./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive-simple/fibo_25-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e2fb8bed 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/recursive-simple/fibo_25-2.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 9030972e60093099261ffd255cd123d40a9b99982e16d5d1c2c77af1369268fd --- Real Ultimate output --- This is Ultimate 0.3.0-?-e2fb8be-m [2025-03-08 05:43:42,712 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-08 05:43:42,759 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-08 05:43:42,762 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-08 05:43:42,762 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-08 05:43:42,784 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-08 05:43:42,786 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-08 05:43:42,786 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-08 05:43:42,786 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-08 05:43:42,786 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-08 05:43:42,786 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-08 05:43:42,786 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-08 05:43:42,787 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-08 05:43:42,787 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-08 05:43:42,787 INFO L153 SettingsManager]: * Use SBE=true [2025-03-08 05:43:42,787 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-08 05:43:42,788 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-08 05:43:42,788 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-08 05:43:42,788 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-08 05:43:42,788 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-08 05:43:42,788 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-08 05:43:42,788 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-08 05:43:42,788 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-08 05:43:42,789 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-08 05:43:42,789 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-08 05:43:42,789 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-08 05:43:42,789 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-08 05:43:42,789 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-08 05:43:42,789 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-08 05:43:42,789 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-08 05:43:42,789 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-08 05:43:42,790 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-08 05:43:42,790 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 05:43:42,790 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-08 05:43:42,790 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-08 05:43:42,790 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-08 05:43:42,790 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-08 05:43:42,790 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-08 05:43:42,790 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-08 05:43:42,790 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-08 05:43:42,790 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-08 05:43:42,790 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-08 05:43:42,790 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-08 05:43:42,791 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 -> 9030972e60093099261ffd255cd123d40a9b99982e16d5d1c2c77af1369268fd [2025-03-08 05:43:43,037 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-08 05:43:43,047 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-08 05:43:43,049 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-08 05:43:43,050 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-08 05:43:43,050 INFO L274 PluginConnector]: CDTParser initialized [2025-03-08 05:43:43,051 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/fibo_25-2.c [2025-03-08 05:43:44,219 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b590deae5/eae3e692118d48d9afcde08f5fde1584/FLAGbd4c51bfc [2025-03-08 05:43:44,389 INFO L384 CDTParser]: Found 1 translation units. [2025-03-08 05:43:44,389 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/fibo_25-2.c [2025-03-08 05:43:44,408 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b590deae5/eae3e692118d48d9afcde08f5fde1584/FLAGbd4c51bfc [2025-03-08 05:43:44,429 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b590deae5/eae3e692118d48d9afcde08f5fde1584 [2025-03-08 05:43:44,431 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-08 05:43:44,434 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-08 05:43:44,436 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-08 05:43:44,436 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-08 05:43:44,439 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-08 05:43:44,440 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 05:43:44" (1/1) ... [2025-03-08 05:43:44,440 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46c121e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:43:44, skipping insertion in model container [2025-03-08 05:43:44,440 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 05:43:44" (1/1) ... [2025-03-08 05:43:44,450 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-08 05:43:44,561 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/recursive-simple/fibo_25-2.c[746,759] [2025-03-08 05:43:44,563 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 05:43:44,571 INFO L200 MainTranslator]: Completed pre-run [2025-03-08 05:43:44,579 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/recursive-simple/fibo_25-2.c[746,759] [2025-03-08 05:43:44,579 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 05:43:44,589 INFO L204 MainTranslator]: Completed translation [2025-03-08 05:43:44,590 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:43:44 WrapperNode [2025-03-08 05:43:44,590 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-08 05:43:44,591 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-08 05:43:44,591 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-08 05:43:44,591 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-08 05:43:44,595 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:43:44" (1/1) ... [2025-03-08 05:43:44,600 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:43:44" (1/1) ... [2025-03-08 05:43:44,608 INFO L138 Inliner]: procedures = 13, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 20 [2025-03-08 05:43:44,609 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-08 05:43:44,609 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-08 05:43:44,609 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-08 05:43:44,609 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-08 05:43:44,613 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:43:44" (1/1) ... [2025-03-08 05:43:44,614 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:43:44" (1/1) ... [2025-03-08 05:43:44,614 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:43:44" (1/1) ... [2025-03-08 05:43:44,620 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]. [2025-03-08 05:43:44,620 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:43:44" (1/1) ... [2025-03-08 05:43:44,620 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:43:44" (1/1) ... [2025-03-08 05:43:44,621 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:43:44" (1/1) ... [2025-03-08 05:43:44,622 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:43:44" (1/1) ... [2025-03-08 05:43:44,622 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:43:44" (1/1) ... [2025-03-08 05:43:44,623 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:43:44" (1/1) ... [2025-03-08 05:43:44,624 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-08 05:43:44,624 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-08 05:43:44,624 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-08 05:43:44,624 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-08 05:43:44,625 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:43:44" (1/1) ... [2025-03-08 05:43:44,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 05:43:44,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:43:44,650 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) [2025-03-08 05:43:44,652 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 [2025-03-08 05:43:44,668 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-08 05:43:44,668 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-08 05:43:44,668 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-08 05:43:44,668 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-08 05:43:44,668 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2025-03-08 05:43:44,668 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2025-03-08 05:43:44,705 INFO L256 CfgBuilder]: Building ICFG [2025-03-08 05:43:44,707 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-08 05:43:44,768 INFO L1307 $ProcedureCfgBuilder]: dead code at ProgramPoint L13: havoc #t~ret4;havoc #t~ret5; [2025-03-08 05:43:44,776 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2025-03-08 05:43:44,776 INFO L307 CfgBuilder]: Performing block encoding [2025-03-08 05:43:44,781 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-08 05:43:44,784 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-08 05:43:44,785 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 05:43:44 BoogieIcfgContainer [2025-03-08 05:43:44,785 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-08 05:43:44,786 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-08 05:43:44,786 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-08 05:43:44,790 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-08 05:43:44,790 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.03 05:43:44" (1/3) ... [2025-03-08 05:43:44,791 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e8b17aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 05:43:44, skipping insertion in model container [2025-03-08 05:43:44,791 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:43:44" (2/3) ... [2025-03-08 05:43:44,791 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e8b17aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 05:43:44, skipping insertion in model container [2025-03-08 05:43:44,791 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 05:43:44" (3/3) ... [2025-03-08 05:43:44,792 INFO L128 eAbstractionObserver]: Analyzing ICFG fibo_25-2.c [2025-03-08 05:43:44,803 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-08 05:43:44,805 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG fibo_25-2.c that has 2 procedures, 20 locations, 1 initial locations, 0 loop locations, and 1 error locations. [2025-03-08 05:43:44,846 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-08 05:43:44,853 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;@66956912, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-08 05:43:44,854 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-08 05:43:44,857 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 15 states have internal predecessors, (18), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-03-08 05:43:44,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2025-03-08 05:43:44,861 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:43:44,861 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:43:44,862 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:43:44,866 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:43:44,866 INFO L85 PathProgramCache]: Analyzing trace with hash 402921910, now seen corresponding path program 1 times [2025-03-08 05:43:44,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:43:44,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731153103] [2025-03-08 05:43:44,874 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:43:44,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:43:44,925 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-03-08 05:43:44,943 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-03-08 05:43:44,944 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:43:44,944 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:43:45,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 05:43:45,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:43:45,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731153103] [2025-03-08 05:43:45,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731153103] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 05:43:45,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 05:43:45,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-08 05:43:45,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513556898] [2025-03-08 05:43:45,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 05:43:45,053 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-08 05:43:45,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:43:45,064 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-08 05:43:45,064 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-08 05:43:45,065 INFO L87 Difference]: Start difference. First operand has 20 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 15 states have internal predecessors, (18), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-08 05:43:45,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:43:45,116 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2025-03-08 05:43:45,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-08 05:43:45,118 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2025-03-08 05:43:45,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:43:45,122 INFO L225 Difference]: With dead ends: 32 [2025-03-08 05:43:45,122 INFO L226 Difference]: Without dead ends: 20 [2025-03-08 05:43:45,124 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-08 05:43:45,125 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 10 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 05:43:45,126 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 51 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 05:43:45,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2025-03-08 05:43:45,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2025-03-08 05:43:45,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 13 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2025-03-08 05:43:45,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2025-03-08 05:43:45,148 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 10 [2025-03-08 05:43:45,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:43:45,148 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2025-03-08 05:43:45,149 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-08 05:43:45,149 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2025-03-08 05:43:45,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2025-03-08 05:43:45,149 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:43:45,149 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:43:45,150 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-08 05:43:45,150 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:43:45,150 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:43:45,150 INFO L85 PathProgramCache]: Analyzing trace with hash -2143228819, now seen corresponding path program 1 times [2025-03-08 05:43:45,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:43:45,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931797675] [2025-03-08 05:43:45,152 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:43:45,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:43:45,158 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-03-08 05:43:45,162 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-03-08 05:43:45,163 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:43:45,163 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:43:45,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 05:43:45,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:43:45,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931797675] [2025-03-08 05:43:45,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931797675] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 05:43:45,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 05:43:45,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-08 05:43:45,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700219128] [2025-03-08 05:43:45,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 05:43:45,211 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-08 05:43:45,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:43:45,212 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-08 05:43:45,212 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-08 05:43:45,213 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-08 05:43:45,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:43:45,253 INFO L93 Difference]: Finished difference Result 24 states and 29 transitions. [2025-03-08 05:43:45,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-08 05:43:45,253 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2025-03-08 05:43:45,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:43:45,254 INFO L225 Difference]: With dead ends: 24 [2025-03-08 05:43:45,254 INFO L226 Difference]: Without dead ends: 20 [2025-03-08 05:43:45,254 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-08 05:43:45,255 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 7 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 34 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 [2025-03-08 05:43:45,255 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 34 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 05:43:45,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2025-03-08 05:43:45,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2025-03-08 05:43:45,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 13 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2025-03-08 05:43:45,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2025-03-08 05:43:45,261 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 11 [2025-03-08 05:43:45,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:43:45,262 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2025-03-08 05:43:45,262 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-08 05:43:45,262 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2025-03-08 05:43:45,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2025-03-08 05:43:45,263 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:43:45,264 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:43:45,264 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-08 05:43:45,264 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:43:45,265 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:43:45,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1857137997, now seen corresponding path program 1 times [2025-03-08 05:43:45,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:43:45,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114267653] [2025-03-08 05:43:45,265 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:43:45,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:43:45,270 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-08 05:43:45,275 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-08 05:43:45,276 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:43:45,276 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:43:45,374 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-08 05:43:45,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:43:45,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114267653] [2025-03-08 05:43:45,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114267653] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:43:45,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672753606] [2025-03-08 05:43:45,376 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:43:45,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:43:45,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:43:45,378 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) [2025-03-08 05:43:45,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-08 05:43:45,402 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-08 05:43:45,415 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-08 05:43:45,415 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:43:45,415 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:43:45,416 INFO L256 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-08 05:43:45,419 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:43:45,489 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-08 05:43:45,489 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:43:45,666 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 05:43:45,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672753606] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:43:45,667 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:43:45,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 11 [2025-03-08 05:43:45,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879159668] [2025-03-08 05:43:45,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:43:45,667 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-03-08 05:43:45,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:43:45,668 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-03-08 05:43:45,668 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2025-03-08 05:43:45,668 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 11 states, 8 states have (on average 3.5) internal successors, (28), 11 states have internal predecessors, (28), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 8 states have call successors, (8) [2025-03-08 05:43:45,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:43:45,734 INFO L93 Difference]: Finished difference Result 35 states and 46 transitions. [2025-03-08 05:43:45,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-08 05:43:45,734 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 8 states have (on average 3.5) internal successors, (28), 11 states have internal predecessors, (28), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 8 states have call successors, (8) Word has length 23 [2025-03-08 05:43:45,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:43:45,735 INFO L225 Difference]: With dead ends: 35 [2025-03-08 05:43:45,735 INFO L226 Difference]: Without dead ends: 20 [2025-03-08 05:43:45,736 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2025-03-08 05:43:45,736 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 9 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 05:43:45,736 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 60 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 05:43:45,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2025-03-08 05:43:45,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2025-03-08 05:43:45,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 15 states have internal predecessors, (15), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2025-03-08 05:43:45,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2025-03-08 05:43:45,740 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 23 [2025-03-08 05:43:45,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:43:45,740 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2025-03-08 05:43:45,740 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 8 states have (on average 3.5) internal successors, (28), 11 states have internal predecessors, (28), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 8 states have call successors, (8) [2025-03-08 05:43:45,740 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2025-03-08 05:43:45,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2025-03-08 05:43:45,741 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:43:45,741 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:43:45,749 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-08 05:43:45,941 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:43:45,942 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:43:45,943 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:43:45,943 INFO L85 PathProgramCache]: Analyzing trace with hash -318077138, now seen corresponding path program 1 times [2025-03-08 05:43:45,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:43:45,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631356791] [2025-03-08 05:43:45,943 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:43:45,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:43:45,949 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-03-08 05:43:45,955 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-03-08 05:43:45,955 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:43:45,955 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:43:46,028 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-08 05:43:46,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:43:46,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631356791] [2025-03-08 05:43:46,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631356791] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:43:46,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782307849] [2025-03-08 05:43:46,030 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:43:46,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:43:46,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:43:46,032 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) [2025-03-08 05:43:46,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-08 05:43:46,054 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-03-08 05:43:46,063 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-03-08 05:43:46,063 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:43:46,063 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:43:46,063 INFO L256 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-08 05:43:46,065 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:43:46,085 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-08 05:43:46,085 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:43:46,254 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 05:43:46,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782307849] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:43:46,255 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:43:46,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 9 [2025-03-08 05:43:46,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592948670] [2025-03-08 05:43:46,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:43:46,256 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-08 05:43:46,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:43:46,256 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-08 05:43:46,256 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2025-03-08 05:43:46,256 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 9 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2025-03-08 05:43:46,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:43:46,333 INFO L93 Difference]: Finished difference Result 29 states and 38 transitions. [2025-03-08 05:43:46,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-08 05:43:46,334 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) Word has length 24 [2025-03-08 05:43:46,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:43:46,336 INFO L225 Difference]: With dead ends: 29 [2025-03-08 05:43:46,336 INFO L226 Difference]: Without dead ends: 25 [2025-03-08 05:43:46,336 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2025-03-08 05:43:46,337 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 21 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 05:43:46,337 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 37 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 05:43:46,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2025-03-08 05:43:46,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2025-03-08 05:43:46,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.125) internal successors, (18), 18 states have internal predecessors, (18), 4 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2025-03-08 05:43:46,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 34 transitions. [2025-03-08 05:43:46,349 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 34 transitions. Word has length 24 [2025-03-08 05:43:46,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:43:46,350 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 34 transitions. [2025-03-08 05:43:46,350 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2025-03-08 05:43:46,350 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 34 transitions. [2025-03-08 05:43:46,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2025-03-08 05:43:46,353 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:43:46,353 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:43:46,365 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-08 05:43:46,553 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2025-03-08 05:43:46,554 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:43:46,554 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:43:46,554 INFO L85 PathProgramCache]: Analyzing trace with hash -896080901, now seen corresponding path program 2 times [2025-03-08 05:43:46,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:43:46,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876743929] [2025-03-08 05:43:46,554 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 05:43:46,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:43:46,560 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 37 statements into 2 equivalence classes. [2025-03-08 05:43:46,571 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 37 of 37 statements. [2025-03-08 05:43:46,571 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 05:43:46,571 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:43:46,691 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 24 proven. 7 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2025-03-08 05:43:46,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:43:46,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876743929] [2025-03-08 05:43:46,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876743929] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:43:46,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450916572] [2025-03-08 05:43:46,692 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 05:43:46,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:43:46,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:43:46,694 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) [2025-03-08 05:43:46,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-08 05:43:46,720 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 37 statements into 2 equivalence classes. [2025-03-08 05:43:46,731 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 37 of 37 statements. [2025-03-08 05:43:46,731 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 05:43:46,731 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:43:46,732 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-08 05:43:46,733 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:43:46,820 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2025-03-08 05:43:46,820 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:43:47,081 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2025-03-08 05:43:47,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450916572] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:43:47,081 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:43:47,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 9] total 18 [2025-03-08 05:43:47,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536124679] [2025-03-08 05:43:47,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:43:47,082 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-08 05:43:47,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:43:47,082 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-08 05:43:47,083 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2025-03-08 05:43:47,083 INFO L87 Difference]: Start difference. First operand 25 states and 34 transitions. Second operand has 18 states, 16 states have (on average 2.8125) internal successors, (45), 18 states have internal predecessors, (45), 10 states have call successors, (12), 1 states have call predecessors, (12), 7 states have return successors, (13), 6 states have call predecessors, (13), 10 states have call successors, (13) [2025-03-08 05:43:47,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:43:47,265 INFO L93 Difference]: Finished difference Result 60 states and 93 transitions. [2025-03-08 05:43:47,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-08 05:43:47,266 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.8125) internal successors, (45), 18 states have internal predecessors, (45), 10 states have call successors, (12), 1 states have call predecessors, (12), 7 states have return successors, (13), 6 states have call predecessors, (13), 10 states have call successors, (13) Word has length 37 [2025-03-08 05:43:47,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:43:47,267 INFO L225 Difference]: With dead ends: 60 [2025-03-08 05:43:47,267 INFO L226 Difference]: Without dead ends: 38 [2025-03-08 05:43:47,268 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 65 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=168, Invalid=482, Unknown=0, NotChecked=0, Total=650 [2025-03-08 05:43:47,269 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 52 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 05:43:47,270 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 95 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 05:43:47,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2025-03-08 05:43:47,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2025-03-08 05:43:47,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 26 states have internal predecessors, (30), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (11), 7 states have call predecessors, (11), 5 states have call successors, (11) [2025-03-08 05:43:47,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2025-03-08 05:43:47,277 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 37 [2025-03-08 05:43:47,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:43:47,278 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2025-03-08 05:43:47,278 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.8125) internal successors, (45), 18 states have internal predecessors, (45), 10 states have call successors, (12), 1 states have call predecessors, (12), 7 states have return successors, (13), 6 states have call predecessors, (13), 10 states have call successors, (13) [2025-03-08 05:43:47,278 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2025-03-08 05:43:47,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2025-03-08 05:43:47,281 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:43:47,281 INFO L218 NwaCegarLoop]: trace histogram [13, 13, 11, 6, 6, 6, 6, 6, 6, 6, 5, 2, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:43:47,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-03-08 05:43:47,485 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:43:47,485 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:43:47,485 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:43:47,485 INFO L85 PathProgramCache]: Analyzing trace with hash 1467785241, now seen corresponding path program 3 times [2025-03-08 05:43:47,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:43:47,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412592041] [2025-03-08 05:43:47,485 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 05:43:47,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:43:47,492 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 93 statements into 12 equivalence classes. [2025-03-08 05:43:47,506 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) and asserted 59 of 93 statements. [2025-03-08 05:43:47,506 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2025-03-08 05:43:47,506 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:43:47,591 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 174 proven. 17 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2025-03-08 05:43:47,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:43:47,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412592041] [2025-03-08 05:43:47,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412592041] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:43:47,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478714842] [2025-03-08 05:43:47,591 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 05:43:47,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:43:47,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:43:47,594 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) [2025-03-08 05:43:47,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-08 05:43:47,619 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 93 statements into 12 equivalence classes. [2025-03-08 05:43:47,635 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) and asserted 59 of 93 statements. [2025-03-08 05:43:47,635 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2025-03-08 05:43:47,635 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:43:47,636 INFO L256 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-08 05:43:47,637 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:43:47,662 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 174 proven. 17 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2025-03-08 05:43:47,663 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:43:47,984 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 174 proven. 18 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2025-03-08 05:43:47,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478714842] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:43:47,985 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:43:47,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 11 [2025-03-08 05:43:47,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404347087] [2025-03-08 05:43:47,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:43:47,985 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-03-08 05:43:47,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:43:47,986 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-03-08 05:43:47,986 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2025-03-08 05:43:47,986 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 4 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (10), 6 states have call predecessors, (10), 4 states have call successors, (10) [2025-03-08 05:43:48,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:43:48,067 INFO L93 Difference]: Finished difference Result 72 states and 93 transitions. [2025-03-08 05:43:48,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-08 05:43:48,067 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 4 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (10), 6 states have call predecessors, (10), 4 states have call successors, (10) Word has length 93 [2025-03-08 05:43:48,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:43:48,068 INFO L225 Difference]: With dead ends: 72 [2025-03-08 05:43:48,068 INFO L226 Difference]: Without dead ends: 40 [2025-03-08 05:43:48,069 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 180 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2025-03-08 05:43:48,069 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 17 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 05:43:48,069 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 84 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 05:43:48,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2025-03-08 05:43:48,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2025-03-08 05:43:48,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 29 states have (on average 1.103448275862069) internal successors, (32), 27 states have internal predecessors, (32), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (10), 7 states have call predecessors, (10), 5 states have call successors, (10) [2025-03-08 05:43:48,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 47 transitions. [2025-03-08 05:43:48,074 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 47 transitions. Word has length 93 [2025-03-08 05:43:48,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:43:48,075 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 47 transitions. [2025-03-08 05:43:48,075 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 4 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (10), 6 states have call predecessors, (10), 4 states have call successors, (10) [2025-03-08 05:43:48,075 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 47 transitions. [2025-03-08 05:43:48,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2025-03-08 05:43:48,077 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:43:48,078 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 7, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:43:48,084 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-03-08 05:43:48,278 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:43:48,278 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:43:48,279 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:43:48,279 INFO L85 PathProgramCache]: Analyzing trace with hash 152396661, now seen corresponding path program 4 times [2025-03-08 05:43:48,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:43:48,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384840503] [2025-03-08 05:43:48,279 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 05:43:48,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:43:48,283 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 65 statements into 2 equivalence classes. [2025-03-08 05:43:48,289 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 65 of 65 statements. [2025-03-08 05:43:48,289 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 05:43:48,289 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:43:48,427 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 17 proven. 96 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2025-03-08 05:43:48,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:43:48,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384840503] [2025-03-08 05:43:48,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384840503] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:43:48,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765622990] [2025-03-08 05:43:48,428 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 05:43:48,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:43:48,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:43:48,430 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) [2025-03-08 05:43:48,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-08 05:43:48,456 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 65 statements into 2 equivalence classes. [2025-03-08 05:43:48,469 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 65 of 65 statements. [2025-03-08 05:43:48,470 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 05:43:48,470 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:43:48,470 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-08 05:43:48,472 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:43:48,524 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 17 proven. 88 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2025-03-08 05:43:48,525 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:43:48,979 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 17 proven. 103 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2025-03-08 05:43:48,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765622990] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:43:48,980 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:43:48,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 11] total 17 [2025-03-08 05:43:48,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290283663] [2025-03-08 05:43:48,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:43:48,980 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-03-08 05:43:48,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:43:48,981 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-03-08 05:43:48,981 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2025-03-08 05:43:48,981 INFO L87 Difference]: Start difference. First operand 40 states and 47 transitions. Second operand has 17 states, 14 states have (on average 3.357142857142857) internal successors, (47), 17 states have internal predecessors, (47), 13 states have call successors, (14), 1 states have call predecessors, (14), 6 states have return successors, (16), 7 states have call predecessors, (16), 13 states have call successors, (16) [2025-03-08 05:43:49,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:43:49,164 INFO L93 Difference]: Finished difference Result 89 states and 122 transitions. [2025-03-08 05:43:49,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-08 05:43:49,165 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 3.357142857142857) internal successors, (47), 17 states have internal predecessors, (47), 13 states have call successors, (14), 1 states have call predecessors, (14), 6 states have return successors, (16), 7 states have call predecessors, (16), 13 states have call successors, (16) Word has length 65 [2025-03-08 05:43:49,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:43:49,168 INFO L225 Difference]: With dead ends: 89 [2025-03-08 05:43:49,168 INFO L226 Difference]: Without dead ends: 85 [2025-03-08 05:43:49,169 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 121 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=324, Unknown=0, NotChecked=0, Total=462 [2025-03-08 05:43:49,169 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 47 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 05:43:49,169 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 97 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 05:43:49,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2025-03-08 05:43:49,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 79. [2025-03-08 05:43:49,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 54 states have (on average 1.1111111111111112) internal successors, (60), 51 states have internal predecessors, (60), 14 states have call successors, (14), 8 states have call predecessors, (14), 10 states have return successors, (34), 19 states have call predecessors, (34), 14 states have call successors, (34) [2025-03-08 05:43:49,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 108 transitions. [2025-03-08 05:43:49,189 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 108 transitions. Word has length 65 [2025-03-08 05:43:49,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:43:49,190 INFO L471 AbstractCegarLoop]: Abstraction has 79 states and 108 transitions. [2025-03-08 05:43:49,190 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 3.357142857142857) internal successors, (47), 17 states have internal predecessors, (47), 13 states have call successors, (14), 1 states have call predecessors, (14), 6 states have return successors, (16), 7 states have call predecessors, (16), 13 states have call successors, (16) [2025-03-08 05:43:49,190 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 108 transitions. [2025-03-08 05:43:49,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2025-03-08 05:43:49,196 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:43:49,196 INFO L218 NwaCegarLoop]: trace histogram [39, 39, 31, 19, 19, 19, 19, 19, 19, 19, 12, 8, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:43:49,202 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-03-08 05:43:49,396 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:43:49,397 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:43:49,397 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:43:49,397 INFO L85 PathProgramCache]: Analyzing trace with hash -1241057303, now seen corresponding path program 5 times [2025-03-08 05:43:49,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:43:49,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620059366] [2025-03-08 05:43:49,397 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 05:43:49,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:43:49,408 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 269 statements into 30 equivalence classes. [2025-03-08 05:43:49,440 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) and asserted 190 of 269 statements. [2025-03-08 05:43:49,441 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2025-03-08 05:43:49,441 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:43:49,837 INFO L134 CoverageAnalysis]: Checked inductivity of 4113 backedges. 409 proven. 906 refuted. 0 times theorem prover too weak. 2798 trivial. 0 not checked. [2025-03-08 05:43:49,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:43:49,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620059366] [2025-03-08 05:43:49,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620059366] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:43:49,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976155019] [2025-03-08 05:43:49,837 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 05:43:49,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:43:49,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:43:49,839 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) [2025-03-08 05:43:49,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-08 05:43:49,887 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 269 statements into 30 equivalence classes. [2025-03-08 05:43:49,953 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) and asserted 190 of 269 statements. [2025-03-08 05:43:49,954 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2025-03-08 05:43:49,954 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:43:49,955 INFO L256 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-03-08 05:43:49,962 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:43:50,043 INFO L134 CoverageAnalysis]: Checked inductivity of 4113 backedges. 2372 proven. 241 refuted. 0 times theorem prover too weak. 1500 trivial. 0 not checked. [2025-03-08 05:43:50,043 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:43:51,192 INFO L134 CoverageAnalysis]: Checked inductivity of 4113 backedges. 413 proven. 1025 refuted. 0 times theorem prover too weak. 2675 trivial. 0 not checked. [2025-03-08 05:43:51,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976155019] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:43:51,192 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:43:51,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 17] total 24 [2025-03-08 05:43:51,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055709026] [2025-03-08 05:43:51,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:43:51,193 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-03-08 05:43:51,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:43:51,194 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-03-08 05:43:51,194 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=413, Unknown=0, NotChecked=0, Total=552 [2025-03-08 05:43:51,194 INFO L87 Difference]: Start difference. First operand 79 states and 108 transitions. Second operand has 24 states, 24 states have (on average 3.2083333333333335) internal successors, (77), 24 states have internal predecessors, (77), 18 states have call successors, (25), 2 states have call predecessors, (25), 9 states have return successors, (31), 13 states have call predecessors, (31), 18 states have call successors, (31) [2025-03-08 05:43:51,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:43:51,428 INFO L93 Difference]: Finished difference Result 185 states and 289 transitions. [2025-03-08 05:43:51,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2025-03-08 05:43:51,429 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.2083333333333335) internal successors, (77), 24 states have internal predecessors, (77), 18 states have call successors, (25), 2 states have call predecessors, (25), 9 states have return successors, (31), 13 states have call predecessors, (31), 18 states have call successors, (31) Word has length 269 [2025-03-08 05:43:51,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:43:51,430 INFO L225 Difference]: With dead ends: 185 [2025-03-08 05:43:51,430 INFO L226 Difference]: Without dead ends: 84 [2025-03-08 05:43:51,432 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 569 GetRequests, 525 SyntacticMatches, 8 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=386, Invalid=1020, Unknown=0, NotChecked=0, Total=1406 [2025-03-08 05:43:51,432 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 72 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 05:43:51,433 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 119 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 05:43:51,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2025-03-08 05:43:51,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 78. [2025-03-08 05:43:51,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 54 states have (on average 1.0555555555555556) internal successors, (57), 52 states have internal predecessors, (57), 13 states have call successors, (13), 8 states have call predecessors, (13), 10 states have return successors, (33), 17 states have call predecessors, (33), 13 states have call successors, (33) [2025-03-08 05:43:51,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 103 transitions. [2025-03-08 05:43:51,440 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 103 transitions. Word has length 269 [2025-03-08 05:43:51,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:43:51,440 INFO L471 AbstractCegarLoop]: Abstraction has 78 states and 103 transitions. [2025-03-08 05:43:51,440 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.2083333333333335) internal successors, (77), 24 states have internal predecessors, (77), 18 states have call successors, (25), 2 states have call predecessors, (25), 9 states have return successors, (31), 13 states have call predecessors, (31), 18 states have call successors, (31) [2025-03-08 05:43:51,441 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 103 transitions. [2025-03-08 05:43:51,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2025-03-08 05:43:51,442 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:43:51,442 INFO L218 NwaCegarLoop]: trace histogram [31, 31, 25, 15, 15, 15, 15, 15, 15, 15, 10, 6, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:43:51,448 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-03-08 05:43:51,643 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:43:51,643 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:43:51,643 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:43:51,643 INFO L85 PathProgramCache]: Analyzing trace with hash -555793953, now seen corresponding path program 6 times [2025-03-08 05:43:51,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:43:51,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675107327] [2025-03-08 05:43:51,643 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 05:43:51,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:43:51,650 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 215 statements into 28 equivalence classes. [2025-03-08 05:43:51,667 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) and asserted 125 of 215 statements. [2025-03-08 05:43:51,668 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2025-03-08 05:43:51,668 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:43:51,799 INFO L134 CoverageAnalysis]: Checked inductivity of 2580 backedges. 241 proven. 445 refuted. 0 times theorem prover too weak. 1894 trivial. 0 not checked. [2025-03-08 05:43:51,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:43:51,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675107327] [2025-03-08 05:43:51,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675107327] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:43:51,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370830434] [2025-03-08 05:43:51,800 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 05:43:51,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:43:51,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:43:51,802 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) [2025-03-08 05:43:51,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-08 05:43:51,845 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 215 statements into 28 equivalence classes. [2025-03-08 05:43:51,873 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) and asserted 125 of 215 statements. [2025-03-08 05:43:51,873 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2025-03-08 05:43:51,873 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:43:51,874 INFO L256 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-08 05:43:51,877 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:43:51,919 INFO L134 CoverageAnalysis]: Checked inductivity of 2580 backedges. 241 proven. 445 refuted. 0 times theorem prover too weak. 1894 trivial. 0 not checked. [2025-03-08 05:43:51,919 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:43:52,667 INFO L134 CoverageAnalysis]: Checked inductivity of 2580 backedges. 243 proven. 467 refuted. 0 times theorem prover too weak. 1870 trivial. 0 not checked. [2025-03-08 05:43:52,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370830434] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:43:52,667 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:43:52,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 13] total 15 [2025-03-08 05:43:52,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298986083] [2025-03-08 05:43:52,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:43:52,668 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-03-08 05:43:52,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:43:52,668 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-03-08 05:43:52,668 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2025-03-08 05:43:52,668 INFO L87 Difference]: Start difference. First operand 78 states and 103 transitions. Second operand has 15 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 15 states have internal predecessors, (46), 10 states have call successors, (14), 1 states have call predecessors, (14), 6 states have return successors, (17), 9 states have call predecessors, (17), 10 states have call successors, (17) [2025-03-08 05:43:52,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:43:52,754 INFO L93 Difference]: Finished difference Result 93 states and 133 transitions. [2025-03-08 05:43:52,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-08 05:43:52,754 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 15 states have internal predecessors, (46), 10 states have call successors, (14), 1 states have call predecessors, (14), 6 states have return successors, (17), 9 states have call predecessors, (17), 10 states have call successors, (17) Word has length 215 [2025-03-08 05:43:52,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:43:52,756 INFO L225 Difference]: With dead ends: 93 [2025-03-08 05:43:52,756 INFO L226 Difference]: Without dead ends: 89 [2025-03-08 05:43:52,756 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 445 GetRequests, 423 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2025-03-08 05:43:52,757 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 17 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 05:43:52,757 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 86 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 05:43:52,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2025-03-08 05:43:52,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 81. [2025-03-08 05:43:52,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 56 states have (on average 1.0535714285714286) internal successors, (59), 54 states have internal predecessors, (59), 13 states have call successors, (13), 8 states have call predecessors, (13), 11 states have return successors, (36), 18 states have call predecessors, (36), 13 states have call successors, (36) [2025-03-08 05:43:52,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 108 transitions. [2025-03-08 05:43:52,772 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 108 transitions. Word has length 215 [2025-03-08 05:43:52,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:43:52,773 INFO L471 AbstractCegarLoop]: Abstraction has 81 states and 108 transitions. [2025-03-08 05:43:52,773 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 15 states have internal predecessors, (46), 10 states have call successors, (14), 1 states have call predecessors, (14), 6 states have return successors, (17), 9 states have call predecessors, (17), 10 states have call successors, (17) [2025-03-08 05:43:52,773 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 108 transitions. [2025-03-08 05:43:52,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2025-03-08 05:43:52,774 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:43:52,775 INFO L218 NwaCegarLoop]: trace histogram [41, 41, 34, 20, 20, 20, 20, 20, 20, 20, 14, 7, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:43:52,781 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-03-08 05:43:52,975 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:43:52,975 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:43:52,976 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:43:52,976 INFO L85 PathProgramCache]: Analyzing trace with hash -2062059334, now seen corresponding path program 7 times [2025-03-08 05:43:52,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:43:52,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405312039] [2025-03-08 05:43:52,976 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 05:43:52,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:43:52,982 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 284 statements into 1 equivalence classes. [2025-03-08 05:43:52,996 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 284 of 284 statements. [2025-03-08 05:43:52,996 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:43:52,996 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:43:53,213 INFO L134 CoverageAnalysis]: Checked inductivity of 4601 backedges. 168 proven. 990 refuted. 0 times theorem prover too weak. 3443 trivial. 0 not checked. [2025-03-08 05:43:53,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:43:53,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405312039] [2025-03-08 05:43:53,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405312039] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:43:53,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729383181] [2025-03-08 05:43:53,213 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 05:43:53,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:43:53,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:43:53,216 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) [2025-03-08 05:43:53,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-08 05:43:53,270 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 284 statements into 1 equivalence classes. [2025-03-08 05:43:53,318 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 284 of 284 statements. [2025-03-08 05:43:53,319 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:43:53,319 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:43:53,321 INFO L256 TraceCheckSpWp]: Trace formula consists of 649 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-08 05:43:53,323 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:43:53,372 INFO L134 CoverageAnalysis]: Checked inductivity of 4601 backedges. 168 proven. 990 refuted. 0 times theorem prover too weak. 3443 trivial. 0 not checked. [2025-03-08 05:43:53,373 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:43:54,485 INFO L134 CoverageAnalysis]: Checked inductivity of 4601 backedges. 168 proven. 1030 refuted. 0 times theorem prover too weak. 3403 trivial. 0 not checked. [2025-03-08 05:43:54,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729383181] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:43:54,486 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:43:54,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 15] total 17 [2025-03-08 05:43:54,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76675365] [2025-03-08 05:43:54,486 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:43:54,486 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-03-08 05:43:54,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:43:54,487 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-03-08 05:43:54,487 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2025-03-08 05:43:54,487 INFO L87 Difference]: Start difference. First operand 81 states and 108 transitions. Second operand has 17 states, 15 states have (on average 3.466666666666667) internal successors, (52), 17 states have internal predecessors, (52), 14 states have call successors, (15), 1 states have call predecessors, (15), 7 states have return successors, (19), 7 states have call predecessors, (19), 14 states have call successors, (19) [2025-03-08 05:43:54,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:43:54,582 INFO L93 Difference]: Finished difference Result 95 states and 144 transitions. [2025-03-08 05:43:54,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-08 05:43:54,583 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 3.466666666666667) internal successors, (52), 17 states have internal predecessors, (52), 14 states have call successors, (15), 1 states have call predecessors, (15), 7 states have return successors, (19), 7 states have call predecessors, (19), 14 states have call successors, (19) Word has length 284 [2025-03-08 05:43:54,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:43:54,584 INFO L225 Difference]: With dead ends: 95 [2025-03-08 05:43:54,586 INFO L226 Difference]: Without dead ends: 91 [2025-03-08 05:43:54,586 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 586 GetRequests, 560 SyntacticMatches, 6 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=144, Invalid=318, Unknown=0, NotChecked=0, Total=462 [2025-03-08 05:43:54,586 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 30 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 05:43:54,587 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 76 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 05:43:54,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2025-03-08 05:43:54,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 83. [2025-03-08 05:43:54,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 57 states have (on average 1.0526315789473684) internal successors, (60), 55 states have internal predecessors, (60), 14 states have call successors, (14), 8 states have call predecessors, (14), 11 states have return successors, (43), 19 states have call predecessors, (43), 14 states have call successors, (43) [2025-03-08 05:43:54,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 117 transitions. [2025-03-08 05:43:54,600 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 117 transitions. Word has length 284 [2025-03-08 05:43:54,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:43:54,601 INFO L471 AbstractCegarLoop]: Abstraction has 83 states and 117 transitions. [2025-03-08 05:43:54,601 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 3.466666666666667) internal successors, (52), 17 states have internal predecessors, (52), 14 states have call successors, (15), 1 states have call predecessors, (15), 7 states have return successors, (19), 7 states have call predecessors, (19), 14 states have call successors, (19) [2025-03-08 05:43:54,602 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 117 transitions. [2025-03-08 05:43:54,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2025-03-08 05:43:54,604 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:43:54,604 INFO L218 NwaCegarLoop]: trace histogram [45, 45, 36, 22, 22, 22, 22, 22, 22, 22, 14, 9, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:43:54,610 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2025-03-08 05:43:54,808 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2025-03-08 05:43:54,808 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:43:54,808 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:43:54,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1474401376, now seen corresponding path program 8 times [2025-03-08 05:43:54,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:43:54,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702550870] [2025-03-08 05:43:54,809 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 05:43:54,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:43:54,816 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 310 statements into 2 equivalence classes. [2025-03-08 05:43:54,837 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 310 of 310 statements. [2025-03-08 05:43:54,841 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 05:43:54,841 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:43:55,064 INFO L134 CoverageAnalysis]: Checked inductivity of 5514 backedges. 213 proven. 1259 refuted. 0 times theorem prover too weak. 4042 trivial. 0 not checked. [2025-03-08 05:43:55,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:43:55,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702550870] [2025-03-08 05:43:55,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702550870] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:43:55,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762519933] [2025-03-08 05:43:55,065 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 05:43:55,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:43:55,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:43:55,067 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) [2025-03-08 05:43:55,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-08 05:43:55,145 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 310 statements into 2 equivalence classes. [2025-03-08 05:43:55,197 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 310 of 310 statements. [2025-03-08 05:43:55,197 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 05:43:55,197 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:43:55,199 INFO L256 TraceCheckSpWp]: Trace formula consists of 707 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-03-08 05:43:55,202 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:43:55,262 INFO L134 CoverageAnalysis]: Checked inductivity of 5514 backedges. 213 proven. 1259 refuted. 0 times theorem prover too weak. 4042 trivial. 0 not checked. [2025-03-08 05:43:55,262 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:43:56,677 INFO L134 CoverageAnalysis]: Checked inductivity of 5514 backedges. 213 proven. 1316 refuted. 0 times theorem prover too weak. 3985 trivial. 0 not checked. [2025-03-08 05:43:56,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762519933] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:43:56,678 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:43:56,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 17] total 19 [2025-03-08 05:43:56,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713092153] [2025-03-08 05:43:56,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:43:56,679 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-03-08 05:43:56,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:43:56,679 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-03-08 05:43:56,679 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2025-03-08 05:43:56,679 INFO L87 Difference]: Start difference. First operand 83 states and 117 transitions. Second operand has 19 states, 17 states have (on average 3.411764705882353) internal successors, (58), 19 states have internal predecessors, (58), 16 states have call successors, (17), 1 states have call predecessors, (17), 8 states have return successors, (22), 8 states have call predecessors, (22), 16 states have call successors, (22) [2025-03-08 05:43:56,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:43:56,798 INFO L93 Difference]: Finished difference Result 92 states and 137 transitions. [2025-03-08 05:43:56,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-08 05:43:56,799 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 3.411764705882353) internal successors, (58), 19 states have internal predecessors, (58), 16 states have call successors, (17), 1 states have call predecessors, (17), 8 states have return successors, (22), 8 states have call predecessors, (22), 16 states have call successors, (22) Word has length 310 [2025-03-08 05:43:56,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:43:56,801 INFO L225 Difference]: With dead ends: 92 [2025-03-08 05:43:56,801 INFO L226 Difference]: Without dead ends: 88 [2025-03-08 05:43:56,802 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 641 GetRequests, 611 SyntacticMatches, 7 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=188, Invalid=412, Unknown=0, NotChecked=0, Total=600 [2025-03-08 05:43:56,802 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 36 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 05:43:56,802 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 89 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 05:43:56,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2025-03-08 05:43:56,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2025-03-08 05:43:56,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 60 states have (on average 1.05) internal successors, (63), 58 states have internal predecessors, (63), 15 states have call successors, (15), 8 states have call predecessors, (15), 12 states have return successors, (55), 21 states have call predecessors, (55), 15 states have call successors, (55) [2025-03-08 05:43:56,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 133 transitions. [2025-03-08 05:43:56,811 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 133 transitions. Word has length 310 [2025-03-08 05:43:56,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:43:56,813 INFO L471 AbstractCegarLoop]: Abstraction has 88 states and 133 transitions. [2025-03-08 05:43:56,813 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 3.411764705882353) internal successors, (58), 19 states have internal predecessors, (58), 16 states have call successors, (17), 1 states have call predecessors, (17), 8 states have return successors, (22), 8 states have call predecessors, (22), 16 states have call successors, (22) [2025-03-08 05:43:56,813 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 133 transitions. [2025-03-08 05:43:56,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 584 [2025-03-08 05:43:56,818 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:43:56,819 INFO L218 NwaCegarLoop]: trace histogram [85, 85, 69, 42, 42, 42, 42, 42, 42, 42, 27, 16, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:43:56,825 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-03-08 05:43:57,022 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:43:57,022 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:43:57,022 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:43:57,023 INFO L85 PathProgramCache]: Analyzing trace with hash -60838961, now seen corresponding path program 9 times [2025-03-08 05:43:57,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:43:57,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258940649] [2025-03-08 05:43:57,023 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 05:43:57,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:43:57,035 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 583 statements into 78 equivalence classes. [2025-03-08 05:43:57,064 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 32 check-sat command(s) and asserted 245 of 583 statements. [2025-03-08 05:43:57,064 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 32 check-sat command(s) [2025-03-08 05:43:57,067 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:43:57,288 INFO L134 CoverageAnalysis]: Checked inductivity of 20070 backedges. 469 proven. 2966 refuted. 0 times theorem prover too weak. 16635 trivial. 0 not checked. [2025-03-08 05:43:57,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:43:57,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258940649] [2025-03-08 05:43:57,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258940649] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:43:57,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423472734] [2025-03-08 05:43:57,288 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 05:43:57,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:43:57,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:43:57,290 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) [2025-03-08 05:43:57,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-08 05:43:57,402 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 583 statements into 78 equivalence classes. [2025-03-08 05:43:57,461 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 32 check-sat command(s) and asserted 245 of 583 statements. [2025-03-08 05:43:57,461 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 32 check-sat command(s) [2025-03-08 05:43:57,461 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:43:57,463 INFO L256 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-03-08 05:43:57,468 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:43:57,546 INFO L134 CoverageAnalysis]: Checked inductivity of 20070 backedges. 469 proven. 2966 refuted. 0 times theorem prover too weak. 16635 trivial. 0 not checked. [2025-03-08 05:43:57,546 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:43:59,987 INFO L134 CoverageAnalysis]: Checked inductivity of 20070 backedges. 469 proven. 3043 refuted. 0 times theorem prover too weak. 16558 trivial. 0 not checked. [2025-03-08 05:43:59,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423472734] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:43:59,988 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:43:59,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 19] total 21 [2025-03-08 05:43:59,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929130466] [2025-03-08 05:43:59,988 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:43:59,989 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-03-08 05:43:59,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:43:59,989 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-03-08 05:43:59,989 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2025-03-08 05:43:59,990 INFO L87 Difference]: Start difference. First operand 88 states and 133 transitions. Second operand has 21 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 21 states have internal predecessors, (64), 18 states have call successors, (19), 1 states have call predecessors, (19), 9 states have return successors, (25), 9 states have call predecessors, (25), 18 states have call successors, (25) [2025-03-08 05:44:00,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:44:00,177 INFO L93 Difference]: Finished difference Result 97 states and 155 transitions. [2025-03-08 05:44:00,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-08 05:44:00,178 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 21 states have internal predecessors, (64), 18 states have call successors, (19), 1 states have call predecessors, (19), 9 states have return successors, (25), 9 states have call predecessors, (25), 18 states have call successors, (25) Word has length 583 [2025-03-08 05:44:00,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:44:00,180 INFO L225 Difference]: With dead ends: 97 [2025-03-08 05:44:00,180 INFO L226 Difference]: Without dead ends: 93 [2025-03-08 05:44:00,180 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1190 GetRequests, 1156 SyntacticMatches, 8 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=238, Invalid=518, Unknown=0, NotChecked=0, Total=756 [2025-03-08 05:44:00,180 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 120 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 05:44:00,181 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 102 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 05:44:00,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2025-03-08 05:44:00,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2025-03-08 05:44:00,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 63 states have (on average 1.0476190476190477) internal successors, (66), 61 states have internal predecessors, (66), 16 states have call successors, (16), 8 states have call predecessors, (16), 13 states have return successors, (69), 23 states have call predecessors, (69), 16 states have call successors, (69) [2025-03-08 05:44:00,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 151 transitions. [2025-03-08 05:44:00,196 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 151 transitions. Word has length 583 [2025-03-08 05:44:00,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:44:00,196 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 151 transitions. [2025-03-08 05:44:00,197 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 21 states have internal predecessors, (64), 18 states have call successors, (19), 1 states have call predecessors, (19), 9 states have return successors, (25), 9 states have call predecessors, (25), 18 states have call successors, (25) [2025-03-08 05:44:00,197 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 151 transitions. [2025-03-08 05:44:00,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 965 [2025-03-08 05:44:00,203 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:44:00,203 INFO L218 NwaCegarLoop]: trace histogram [141, 141, 114, 70, 70, 70, 70, 70, 70, 70, 44, 27, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:44:00,210 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-03-08 05:44:00,407 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,SelfDestructingSolverStorable11 [2025-03-08 05:44:00,407 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:44:00,407 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:44:00,407 INFO L85 PathProgramCache]: Analyzing trace with hash -1772432010, now seen corresponding path program 10 times [2025-03-08 05:44:00,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:44:00,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448011064] [2025-03-08 05:44:00,408 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 05:44:00,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:44:00,423 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 964 statements into 2 equivalence classes. [2025-03-08 05:44:00,506 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 820 of 964 statements. [2025-03-08 05:44:00,506 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-08 05:44:00,506 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:44:01,119 INFO L134 CoverageAnalysis]: Checked inductivity of 55581 backedges. 1293 proven. 6424 refuted. 0 times theorem prover too weak. 47864 trivial. 0 not checked. [2025-03-08 05:44:01,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:44:01,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448011064] [2025-03-08 05:44:01,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448011064] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:44:01,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264664566] [2025-03-08 05:44:01,120 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 05:44:01,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:44:01,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:44:01,122 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) [2025-03-08 05:44:01,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-08 05:44:01,287 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 964 statements into 2 equivalence classes. [2025-03-08 05:44:01,452 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 820 of 964 statements. [2025-03-08 05:44:01,452 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-08 05:44:01,452 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:44:01,457 INFO L256 TraceCheckSpWp]: Trace formula consists of 1713 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-03-08 05:44:01,465 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:44:01,577 INFO L134 CoverageAnalysis]: Checked inductivity of 55581 backedges. 20187 proven. 843 refuted. 0 times theorem prover too weak. 34551 trivial. 0 not checked. [2025-03-08 05:44:01,577 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:44:04,957 INFO L134 CoverageAnalysis]: Checked inductivity of 55581 backedges. 1383 proven. 7581 refuted. 0 times theorem prover too weak. 46617 trivial. 0 not checked. [2025-03-08 05:44:04,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264664566] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:44:04,958 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:44:04,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 23] total 28 [2025-03-08 05:44:04,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735489355] [2025-03-08 05:44:04,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:44:04,959 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-03-08 05:44:04,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:44:04,959 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-03-08 05:44:04,959 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=622, Unknown=0, NotChecked=0, Total=756 [2025-03-08 05:44:04,960 INFO L87 Difference]: Start difference. First operand 93 states and 151 transitions. Second operand has 28 states, 28 states have (on average 3.25) internal successors, (91), 28 states have internal predecessors, (91), 22 states have call successors, (28), 2 states have call predecessors, (28), 12 states have return successors, (37), 13 states have call predecessors, (37), 22 states have call successors, (37) [2025-03-08 05:44:05,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:44:05,268 INFO L93 Difference]: Finished difference Result 193 states and 378 transitions. [2025-03-08 05:44:05,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2025-03-08 05:44:05,268 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.25) internal successors, (91), 28 states have internal predecessors, (91), 22 states have call successors, (28), 2 states have call predecessors, (28), 12 states have return successors, (37), 13 states have call predecessors, (37), 22 states have call successors, (37) Word has length 964 [2025-03-08 05:44:05,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:44:05,270 INFO L225 Difference]: With dead ends: 193 [2025-03-08 05:44:05,270 INFO L226 Difference]: Without dead ends: 103 [2025-03-08 05:44:05,271 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1968 GetRequests, 1910 SyntacticMatches, 11 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=604, Invalid=1748, Unknown=0, NotChecked=0, Total=2352 [2025-03-08 05:44:05,271 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 127 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 05:44:05,271 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 140 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 05:44:05,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2025-03-08 05:44:05,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 86. [2025-03-08 05:44:05,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 60 states have (on average 1.0333333333333334) internal successors, (62), 58 states have internal predecessors, (62), 15 states have call successors, (15), 10 states have call predecessors, (15), 10 states have return successors, (51), 17 states have call predecessors, (51), 15 states have call successors, (51) [2025-03-08 05:44:05,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 128 transitions. [2025-03-08 05:44:05,282 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 128 transitions. Word has length 964 [2025-03-08 05:44:05,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:44:05,283 INFO L471 AbstractCegarLoop]: Abstraction has 86 states and 128 transitions. [2025-03-08 05:44:05,283 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.25) internal successors, (91), 28 states have internal predecessors, (91), 22 states have call successors, (28), 2 states have call predecessors, (28), 12 states have return successors, (37), 13 states have call predecessors, (37), 22 states have call successors, (37) [2025-03-08 05:44:05,283 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 128 transitions. [2025-03-08 05:44:05,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1060 [2025-03-08 05:44:05,288 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:44:05,288 INFO L218 NwaCegarLoop]: trace histogram [155, 155, 125, 77, 77, 77, 77, 77, 77, 77, 48, 30, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:44:05,296 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2025-03-08 05:44:05,493 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,SelfDestructingSolverStorable12 [2025-03-08 05:44:05,493 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:44:05,493 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:44:05,494 INFO L85 PathProgramCache]: Analyzing trace with hash -1898637249, now seen corresponding path program 11 times [2025-03-08 05:44:05,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:44:05,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178521105] [2025-03-08 05:44:05,494 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 05:44:05,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:44:05,512 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 1059 statements into 126 equivalence classes. [2025-03-08 05:44:05,615 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 64 check-sat command(s) and asserted 513 of 1059 statements. [2025-03-08 05:44:05,615 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 64 check-sat command(s) [2025-03-08 05:44:05,615 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:44:06,159 INFO L134 CoverageAnalysis]: Checked inductivity of 67194 backedges. 5023 proven. 5215 refuted. 0 times theorem prover too weak. 56956 trivial. 0 not checked. [2025-03-08 05:44:06,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:44:06,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178521105] [2025-03-08 05:44:06,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178521105] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:44:06,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537564166] [2025-03-08 05:44:06,160 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 05:44:06,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:44:06,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:44:06,162 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) [2025-03-08 05:44:06,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-08 05:44:06,320 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 1059 statements into 126 equivalence classes. [2025-03-08 05:44:06,472 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 64 check-sat command(s) and asserted 513 of 1059 statements. [2025-03-08 05:44:06,472 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 64 check-sat command(s) [2025-03-08 05:44:06,472 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:44:06,476 INFO L256 TraceCheckSpWp]: Trace formula consists of 1143 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-03-08 05:44:06,484 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:44:06,583 INFO L134 CoverageAnalysis]: Checked inductivity of 67194 backedges. 34209 proven. 1768 refuted. 0 times theorem prover too weak. 31217 trivial. 0 not checked. [2025-03-08 05:44:06,583 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:44:10,276 INFO L134 CoverageAnalysis]: Checked inductivity of 67194 backedges. 4913 proven. 5212 refuted. 0 times theorem prover too weak. 57069 trivial. 0 not checked. [2025-03-08 05:44:10,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537564166] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:44:10,277 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:44:10,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 16, 25] total 35 [2025-03-08 05:44:10,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099645379] [2025-03-08 05:44:10,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:44:10,278 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2025-03-08 05:44:10,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:44:10,278 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2025-03-08 05:44:10,279 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=960, Unknown=0, NotChecked=0, Total=1190 [2025-03-08 05:44:10,279 INFO L87 Difference]: Start difference. First operand 86 states and 128 transitions. Second operand has 35 states, 35 states have (on average 3.057142857142857) internal successors, (107), 35 states have internal predecessors, (107), 26 states have call successors, (34), 2 states have call predecessors, (34), 15 states have return successors, (46), 19 states have call predecessors, (46), 26 states have call successors, (46) [2025-03-08 05:44:10,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:44:10,634 INFO L93 Difference]: Finished difference Result 195 states and 353 transitions. [2025-03-08 05:44:10,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2025-03-08 05:44:10,634 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.057142857142857) internal successors, (107), 35 states have internal predecessors, (107), 26 states have call successors, (34), 2 states have call predecessors, (34), 15 states have return successors, (46), 19 states have call predecessors, (46), 26 states have call successors, (46) Word has length 1059 [2025-03-08 05:44:10,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:44:10,636 INFO L225 Difference]: With dead ends: 195 [2025-03-08 05:44:10,636 INFO L226 Difference]: Without dead ends: 112 [2025-03-08 05:44:10,637 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2169 GetRequests, 2100 SyntacticMatches, 12 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1071 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=833, Invalid=2589, Unknown=0, NotChecked=0, Total=3422 [2025-03-08 05:44:10,638 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 156 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-08 05:44:10,638 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 171 Invalid, 481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-08 05:44:10,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2025-03-08 05:44:10,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 98. [2025-03-08 05:44:10,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 69 states have (on average 1.0289855072463767) internal successors, (71), 67 states have internal predecessors, (71), 18 states have call successors, (18), 13 states have call predecessors, (18), 10 states have return successors, (53), 17 states have call predecessors, (53), 18 states have call successors, (53) [2025-03-08 05:44:10,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 142 transitions. [2025-03-08 05:44:10,648 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 142 transitions. Word has length 1059 [2025-03-08 05:44:10,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:44:10,648 INFO L471 AbstractCegarLoop]: Abstraction has 98 states and 142 transitions. [2025-03-08 05:44:10,649 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.057142857142857) internal successors, (107), 35 states have internal predecessors, (107), 26 states have call successors, (34), 2 states have call predecessors, (34), 15 states have return successors, (46), 19 states have call predecessors, (46), 26 states have call successors, (46) [2025-03-08 05:44:10,649 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 142 transitions. [2025-03-08 05:44:10,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 815 [2025-03-08 05:44:10,652 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:44:10,652 INFO L218 NwaCegarLoop]: trace histogram [119, 119, 96, 59, 59, 59, 59, 59, 59, 59, 37, 23, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:44:10,660 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2025-03-08 05:44:10,856 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,SelfDestructingSolverStorable13 [2025-03-08 05:44:10,856 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:44:10,856 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:44:10,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1402662446, now seen corresponding path program 12 times [2025-03-08 05:44:10,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:44:10,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306762162] [2025-03-08 05:44:10,857 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 05:44:10,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:44:10,874 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 814 statements into 93 equivalence classes. [2025-03-08 05:44:10,900 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) and asserted 239 of 814 statements. [2025-03-08 05:44:10,901 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2025-03-08 05:44:10,901 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:44:11,078 INFO L134 CoverageAnalysis]: Checked inductivity of 39488 backedges. 1358 proven. 3585 refuted. 0 times theorem prover too weak. 34545 trivial. 0 not checked. [2025-03-08 05:44:11,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:44:11,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306762162] [2025-03-08 05:44:11,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306762162] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:44:11,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263960052] [2025-03-08 05:44:11,079 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 05:44:11,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:44:11,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:44:11,082 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) [2025-03-08 05:44:11,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-03-08 05:44:11,256 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 814 statements into 93 equivalence classes. [2025-03-08 05:44:11,309 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) and asserted 239 of 814 statements. [2025-03-08 05:44:11,309 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2025-03-08 05:44:11,309 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:44:11,312 INFO L256 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-03-08 05:44:11,319 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:44:11,376 INFO L134 CoverageAnalysis]: Checked inductivity of 39488 backedges. 1358 proven. 3585 refuted. 0 times theorem prover too weak. 34545 trivial. 0 not checked. [2025-03-08 05:44:11,376 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:44:14,036 INFO L134 CoverageAnalysis]: Checked inductivity of 39488 backedges. 1366 proven. 3654 refuted. 0 times theorem prover too weak. 34468 trivial. 0 not checked. [2025-03-08 05:44:14,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263960052] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:44:14,036 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:44:14,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 19] total 21 [2025-03-08 05:44:14,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144201553] [2025-03-08 05:44:14,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:44:14,037 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-03-08 05:44:14,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:44:14,039 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-03-08 05:44:14,040 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2025-03-08 05:44:14,040 INFO L87 Difference]: Start difference. First operand 98 states and 142 transitions. Second operand has 21 states, 19 states have (on average 3.4210526315789473) internal successors, (65), 21 states have internal predecessors, (65), 17 states have call successors, (20), 1 states have call predecessors, (20), 9 states have return successors, (26), 11 states have call predecessors, (26), 17 states have call successors, (26) [2025-03-08 05:44:14,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:44:14,166 INFO L93 Difference]: Finished difference Result 110 states and 170 transitions. [2025-03-08 05:44:14,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-08 05:44:14,166 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 3.4210526315789473) internal successors, (65), 21 states have internal predecessors, (65), 17 states have call successors, (20), 1 states have call predecessors, (20), 9 states have return successors, (26), 11 states have call predecessors, (26), 17 states have call successors, (26) Word has length 814 [2025-03-08 05:44:14,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:44:14,168 INFO L225 Difference]: With dead ends: 110 [2025-03-08 05:44:14,168 INFO L226 Difference]: Without dead ends: 106 [2025-03-08 05:44:14,169 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1652 GetRequests, 1618 SyntacticMatches, 8 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=238, Invalid=518, Unknown=0, NotChecked=0, Total=756 [2025-03-08 05:44:14,169 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 49 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 05:44:14,169 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 95 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 05:44:14,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2025-03-08 05:44:14,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 103. [2025-03-08 05:44:14,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 72 states have (on average 1.0277777777777777) internal successors, (74), 70 states have internal predecessors, (74), 19 states have call successors, (19), 13 states have call predecessors, (19), 11 states have return successors, (65), 19 states have call predecessors, (65), 19 states have call successors, (65) [2025-03-08 05:44:14,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 158 transitions. [2025-03-08 05:44:14,177 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 158 transitions. Word has length 814 [2025-03-08 05:44:14,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:44:14,178 INFO L471 AbstractCegarLoop]: Abstraction has 103 states and 158 transitions. [2025-03-08 05:44:14,178 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 3.4210526315789473) internal successors, (65), 21 states have internal predecessors, (65), 17 states have call successors, (20), 1 states have call predecessors, (20), 9 states have return successors, (26), 11 states have call predecessors, (26), 17 states have call successors, (26) [2025-03-08 05:44:14,179 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 158 transitions. [2025-03-08 05:44:14,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1537 [2025-03-08 05:44:14,188 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:44:14,189 INFO L218 NwaCegarLoop]: trace histogram [225, 225, 182, 112, 112, 112, 112, 112, 112, 112, 70, 43, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:44:14,195 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2025-03-08 05:44:14,389 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,SelfDestructingSolverStorable14 [2025-03-08 05:44:14,389 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:44:14,390 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:44:14,390 INFO L85 PathProgramCache]: Analyzing trace with hash -110103902, now seen corresponding path program 13 times [2025-03-08 05:44:14,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:44:14,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944771708] [2025-03-08 05:44:14,390 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 05:44:14,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:44:14,412 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 1536 statements into 1 equivalence classes. [2025-03-08 05:44:14,540 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 1536 of 1536 statements. [2025-03-08 05:44:14,540 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:44:14,540 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:44:16,126 INFO L134 CoverageAnalysis]: Checked inductivity of 142135 backedges. 1452 proven. 10624 refuted. 0 times theorem prover too weak. 130059 trivial. 0 not checked. [2025-03-08 05:44:16,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:44:16,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944771708] [2025-03-08 05:44:16,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944771708] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:44:16,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575967976] [2025-03-08 05:44:16,126 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 05:44:16,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:44:16,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:44:16,128 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) [2025-03-08 05:44:16,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-03-08 05:44:16,344 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 1536 statements into 1 equivalence classes. [2025-03-08 05:44:16,573 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 1536 of 1536 statements. [2025-03-08 05:44:16,573 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:44:16,573 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:44:16,582 INFO L256 TraceCheckSpWp]: Trace formula consists of 3429 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-03-08 05:44:16,594 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:44:16,729 INFO L134 CoverageAnalysis]: Checked inductivity of 142135 backedges. 1452 proven. 10624 refuted. 0 times theorem prover too weak. 130059 trivial. 0 not checked. [2025-03-08 05:44:16,729 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:44:22,014 INFO L134 CoverageAnalysis]: Checked inductivity of 142135 backedges. 1452 proven. 10750 refuted. 0 times theorem prover too weak. 129933 trivial. 0 not checked. [2025-03-08 05:44:22,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575967976] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:44:22,014 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:44:22,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 23] total 25 [2025-03-08 05:44:22,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523686826] [2025-03-08 05:44:22,014 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:44:22,015 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-03-08 05:44:22,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:44:22,016 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-03-08 05:44:22,016 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2025-03-08 05:44:22,016 INFO L87 Difference]: Start difference. First operand 103 states and 158 transitions. Second operand has 25 states, 23 states have (on average 3.3043478260869565) internal successors, (76), 25 states have internal predecessors, (76), 22 states have call successors, (23), 1 states have call predecessors, (23), 11 states have return successors, (31), 11 states have call predecessors, (31), 22 states have call successors, (31) [2025-03-08 05:44:22,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:44:22,236 INFO L93 Difference]: Finished difference Result 120 states and 211 transitions. [2025-03-08 05:44:22,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-03-08 05:44:22,236 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 3.3043478260869565) internal successors, (76), 25 states have internal predecessors, (76), 22 states have call successors, (23), 1 states have call predecessors, (23), 11 states have return successors, (31), 11 states have call predecessors, (31), 22 states have call successors, (31) Word has length 1536 [2025-03-08 05:44:22,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:44:22,239 INFO L225 Difference]: With dead ends: 120 [2025-03-08 05:44:22,239 INFO L226 Difference]: Without dead ends: 116 [2025-03-08 05:44:22,239 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3102 GetRequests, 3060 SyntacticMatches, 10 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=356, Invalid=766, Unknown=0, NotChecked=0, Total=1122 [2025-03-08 05:44:22,240 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 138 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 05:44:22,240 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 123 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 05:44:22,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2025-03-08 05:44:22,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 108. [2025-03-08 05:44:22,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 75 states have (on average 1.0266666666666666) internal successors, (77), 73 states have internal predecessors, (77), 20 states have call successors, (20), 13 states have call predecessors, (20), 12 states have return successors, (79), 21 states have call predecessors, (79), 20 states have call successors, (79) [2025-03-08 05:44:22,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 176 transitions. [2025-03-08 05:44:22,251 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 176 transitions. Word has length 1536 [2025-03-08 05:44:22,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:44:22,251 INFO L471 AbstractCegarLoop]: Abstraction has 108 states and 176 transitions. [2025-03-08 05:44:22,252 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 3.3043478260869565) internal successors, (76), 25 states have internal predecessors, (76), 22 states have call successors, (23), 1 states have call predecessors, (23), 11 states have return successors, (31), 11 states have call predecessors, (31), 22 states have call successors, (31) [2025-03-08 05:44:22,252 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 176 transitions. [2025-03-08 05:44:22,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2408 [2025-03-08 05:44:22,296 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:44:22,297 INFO L218 NwaCegarLoop]: trace histogram [353, 353, 285, 176, 176, 176, 176, 176, 176, 176, 109, 68, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:44:22,307 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2025-03-08 05:44:22,497 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:44:22,497 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:44:22,498 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:44:22,499 INFO L85 PathProgramCache]: Analyzing trace with hash 1104519535, now seen corresponding path program 14 times [2025-03-08 05:44:22,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:44:22,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995544021] [2025-03-08 05:44:22,499 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 05:44:22,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:44:22,532 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 2407 statements into 2 equivalence classes. [2025-03-08 05:44:22,857 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 2407 of 2407 statements. [2025-03-08 05:44:22,857 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 05:44:22,857 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:44:26,890 INFO L134 CoverageAnalysis]: Checked inductivity of 350582 backedges. 2438 proven. 18747 refuted. 0 times theorem prover too weak. 329397 trivial. 0 not checked. [2025-03-08 05:44:26,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:44:26,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995544021] [2025-03-08 05:44:26,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995544021] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:44:26,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139541693] [2025-03-08 05:44:26,891 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 05:44:26,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:44:26,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:44:26,893 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) [2025-03-08 05:44:26,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-03-08 05:44:27,179 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 2407 statements into 2 equivalence classes. [2025-03-08 05:44:27,565 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 2407 of 2407 statements. [2025-03-08 05:44:27,566 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 05:44:27,566 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:44:27,581 INFO L256 TraceCheckSpWp]: Trace formula consists of 5363 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-03-08 05:44:27,599 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:44:27,705 INFO L134 CoverageAnalysis]: Checked inductivity of 350582 backedges. 2438 proven. 18747 refuted. 0 times theorem prover too weak. 329397 trivial. 0 not checked. [2025-03-08 05:44:27,705 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:44:35,655 INFO L134 CoverageAnalysis]: Checked inductivity of 350582 backedges. 2438 proven. 18902 refuted. 0 times theorem prover too weak. 329242 trivial. 0 not checked. [2025-03-08 05:44:35,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139541693] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:44:35,655 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:44:35,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 25] total 27 [2025-03-08 05:44:35,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253146394] [2025-03-08 05:44:35,656 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:44:35,657 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2025-03-08 05:44:35,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:44:35,658 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2025-03-08 05:44:35,658 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=518, Unknown=0, NotChecked=0, Total=702 [2025-03-08 05:44:35,658 INFO L87 Difference]: Start difference. First operand 108 states and 176 transitions. Second operand has 27 states, 25 states have (on average 3.28) internal successors, (82), 27 states have internal predecessors, (82), 24 states have call successors, (25), 1 states have call predecessors, (25), 12 states have return successors, (34), 12 states have call predecessors, (34), 24 states have call successors, (34) [2025-03-08 05:44:35,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:44:35,925 INFO L93 Difference]: Finished difference Result 117 states and 200 transitions. [2025-03-08 05:44:35,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-08 05:44:35,925 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 3.28) internal successors, (82), 27 states have internal predecessors, (82), 24 states have call successors, (25), 1 states have call predecessors, (25), 12 states have return successors, (34), 12 states have call predecessors, (34), 24 states have call successors, (34) Word has length 2407 [2025-03-08 05:44:35,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:44:35,928 INFO L225 Difference]: With dead ends: 117 [2025-03-08 05:44:35,928 INFO L226 Difference]: Without dead ends: 113 [2025-03-08 05:44:35,929 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4847 GetRequests, 4801 SyntacticMatches, 11 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=424, Invalid=908, Unknown=0, NotChecked=0, Total=1332 [2025-03-08 05:44:35,929 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 204 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 357 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 357 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-08 05:44:35,929 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [222 Valid, 114 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [357 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-08 05:44:35,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2025-03-08 05:44:35,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2025-03-08 05:44:35,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 78 states have (on average 1.0256410256410255) internal successors, (80), 76 states have internal predecessors, (80), 21 states have call successors, (21), 13 states have call predecessors, (21), 13 states have return successors, (95), 23 states have call predecessors, (95), 21 states have call successors, (95) [2025-03-08 05:44:35,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 196 transitions. [2025-03-08 05:44:35,936 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 196 transitions. Word has length 2407 [2025-03-08 05:44:35,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:44:35,937 INFO L471 AbstractCegarLoop]: Abstraction has 113 states and 196 transitions. [2025-03-08 05:44:35,938 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 3.28) internal successors, (82), 27 states have internal predecessors, (82), 24 states have call successors, (25), 1 states have call predecessors, (25), 12 states have return successors, (34), 12 states have call predecessors, (34), 24 states have call successors, (34) [2025-03-08 05:44:35,938 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 196 transitions. [2025-03-08 05:44:36,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4696 [2025-03-08 05:44:36,012 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:44:36,013 INFO L218 NwaCegarLoop]: trace histogram [689, 689, 557, 344, 344, 344, 344, 344, 344, 344, 213, 132, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:44:36,026 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2025-03-08 05:44:36,213 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,SelfDestructingSolverStorable16 [2025-03-08 05:44:36,214 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:44:36,214 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:44:36,215 INFO L85 PathProgramCache]: Analyzing trace with hash -1406486443, now seen corresponding path program 15 times [2025-03-08 05:44:36,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:44:36,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738188982] [2025-03-08 05:44:36,215 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 05:44:36,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:44:36,301 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 4695 statements into 584 equivalence classes. [2025-03-08 05:44:36,336 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) and asserted 417 of 4695 statements. [2025-03-08 05:44:36,336 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2025-03-08 05:44:36,336 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:44:36,704 INFO L134 CoverageAnalysis]: Checked inductivity of 1338894 backedges. 4835 proven. 41026 refuted. 0 times theorem prover too weak. 1293033 trivial. 0 not checked. [2025-03-08 05:44:36,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:44:36,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738188982] [2025-03-08 05:44:36,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738188982] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:44:36,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318393544] [2025-03-08 05:44:36,705 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 05:44:36,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:44:36,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:44:36,707 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) [2025-03-08 05:44:36,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-03-08 05:44:37,142 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 4695 statements into 584 equivalence classes. [2025-03-08 05:44:37,230 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) and asserted 417 of 4695 statements. [2025-03-08 05:44:37,230 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2025-03-08 05:44:37,230 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:44:37,235 INFO L256 TraceCheckSpWp]: Trace formula consists of 938 conjuncts, 26 conjuncts are in the unsatisfiable core [2025-03-08 05:44:37,266 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:44:37,475 INFO L134 CoverageAnalysis]: Checked inductivity of 1338894 backedges. 4835 proven. 41026 refuted. 0 times theorem prover too weak. 1293033 trivial. 0 not checked. [2025-03-08 05:44:37,475 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:44:51,773 INFO L134 CoverageAnalysis]: Checked inductivity of 1338894 backedges. 4835 proven. 41213 refuted. 0 times theorem prover too weak. 1292846 trivial. 0 not checked. [2025-03-08 05:44:51,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318393544] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:44:51,774 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:44:51,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 27] total 29 [2025-03-08 05:44:51,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219930573] [2025-03-08 05:44:51,775 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:44:51,778 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2025-03-08 05:44:51,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:44:51,778 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2025-03-08 05:44:51,779 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=600, Unknown=0, NotChecked=0, Total=812 [2025-03-08 05:44:51,779 INFO L87 Difference]: Start difference. First operand 113 states and 196 transitions. Second operand has 29 states, 27 states have (on average 3.259259259259259) internal successors, (88), 29 states have internal predecessors, (88), 26 states have call successors, (27), 1 states have call predecessors, (27), 13 states have return successors, (37), 13 states have call predecessors, (37), 26 states have call successors, (37) [2025-03-08 05:44:52,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:44:52,075 INFO L93 Difference]: Finished difference Result 122 states and 222 transitions. [2025-03-08 05:44:52,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-03-08 05:44:52,076 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 3.259259259259259) internal successors, (88), 29 states have internal predecessors, (88), 26 states have call successors, (27), 1 states have call predecessors, (27), 13 states have return successors, (37), 13 states have call predecessors, (37), 26 states have call successors, (37) Word has length 4695 [2025-03-08 05:44:52,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:44:52,080 INFO L225 Difference]: With dead ends: 122 [2025-03-08 05:44:52,080 INFO L226 Difference]: Without dead ends: 118 [2025-03-08 05:44:52,080 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 9426 GetRequests, 9376 SyntacticMatches, 12 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=498, Invalid=1062, Unknown=0, NotChecked=0, Total=1560 [2025-03-08 05:44:52,081 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 270 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 428 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 428 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-08 05:44:52,081 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [288 Valid, 134 Invalid, 546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [428 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-08 05:44:52,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2025-03-08 05:44:52,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2025-03-08 05:44:52,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 81 states have (on average 1.0246913580246915) internal successors, (83), 79 states have internal predecessors, (83), 22 states have call successors, (22), 13 states have call predecessors, (22), 14 states have return successors, (113), 25 states have call predecessors, (113), 22 states have call successors, (113) [2025-03-08 05:44:52,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 218 transitions. [2025-03-08 05:44:52,088 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 218 transitions. Word has length 4695 [2025-03-08 05:44:52,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:44:52,090 INFO L471 AbstractCegarLoop]: Abstraction has 118 states and 218 transitions. [2025-03-08 05:44:52,090 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 3.259259259259259) internal successors, (88), 29 states have internal predecessors, (88), 26 states have call successors, (27), 1 states have call predecessors, (27), 13 states have return successors, (37), 13 states have call predecessors, (37), 26 states have call successors, (37) [2025-03-08 05:44:52,091 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 218 transitions. [2025-03-08 05:44:52,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10116 [2025-03-08 05:44:52,463 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:44:52,466 INFO L218 NwaCegarLoop]: trace histogram [1485, 1485, 1201, 742, 742, 742, 742, 742, 742, 742, 459, 284, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:44:52,474 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2025-03-08 05:44:52,666 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,SelfDestructingSolverStorable17 [2025-03-08 05:44:52,666 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:44:52,667 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:44:52,668 INFO L85 PathProgramCache]: Analyzing trace with hash -1703657899, now seen corresponding path program 16 times [2025-03-08 05:44:52,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:44:52,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956349332] [2025-03-08 05:44:52,669 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 05:44:52,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:44:52,814 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 10115 statements into 2 equivalence classes. [2025-03-08 05:44:56,461 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 8627 of 10115 statements. [2025-03-08 05:44:56,462 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-08 05:44:56,462 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat