16 14:04:59,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:04:59,532 INFO L93 Difference]: Finished difference Result 266 states and 349 transitions. [2025-03-16 14:04:59,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-16 14:04:59,532 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 71 [2025-03-16 14:04:59,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:04:59,533 INFO L225 Difference]: With dead ends: 266 [2025-03-16 14:04:59,533 INFO L226 Difference]: Without dead ends: 261 [2025-03-16 14:04:59,533 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-03-16 14:04:59,534 INFO L435 NwaCegarLoop]: 67 mSDtfsCounter, 1 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 319 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 [2025-03-16 14:04:59,534 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 319 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 14:04:59,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2025-03-16 14:04:59,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 253. [2025-03-16 14:04:59,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 189 states have (on average 1.1534391534391535) internal successors, (218), 198 states have internal predecessors, (218), 39 states have call successors, (39), 15 states have call predecessors, (39), 24 states have return successors, (79), 39 states have call predecessors, (79), 38 states have call successors, (79) [2025-03-16 14:04:59,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 336 transitions. [2025-03-16 14:04:59,573 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 336 transitions. Word has length 71 [2025-03-16 14:04:59,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:04:59,573 INFO L471 AbstractCegarLoop]: Abstraction has 253 states and 336 transitions. [2025-03-16 14:04:59,573 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2025-03-16 14:04:59,573 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 336 transitions. [2025-03-16 14:04:59,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2025-03-16 14:04:59,574 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:04:59,574 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:04:59,580 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2025-03-16 14:04:59,774 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:04:59,774 INFO L396 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:04:59,775 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:04:59,775 INFO L85 PathProgramCache]: Analyzing trace with hash -2081375105, now seen corresponding path program 2 times [2025-03-16 14:04:59,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-16 14:04:59,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [144123753] [2025-03-16 14:04:59,775 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 14:04:59,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:04:59,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:04:59,777 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 14:04:59,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2025-03-16 14:04:59,809 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 71 statements into 2 equivalence classes. [2025-03-16 14:04:59,826 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 71 of 71 statements. [2025-03-16 14:04:59,826 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 14:04:59,826 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:04:59,827 INFO L256 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 25 conjuncts are in the unsatisfiable core [2025-03-16 14:04:59,828 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:05:00,229 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-03-16 14:05:00,229 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 14:05:01,434 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2025-03-16 14:05:01,434 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-16 14:05:01,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144123753] [2025-03-16 14:05:01,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144123753] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 14:05:01,434 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-16 14:05:01,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 28 [2025-03-16 14:05:01,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479190260] [2025-03-16 14:05:01,434 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-16 14:05:01,434 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-03-16 14:05:01,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-16 14:05:01,435 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-03-16 14:05:01,435 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=629, Unknown=0, NotChecked=0, Total=756 [2025-03-16 14:05:01,435 INFO L87 Difference]: Start difference. First operand 253 states and 336 transitions. Second operand has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2025-03-16 14:05:02,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:05:02,595 INFO L93 Difference]: Finished difference Result 313 states and 407 transitions. [2025-03-16 14:05:02,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-03-16 14:05:02,596 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) Word has length 71 [2025-03-16 14:05:02,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:05:02,597 INFO L225 Difference]: With dead ends: 313 [2025-03-16 14:05:02,597 INFO L226 Difference]: Without dead ends: 299 [2025-03-16 14:05:02,597 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=219, Invalid=1041, Unknown=0, NotChecked=0, Total=1260 [2025-03-16 14:05:02,598 INFO L435 NwaCegarLoop]: 74 mSDtfsCounter, 27 mSDsluCounter, 766 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 840 SdHoareTripleChecker+Invalid, 485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2025-03-16 14:05:02,598 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 840 Invalid, 485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 477 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2025-03-16 14:05:02,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2025-03-16 14:05:02,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 261. [2025-03-16 14:05:02,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 196 states have (on average 1.153061224489796) internal successors, (226), 204 states have internal predecessors, (226), 40 states have call successors, (40), 16 states have call predecessors, (40), 24 states have return successors, (77), 40 states have call predecessors, (77), 39 states have call successors, (77) [2025-03-16 14:05:02,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 343 transitions. [2025-03-16 14:05:02,639 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 343 transitions. Word has length 71 [2025-03-16 14:05:02,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:05:02,641 INFO L471 AbstractCegarLoop]: Abstraction has 261 states and 343 transitions. [2025-03-16 14:05:02,641 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2025-03-16 14:05:02,641 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 343 transitions. [2025-03-16 14:05:02,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2025-03-16 14:05:02,642 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:05:02,642 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:05:02,649 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2025-03-16 14:05:02,842 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:05:02,842 INFO L396 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:05:02,843 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:05:02,843 INFO L85 PathProgramCache]: Analyzing trace with hash -90578167, now seen corresponding path program 1 times [2025-03-16 14:05:02,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-16 14:05:02,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [515323758] [2025-03-16 14:05:02,843 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:05:02,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:05:02,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:05:02,845 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 14:05:02,845 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2025-03-16 14:05:02,878 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 74 statements into 1 equivalence classes. [2025-03-16 14:05:02,898 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 74 of 74 statements. [2025-03-16 14:05:02,899 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:05:02,899 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:05:02,900 INFO L256 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-03-16 14:05:02,901 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:05:03,215 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2025-03-16 14:05:03,215 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 14:05:04,154 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-16 14:05:04,155 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-16 14:05:04,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515323758] [2025-03-16 14:05:04,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515323758] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 14:05:04,155 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-16 14:05:04,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 26 [2025-03-16 14:05:04,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709974501] [2025-03-16 14:05:04,155 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-16 14:05:04,155 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-03-16 14:05:04,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-16 14:05:04,155 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-03-16 14:05:04,155 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2025-03-16 14:05:04,156 INFO L87 Difference]: Start difference. First operand 261 states and 343 transitions. Second operand has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 9 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 9 states have call predecessors, (12), 8 states have call successors, (12) [2025-03-16 14:05:05,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:05:05,328 INFO L93 Difference]: Finished difference Result 293 states and 375 transitions. [2025-03-16 14:05:05,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2025-03-16 14:05:05,329 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 9 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 9 states have call predecessors, (12), 8 states have call successors, (12) Word has length 74 [2025-03-16 14:05:05,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:05:05,330 INFO L225 Difference]: With dead ends: 293 [2025-03-16 14:05:05,330 INFO L226 Difference]: Without dead ends: 220 [2025-03-16 14:05:05,331 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=233, Invalid=1249, Unknown=0, NotChecked=0, Total=1482 [2025-03-16 14:05:05,331 INFO L435 NwaCegarLoop]: 73 mSDtfsCounter, 59 mSDsluCounter, 599 mSDsCounter, 0 mSdLazyCounter, 412 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 672 SdHoareTripleChecker+Invalid, 439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2025-03-16 14:05:05,331 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 672 Invalid, 439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 412 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2025-03-16 14:05:05,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2025-03-16 14:05:05,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 195. [2025-03-16 14:05:05,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 146 states have (on average 1.13013698630137) internal successors, (165), 151 states have internal predecessors, (165), 30 states have call successors, (30), 13 states have call predecessors, (30), 18 states have return successors, (57), 30 states have call predecessors, (57), 29 states have call successors, (57) [2025-03-16 14:05:05,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 252 transitions. [2025-03-16 14:05:05,356 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 252 transitions. Word has length 74 [2025-03-16 14:05:05,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:05:05,356 INFO L471 AbstractCegarLoop]: Abstraction has 195 states and 252 transitions. [2025-03-16 14:05:05,356 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 9 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 9 states have call predecessors, (12), 8 states have call successors, (12) [2025-03-16 14:05:05,356 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 252 transitions. [2025-03-16 14:05:05,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2025-03-16 14:05:05,357 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:05:05,357 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:05:05,363 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2025-03-16 14:05:05,557 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:05:05,558 INFO L396 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:05:05,558 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:05:05,558 INFO L85 PathProgramCache]: Analyzing trace with hash 1895729771, now seen corresponding path program 2 times [2025-03-16 14:05:05,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-16 14:05:05,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1775266526] [2025-03-16 14:05:05,558 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 14:05:05,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:05:05,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:05:05,560 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 14:05:05,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2025-03-16 14:05:05,595 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 74 statements into 2 equivalence classes. [2025-03-16 14:05:05,618 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 74 of 74 statements. [2025-03-16 14:05:05,618 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 14:05:05,619 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:05:05,620 INFO L256 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-03-16 14:05:05,621 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:05:05,947 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2025-03-16 14:05:05,947 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 14:05:06,886 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-16 14:05:06,886 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-16 14:05:06,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775266526] [2025-03-16 14:05:06,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775266526] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 14:05:06,887 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-16 14:05:06,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 26 [2025-03-16 14:05:06,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264382195] [2025-03-16 14:05:06,887 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-16 14:05:06,887 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-03-16 14:05:06,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-16 14:05:06,887 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-03-16 14:05:06,887 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2025-03-16 14:05:06,887 INFO L87 Difference]: Start difference. First operand 195 states and 252 transitions. Second operand has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 9 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 9 states have call predecessors, (12), 8 states have call successors, (12) [2025-03-16 14:05:07,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:05:07,671 INFO L93 Difference]: Finished difference Result 221 states and 278 transitions. [2025-03-16 14:05:07,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-03-16 14:05:07,672 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 9 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 9 states have call predecessors, (12), 8 states have call successors, (12) Word has length 74 [2025-03-16 14:05:07,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:05:07,673 INFO L225 Difference]: With dead ends: 221 [2025-03-16 14:05:07,673 INFO L226 Difference]: Without dead ends: 170 [2025-03-16 14:05:07,673 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=171, Invalid=885, Unknown=0, NotChecked=0, Total=1056 [2025-03-16 14:05:07,674 INFO L435 NwaCegarLoop]: 63 mSDtfsCounter, 31 mSDsluCounter, 683 mSDsCounter, 0 mSdLazyCounter, 379 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 746 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-03-16 14:05:07,674 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 746 Invalid, 391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 379 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2025-03-16 14:05:07,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2025-03-16 14:05:07,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 154. [2025-03-16 14:05:07,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 114 states have (on average 1.131578947368421) internal successors, (129), 118 states have internal predecessors, (129), 24 states have call successors, (24), 11 states have call predecessors, (24), 15 states have return successors, (48), 24 states have call predecessors, (48), 23 states have call successors, (48) [2025-03-16 14:05:07,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 201 transitions. [2025-03-16 14:05:07,696 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 201 transitions. Word has length 74 [2025-03-16 14:05:07,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:05:07,696 INFO L471 AbstractCegarLoop]: Abstraction has 154 states and 201 transitions. [2025-03-16 14:05:07,696 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 9 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 9 states have call predecessors, (12), 8 states have call successors, (12) [2025-03-16 14:05:07,697 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 201 transitions. [2025-03-16 14:05:07,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2025-03-16 14:05:07,697 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:05:07,697 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:05:07,704 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2025-03-16 14:05:07,898 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:05:07,898 INFO L396 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:05:07,898 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:05:07,899 INFO L85 PathProgramCache]: Analyzing trace with hash 30291454, now seen corresponding path program 1 times [2025-03-16 14:05:07,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-16 14:05:07,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1197974995] [2025-03-16 14:05:07,900 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:05:07,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:05:07,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:05:07,941 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 14:05:07,942 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2025-03-16 14:05:07,973 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 73 statements into 1 equivalence classes. [2025-03-16 14:05:07,985 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 73 of 73 statements. [2025-03-16 14:05:07,985 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:05:07,985 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:05:07,986 INFO L256 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-03-16 14:05:07,987 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:05:08,006 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2025-03-16 14:05:08,006 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-16 14:05:08,006 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-16 14:05:08,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197974995] [2025-03-16 14:05:08,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197974995] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:05:08,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 14:05:08,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-16 14:05:08,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003006733] [2025-03-16 14:05:08,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:05:08,006 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-16 14:05:08,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-16 14:05:08,006 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-16 14:05:08,006 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-03-16 14:05:08,007 INFO L87 Difference]: Start difference. First operand 154 states and 201 transitions. Second operand has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 5 states have internal predecessors, (38), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2025-03-16 14:05:08,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:05:08,038 INFO L93 Difference]: Finished difference Result 168 states and 215 transitions. [2025-03-16 14:05:08,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-16 14:05:08,038 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 5 states have internal predecessors, (38), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 73 [2025-03-16 14:05:08,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:05:08,039 INFO L225 Difference]: With dead ends: 168 [2025-03-16 14:05:08,039 INFO L226 Difference]: Without dead ends: 156 [2025-03-16 14:05:08,039 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-03-16 14:05:08,039 INFO L435 NwaCegarLoop]: 57 mSDtfsCounter, 0 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 14:05:08,040 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 279 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 14:05:08,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2025-03-16 14:05:08,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 154. [2025-03-16 14:05:08,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 115 states have (on average 1.1217391304347826) internal successors, (129), 118 states have internal predecessors, (129), 23 states have call successors, (23), 11 states have call predecessors, (23), 15 states have return successors, (42), 24 states have call predecessors, (42), 22 states have call successors, (42) [2025-03-16 14:05:08,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 194 transitions. [2025-03-16 14:05:08,060 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 194 transitions. Word has length 73 [2025-03-16 14:05:08,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:05:08,060 INFO L471 AbstractCegarLoop]: Abstraction has 154 states and 194 transitions. [2025-03-16 14:05:08,060 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 5 states have internal predecessors, (38), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2025-03-16 14:05:08,060 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 194 transitions. [2025-03-16 14:05:08,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2025-03-16 14:05:08,060 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:05:08,060 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:05:08,067 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2025-03-16 14:05:08,261 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:05:08,261 INFO L396 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:05:08,261 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:05:08,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1892581562, now seen corresponding path program 1 times [2025-03-16 14:05:08,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-16 14:05:08,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [418845026] [2025-03-16 14:05:08,261 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:05:08,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:05:08,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:05:08,263 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 14:05:08,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2025-03-16 14:05:08,296 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 78 statements into 1 equivalence classes. [2025-03-16 14:05:08,309 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 78 of 78 statements. [2025-03-16 14:05:08,309 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:05:08,309 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:05:08,311 INFO L256 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-03-16 14:05:08,312 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:05:08,566 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 26 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-16 14:05:08,566 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 14:05:08,685 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-16 14:05:08,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418845026] [2025-03-16 14:05:08,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418845026] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 14:05:08,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1609062550] [2025-03-16 14:05:08,685 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:05:08,685 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2025-03-16 14:05:08,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2025-03-16 14:05:08,687 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2025-03-16 14:05:08,688 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (54)] Waiting until timeout for monitored process [2025-03-16 14:05:08,729 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 78 statements into 1 equivalence classes. [2025-03-16 14:05:08,768 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 78 of 78 statements. [2025-03-16 14:05:08,768 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:05:08,768 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:05:08,769 INFO L256 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-03-16 14:05:08,770 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:05:08,858 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-03-16 14:05:08,858 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 14:05:08,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1609062550] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 14:05:08,955 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-16 14:05:08,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 15 [2025-03-16 14:05:08,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310195367] [2025-03-16 14:05:08,956 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-16 14:05:08,956 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-03-16 14:05:08,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-16 14:05:08,956 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-03-16 14:05:08,956 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2025-03-16 14:05:08,956 INFO L87 Difference]: Start difference. First operand 154 states and 194 transitions. Second operand has 15 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 6 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9)