./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-invgen/seq-3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 798a7b37 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/loop-invgen/seq-3.i -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 6c770a3141edeab927df0da4e8c2152e1fb2e87b0c43a352500a7e3d3cff4533 --- Real Ultimate output --- This is Ultimate 0.3.0-?-798a7b3-m [2025-03-03 13:32:53,175 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-03 13:32:53,226 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-03 13:32:53,231 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-03 13:32:53,233 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-03 13:32:53,248 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-03 13:32:53,248 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-03 13:32:53,248 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-03 13:32:53,249 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-03 13:32:53,249 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-03 13:32:53,249 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-03 13:32:53,249 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-03 13:32:53,249 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-03 13:32:53,249 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-03 13:32:53,249 INFO L153 SettingsManager]: * Use SBE=true [2025-03-03 13:32:53,249 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-03 13:32:53,249 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-03 13:32:53,249 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-03 13:32:53,249 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-03 13:32:53,249 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-03 13:32:53,249 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-03 13:32:53,249 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-03 13:32:53,249 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-03 13:32:53,250 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-03 13:32:53,250 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-03 13:32:53,250 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-03 13:32:53,250 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-03 13:32:53,250 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-03 13:32:53,250 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-03 13:32:53,250 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-03 13:32:53,250 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-03 13:32:53,250 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-03 13:32:53,250 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-03 13:32:53,250 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-03 13:32:53,250 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-03 13:32:53,250 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-03 13:32:53,250 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-03 13:32:53,250 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-03 13:32:53,250 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-03 13:32:53,250 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-03 13:32:53,250 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-03 13:32:53,250 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-03 13:32:53,250 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-03 13:32:53,251 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 -> 6c770a3141edeab927df0da4e8c2152e1fb2e87b0c43a352500a7e3d3cff4533 [2025-03-03 13:32:53,488 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-03 13:32:53,496 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-03 13:32:53,498 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-03 13:32:53,499 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-03 13:32:53,499 INFO L274 PluginConnector]: CDTParser initialized [2025-03-03 13:32:53,501 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-invgen/seq-3.i [2025-03-03 13:32:54,623 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/65912afc1/03e3a97bf5404f1792670e7ad1eb319a/FLAGa65fa4aa9 [2025-03-03 13:32:54,823 INFO L384 CDTParser]: Found 1 translation units. [2025-03-03 13:32:54,837 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-invgen/seq-3.i [2025-03-03 13:32:54,852 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/65912afc1/03e3a97bf5404f1792670e7ad1eb319a/FLAGa65fa4aa9 [2025-03-03 13:32:55,186 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/65912afc1/03e3a97bf5404f1792670e7ad1eb319a [2025-03-03 13:32:55,188 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-03 13:32:55,189 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-03 13:32:55,190 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-03 13:32:55,190 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-03 13:32:55,193 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-03 13:32:55,194 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.03 01:32:55" (1/1) ... [2025-03-03 13:32:55,195 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b43c678 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:32:55, skipping insertion in model container [2025-03-03 13:32:55,195 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.03 01:32:55" (1/1) ... [2025-03-03 13:32:55,205 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-03 13:32:55,305 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/loop-invgen/seq-3.i[893,906] [2025-03-03 13:32:55,320 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-03 13:32:55,326 INFO L200 MainTranslator]: Completed pre-run [2025-03-03 13:32:55,334 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/loop-invgen/seq-3.i[893,906] [2025-03-03 13:32:55,339 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-03 13:32:55,349 INFO L204 MainTranslator]: Completed translation [2025-03-03 13:32:55,350 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:32:55 WrapperNode [2025-03-03 13:32:55,350 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-03 13:32:55,351 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-03 13:32:55,351 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-03 13:32:55,351 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-03 13:32:55,356 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:32:55" (1/1) ... [2025-03-03 13:32:55,361 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:32:55" (1/1) ... [2025-03-03 13:32:55,371 INFO L138 Inliner]: procedures = 16, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 56 [2025-03-03 13:32:55,372 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-03 13:32:55,373 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-03 13:32:55,373 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-03 13:32:55,373 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-03 13:32:55,378 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:32:55" (1/1) ... [2025-03-03 13:32:55,378 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:32:55" (1/1) ... [2025-03-03 13:32:55,383 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:32:55" (1/1) ... [2025-03-03 13:32:55,390 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]. [2025-03-03 13:32:55,393 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:32:55" (1/1) ... [2025-03-03 13:32:55,393 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:32:55" (1/1) ... [2025-03-03 13:32:55,395 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:32:55" (1/1) ... [2025-03-03 13:32:55,397 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:32:55" (1/1) ... [2025-03-03 13:32:55,400 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:32:55" (1/1) ... [2025-03-03 13:32:55,401 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:32:55" (1/1) ... [2025-03-03 13:32:55,402 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-03 13:32:55,402 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-03 13:32:55,402 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-03 13:32:55,402 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-03 13:32:55,403 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:32:55" (1/1) ... [2025-03-03 13:32:55,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-03 13:32:55,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:32:55,431 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) [2025-03-03 13:32:55,434 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 [2025-03-03 13:32:55,455 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-03 13:32:55,455 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-03 13:32:55,455 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-03 13:32:55,455 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-03 13:32:55,496 INFO L256 CfgBuilder]: Building ICFG [2025-03-03 13:32:55,498 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-03 13:32:55,612 INFO L? ?]: Removed 12 outVars from TransFormulas that were not future-live. [2025-03-03 13:32:55,612 INFO L307 CfgBuilder]: Performing block encoding [2025-03-03 13:32:55,617 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-03 13:32:55,618 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-03 13:32:55,618 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 03.03 01:32:55 BoogieIcfgContainer [2025-03-03 13:32:55,618 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-03 13:32:55,620 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-03 13:32:55,620 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-03 13:32:55,623 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-03 13:32:55,624 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.03 01:32:55" (1/3) ... [2025-03-03 13:32:55,624 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3de0d1b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.03 01:32:55, skipping insertion in model container [2025-03-03 13:32:55,624 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:32:55" (2/3) ... [2025-03-03 13:32:55,624 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3de0d1b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.03 01:32:55, skipping insertion in model container [2025-03-03 13:32:55,625 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 03.03 01:32:55" (3/3) ... [2025-03-03 13:32:55,626 INFO L128 eAbstractionObserver]: Analyzing ICFG seq-3.i [2025-03-03 13:32:55,638 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-03 13:32:55,640 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG seq-3.i that has 1 procedures, 14 locations, 1 initial locations, 3 loop locations, and 1 error locations. [2025-03-03 13:32:55,682 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-03 13:32:55,693 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;@473455ea, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-03 13:32:55,694 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-03 13:32:55,697 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 13 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:32:55,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2025-03-03 13:32:55,701 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:32:55,701 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:32:55,702 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:32:55,706 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:32:55,708 INFO L85 PathProgramCache]: Analyzing trace with hash 297828971, now seen corresponding path program 1 times [2025-03-03 13:32:55,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:32:55,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429307036] [2025-03-03 13:32:55,713 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:32:55,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:32:55,772 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-03-03 13:32:55,798 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-03-03 13:32:55,799 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:32:55,799 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:32:55,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:32:55,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:32:55,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429307036] [2025-03-03 13:32:55,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429307036] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 13:32:55,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-03 13:32:55,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-03 13:32:55,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357989582] [2025-03-03 13:32:55,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 13:32:55,976 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-03 13:32:55,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:32:55,989 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-03 13:32:55,990 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-03 13:32:55,991 INFO L87 Difference]: Start difference. First operand has 14 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 13 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:32:56,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:32:56,038 INFO L93 Difference]: Finished difference Result 26 states and 35 transitions. [2025-03-03 13:32:56,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-03 13:32:56,040 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2025-03-03 13:32:56,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:32:56,044 INFO L225 Difference]: With dead ends: 26 [2025-03-03 13:32:56,044 INFO L226 Difference]: Without dead ends: 13 [2025-03-03 13:32:56,046 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 [2025-03-03 13:32:56,048 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 2 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 13:32:56,048 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 33 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 13:32:56,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2025-03-03 13:32:56,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2025-03-03 13:32:56,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:32:56,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2025-03-03 13:32:56,068 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 9 [2025-03-03 13:32:56,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:32:56,069 INFO L471 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2025-03-03 13:32:56,069 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:32:56,069 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2025-03-03 13:32:56,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2025-03-03 13:32:56,069 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:32:56,069 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:32:56,070 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-03 13:32:56,070 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:32:56,070 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:32:56,070 INFO L85 PathProgramCache]: Analyzing trace with hash 643748569, now seen corresponding path program 1 times [2025-03-03 13:32:56,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:32:56,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456827160] [2025-03-03 13:32:56,070 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:32:56,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:32:56,075 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-03-03 13:32:56,081 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-03-03 13:32:56,081 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:32:56,081 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:32:56,196 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:32:56,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:32:56,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456827160] [2025-03-03 13:32:56,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456827160] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:32:56,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654956932] [2025-03-03 13:32:56,196 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:32:56,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:32:56,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:32:56,198 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) [2025-03-03 13:32:56,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-03 13:32:56,223 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-03-03 13:32:56,233 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-03-03 13:32:56,233 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:32:56,233 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:32:56,235 INFO L256 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-03-03 13:32:56,238 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:32:56,294 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:32:56,295 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-03 13:32:56,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654956932] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 13:32:56,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-03 13:32:56,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2025-03-03 13:32:56,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19734964] [2025-03-03 13:32:56,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 13:32:56,296 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-03 13:32:56,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:32:56,296 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-03 13:32:56,296 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2025-03-03 13:32:56,296 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:32:56,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:32:56,329 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2025-03-03 13:32:56,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-03 13:32:56,330 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2025-03-03 13:32:56,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:32:56,330 INFO L225 Difference]: With dead ends: 23 [2025-03-03 13:32:56,330 INFO L226 Difference]: Without dead ends: 21 [2025-03-03 13:32:56,331 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2025-03-03 13:32:56,331 INFO L435 NwaCegarLoop]: 9 mSDtfsCounter, 7 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 13:32:56,332 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 28 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 13:32:56,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2025-03-03 13:32:56,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 15. [2025-03-03 13:32:56,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:32:56,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2025-03-03 13:32:56,336 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 10 [2025-03-03 13:32:56,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:32:56,336 INFO L471 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2025-03-03 13:32:56,336 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:32:56,336 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2025-03-03 13:32:56,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2025-03-03 13:32:56,337 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:32:56,337 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:32:56,343 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-03-03 13:32:56,537 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:32:56,537 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:32:56,538 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:32:56,538 INFO L85 PathProgramCache]: Analyzing trace with hash 885483473, now seen corresponding path program 1 times [2025-03-03 13:32:56,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:32:56,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329708234] [2025-03-03 13:32:56,538 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:32:56,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:32:56,542 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-03-03 13:32:56,552 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-03-03 13:32:56,552 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:32:56,552 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:32:56,674 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:32:56,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:32:56,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329708234] [2025-03-03 13:32:56,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329708234] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:32:56,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408886545] [2025-03-03 13:32:56,675 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:32:56,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:32:56,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:32:56,677 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) [2025-03-03 13:32:56,678 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-03 13:32:56,699 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-03-03 13:32:56,713 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-03-03 13:32:56,713 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:32:56,713 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:32:56,715 INFO L256 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-03 13:32:56,715 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:32:56,808 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:32:56,808 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:32:56,870 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:32:56,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408886545] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:32:56,870 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:32:56,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2025-03-03 13:32:56,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387092] [2025-03-03 13:32:56,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:32:56,870 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-03 13:32:56,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:32:56,871 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-03 13:32:56,871 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2025-03-03 13:32:56,871 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:32:56,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:32:56,917 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2025-03-03 13:32:56,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-03 13:32:56,918 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2025-03-03 13:32:56,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:32:56,918 INFO L225 Difference]: With dead ends: 25 [2025-03-03 13:32:56,918 INFO L226 Difference]: Without dead ends: 16 [2025-03-03 13:32:56,918 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2025-03-03 13:32:56,919 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 13:32:56,919 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 42 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 13:32:56,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2025-03-03 13:32:56,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2025-03-03 13:32:56,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:32:56,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2025-03-03 13:32:56,921 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 13 [2025-03-03 13:32:56,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:32:56,921 INFO L471 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2025-03-03 13:32:56,921 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:32:56,921 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2025-03-03 13:32:56,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2025-03-03 13:32:56,921 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:32:56,921 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:32:56,930 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-03-03 13:32:57,121 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,SelfDestructingSolverStorable2 [2025-03-03 13:32:57,122 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:32:57,122 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:32:57,122 INFO L85 PathProgramCache]: Analyzing trace with hash 820839345, now seen corresponding path program 1 times [2025-03-03 13:32:57,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:32:57,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96139713] [2025-03-03 13:32:57,122 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:32:57,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:32:57,126 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-03-03 13:32:57,133 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-03-03 13:32:57,133 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:32:57,133 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:32:57,218 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:32:57,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:32:57,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96139713] [2025-03-03 13:32:57,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96139713] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:32:57,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616777243] [2025-03-03 13:32:57,219 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:32:57,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:32:57,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:32:57,220 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) [2025-03-03 13:32:57,222 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-03 13:32:57,245 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-03-03 13:32:57,253 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-03-03 13:32:57,253 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:32:57,253 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:32:57,255 INFO L256 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-03 13:32:57,256 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:32:57,321 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:32:57,321 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:32:57,375 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:32:57,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616777243] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:32:57,376 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:32:57,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2025-03-03 13:32:57,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207089934] [2025-03-03 13:32:57,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:32:57,376 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-03 13:32:57,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:32:57,377 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-03 13:32:57,377 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2025-03-03 13:32:57,377 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:32:57,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:32:57,441 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2025-03-03 13:32:57,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-03 13:32:57,442 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2025-03-03 13:32:57,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:32:57,443 INFO L225 Difference]: With dead ends: 27 [2025-03-03 13:32:57,443 INFO L226 Difference]: Without dead ends: 18 [2025-03-03 13:32:57,444 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2025-03-03 13:32:57,444 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:32:57,444 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 41 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:32:57,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2025-03-03 13:32:57,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2025-03-03 13:32:57,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.3125) internal successors, (21), 16 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:32:57,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2025-03-03 13:32:57,448 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 13 [2025-03-03 13:32:57,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:32:57,448 INFO L471 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2025-03-03 13:32:57,448 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:32:57,449 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2025-03-03 13:32:57,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2025-03-03 13:32:57,449 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:32:57,449 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:32:57,455 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-03-03 13:32:57,649 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:32:57,649 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:32:57,650 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:32:57,650 INFO L85 PathProgramCache]: Analyzing trace with hash 936104255, now seen corresponding path program 2 times [2025-03-03 13:32:57,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:32:57,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007600053] [2025-03-03 13:32:57,650 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:32:57,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:32:57,655 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 14 statements into 2 equivalence classes. [2025-03-03 13:32:57,661 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 14 of 14 statements. [2025-03-03 13:32:57,662 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:32:57,662 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:32:57,732 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:32:57,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:32:57,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007600053] [2025-03-03 13:32:57,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007600053] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:32:57,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4351952] [2025-03-03 13:32:57,732 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:32:57,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:32:57,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:32:57,734 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) [2025-03-03 13:32:57,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-03 13:32:57,757 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 14 statements into 2 equivalence classes. [2025-03-03 13:32:57,771 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 14 of 14 statements. [2025-03-03 13:32:57,771 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:32:57,771 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:32:57,773 INFO L256 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-03-03 13:32:57,774 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:32:57,809 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:32:57,810 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:32:57,846 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:32:57,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4351952] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:32:57,848 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:32:57,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 8 [2025-03-03 13:32:57,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642044710] [2025-03-03 13:32:57,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:32:57,848 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-03 13:32:57,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:32:57,848 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-03 13:32:57,849 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2025-03-03 13:32:57,849 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:32:57,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:32:57,888 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2025-03-03 13:32:57,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-03 13:32:57,889 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2025-03-03 13:32:57,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:32:57,889 INFO L225 Difference]: With dead ends: 28 [2025-03-03 13:32:57,889 INFO L226 Difference]: Without dead ends: 26 [2025-03-03 13:32:57,890 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 5 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2025-03-03 13:32:57,890 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 8 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 13:32:57,890 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 37 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 13:32:57,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2025-03-03 13:32:57,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 20. [2025-03-03 13:32:57,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:32:57,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2025-03-03 13:32:57,893 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 14 [2025-03-03 13:32:57,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:32:57,893 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2025-03-03 13:32:57,893 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:32:57,893 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2025-03-03 13:32:57,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2025-03-03 13:32:57,893 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:32:57,893 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:32:57,899 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-03-03 13:32:58,094 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:32:58,094 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:32:58,094 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:32:58,094 INFO L85 PathProgramCache]: Analyzing trace with hash 260048811, now seen corresponding path program 3 times [2025-03-03 13:32:58,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:32:58,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761814453] [2025-03-03 13:32:58,095 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 13:32:58,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:32:58,098 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 17 statements into 3 equivalence classes. [2025-03-03 13:32:58,103 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 17 of 17 statements. [2025-03-03 13:32:58,103 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-03-03 13:32:58,103 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:32:58,205 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:32:58,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:32:58,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761814453] [2025-03-03 13:32:58,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761814453] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:32:58,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963359425] [2025-03-03 13:32:58,206 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 13:32:58,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:32:58,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:32:58,209 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) [2025-03-03 13:32:58,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-03 13:32:58,235 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 17 statements into 3 equivalence classes. [2025-03-03 13:32:58,246 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 17 of 17 statements. [2025-03-03 13:32:58,246 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-03-03 13:32:58,246 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:32:58,246 INFO L256 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-03 13:32:58,247 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:32:58,373 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:32:58,373 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:32:58,442 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:32:58,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963359425] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:32:58,442 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:32:58,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2025-03-03 13:32:58,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138176420] [2025-03-03 13:32:58,442 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:32:58,442 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-03 13:32:58,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:32:58,443 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-03 13:32:58,443 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2025-03-03 13:32:58,443 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:32:58,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:32:58,504 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2025-03-03 13:32:58,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-03 13:32:58,504 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2025-03-03 13:32:58,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:32:58,505 INFO L225 Difference]: With dead ends: 34 [2025-03-03 13:32:58,505 INFO L226 Difference]: Without dead ends: 22 [2025-03-03 13:32:58,505 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2025-03-03 13:32:58,505 INFO L435 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 13:32:58,506 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 50 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 13:32:58,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2025-03-03 13:32:58,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2025-03-03 13:32:58,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:32:58,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2025-03-03 13:32:58,512 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 17 [2025-03-03 13:32:58,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:32:58,512 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2025-03-03 13:32:58,512 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:32:58,512 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2025-03-03 13:32:58,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2025-03-03 13:32:58,513 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:32:58,513 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:32:58,518 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-03-03 13:32:58,717 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:32:58,717 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:32:58,717 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:32:58,717 INFO L85 PathProgramCache]: Analyzing trace with hash 95728523, now seen corresponding path program 1 times [2025-03-03 13:32:58,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:32:58,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795591451] [2025-03-03 13:32:58,717 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:32:58,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:32:58,721 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-03-03 13:32:58,724 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-03-03 13:32:58,724 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:32:58,724 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:32:58,795 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:32:58,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:32:58,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795591451] [2025-03-03 13:32:58,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795591451] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:32:58,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717833084] [2025-03-03 13:32:58,795 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:32:58,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:32:58,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:32:58,797 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) [2025-03-03 13:32:58,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-03 13:32:58,817 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-03-03 13:32:58,824 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-03-03 13:32:58,824 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:32:58,824 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:32:58,825 INFO L256 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-03 13:32:58,826 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:32:58,925 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:32:58,926 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:32:58,979 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:32:58,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717833084] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:32:58,980 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:32:58,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2025-03-03 13:32:58,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710173954] [2025-03-03 13:32:58,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:32:58,980 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-03-03 13:32:58,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:32:58,980 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-03-03 13:32:58,980 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2025-03-03 13:32:58,981 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:32:59,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:32:59,024 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2025-03-03 13:32:59,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-03 13:32:59,025 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2025-03-03 13:32:59,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:32:59,025 INFO L225 Difference]: With dead ends: 35 [2025-03-03 13:32:59,025 INFO L226 Difference]: Without dead ends: 23 [2025-03-03 13:32:59,025 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2025-03-03 13:32:59,026 INFO L435 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 13:32:59,026 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 42 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 13:32:59,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2025-03-03 13:32:59,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2025-03-03 13:32:59,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:32:59,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2025-03-03 13:32:59,028 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 17 [2025-03-03 13:32:59,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:32:59,029 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2025-03-03 13:32:59,029 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:32:59,029 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2025-03-03 13:32:59,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2025-03-03 13:32:59,029 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:32:59,029 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:32:59,035 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-03-03 13:32:59,234 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:32:59,234 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:32:59,234 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:32:59,234 INFO L85 PathProgramCache]: Analyzing trace with hash -1572140117, now seen corresponding path program 2 times [2025-03-03 13:32:59,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:32:59,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923370684] [2025-03-03 13:32:59,234 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:32:59,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:32:59,237 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 17 statements into 2 equivalence classes. [2025-03-03 13:32:59,240 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-03-03 13:32:59,240 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:32:59,240 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:32:59,330 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:32:59,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:32:59,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923370684] [2025-03-03 13:32:59,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923370684] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:32:59,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809607263] [2025-03-03 13:32:59,330 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:32:59,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:32:59,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:32:59,332 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) [2025-03-03 13:32:59,334 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-03 13:32:59,353 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 17 statements into 2 equivalence classes. [2025-03-03 13:32:59,360 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-03-03 13:32:59,360 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:32:59,360 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:32:59,361 INFO L256 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-03 13:32:59,362 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:32:59,438 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:32:59,439 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:32:59,492 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:32:59,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809607263] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:32:59,493 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:32:59,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2025-03-03 13:32:59,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781306171] [2025-03-03 13:32:59,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:32:59,493 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-03 13:32:59,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:32:59,493 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-03 13:32:59,493 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2025-03-03 13:32:59,494 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:32:59,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:32:59,558 INFO L93 Difference]: Finished difference Result 36 states and 42 transitions. [2025-03-03 13:32:59,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-03 13:32:59,558 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2025-03-03 13:32:59,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:32:59,558 INFO L225 Difference]: With dead ends: 36 [2025-03-03 13:32:59,558 INFO L226 Difference]: Without dead ends: 24 [2025-03-03 13:32:59,559 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2025-03-03 13:32:59,559 INFO L435 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 13:32:59,559 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 65 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 13:32:59,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2025-03-03 13:32:59,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2025-03-03 13:32:59,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:32:59,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2025-03-03 13:32:59,561 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 17 [2025-03-03 13:32:59,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:32:59,561 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2025-03-03 13:32:59,563 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:32:59,563 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2025-03-03 13:32:59,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2025-03-03 13:32:59,563 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:32:59,563 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:32:59,571 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-03-03 13:32:59,766 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:32:59,767 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:32:59,767 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:32:59,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1103754727, now seen corresponding path program 4 times [2025-03-03 13:32:59,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:32:59,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118167946] [2025-03-03 13:32:59,767 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 13:32:59,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:32:59,770 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 18 statements into 2 equivalence classes. [2025-03-03 13:32:59,776 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-03-03 13:32:59,776 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-03 13:32:59,776 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:32:59,836 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:32:59,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:32:59,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118167946] [2025-03-03 13:32:59,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118167946] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:32:59,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410988789] [2025-03-03 13:32:59,836 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 13:32:59,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:32:59,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:32:59,838 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) [2025-03-03 13:32:59,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-03 13:32:59,857 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 18 statements into 2 equivalence classes. [2025-03-03 13:32:59,865 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-03-03 13:32:59,865 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-03 13:32:59,865 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:32:59,865 INFO L256 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-03 13:32:59,866 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:32:59,892 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:32:59,892 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:32:59,921 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:32:59,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410988789] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:32:59,921 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:32:59,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 8 [2025-03-03 13:32:59,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3453313] [2025-03-03 13:32:59,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:32:59,921 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-03 13:32:59,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:32:59,922 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-03 13:32:59,922 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2025-03-03 13:32:59,922 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:32:59,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:32:59,971 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2025-03-03 13:32:59,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-03 13:32:59,972 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2025-03-03 13:32:59,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:32:59,972 INFO L225 Difference]: With dead ends: 33 [2025-03-03 13:32:59,972 INFO L226 Difference]: Without dead ends: 31 [2025-03-03 13:32:59,972 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 31 SyntacticMatches, 6 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2025-03-03 13:32:59,973 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 13:32:59,973 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 50 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 13:32:59,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2025-03-03 13:32:59,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 25. [2025-03-03 13:32:59,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.25) internal successors, (30), 24 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:32:59,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2025-03-03 13:32:59,975 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 18 [2025-03-03 13:32:59,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:32:59,975 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2025-03-03 13:32:59,975 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:32:59,975 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2025-03-03 13:32:59,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2025-03-03 13:32:59,976 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:32:59,976 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:32:59,982 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-03-03 13:33:00,176 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,SelfDestructingSolverStorable8 [2025-03-03 13:33:00,177 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:33:00,177 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:33:00,177 INFO L85 PathProgramCache]: Analyzing trace with hash 313387153, now seen corresponding path program 5 times [2025-03-03 13:33:00,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:33:00,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335801468] [2025-03-03 13:33:00,177 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 13:33:00,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:33:00,181 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 21 statements into 4 equivalence classes. [2025-03-03 13:33:00,185 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 21 of 21 statements. [2025-03-03 13:33:00,186 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-03-03 13:33:00,186 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:33:00,265 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:00,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:33:00,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335801468] [2025-03-03 13:33:00,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335801468] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:33:00,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75586665] [2025-03-03 13:33:00,266 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 13:33:00,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:33:00,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:33:00,268 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) [2025-03-03 13:33:00,270 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-03 13:33:00,291 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 21 statements into 4 equivalence classes. [2025-03-03 13:33:00,300 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 21 of 21 statements. [2025-03-03 13:33:00,300 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-03-03 13:33:00,300 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:33:00,301 INFO L256 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-03 13:33:00,302 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:33:00,439 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:00,440 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:33:00,504 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:00,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75586665] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:33:00,504 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:33:00,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2025-03-03 13:33:00,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392042965] [2025-03-03 13:33:00,505 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:33:00,505 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-03-03 13:33:00,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:33:00,505 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-03-03 13:33:00,505 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2025-03-03 13:33:00,506 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:00,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:33:00,544 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2025-03-03 13:33:00,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-03 13:33:00,545 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2025-03-03 13:33:00,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:33:00,545 INFO L225 Difference]: With dead ends: 43 [2025-03-03 13:33:00,545 INFO L226 Difference]: Without dead ends: 28 [2025-03-03 13:33:00,546 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 8 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2025-03-03 13:33:00,546 INFO L435 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 13:33:00,546 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 42 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 13:33:00,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2025-03-03 13:33:00,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2025-03-03 13:33:00,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:00,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2025-03-03 13:33:00,548 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 21 [2025-03-03 13:33:00,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:33:00,549 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2025-03-03 13:33:00,549 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:00,549 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2025-03-03 13:33:00,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2025-03-03 13:33:00,549 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:33:00,549 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:33:00,555 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-03-03 13:33:00,750 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2025-03-03 13:33:00,750 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:33:00,750 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:33:00,750 INFO L85 PathProgramCache]: Analyzing trace with hash 1156162673, now seen corresponding path program 2 times [2025-03-03 13:33:00,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:33:00,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045224974] [2025-03-03 13:33:00,750 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:33:00,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:33:00,755 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-03-03 13:33:00,759 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-03 13:33:00,759 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:33:00,759 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:33:00,838 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:00,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:33:00,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045224974] [2025-03-03 13:33:00,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045224974] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:33:00,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261934269] [2025-03-03 13:33:00,838 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:33:00,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:33:00,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:33:00,841 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) [2025-03-03 13:33:00,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-03 13:33:00,862 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-03-03 13:33:00,870 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-03 13:33:00,870 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:33:00,870 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:33:00,871 INFO L256 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-03 13:33:00,871 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:33:00,992 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:00,993 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:33:01,067 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:01,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261934269] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:33:01,068 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:33:01,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2025-03-03 13:33:01,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329517990] [2025-03-03 13:33:01,068 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:33:01,068 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-03-03 13:33:01,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:33:01,069 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-03-03 13:33:01,069 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2025-03-03 13:33:01,069 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:01,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:33:01,135 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2025-03-03 13:33:01,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-03 13:33:01,136 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2025-03-03 13:33:01,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:33:01,136 INFO L225 Difference]: With dead ends: 44 [2025-03-03 13:33:01,136 INFO L226 Difference]: Without dead ends: 29 [2025-03-03 13:33:01,136 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 26 SyntacticMatches, 6 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2025-03-03 13:33:01,137 INFO L435 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 13:33:01,137 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 78 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 13:33:01,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2025-03-03 13:33:01,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2025-03-03 13:33:01,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:01,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2025-03-03 13:33:01,139 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 21 [2025-03-03 13:33:01,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:33:01,139 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2025-03-03 13:33:01,139 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:01,139 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2025-03-03 13:33:01,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2025-03-03 13:33:01,141 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:33:01,141 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:33:01,147 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-03-03 13:33:01,341 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,SelfDestructingSolverStorable10 [2025-03-03 13:33:01,342 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:33:01,342 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:33:01,342 INFO L85 PathProgramCache]: Analyzing trace with hash -2141786991, now seen corresponding path program 3 times [2025-03-03 13:33:01,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:33:01,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473206394] [2025-03-03 13:33:01,342 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 13:33:01,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:33:01,347 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 21 statements into 4 equivalence classes. [2025-03-03 13:33:01,355 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 21 of 21 statements. [2025-03-03 13:33:01,356 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-03-03 13:33:01,356 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:33:01,449 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:01,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:33:01,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473206394] [2025-03-03 13:33:01,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473206394] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:33:01,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030922083] [2025-03-03 13:33:01,450 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 13:33:01,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:33:01,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:33:01,451 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) [2025-03-03 13:33:01,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-03 13:33:01,478 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 21 statements into 4 equivalence classes. [2025-03-03 13:33:01,487 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 21 of 21 statements. [2025-03-03 13:33:01,488 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-03-03 13:33:01,488 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:33:01,489 INFO L256 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-03 13:33:01,489 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:33:01,594 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:01,595 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:33:01,661 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:01,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030922083] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:33:01,661 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:33:01,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2025-03-03 13:33:01,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343406745] [2025-03-03 13:33:01,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:33:01,662 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-03-03 13:33:01,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:33:01,662 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-03-03 13:33:01,663 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2025-03-03 13:33:01,663 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:01,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:33:01,718 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2025-03-03 13:33:01,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-03 13:33:01,719 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2025-03-03 13:33:01,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:33:01,719 INFO L225 Difference]: With dead ends: 45 [2025-03-03 13:33:01,719 INFO L226 Difference]: Without dead ends: 30 [2025-03-03 13:33:01,719 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 6 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2025-03-03 13:33:01,719 INFO L435 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 13:33:01,720 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 52 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 13:33:01,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2025-03-03 13:33:01,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 26. [2025-03-03 13:33:01,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:01,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2025-03-03 13:33:01,722 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 21 [2025-03-03 13:33:01,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:33:01,722 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2025-03-03 13:33:01,722 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:01,722 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2025-03-03 13:33:01,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2025-03-03 13:33:01,722 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:33:01,722 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:33:01,730 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2025-03-03 13:33:01,928 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,SelfDestructingSolverStorable11 [2025-03-03 13:33:01,928 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:33:01,928 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:33:01,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1139793807, now seen corresponding path program 3 times [2025-03-03 13:33:01,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:33:01,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042395172] [2025-03-03 13:33:01,928 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 13:33:01,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:33:01,935 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 21 statements into 4 equivalence classes. [2025-03-03 13:33:01,939 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 21 of 21 statements. [2025-03-03 13:33:01,939 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-03-03 13:33:01,939 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:33:02,020 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:02,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:33:02,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042395172] [2025-03-03 13:33:02,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042395172] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:33:02,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516865367] [2025-03-03 13:33:02,021 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 13:33:02,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:33:02,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:33:02,023 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) [2025-03-03 13:33:02,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-03 13:33:02,046 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 21 statements into 4 equivalence classes. [2025-03-03 13:33:02,056 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 21 of 21 statements. [2025-03-03 13:33:02,056 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-03-03 13:33:02,056 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:33:02,056 INFO L256 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-03 13:33:02,057 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:33:02,151 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:02,152 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:33:02,219 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:02,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516865367] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:33:02,219 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:33:02,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2025-03-03 13:33:02,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146818343] [2025-03-03 13:33:02,220 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:33:02,220 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-03-03 13:33:02,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:33:02,220 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-03-03 13:33:02,221 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2025-03-03 13:33:02,221 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:02,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:33:02,300 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2025-03-03 13:33:02,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-03 13:33:02,300 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2025-03-03 13:33:02,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:33:02,300 INFO L225 Difference]: With dead ends: 45 [2025-03-03 13:33:02,300 INFO L226 Difference]: Without dead ends: 30 [2025-03-03 13:33:02,301 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 28 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2025-03-03 13:33:02,301 INFO L435 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:33:02,301 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 57 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:33:02,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2025-03-03 13:33:02,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2025-03-03 13:33:02,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 26 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:02,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2025-03-03 13:33:02,303 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 21 [2025-03-03 13:33:02,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:33:02,303 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2025-03-03 13:33:02,306 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:02,306 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2025-03-03 13:33:02,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2025-03-03 13:33:02,308 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:33:02,308 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:33:02,314 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2025-03-03 13:33:02,509 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,SelfDestructingSolverStorable12 [2025-03-03 13:33:02,509 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:33:02,509 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:33:02,509 INFO L85 PathProgramCache]: Analyzing trace with hash -1734278145, now seen corresponding path program 6 times [2025-03-03 13:33:02,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:33:02,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217015469] [2025-03-03 13:33:02,509 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-03 13:33:02,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:33:02,513 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 22 statements into 4 equivalence classes. [2025-03-03 13:33:02,520 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) and asserted 22 of 22 statements. [2025-03-03 13:33:02,520 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2025-03-03 13:33:02,520 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:33:02,576 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:02,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:33:02,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217015469] [2025-03-03 13:33:02,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217015469] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:33:02,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918303257] [2025-03-03 13:33:02,576 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-03 13:33:02,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:33:02,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:33:02,578 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) [2025-03-03 13:33:02,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-03-03 13:33:02,599 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 22 statements into 4 equivalence classes. [2025-03-03 13:33:02,608 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) and asserted 22 of 22 statements. [2025-03-03 13:33:02,608 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2025-03-03 13:33:02,608 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:33:02,608 INFO L256 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-03 13:33:02,609 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:33:02,635 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:02,635 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:33:02,676 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:02,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918303257] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:33:02,676 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:33:02,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 10 [2025-03-03 13:33:02,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155120408] [2025-03-03 13:33:02,677 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:33:02,677 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-03 13:33:02,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:33:02,677 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-03 13:33:02,677 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2025-03-03 13:33:02,677 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:02,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:33:02,732 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2025-03-03 13:33:02,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-03 13:33:02,732 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2025-03-03 13:33:02,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:33:02,733 INFO L225 Difference]: With dead ends: 38 [2025-03-03 13:33:02,733 INFO L226 Difference]: Without dead ends: 36 [2025-03-03 13:33:02,733 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 37 SyntacticMatches, 8 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2025-03-03 13:33:02,733 INFO L435 NwaCegarLoop]: 12 mSDtfsCounter, 10 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 13:33:02,733 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 62 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 13:33:02,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2025-03-03 13:33:02,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 30. [2025-03-03 13:33:02,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 29 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:02,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2025-03-03 13:33:02,739 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 22 [2025-03-03 13:33:02,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:33:02,740 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2025-03-03 13:33:02,740 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:02,740 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2025-03-03 13:33:02,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2025-03-03 13:33:02,741 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:33:02,741 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:33:02,747 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2025-03-03 13:33:02,941 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,SelfDestructingSolverStorable13 [2025-03-03 13:33:02,942 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:33:02,942 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:33:02,942 INFO L85 PathProgramCache]: Analyzing trace with hash -1717773077, now seen corresponding path program 7 times [2025-03-03 13:33:02,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:33:02,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560030590] [2025-03-03 13:33:02,942 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-03 13:33:02,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:33:02,946 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-03-03 13:33:02,948 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-03-03 13:33:02,948 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:33:02,948 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:33:03,041 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:03,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:33:03,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560030590] [2025-03-03 13:33:03,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560030590] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:33:03,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862934317] [2025-03-03 13:33:03,042 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-03 13:33:03,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:33:03,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:33:03,044 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) [2025-03-03 13:33:03,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-03-03 13:33:03,068 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-03-03 13:33:03,077 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-03-03 13:33:03,077 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:33:03,077 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:33:03,078 INFO L256 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-03 13:33:03,078 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:33:03,245 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:03,246 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:33:03,329 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:03,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862934317] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:33:03,329 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:33:03,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 26 [2025-03-03 13:33:03,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547980782] [2025-03-03 13:33:03,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:33:03,329 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-03-03 13:33:03,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:33:03,330 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-03-03 13:33:03,330 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=519, Unknown=0, NotChecked=0, Total=650 [2025-03-03 13:33:03,330 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 26 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:03,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:33:03,394 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2025-03-03 13:33:03,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-03 13:33:03,394 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 26 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2025-03-03 13:33:03,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:33:03,395 INFO L225 Difference]: With dead ends: 52 [2025-03-03 13:33:03,395 INFO L226 Difference]: Without dead ends: 34 [2025-03-03 13:33:03,395 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 29 SyntacticMatches, 8 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=566, Unknown=0, NotChecked=0, Total=702 [2025-03-03 13:33:03,395 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:33:03,396 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 53 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:33:03,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2025-03-03 13:33:03,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 31. [2025-03-03 13:33:03,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 30 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:03,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2025-03-03 13:33:03,398 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 25 [2025-03-03 13:33:03,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:33:03,398 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2025-03-03 13:33:03,398 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 26 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:03,398 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2025-03-03 13:33:03,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2025-03-03 13:33:03,399 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:33:03,399 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:33:03,404 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2025-03-03 13:33:03,601 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:33:03,601 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:33:03,601 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:33:03,602 INFO L85 PathProgramCache]: Analyzing trace with hash -1915246389, now seen corresponding path program 4 times [2025-03-03 13:33:03,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:33:03,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060818774] [2025-03-03 13:33:03,602 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 13:33:03,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:33:03,605 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 25 statements into 2 equivalence classes. [2025-03-03 13:33:03,609 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 25 of 25 statements. [2025-03-03 13:33:03,609 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-03 13:33:03,609 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:33:03,697 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 26 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:03,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:33:03,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060818774] [2025-03-03 13:33:03,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060818774] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:33:03,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437380364] [2025-03-03 13:33:03,698 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 13:33:03,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:33:03,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:33:03,700 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) [2025-03-03 13:33:03,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-03-03 13:33:03,722 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 25 statements into 2 equivalence classes. [2025-03-03 13:33:03,731 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 25 of 25 statements. [2025-03-03 13:33:03,731 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-03 13:33:03,731 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:33:03,732 INFO L256 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-03 13:33:03,733 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:33:03,883 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 26 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:03,883 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:33:03,955 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 26 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:03,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437380364] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:33:03,955 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:33:03,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 22 [2025-03-03 13:33:03,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615382640] [2025-03-03 13:33:03,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:33:03,956 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-03-03 13:33:03,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:33:03,956 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-03-03 13:33:03,956 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2025-03-03 13:33:03,956 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:04,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:33:04,013 INFO L93 Difference]: Finished difference Result 54 states and 61 transitions. [2025-03-03 13:33:04,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-03 13:33:04,017 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2025-03-03 13:33:04,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:33:04,017 INFO L225 Difference]: With dead ends: 54 [2025-03-03 13:33:04,017 INFO L226 Difference]: Without dead ends: 36 [2025-03-03 13:33:04,017 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 31 SyntacticMatches, 10 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2025-03-03 13:33:04,018 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 13:33:04,018 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 54 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 13:33:04,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2025-03-03 13:33:04,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 31. [2025-03-03 13:33:04,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 30 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:04,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2025-03-03 13:33:04,020 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 25 [2025-03-03 13:33:04,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:33:04,021 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2025-03-03 13:33:04,021 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:04,021 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2025-03-03 13:33:04,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2025-03-03 13:33:04,021 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:33:04,021 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:33:04,027 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2025-03-03 13:33:04,226 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,SelfDestructingSolverStorable15 [2025-03-03 13:33:04,226 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:33:04,226 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:33:04,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1126424811, now seen corresponding path program 5 times [2025-03-03 13:33:04,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:33:04,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468343634] [2025-03-03 13:33:04,226 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 13:33:04,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:33:04,229 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 25 statements into 5 equivalence classes. [2025-03-03 13:33:04,236 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) and asserted 25 of 25 statements. [2025-03-03 13:33:04,237 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2025-03-03 13:33:04,237 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:33:04,314 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 26 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:04,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:33:04,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468343634] [2025-03-03 13:33:04,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468343634] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:33:04,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791295634] [2025-03-03 13:33:04,314 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 13:33:04,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:33:04,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:33:04,316 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) [2025-03-03 13:33:04,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-03-03 13:33:04,339 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 25 statements into 5 equivalence classes. [2025-03-03 13:33:04,348 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) and asserted 25 of 25 statements. [2025-03-03 13:33:04,348 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2025-03-03 13:33:04,348 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:33:04,349 INFO L256 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-03 13:33:04,349 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:33:04,478 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 26 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:04,478 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:33:04,547 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 26 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:04,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791295634] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:33:04,547 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:33:04,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 21 [2025-03-03 13:33:04,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112899394] [2025-03-03 13:33:04,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:33:04,547 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-03-03 13:33:04,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:33:04,548 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-03-03 13:33:04,548 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2025-03-03 13:33:04,548 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:04,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:33:04,600 INFO L93 Difference]: Finished difference Result 55 states and 62 transitions. [2025-03-03 13:33:04,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-03 13:33:04,601 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2025-03-03 13:33:04,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:33:04,601 INFO L225 Difference]: With dead ends: 55 [2025-03-03 13:33:04,601 INFO L226 Difference]: Without dead ends: 37 [2025-03-03 13:33:04,601 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 32 SyntacticMatches, 10 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2025-03-03 13:33:04,602 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 13:33:04,602 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 70 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 13:33:04,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2025-03-03 13:33:04,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 31. [2025-03-03 13:33:04,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 30 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:04,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2025-03-03 13:33:04,604 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 25 [2025-03-03 13:33:04,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:33:04,604 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2025-03-03 13:33:04,606 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:04,606 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2025-03-03 13:33:04,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2025-03-03 13:33:04,608 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:33:04,608 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:33:04,614 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2025-03-03 13:33:04,812 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,SelfDestructingSolverStorable16 [2025-03-03 13:33:04,812 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:33:04,812 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:33:04,812 INFO L85 PathProgramCache]: Analyzing trace with hash -715119413, now seen corresponding path program 6 times [2025-03-03 13:33:04,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:33:04,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608040448] [2025-03-03 13:33:04,812 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-03 13:33:04,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:33:04,815 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 25 statements into 5 equivalence classes. [2025-03-03 13:33:04,819 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) and asserted 25 of 25 statements. [2025-03-03 13:33:04,820 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2025-03-03 13:33:04,820 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:33:04,922 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 16 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:04,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:33:04,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608040448] [2025-03-03 13:33:04,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608040448] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:33:04,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897618317] [2025-03-03 13:33:04,923 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-03 13:33:04,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:33:04,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:33:04,925 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:33:04,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-03-03 13:33:04,948 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 25 statements into 5 equivalence classes. [2025-03-03 13:33:04,959 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) and asserted 25 of 25 statements. [2025-03-03 13:33:04,959 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2025-03-03 13:33:04,959 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:33:04,959 INFO L256 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-03 13:33:04,960 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:33:05,085 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 26 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:05,085 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:33:05,158 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 26 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:05,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897618317] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:33:05,158 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:33:05,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 23 [2025-03-03 13:33:05,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438052420] [2025-03-03 13:33:05,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:33:05,159 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-03-03 13:33:05,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:33:05,159 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-03-03 13:33:05,159 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2025-03-03 13:33:05,159 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:05,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:33:05,213 INFO L93 Difference]: Finished difference Result 55 states and 62 transitions. [2025-03-03 13:33:05,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-03 13:33:05,214 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2025-03-03 13:33:05,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:33:05,215 INFO L225 Difference]: With dead ends: 55 [2025-03-03 13:33:05,215 INFO L226 Difference]: Without dead ends: 37 [2025-03-03 13:33:05,215 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 32 SyntacticMatches, 8 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2025-03-03 13:33:05,215 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 13:33:05,215 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 73 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 13:33:05,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2025-03-03 13:33:05,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 31. [2025-03-03 13:33:05,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 30 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:05,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2025-03-03 13:33:05,219 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 25 [2025-03-03 13:33:05,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:33:05,219 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2025-03-03 13:33:05,219 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:05,219 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2025-03-03 13:33:05,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2025-03-03 13:33:05,219 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:33:05,219 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:33:05,225 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2025-03-03 13:33:05,424 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2025-03-03 13:33:05,424 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:33:05,424 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:33:05,424 INFO L85 PathProgramCache]: Analyzing trace with hash -358882069, now seen corresponding path program 4 times [2025-03-03 13:33:05,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:33:05,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154834309] [2025-03-03 13:33:05,424 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 13:33:05,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:33:05,427 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 25 statements into 2 equivalence classes. [2025-03-03 13:33:05,430 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 25 of 25 statements. [2025-03-03 13:33:05,430 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-03 13:33:05,430 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:33:05,508 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:05,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:33:05,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154834309] [2025-03-03 13:33:05,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154834309] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:33:05,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113610901] [2025-03-03 13:33:05,508 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 13:33:05,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:33:05,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:33:05,510 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:33:05,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-03-03 13:33:05,537 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 25 statements into 2 equivalence classes. [2025-03-03 13:33:05,546 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 25 of 25 statements. [2025-03-03 13:33:05,546 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-03 13:33:05,547 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:33:05,547 INFO L256 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-03 13:33:05,548 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:33:05,664 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:05,664 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:33:05,736 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:05,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113610901] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:33:05,736 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:33:05,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 19 [2025-03-03 13:33:05,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867610200] [2025-03-03 13:33:05,737 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:33:05,737 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-03-03 13:33:05,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:33:05,737 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-03-03 13:33:05,737 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2025-03-03 13:33:05,738 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:05,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:33:05,774 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2025-03-03 13:33:05,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-03 13:33:05,774 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2025-03-03 13:33:05,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:33:05,774 INFO L225 Difference]: With dead ends: 54 [2025-03-03 13:33:05,774 INFO L226 Difference]: Without dead ends: 36 [2025-03-03 13:33:05,775 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 34 SyntacticMatches, 10 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2025-03-03 13:33:05,775 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 13:33:05,775 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 13:33:05,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2025-03-03 13:33:05,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 32. [2025-03-03 13:33:05,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 31 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:05,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2025-03-03 13:33:05,778 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 25 [2025-03-03 13:33:05,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:33:05,778 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2025-03-03 13:33:05,778 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:05,778 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2025-03-03 13:33:05,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2025-03-03 13:33:05,778 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:33:05,778 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:33:05,784 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2025-03-03 13:33:05,979 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:33:05,979 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:33:05,979 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:33:05,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1889046873, now seen corresponding path program 8 times [2025-03-03 13:33:05,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:33:05,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244048080] [2025-03-03 13:33:05,979 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:33:05,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:33:05,982 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 26 statements into 2 equivalence classes. [2025-03-03 13:33:05,984 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 26 of 26 statements. [2025-03-03 13:33:05,984 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:33:05,984 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:33:06,045 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 10 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:06,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:33:06,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244048080] [2025-03-03 13:33:06,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244048080] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:33:06,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947027030] [2025-03-03 13:33:06,046 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:33:06,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:33:06,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:33:06,047 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:33:06,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2025-03-03 13:33:06,071 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 26 statements into 2 equivalence classes. [2025-03-03 13:33:06,080 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 26 of 26 statements. [2025-03-03 13:33:06,080 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:33:06,080 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:33:06,081 INFO L256 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-03-03 13:33:06,081 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:33:06,113 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:06,113 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:33:06,176 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:06,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947027030] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:33:06,177 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:33:06,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 11 [2025-03-03 13:33:06,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938165982] [2025-03-03 13:33:06,177 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:33:06,177 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-03-03 13:33:06,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:33:06,177 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-03-03 13:33:06,178 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2025-03-03 13:33:06,178 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:06,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:33:06,241 INFO L93 Difference]: Finished difference Result 43 states and 50 transitions. [2025-03-03 13:33:06,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-03-03 13:33:06,242 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2025-03-03 13:33:06,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:33:06,242 INFO L225 Difference]: With dead ends: 43 [2025-03-03 13:33:06,242 INFO L226 Difference]: Without dead ends: 41 [2025-03-03 13:33:06,242 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 43 SyntacticMatches, 11 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2025-03-03 13:33:06,243 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 13 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 13:33:06,243 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 59 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 13:33:06,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2025-03-03 13:33:06,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 35. [2025-03-03 13:33:06,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.2352941176470589) internal successors, (42), 34 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:06,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2025-03-03 13:33:06,245 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 26 [2025-03-03 13:33:06,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:33:06,245 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2025-03-03 13:33:06,245 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:06,245 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2025-03-03 13:33:06,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2025-03-03 13:33:06,246 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:33:06,246 INFO L218 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:33:06,252 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2025-03-03 13:33:06,450 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:33:06,450 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:33:06,450 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:33:06,450 INFO L85 PathProgramCache]: Analyzing trace with hash -360244911, now seen corresponding path program 9 times [2025-03-03 13:33:06,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:33:06,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971038917] [2025-03-03 13:33:06,450 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 13:33:06,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:33:06,453 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 29 statements into 6 equivalence classes. [2025-03-03 13:33:06,458 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 29 of 29 statements. [2025-03-03 13:33:06,458 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-03-03 13:33:06,458 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:33:06,583 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 27 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:06,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:33:06,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971038917] [2025-03-03 13:33:06,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971038917] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:33:06,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787222912] [2025-03-03 13:33:06,583 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 13:33:06,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:33:06,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:33:06,585 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:33:06,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2025-03-03 13:33:06,610 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 29 statements into 6 equivalence classes. [2025-03-03 13:33:06,621 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 29 of 29 statements. [2025-03-03 13:33:06,621 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-03-03 13:33:06,621 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:33:06,622 INFO L256 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-03-03 13:33:06,623 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:33:06,826 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 40 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:06,826 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:33:06,928 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 40 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:06,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787222912] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:33:06,928 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:33:06,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 30 [2025-03-03 13:33:06,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611298208] [2025-03-03 13:33:06,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:33:06,928 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2025-03-03 13:33:06,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:33:06,929 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2025-03-03 13:33:06,929 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=697, Unknown=0, NotChecked=0, Total=870 [2025-03-03 13:33:06,929 INFO L87 Difference]: Start difference. First operand 35 states and 42 transitions. Second operand has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 30 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:06,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:33:06,997 INFO L93 Difference]: Finished difference Result 61 states and 69 transitions. [2025-03-03 13:33:06,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-03 13:33:06,997 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 30 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2025-03-03 13:33:06,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:33:06,997 INFO L225 Difference]: With dead ends: 61 [2025-03-03 13:33:06,997 INFO L226 Difference]: Without dead ends: 40 [2025-03-03 13:33:06,998 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 33 SyntacticMatches, 10 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=178, Invalid=752, Unknown=0, NotChecked=0, Total=930 [2025-03-03 13:33:06,998 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 0 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:33:06,998 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 92 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:33:06,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2025-03-03 13:33:07,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 36. [2025-03-03 13:33:07,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 35 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:07,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2025-03-03 13:33:07,002 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 29 [2025-03-03 13:33:07,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:33:07,002 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2025-03-03 13:33:07,002 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 30 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:07,002 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2025-03-03 13:33:07,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2025-03-03 13:33:07,003 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:33:07,003 INFO L218 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:33:07,009 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2025-03-03 13:33:07,204 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2025-03-03 13:33:07,204 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:33:07,204 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:33:07,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1790506289, now seen corresponding path program 7 times [2025-03-03 13:33:07,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:33:07,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091750477] [2025-03-03 13:33:07,204 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-03 13:33:07,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:33:07,207 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-03-03 13:33:07,209 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-03-03 13:33:07,209 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:33:07,209 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:33:07,345 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 27 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:07,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:33:07,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091750477] [2025-03-03 13:33:07,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091750477] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:33:07,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119473456] [2025-03-03 13:33:07,345 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-03 13:33:07,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:33:07,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:33:07,348 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:33:07,349 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2025-03-03 13:33:07,373 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-03-03 13:33:07,383 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-03-03 13:33:07,383 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:33:07,383 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:33:07,383 INFO L256 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-03-03 13:33:07,384 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:33:07,575 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 40 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:07,575 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:33:07,680 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 40 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:07,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119473456] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:33:07,681 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:33:07,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 29 [2025-03-03 13:33:07,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100336010] [2025-03-03 13:33:07,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:33:07,681 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2025-03-03 13:33:07,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:33:07,681 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2025-03-03 13:33:07,681 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=657, Unknown=0, NotChecked=0, Total=812 [2025-03-03 13:33:07,682 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 29 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:07,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:33:07,744 INFO L93 Difference]: Finished difference Result 64 states and 72 transitions. [2025-03-03 13:33:07,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-03 13:33:07,745 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 29 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2025-03-03 13:33:07,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:33:07,745 INFO L225 Difference]: With dead ends: 64 [2025-03-03 13:33:07,745 INFO L226 Difference]: Without dead ends: 43 [2025-03-03 13:33:07,745 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 34 SyntacticMatches, 10 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=160, Invalid=710, Unknown=0, NotChecked=0, Total=870 [2025-03-03 13:33:07,749 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 0 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 13:33:07,749 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 58 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 13:33:07,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2025-03-03 13:33:07,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 36. [2025-03-03 13:33:07,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 35 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:07,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2025-03-03 13:33:07,753 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 29 [2025-03-03 13:33:07,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:33:07,754 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2025-03-03 13:33:07,754 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 29 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:07,754 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2025-03-03 13:33:07,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2025-03-03 13:33:07,754 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:33:07,754 INFO L218 NwaCegarLoop]: trace histogram [6, 5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:33:07,762 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2025-03-03 13:33:07,958 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2025-03-03 13:33:07,958 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:33:07,958 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:33:07,958 INFO L85 PathProgramCache]: Analyzing trace with hash -1326703279, now seen corresponding path program 8 times [2025-03-03 13:33:07,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:33:07,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9156651] [2025-03-03 13:33:07,958 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:33:07,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:33:07,961 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 29 statements into 2 equivalence classes. [2025-03-03 13:33:07,968 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 29 of 29 statements. [2025-03-03 13:33:07,968 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:33:07,968 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:33:08,083 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 27 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:08,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:33:08,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9156651] [2025-03-03 13:33:08,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9156651] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:33:08,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880683511] [2025-03-03 13:33:08,084 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:33:08,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:33:08,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:33:08,085 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:33:08,087 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2025-03-03 13:33:08,113 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 29 statements into 2 equivalence classes. [2025-03-03 13:33:08,123 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 29 of 29 statements. [2025-03-03 13:33:08,123 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:33:08,123 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:33:08,124 INFO L256 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-03-03 13:33:08,124 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:33:08,292 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 40 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:08,292 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:33:08,372 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 40 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:08,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880683511] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:33:08,372 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:33:08,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 28 [2025-03-03 13:33:08,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443617709] [2025-03-03 13:33:08,372 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:33:08,372 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-03-03 13:33:08,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:33:08,373 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-03-03 13:33:08,373 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2025-03-03 13:33:08,373 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 28 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:08,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:33:08,447 INFO L93 Difference]: Finished difference Result 65 states and 73 transitions. [2025-03-03 13:33:08,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-03 13:33:08,447 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 28 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2025-03-03 13:33:08,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:33:08,447 INFO L225 Difference]: With dead ends: 65 [2025-03-03 13:33:08,447 INFO L226 Difference]: Without dead ends: 44 [2025-03-03 13:33:08,447 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 35 SyntacticMatches, 10 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=146, Invalid=666, Unknown=0, NotChecked=0, Total=812 [2025-03-03 13:33:08,448 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 0 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:33:08,448 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 75 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:33:08,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2025-03-03 13:33:08,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 36. [2025-03-03 13:33:08,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 35 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:08,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2025-03-03 13:33:08,452 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 29 [2025-03-03 13:33:08,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:33:08,452 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2025-03-03 13:33:08,452 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 28 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:08,452 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2025-03-03 13:33:08,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2025-03-03 13:33:08,452 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:33:08,452 INFO L218 NwaCegarLoop]: trace histogram [6, 5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:33:08,458 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2025-03-03 13:33:08,657 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:33:08,657 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:33:08,657 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:33:08,657 INFO L85 PathProgramCache]: Analyzing trace with hash -2119995087, now seen corresponding path program 9 times [2025-03-03 13:33:08,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:33:08,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147655604] [2025-03-03 13:33:08,657 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 13:33:08,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:33:08,660 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 29 statements into 6 equivalence classes. [2025-03-03 13:33:08,664 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 29 of 29 statements. [2025-03-03 13:33:08,664 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-03-03 13:33:08,665 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:33:08,771 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 27 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:08,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:33:08,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147655604] [2025-03-03 13:33:08,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147655604] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:33:08,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503350178] [2025-03-03 13:33:08,771 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 13:33:08,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:33:08,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:33:08,773 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:33:08,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2025-03-03 13:33:08,799 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 29 statements into 6 equivalence classes. [2025-03-03 13:33:08,809 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 29 of 29 statements. [2025-03-03 13:33:08,809 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-03-03 13:33:08,809 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:33:08,809 INFO L256 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-03-03 13:33:08,810 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:33:08,968 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 40 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:08,968 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:33:09,053 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 40 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:09,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503350178] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:33:09,053 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:33:09,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 27 [2025-03-03 13:33:09,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801551928] [2025-03-03 13:33:09,053 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:33:09,053 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2025-03-03 13:33:09,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:33:09,054 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2025-03-03 13:33:09,054 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2025-03-03 13:33:09,054 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:09,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:33:09,119 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2025-03-03 13:33:09,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-03 13:33:09,119 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2025-03-03 13:33:09,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:33:09,120 INFO L225 Difference]: With dead ends: 66 [2025-03-03 13:33:09,120 INFO L226 Difference]: Without dead ends: 45 [2025-03-03 13:33:09,120 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 36 SyntacticMatches, 10 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=620, Unknown=0, NotChecked=0, Total=756 [2025-03-03 13:33:09,120 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 0 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:33:09,120 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 77 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:33:09,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2025-03-03 13:33:09,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 36. [2025-03-03 13:33:09,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 35 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:09,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2025-03-03 13:33:09,124 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 29 [2025-03-03 13:33:09,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:33:09,124 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2025-03-03 13:33:09,124 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:09,124 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2025-03-03 13:33:09,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2025-03-03 13:33:09,124 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:33:09,124 INFO L218 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:33:09,129 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2025-03-03 13:33:09,324 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:33:09,325 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:33:09,325 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:33:09,325 INFO L85 PathProgramCache]: Analyzing trace with hash 348266833, now seen corresponding path program 10 times [2025-03-03 13:33:09,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:33:09,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793465039] [2025-03-03 13:33:09,325 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 13:33:09,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:33:09,328 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 29 statements into 2 equivalence classes. [2025-03-03 13:33:09,330 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 29 of 29 statements. [2025-03-03 13:33:09,330 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-03 13:33:09,330 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:33:09,431 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 40 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:09,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:33:09,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793465039] [2025-03-03 13:33:09,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793465039] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:33:09,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069817786] [2025-03-03 13:33:09,432 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 13:33:09,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:33:09,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:33:09,434 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:33:09,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2025-03-03 13:33:09,460 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 29 statements into 2 equivalence classes. [2025-03-03 13:33:09,471 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 29 of 29 statements. [2025-03-03 13:33:09,471 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-03 13:33:09,472 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:33:09,472 INFO L256 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-03-03 13:33:09,473 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:33:09,623 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 40 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:09,623 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:33:09,704 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 40 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:09,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069817786] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:33:09,705 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:33:09,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2025-03-03 13:33:09,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715906077] [2025-03-03 13:33:09,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:33:09,705 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-03-03 13:33:09,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:33:09,705 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-03-03 13:33:09,706 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2025-03-03 13:33:09,706 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:09,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:33:09,766 INFO L93 Difference]: Finished difference Result 65 states and 73 transitions. [2025-03-03 13:33:09,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-03 13:33:09,766 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2025-03-03 13:33:09,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:33:09,767 INFO L225 Difference]: With dead ends: 65 [2025-03-03 13:33:09,767 INFO L226 Difference]: Without dead ends: 44 [2025-03-03 13:33:09,767 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 38 SyntacticMatches, 12 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2025-03-03 13:33:09,767 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 0 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:33:09,767 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 70 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:33:09,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2025-03-03 13:33:09,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 36. [2025-03-03 13:33:09,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 35 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:09,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2025-03-03 13:33:09,772 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 29 [2025-03-03 13:33:09,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:33:09,773 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2025-03-03 13:33:09,773 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:09,773 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2025-03-03 13:33:09,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2025-03-03 13:33:09,773 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:33:09,773 INFO L218 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:33:09,779 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2025-03-03 13:33:09,973 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2025-03-03 13:33:09,974 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:33:09,974 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:33:09,974 INFO L85 PathProgramCache]: Analyzing trace with hash 150793521, now seen corresponding path program 5 times [2025-03-03 13:33:09,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:33:09,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485720397] [2025-03-03 13:33:09,974 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 13:33:09,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:33:09,977 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 29 statements into 6 equivalence classes. [2025-03-03 13:33:09,982 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) and asserted 29 of 29 statements. [2025-03-03 13:33:09,982 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2025-03-03 13:33:09,982 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:33:10,080 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 40 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:10,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:33:10,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485720397] [2025-03-03 13:33:10,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485720397] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:33:10,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723804226] [2025-03-03 13:33:10,080 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 13:33:10,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:33:10,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:33:10,082 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:33:10,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2025-03-03 13:33:10,109 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 29 statements into 6 equivalence classes. [2025-03-03 13:33:10,120 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) and asserted 29 of 29 statements. [2025-03-03 13:33:10,120 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2025-03-03 13:33:10,120 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:33:10,120 INFO L256 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-03-03 13:33:10,121 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:33:10,248 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 40 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:10,248 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:33:10,315 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 40 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:10,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723804226] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:33:10,315 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:33:10,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2025-03-03 13:33:10,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410259226] [2025-03-03 13:33:10,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:33:10,316 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-03-03 13:33:10,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:33:10,316 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-03-03 13:33:10,316 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=394, Unknown=0, NotChecked=0, Total=506 [2025-03-03 13:33:10,316 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:10,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:33:10,363 INFO L93 Difference]: Finished difference Result 63 states and 72 transitions. [2025-03-03 13:33:10,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-03 13:33:10,364 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2025-03-03 13:33:10,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:33:10,364 INFO L225 Difference]: With dead ends: 63 [2025-03-03 13:33:10,364 INFO L226 Difference]: Without dead ends: 42 [2025-03-03 13:33:10,364 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 39 SyntacticMatches, 11 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=394, Unknown=0, NotChecked=0, Total=506 [2025-03-03 13:33:10,365 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 0 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 13:33:10,365 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 73 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 13:33:10,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2025-03-03 13:33:10,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 37. [2025-03-03 13:33:10,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.25) internal successors, (45), 36 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:10,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2025-03-03 13:33:10,368 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 29 [2025-03-03 13:33:10,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:33:10,368 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2025-03-03 13:33:10,368 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:10,368 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2025-03-03 13:33:10,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2025-03-03 13:33:10,369 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:33:10,369 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:33:10,375 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2025-03-03 13:33:10,569 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2025-03-03 13:33:10,570 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:33:10,571 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:33:10,571 INFO L85 PathProgramCache]: Analyzing trace with hash -1164515649, now seen corresponding path program 10 times [2025-03-03 13:33:10,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:33:10,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390253520] [2025-03-03 13:33:10,571 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 13:33:10,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:33:10,574 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 30 statements into 2 equivalence classes. [2025-03-03 13:33:10,576 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 30 of 30 statements. [2025-03-03 13:33:10,576 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-03 13:33:10,577 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:33:10,643 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:10,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:33:10,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390253520] [2025-03-03 13:33:10,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390253520] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:33:10,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387135181] [2025-03-03 13:33:10,643 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 13:33:10,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:33:10,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:33:10,646 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:33:10,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2025-03-03 13:33:10,675 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 30 statements into 2 equivalence classes. [2025-03-03 13:33:10,685 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 30 of 30 statements. [2025-03-03 13:33:10,685 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-03 13:33:10,686 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:33:10,686 INFO L256 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-03-03 13:33:10,687 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:33:10,716 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:10,716 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:33:10,781 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:10,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387135181] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:33:10,781 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:33:10,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 11 [2025-03-03 13:33:10,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874470107] [2025-03-03 13:33:10,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:33:10,781 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-03-03 13:33:10,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:33:10,782 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-03-03 13:33:10,782 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2025-03-03 13:33:10,782 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:10,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:33:10,831 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2025-03-03 13:33:10,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-03 13:33:10,831 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2025-03-03 13:33:10,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:33:10,831 INFO L225 Difference]: With dead ends: 48 [2025-03-03 13:33:10,831 INFO L226 Difference]: Without dead ends: 46 [2025-03-03 13:33:10,832 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 52 SyntacticMatches, 12 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=165, Unknown=0, NotChecked=0, Total=272 [2025-03-03 13:33:10,832 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 12 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 13:33:10,832 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 46 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 13:33:10,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2025-03-03 13:33:10,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2025-03-03 13:33:10,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.2307692307692308) internal successors, (48), 39 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:10,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2025-03-03 13:33:10,835 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 30 [2025-03-03 13:33:10,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:33:10,836 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2025-03-03 13:33:10,836 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:10,836 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2025-03-03 13:33:10,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2025-03-03 13:33:10,836 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:33:10,836 INFO L218 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:33:10,841 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2025-03-03 13:33:11,036 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2025-03-03 13:33:11,036 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:33:11,037 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:33:11,037 INFO L85 PathProgramCache]: Analyzing trace with hash -1634008533, now seen corresponding path program 11 times [2025-03-03 13:33:11,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:33:11,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134519987] [2025-03-03 13:33:11,037 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 13:33:11,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:33:11,040 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 33 statements into 7 equivalence classes. [2025-03-03 13:33:11,046 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) and asserted 33 of 33 statements. [2025-03-03 13:33:11,046 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2025-03-03 13:33:11,046 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:33:11,171 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 57 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:11,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:33:11,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134519987] [2025-03-03 13:33:11,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134519987] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:33:11,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103990120] [2025-03-03 13:33:11,172 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 13:33:11,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:33:11,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:33:11,174 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:33:11,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2025-03-03 13:33:11,201 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 33 statements into 7 equivalence classes. [2025-03-03 13:33:11,214 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) and asserted 33 of 33 statements. [2025-03-03 13:33:11,214 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2025-03-03 13:33:11,214 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:33:11,215 INFO L256 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-03-03 13:33:11,215 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:33:11,429 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 57 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:11,430 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:33:11,535 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 57 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:11,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103990120] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:33:11,535 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:33:11,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 32 [2025-03-03 13:33:11,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740691998] [2025-03-03 13:33:11,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:33:11,536 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2025-03-03 13:33:11,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:33:11,536 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2025-03-03 13:33:11,536 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=790, Unknown=0, NotChecked=0, Total=992 [2025-03-03 13:33:11,536 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand has 32 states, 32 states have (on average 2.0) internal successors, (64), 32 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:11,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:33:11,612 INFO L93 Difference]: Finished difference Result 70 states and 79 transitions. [2025-03-03 13:33:11,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-03-03 13:33:11,613 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 32 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2025-03-03 13:33:11,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:33:11,614 INFO L225 Difference]: With dead ends: 70 [2025-03-03 13:33:11,614 INFO L226 Difference]: Without dead ends: 46 [2025-03-03 13:33:11,614 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 37 SyntacticMatches, 14 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 577 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=202, Invalid=790, Unknown=0, NotChecked=0, Total=992 [2025-03-03 13:33:11,614 INFO L435 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:33:11,614 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 140 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:33:11,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2025-03-03 13:33:11,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 41. [2025-03-03 13:33:11,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.225) internal successors, (49), 40 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:11,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2025-03-03 13:33:11,619 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 33 [2025-03-03 13:33:11,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:33:11,619 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2025-03-03 13:33:11,619 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 32 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:11,619 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2025-03-03 13:33:11,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2025-03-03 13:33:11,619 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:33:11,619 INFO L218 NwaCegarLoop]: trace histogram [7, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:33:11,624 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2025-03-03 13:33:11,819 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2025-03-03 13:33:11,820 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:33:11,820 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:33:11,820 INFO L85 PathProgramCache]: Analyzing trace with hash -1195643381, now seen corresponding path program 11 times [2025-03-03 13:33:11,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:33:11,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784073809] [2025-03-03 13:33:11,820 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 13:33:11,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:33:11,823 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 33 statements into 7 equivalence classes. [2025-03-03 13:33:11,827 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) and asserted 33 of 33 statements. [2025-03-03 13:33:11,827 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2025-03-03 13:33:11,827 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:33:11,964 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 57 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:11,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:33:11,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784073809] [2025-03-03 13:33:11,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784073809] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:33:11,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205570267] [2025-03-03 13:33:11,966 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 13:33:11,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:33:11,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:33:11,967 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:33:11,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2025-03-03 13:33:11,998 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 33 statements into 7 equivalence classes. [2025-03-03 13:33:12,011 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) and asserted 33 of 33 statements. [2025-03-03 13:33:12,011 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2025-03-03 13:33:12,011 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:33:12,011 INFO L256 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-03-03 13:33:12,012 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:33:12,190 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 57 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:12,190 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:33:12,279 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 57 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:12,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205570267] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:33:12,279 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:33:12,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 30 [2025-03-03 13:33:12,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071551482] [2025-03-03 13:33:12,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:33:12,280 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2025-03-03 13:33:12,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:33:12,280 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2025-03-03 13:33:12,280 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=691, Unknown=0, NotChecked=0, Total=870 [2025-03-03 13:33:12,280 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:12,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:33:12,346 INFO L93 Difference]: Finished difference Result 74 states and 83 transitions. [2025-03-03 13:33:12,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-03-03 13:33:12,346 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2025-03-03 13:33:12,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:33:12,346 INFO L225 Difference]: With dead ends: 74 [2025-03-03 13:33:12,346 INFO L226 Difference]: Without dead ends: 50 [2025-03-03 13:33:12,347 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 39 SyntacticMatches, 14 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=179, Invalid=691, Unknown=0, NotChecked=0, Total=870 [2025-03-03 13:33:12,347 INFO L435 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:33:12,347 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 72 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:33:12,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2025-03-03 13:33:12,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 41. [2025-03-03 13:33:12,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.225) internal successors, (49), 40 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:12,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2025-03-03 13:33:12,355 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 33 [2025-03-03 13:33:12,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:33:12,355 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2025-03-03 13:33:12,355 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:12,355 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2025-03-03 13:33:12,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2025-03-03 13:33:12,355 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:33:12,355 INFO L218 NwaCegarLoop]: trace histogram [7, 6, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:33:12,361 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2025-03-03 13:33:12,556 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2025-03-03 13:33:12,556 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:33:12,556 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:33:12,556 INFO L85 PathProgramCache]: Analyzing trace with hash -488765909, now seen corresponding path program 12 times [2025-03-03 13:33:12,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:33:12,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822252825] [2025-03-03 13:33:12,556 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-03 13:33:12,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:33:12,560 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 33 statements into 7 equivalence classes. [2025-03-03 13:33:12,570 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) and asserted 33 of 33 statements. [2025-03-03 13:33:12,570 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2025-03-03 13:33:12,570 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:33:12,689 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 41 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:12,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:33:12,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822252825] [2025-03-03 13:33:12,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822252825] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:33:12,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817969035] [2025-03-03 13:33:12,690 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-03 13:33:12,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:33:12,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:33:12,691 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:33:12,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2025-03-03 13:33:12,723 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 33 statements into 7 equivalence classes. [2025-03-03 13:33:12,735 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) and asserted 33 of 33 statements. [2025-03-03 13:33:12,735 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2025-03-03 13:33:12,735 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:33:12,735 INFO L256 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-03-03 13:33:12,736 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:33:12,924 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 57 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:12,924 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:33:13,030 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 57 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:13,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817969035] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:33:13,030 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:33:13,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 32 [2025-03-03 13:33:13,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617951864] [2025-03-03 13:33:13,030 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:33:13,031 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2025-03-03 13:33:13,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:33:13,031 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2025-03-03 13:33:13,031 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=809, Unknown=0, NotChecked=0, Total=992 [2025-03-03 13:33:13,032 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 32 states, 32 states have (on average 2.125) internal successors, (68), 32 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:13,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:33:13,132 INFO L93 Difference]: Finished difference Result 76 states and 85 transitions. [2025-03-03 13:33:13,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-03-03 13:33:13,133 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.125) internal successors, (68), 32 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2025-03-03 13:33:13,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:33:13,133 INFO L225 Difference]: With dead ends: 76 [2025-03-03 13:33:13,133 INFO L226 Difference]: Without dead ends: 52 [2025-03-03 13:33:13,133 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 39 SyntacticMatches, 12 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=188, Invalid=868, Unknown=0, NotChecked=0, Total=1056 [2025-03-03 13:33:13,134 INFO L435 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:33:13,134 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 117 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:33:13,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2025-03-03 13:33:13,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 41. [2025-03-03 13:33:13,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.225) internal successors, (49), 40 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:13,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2025-03-03 13:33:13,141 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 33 [2025-03-03 13:33:13,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:33:13,142 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2025-03-03 13:33:13,142 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.125) internal successors, (68), 32 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:13,142 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2025-03-03 13:33:13,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2025-03-03 13:33:13,142 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:33:13,142 INFO L218 NwaCegarLoop]: trace histogram [7, 6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:33:13,149 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2025-03-03 13:33:13,342 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:33:13,343 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:33:13,343 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:33:13,343 INFO L85 PathProgramCache]: Analyzing trace with hash 503867915, now seen corresponding path program 13 times [2025-03-03 13:33:13,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:33:13,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932174138] [2025-03-03 13:33:13,343 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-03 13:33:13,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:33:13,350 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 33 statements into 1 equivalence classes. [2025-03-03 13:33:13,352 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 33 of 33 statements. [2025-03-03 13:33:13,352 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:33:13,352 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:33:13,461 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 41 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:13,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:33:13,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932174138] [2025-03-03 13:33:13,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932174138] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:33:13,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816822962] [2025-03-03 13:33:13,462 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-03 13:33:13,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:33:13,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:33:13,463 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:33:13,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2025-03-03 13:33:13,490 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 33 statements into 1 equivalence classes. [2025-03-03 13:33:13,499 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 33 of 33 statements. [2025-03-03 13:33:13,499 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:33:13,499 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:33:13,500 INFO L256 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-03-03 13:33:13,500 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:33:13,667 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 57 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:13,668 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:33:13,757 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 57 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:13,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816822962] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:33:13,757 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:33:13,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 31 [2025-03-03 13:33:13,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384125779] [2025-03-03 13:33:13,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:33:13,757 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2025-03-03 13:33:13,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:33:13,758 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2025-03-03 13:33:13,758 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=760, Unknown=0, NotChecked=0, Total=930 [2025-03-03 13:33:13,758 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 31 states, 31 states have (on average 2.161290322580645) internal successors, (67), 31 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:13,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:33:13,844 INFO L93 Difference]: Finished difference Result 77 states and 86 transitions. [2025-03-03 13:33:13,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-03-03 13:33:13,845 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.161290322580645) internal successors, (67), 31 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2025-03-03 13:33:13,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:33:13,846 INFO L225 Difference]: With dead ends: 77 [2025-03-03 13:33:13,846 INFO L226 Difference]: Without dead ends: 53 [2025-03-03 13:33:13,846 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 40 SyntacticMatches, 12 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 513 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=175, Invalid=817, Unknown=0, NotChecked=0, Total=992 [2025-03-03 13:33:13,846 INFO L435 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:33:13,846 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 100 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:33:13,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2025-03-03 13:33:13,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 41. [2025-03-03 13:33:13,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.225) internal successors, (49), 40 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:13,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2025-03-03 13:33:13,852 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 33 [2025-03-03 13:33:13,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:33:13,852 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2025-03-03 13:33:13,852 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.161290322580645) internal successors, (67), 31 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:13,853 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2025-03-03 13:33:13,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2025-03-03 13:33:13,853 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:33:13,853 INFO L218 NwaCegarLoop]: trace histogram [7, 6, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:33:13,859 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2025-03-03 13:33:14,053 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2025-03-03 13:33:14,053 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:33:14,054 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:33:14,054 INFO L85 PathProgramCache]: Analyzing trace with hash -1542321621, now seen corresponding path program 14 times [2025-03-03 13:33:14,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:33:14,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406900203] [2025-03-03 13:33:14,054 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:33:14,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:33:14,056 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 33 statements into 2 equivalence classes. [2025-03-03 13:33:14,059 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 33 of 33 statements. [2025-03-03 13:33:14,059 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:33:14,059 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:33:14,162 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 41 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:14,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:33:14,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406900203] [2025-03-03 13:33:14,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406900203] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:33:14,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274985203] [2025-03-03 13:33:14,163 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:33:14,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:33:14,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:33:14,165 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:33:14,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2025-03-03 13:33:14,197 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 33 statements into 2 equivalence classes. [2025-03-03 13:33:14,206 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 33 of 33 statements. [2025-03-03 13:33:14,206 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:33:14,206 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:33:14,207 INFO L256 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-03-03 13:33:14,207 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:33:14,367 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 57 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:14,367 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:33:14,453 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 57 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:14,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274985203] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:33:14,453 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:33:14,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 30 [2025-03-03 13:33:14,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141616364] [2025-03-03 13:33:14,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:33:14,454 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2025-03-03 13:33:14,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:33:14,454 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2025-03-03 13:33:14,454 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=709, Unknown=0, NotChecked=0, Total=870 [2025-03-03 13:33:14,454 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 30 states, 30 states have (on average 2.2) internal successors, (66), 30 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:14,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:33:14,550 INFO L93 Difference]: Finished difference Result 77 states and 86 transitions. [2025-03-03 13:33:14,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-03-03 13:33:14,550 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.2) internal successors, (66), 30 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2025-03-03 13:33:14,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:33:14,551 INFO L225 Difference]: With dead ends: 77 [2025-03-03 13:33:14,551 INFO L226 Difference]: Without dead ends: 53 [2025-03-03 13:33:14,552 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 41 SyntacticMatches, 12 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=166, Invalid=764, Unknown=0, NotChecked=0, Total=930 [2025-03-03 13:33:14,553 INFO L435 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:33:14,553 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 120 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:33:14,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2025-03-03 13:33:14,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 41. [2025-03-03 13:33:14,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.225) internal successors, (49), 40 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:14,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2025-03-03 13:33:14,560 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 33 [2025-03-03 13:33:14,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:33:14,560 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2025-03-03 13:33:14,560 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.2) internal successors, (66), 30 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:14,560 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2025-03-03 13:33:14,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2025-03-03 13:33:14,560 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:33:14,560 INFO L218 NwaCegarLoop]: trace histogram [7, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:33:14,566 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2025-03-03 13:33:14,760 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:33:14,761 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:33:14,761 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:33:14,761 INFO L85 PathProgramCache]: Analyzing trace with hash 608429579, now seen corresponding path program 15 times [2025-03-03 13:33:14,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:33:14,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819742398] [2025-03-03 13:33:14,761 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 13:33:14,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:33:14,764 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 33 statements into 7 equivalence classes. [2025-03-03 13:33:14,768 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) and asserted 33 of 33 statements. [2025-03-03 13:33:14,768 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2025-03-03 13:33:14,768 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:33:14,877 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 41 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:14,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:33:14,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819742398] [2025-03-03 13:33:14,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819742398] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:33:14,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576759985] [2025-03-03 13:33:14,877 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 13:33:14,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:33:14,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:33:14,879 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:33:14,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2025-03-03 13:33:14,907 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 33 statements into 7 equivalence classes. [2025-03-03 13:33:14,918 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) and asserted 33 of 33 statements. [2025-03-03 13:33:14,918 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2025-03-03 13:33:14,918 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:33:14,918 INFO L256 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-03-03 13:33:14,919 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:33:15,069 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 57 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:15,069 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:33:15,165 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 57 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:15,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576759985] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:33:15,165 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:33:15,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 29 [2025-03-03 13:33:15,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928170961] [2025-03-03 13:33:15,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:33:15,166 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2025-03-03 13:33:15,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:33:15,166 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2025-03-03 13:33:15,166 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=656, Unknown=0, NotChecked=0, Total=812 [2025-03-03 13:33:15,166 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:15,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:33:15,249 INFO L93 Difference]: Finished difference Result 75 states and 84 transitions. [2025-03-03 13:33:15,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-03-03 13:33:15,249 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2025-03-03 13:33:15,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:33:15,250 INFO L225 Difference]: With dead ends: 75 [2025-03-03 13:33:15,250 INFO L226 Difference]: Without dead ends: 51 [2025-03-03 13:33:15,250 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 42 SyntacticMatches, 12 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=161, Invalid=709, Unknown=0, NotChecked=0, Total=870 [2025-03-03 13:33:15,250 INFO L435 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:33:15,251 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 85 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:33:15,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2025-03-03 13:33:15,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 41. [2025-03-03 13:33:15,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.225) internal successors, (49), 40 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:15,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2025-03-03 13:33:15,256 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 33 [2025-03-03 13:33:15,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:33:15,256 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2025-03-03 13:33:15,256 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:15,256 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2025-03-03 13:33:15,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2025-03-03 13:33:15,256 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:33:15,256 INFO L218 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:33:15,262 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2025-03-03 13:33:15,457 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:33:15,457 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:33:15,457 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:33:15,457 INFO L85 PathProgramCache]: Analyzing trace with hash 1786187307, now seen corresponding path program 6 times [2025-03-03 13:33:15,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:33:15,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971566440] [2025-03-03 13:33:15,457 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-03 13:33:15,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:33:15,460 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 33 statements into 7 equivalence classes. [2025-03-03 13:33:15,464 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) and asserted 33 of 33 statements. [2025-03-03 13:33:15,464 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2025-03-03 13:33:15,464 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:33:15,581 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 41 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:15,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:33:15,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971566440] [2025-03-03 13:33:15,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971566440] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:33:15,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556245221] [2025-03-03 13:33:15,582 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-03 13:33:15,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:33:15,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:33:15,584 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:33:15,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2025-03-03 13:33:15,615 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 33 statements into 7 equivalence classes. [2025-03-03 13:33:15,628 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) and asserted 33 of 33 statements. [2025-03-03 13:33:15,628 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2025-03-03 13:33:15,628 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:33:15,629 INFO L256 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-03-03 13:33:15,630 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:33:15,801 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 57 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:15,801 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:33:15,899 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 57 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:15,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556245221] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:33:15,899 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:33:15,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 28 [2025-03-03 13:33:15,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794479614] [2025-03-03 13:33:15,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:33:15,900 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-03-03 13:33:15,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:33:15,900 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-03-03 13:33:15,900 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=601, Unknown=0, NotChecked=0, Total=756 [2025-03-03 13:33:15,900 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 28 states, 28 states have (on average 2.25) internal successors, (63), 28 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:15,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:33:15,986 INFO L93 Difference]: Finished difference Result 72 states and 82 transitions. [2025-03-03 13:33:15,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-03-03 13:33:15,986 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.25) internal successors, (63), 28 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2025-03-03 13:33:15,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:33:15,987 INFO L225 Difference]: With dead ends: 72 [2025-03-03 13:33:15,987 INFO L226 Difference]: Without dead ends: 48 [2025-03-03 13:33:15,987 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 43 SyntacticMatches, 12 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=160, Invalid=652, Unknown=0, NotChecked=0, Total=812 [2025-03-03 13:33:15,987 INFO L435 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:33:15,987 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 94 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:33:15,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2025-03-03 13:33:15,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2025-03-03 13:33:15,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.2439024390243902) internal successors, (51), 41 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:15,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 51 transitions. [2025-03-03 13:33:15,993 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 51 transitions. Word has length 33 [2025-03-03 13:33:15,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:33:15,994 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 51 transitions. [2025-03-03 13:33:15,994 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.25) internal successors, (63), 28 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:15,994 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 51 transitions. [2025-03-03 13:33:15,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2025-03-03 13:33:15,994 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:33:15,994 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:33:16,000 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2025-03-03 13:33:16,199 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2025-03-03 13:33:16,199 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:33:16,199 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:33:16,199 INFO L85 PathProgramCache]: Analyzing trace with hash 503998617, now seen corresponding path program 12 times [2025-03-03 13:33:16,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:33:16,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203319367] [2025-03-03 13:33:16,199 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-03 13:33:16,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:33:16,202 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 34 statements into 7 equivalence classes. [2025-03-03 13:33:16,206 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) and asserted 34 of 34 statements. [2025-03-03 13:33:16,206 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2025-03-03 13:33:16,207 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:33:16,285 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 21 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:16,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:33:16,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203319367] [2025-03-03 13:33:16,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203319367] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:33:16,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378212872] [2025-03-03 13:33:16,285 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-03 13:33:16,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:33:16,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:33:16,287 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:33:16,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2025-03-03 13:33:16,319 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 34 statements into 7 equivalence classes. [2025-03-03 13:33:16,330 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) and asserted 34 of 34 statements. [2025-03-03 13:33:16,330 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2025-03-03 13:33:16,330 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:33:16,330 INFO L256 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-03-03 13:33:16,331 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:33:16,358 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 28 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:16,358 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:33:16,423 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 28 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:16,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378212872] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:33:16,423 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:33:16,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 13 [2025-03-03 13:33:16,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530238404] [2025-03-03 13:33:16,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:33:16,423 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-03 13:33:16,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:33:16,423 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-03 13:33:16,424 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2025-03-03 13:33:16,424 INFO L87 Difference]: Start difference. First operand 42 states and 51 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:16,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:33:16,494 INFO L93 Difference]: Finished difference Result 53 states and 62 transitions. [2025-03-03 13:33:16,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-03-03 13:33:16,494 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2025-03-03 13:33:16,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:33:16,495 INFO L225 Difference]: With dead ends: 53 [2025-03-03 13:33:16,495 INFO L226 Difference]: Without dead ends: 51 [2025-03-03 13:33:16,495 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 58 SyntacticMatches, 14 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=137, Invalid=243, Unknown=0, NotChecked=0, Total=380 [2025-03-03 13:33:16,495 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 13 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 13:33:16,495 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 79 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 13:33:16,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2025-03-03 13:33:16,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 45. [2025-03-03 13:33:16,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.2272727272727273) internal successors, (54), 44 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:16,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 54 transitions. [2025-03-03 13:33:16,505 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 54 transitions. Word has length 34 [2025-03-03 13:33:16,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:33:16,505 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 54 transitions. [2025-03-03 13:33:16,505 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:16,505 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 54 transitions. [2025-03-03 13:33:16,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2025-03-03 13:33:16,505 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:33:16,505 INFO L218 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:33:16,511 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2025-03-03 13:33:16,705 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2025-03-03 13:33:16,705 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:33:16,706 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:33:16,706 INFO L85 PathProgramCache]: Analyzing trace with hash -582026735, now seen corresponding path program 13 times [2025-03-03 13:33:16,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:33:16,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213448643] [2025-03-03 13:33:16,706 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-03 13:33:16,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:33:16,709 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-03-03 13:33:16,712 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-03-03 13:33:16,712 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:33:16,712 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:33:16,841 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 58 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:16,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:33:16,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213448643] [2025-03-03 13:33:16,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213448643] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:33:16,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177025453] [2025-03-03 13:33:16,841 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-03 13:33:16,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:33:16,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:33:16,843 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:33:16,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2025-03-03 13:33:16,872 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-03-03 13:33:16,882 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-03-03 13:33:16,883 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:33:16,883 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:33:16,883 INFO L256 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-03-03 13:33:16,884 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:33:17,112 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 77 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:17,112 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:33:17,237 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 77 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:17,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177025453] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:33:17,237 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:33:17,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 38 [2025-03-03 13:33:17,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841568174] [2025-03-03 13:33:17,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:33:17,238 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2025-03-03 13:33:17,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:33:17,238 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2025-03-03 13:33:17,238 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=1131, Unknown=0, NotChecked=0, Total=1406 [2025-03-03 13:33:17,238 INFO L87 Difference]: Start difference. First operand 45 states and 54 transitions. Second operand has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:17,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:33:17,316 INFO L93 Difference]: Finished difference Result 79 states and 89 transitions. [2025-03-03 13:33:17,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-03-03 13:33:17,316 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2025-03-03 13:33:17,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:33:17,316 INFO L225 Difference]: With dead ends: 79 [2025-03-03 13:33:17,316 INFO L226 Difference]: Without dead ends: 52 [2025-03-03 13:33:17,317 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 41 SyntacticMatches, 14 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 866 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=280, Invalid=1202, Unknown=0, NotChecked=0, Total=1482 [2025-03-03 13:33:17,317 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:33:17,317 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 96 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:33:17,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2025-03-03 13:33:17,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 46. [2025-03-03 13:33:17,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.2222222222222223) internal successors, (55), 45 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:17,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 55 transitions. [2025-03-03 13:33:17,324 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 55 transitions. Word has length 37 [2025-03-03 13:33:17,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:33:17,324 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 55 transitions. [2025-03-03 13:33:17,324 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:17,324 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 55 transitions. [2025-03-03 13:33:17,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2025-03-03 13:33:17,324 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:33:17,324 INFO L218 NwaCegarLoop]: trace histogram [8, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:33:17,330 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2025-03-03 13:33:17,525 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2025-03-03 13:33:17,525 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:33:17,525 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:33:17,525 INFO L85 PathProgramCache]: Analyzing trace with hash -480840207, now seen corresponding path program 16 times [2025-03-03 13:33:17,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:33:17,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041072686] [2025-03-03 13:33:17,525 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 13:33:17,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:33:17,528 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 37 statements into 2 equivalence classes. [2025-03-03 13:33:17,531 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 37 of 37 statements. [2025-03-03 13:33:17,532 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-03 13:33:17,532 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:33:17,672 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 77 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:17,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:33:17,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041072686] [2025-03-03 13:33:17,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041072686] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:33:17,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727135117] [2025-03-03 13:33:17,673 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 13:33:17,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:33:17,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:33:17,674 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:33:17,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2025-03-03 13:33:17,710 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 37 statements into 2 equivalence classes. [2025-03-03 13:33:17,722 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 37 of 37 statements. [2025-03-03 13:33:17,723 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-03 13:33:17,723 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:33:17,723 INFO L256 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-03-03 13:33:17,724 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:33:17,957 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 77 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:17,958 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:33:18,053 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 77 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:18,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727135117] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:33:18,054 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:33:18,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 34 [2025-03-03 13:33:18,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639637080] [2025-03-03 13:33:18,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:33:18,054 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2025-03-03 13:33:18,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:33:18,054 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2025-03-03 13:33:18,054 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=894, Unknown=0, NotChecked=0, Total=1122 [2025-03-03 13:33:18,055 INFO L87 Difference]: Start difference. First operand 46 states and 55 transitions. Second operand has 34 states, 34 states have (on average 1.9705882352941178) internal successors, (67), 34 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:18,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:33:18,154 INFO L93 Difference]: Finished difference Result 84 states and 94 transitions. [2025-03-03 13:33:18,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-03-03 13:33:18,154 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.9705882352941178) internal successors, (67), 34 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2025-03-03 13:33:18,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:33:18,155 INFO L225 Difference]: With dead ends: 84 [2025-03-03 13:33:18,155 INFO L226 Difference]: Without dead ends: 57 [2025-03-03 13:33:18,155 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 43 SyntacticMatches, 16 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 623 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=228, Invalid=894, Unknown=0, NotChecked=0, Total=1122 [2025-03-03 13:33:18,155 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:33:18,156 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 117 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:33:18,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2025-03-03 13:33:18,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 46. [2025-03-03 13:33:18,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.2222222222222223) internal successors, (55), 45 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:18,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 55 transitions. [2025-03-03 13:33:18,163 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 55 transitions. Word has length 37 [2025-03-03 13:33:18,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:33:18,163 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 55 transitions. [2025-03-03 13:33:18,163 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.9705882352941178) internal successors, (67), 34 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:18,163 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 55 transitions. [2025-03-03 13:33:18,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2025-03-03 13:33:18,164 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:33:18,164 INFO L218 NwaCegarLoop]: trace histogram [8, 7, 7, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:33:18,170 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2025-03-03 13:33:18,369 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:33:18,369 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:33:18,369 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:33:18,369 INFO L85 PathProgramCache]: Analyzing trace with hash -2140144111, now seen corresponding path program 17 times [2025-03-03 13:33:18,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:33:18,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858571275] [2025-03-03 13:33:18,369 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 13:33:18,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:33:18,372 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 37 statements into 8 equivalence classes. [2025-03-03 13:33:18,378 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) and asserted 37 of 37 statements. [2025-03-03 13:33:18,378 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2025-03-03 13:33:18,378 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:33:18,524 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 77 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:18,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:33:18,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858571275] [2025-03-03 13:33:18,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858571275] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:33:18,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146632297] [2025-03-03 13:33:18,525 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 13:33:18,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:33:18,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:33:18,527 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:33:18,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2025-03-03 13:33:18,560 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 37 statements into 8 equivalence classes. [2025-03-03 13:33:18,575 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) and asserted 37 of 37 statements. [2025-03-03 13:33:18,575 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2025-03-03 13:33:18,575 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:33:18,576 INFO L256 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-03-03 13:33:18,577 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:33:18,774 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 77 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:18,774 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:33:18,885 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 77 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:18,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146632297] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:33:18,885 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:33:18,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 33 [2025-03-03 13:33:18,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270244610] [2025-03-03 13:33:18,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:33:18,885 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2025-03-03 13:33:18,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:33:18,886 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2025-03-03 13:33:18,886 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=847, Unknown=0, NotChecked=0, Total=1056 [2025-03-03 13:33:18,886 INFO L87 Difference]: Start difference. First operand 46 states and 55 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:18,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:33:18,967 INFO L93 Difference]: Finished difference Result 87 states and 97 transitions. [2025-03-03 13:33:18,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-03-03 13:33:18,968 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2025-03-03 13:33:18,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:33:18,968 INFO L225 Difference]: With dead ends: 87 [2025-03-03 13:33:18,968 INFO L226 Difference]: Without dead ends: 60 [2025-03-03 13:33:18,969 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 44 SyntacticMatches, 16 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 567 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=209, Invalid=847, Unknown=0, NotChecked=0, Total=1056 [2025-03-03 13:33:18,969 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:33:18,969 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 116 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:33:18,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2025-03-03 13:33:18,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 46. [2025-03-03 13:33:18,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.2222222222222223) internal successors, (55), 45 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:18,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 55 transitions. [2025-03-03 13:33:18,976 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 55 transitions. Word has length 37 [2025-03-03 13:33:18,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:33:18,977 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 55 transitions. [2025-03-03 13:33:18,977 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:18,977 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 55 transitions. [2025-03-03 13:33:18,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2025-03-03 13:33:18,977 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:33:18,977 INFO L218 NwaCegarLoop]: trace histogram [8, 7, 7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:33:18,982 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2025-03-03 13:33:19,177 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2025-03-03 13:33:19,177 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:33:19,178 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:33:19,178 INFO L85 PathProgramCache]: Analyzing trace with hash -1778028047, now seen corresponding path program 18 times [2025-03-03 13:33:19,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:33:19,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865190452] [2025-03-03 13:33:19,178 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-03 13:33:19,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:33:19,181 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 37 statements into 8 equivalence classes. [2025-03-03 13:33:19,185 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) and asserted 37 of 37 statements. [2025-03-03 13:33:19,185 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2025-03-03 13:33:19,185 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:33:19,330 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 58 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:19,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:33:19,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865190452] [2025-03-03 13:33:19,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865190452] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:33:19,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882518980] [2025-03-03 13:33:19,330 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-03 13:33:19,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:33:19,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:33:19,332 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:33:19,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2025-03-03 13:33:19,362 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 37 statements into 8 equivalence classes. [2025-03-03 13:33:19,374 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) and asserted 37 of 37 statements. [2025-03-03 13:33:19,374 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2025-03-03 13:33:19,374 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:33:19,374 INFO L256 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-03-03 13:33:19,375 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:33:19,568 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 77 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:19,568 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:33:19,700 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 77 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:19,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882518980] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:33:19,700 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:33:19,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 35 [2025-03-03 13:33:19,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401106305] [2025-03-03 13:33:19,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:33:19,700 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2025-03-03 13:33:19,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:33:19,701 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2025-03-03 13:33:19,701 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=975, Unknown=0, NotChecked=0, Total=1190 [2025-03-03 13:33:19,701 INFO L87 Difference]: Start difference. First operand 46 states and 55 transitions. Second operand has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 35 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:19,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:33:19,806 INFO L93 Difference]: Finished difference Result 88 states and 98 transitions. [2025-03-03 13:33:19,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-03-03 13:33:19,806 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 35 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2025-03-03 13:33:19,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:33:19,807 INFO L225 Difference]: With dead ends: 88 [2025-03-03 13:33:19,807 INFO L226 Difference]: Without dead ends: 61 [2025-03-03 13:33:19,807 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 44 SyntacticMatches, 14 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=220, Invalid=1040, Unknown=0, NotChecked=0, Total=1260 [2025-03-03 13:33:19,807 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:33:19,808 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 105 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:33:19,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2025-03-03 13:33:19,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 46. [2025-03-03 13:33:19,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.2222222222222223) internal successors, (55), 45 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:19,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 55 transitions. [2025-03-03 13:33:19,816 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 55 transitions. Word has length 37 [2025-03-03 13:33:19,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:33:19,816 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 55 transitions. [2025-03-03 13:33:19,816 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 35 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:19,816 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 55 transitions. [2025-03-03 13:33:19,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2025-03-03 13:33:19,816 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:33:19,816 INFO L218 NwaCegarLoop]: trace histogram [8, 7, 7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:33:19,822 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2025-03-03 13:33:20,017 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2025-03-03 13:33:20,017 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:33:20,017 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:33:20,017 INFO L85 PathProgramCache]: Analyzing trace with hash -1073610223, now seen corresponding path program 19 times [2025-03-03 13:33:20,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:33:20,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899320428] [2025-03-03 13:33:20,017 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-03 13:33:20,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:33:20,020 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-03-03 13:33:20,022 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-03-03 13:33:20,022 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:33:20,022 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:33:20,142 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 58 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:20,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:33:20,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899320428] [2025-03-03 13:33:20,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899320428] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:33:20,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823246920] [2025-03-03 13:33:20,143 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-03 13:33:20,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:33:20,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:33:20,145 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:33:20,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2025-03-03 13:33:20,176 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-03-03 13:33:20,186 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-03-03 13:33:20,186 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:33:20,186 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:33:20,187 INFO L256 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-03-03 13:33:20,187 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:33:20,386 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 77 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:20,386 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:33:20,492 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 77 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:20,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823246920] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:33:20,492 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:33:20,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 34 [2025-03-03 13:33:20,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078738560] [2025-03-03 13:33:20,492 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:33:20,492 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2025-03-03 13:33:20,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:33:20,493 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2025-03-03 13:33:20,493 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=919, Unknown=0, NotChecked=0, Total=1122 [2025-03-03 13:33:20,493 INFO L87 Difference]: Start difference. First operand 46 states and 55 transitions. Second operand has 34 states, 34 states have (on average 2.176470588235294) internal successors, (74), 34 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:20,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:33:20,585 INFO L93 Difference]: Finished difference Result 89 states and 99 transitions. [2025-03-03 13:33:20,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-03-03 13:33:20,585 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.176470588235294) internal successors, (74), 34 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2025-03-03 13:33:20,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:33:20,586 INFO L225 Difference]: With dead ends: 89 [2025-03-03 13:33:20,586 INFO L226 Difference]: Without dead ends: 62 [2025-03-03 13:33:20,586 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 45 SyntacticMatches, 14 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=208, Invalid=982, Unknown=0, NotChecked=0, Total=1190 [2025-03-03 13:33:20,587 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:33:20,587 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 109 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:33:20,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2025-03-03 13:33:20,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 46. [2025-03-03 13:33:20,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.2222222222222223) internal successors, (55), 45 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:20,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 55 transitions. [2025-03-03 13:33:20,594 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 55 transitions. Word has length 37 [2025-03-03 13:33:20,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:33:20,595 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 55 transitions. [2025-03-03 13:33:20,595 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.176470588235294) internal successors, (74), 34 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:20,595 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 55 transitions. [2025-03-03 13:33:20,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2025-03-03 13:33:20,595 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:33:20,595 INFO L218 NwaCegarLoop]: trace histogram [8, 7, 7, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:33:20,601 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2025-03-03 13:33:20,795 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2025-03-03 13:33:20,795 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:33:20,796 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:33:20,796 INFO L85 PathProgramCache]: Analyzing trace with hash -635245071, now seen corresponding path program 20 times [2025-03-03 13:33:20,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:33:20,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191559034] [2025-03-03 13:33:20,796 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:33:20,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:33:20,799 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 37 statements into 2 equivalence classes. [2025-03-03 13:33:20,801 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 37 of 37 statements. [2025-03-03 13:33:20,802 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:33:20,802 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:33:20,947 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 58 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:20,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:33:20,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191559034] [2025-03-03 13:33:20,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191559034] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:33:20,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637308402] [2025-03-03 13:33:20,948 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:33:20,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:33:20,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:33:20,950 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:33:20,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2025-03-03 13:33:20,985 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 37 statements into 2 equivalence classes. [2025-03-03 13:33:20,997 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 37 of 37 statements. [2025-03-03 13:33:20,997 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:33:20,997 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:33:20,998 INFO L256 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-03-03 13:33:20,999 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:33:21,197 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 77 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:21,198 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:33:21,329 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 77 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:21,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637308402] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:33:21,329 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:33:21,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 33 [2025-03-03 13:33:21,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472221888] [2025-03-03 13:33:21,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:33:21,329 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2025-03-03 13:33:21,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:33:21,330 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2025-03-03 13:33:21,330 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=861, Unknown=0, NotChecked=0, Total=1056 [2025-03-03 13:33:21,330 INFO L87 Difference]: Start difference. First operand 46 states and 55 transitions. Second operand has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 33 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:21,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:33:21,484 INFO L93 Difference]: Finished difference Result 88 states and 98 transitions. [2025-03-03 13:33:21,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-03-03 13:33:21,485 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 33 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2025-03-03 13:33:21,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:33:21,485 INFO L225 Difference]: With dead ends: 88 [2025-03-03 13:33:21,485 INFO L226 Difference]: Without dead ends: 61 [2025-03-03 13:33:21,486 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 46 SyntacticMatches, 14 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=200, Invalid=922, Unknown=0, NotChecked=0, Total=1122 [2025-03-03 13:33:21,486 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:33:21,486 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 131 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:33:21,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2025-03-03 13:33:21,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 46. [2025-03-03 13:33:21,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.2222222222222223) internal successors, (55), 45 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:21,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 55 transitions. [2025-03-03 13:33:21,502 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 55 transitions. Word has length 37 [2025-03-03 13:33:21,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:33:21,502 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 55 transitions. [2025-03-03 13:33:21,502 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 33 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:21,502 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 55 transitions. [2025-03-03 13:33:21,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2025-03-03 13:33:21,502 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:33:21,502 INFO L218 NwaCegarLoop]: trace histogram [8, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:33:21,508 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2025-03-03 13:33:21,703 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2025-03-03 13:33:21,703 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:33:21,704 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:33:21,704 INFO L85 PathProgramCache]: Analyzing trace with hash 71632401, now seen corresponding path program 21 times [2025-03-03 13:33:21,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:33:21,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948368307] [2025-03-03 13:33:21,704 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 13:33:21,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:33:21,707 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 37 statements into 8 equivalence classes. [2025-03-03 13:33:21,711 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) and asserted 37 of 37 statements. [2025-03-03 13:33:21,711 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2025-03-03 13:33:21,711 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:33:21,852 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 58 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:21,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:33:21,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948368307] [2025-03-03 13:33:21,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948368307] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:33:21,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579250835] [2025-03-03 13:33:21,852 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 13:33:21,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:33:21,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:33:21,855 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:33:21,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2025-03-03 13:33:21,889 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 37 statements into 8 equivalence classes. [2025-03-03 13:33:21,904 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) and asserted 37 of 37 statements. [2025-03-03 13:33:21,904 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2025-03-03 13:33:21,904 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:33:21,905 INFO L256 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-03-03 13:33:21,906 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:33:22,093 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 77 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:22,093 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:33:22,199 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 77 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:22,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579250835] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:33:22,200 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:33:22,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 32 [2025-03-03 13:33:22,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779781702] [2025-03-03 13:33:22,200 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:33:22,200 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2025-03-03 13:33:22,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:33:22,200 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2025-03-03 13:33:22,200 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=801, Unknown=0, NotChecked=0, Total=992 [2025-03-03 13:33:22,201 INFO L87 Difference]: Start difference. First operand 46 states and 55 transitions. Second operand has 32 states, 32 states have (on average 2.25) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:22,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:33:22,289 INFO L93 Difference]: Finished difference Result 85 states and 95 transitions. [2025-03-03 13:33:22,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-03-03 13:33:22,289 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2025-03-03 13:33:22,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:33:22,290 INFO L225 Difference]: With dead ends: 85 [2025-03-03 13:33:22,290 INFO L226 Difference]: Without dead ends: 58 [2025-03-03 13:33:22,290 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 47 SyntacticMatches, 14 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 509 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=196, Invalid=860, Unknown=0, NotChecked=0, Total=1056 [2025-03-03 13:33:22,290 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:33:22,290 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 85 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:33:22,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2025-03-03 13:33:22,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 46. [2025-03-03 13:33:22,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.2222222222222223) internal successors, (55), 45 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:22,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 55 transitions. [2025-03-03 13:33:22,299 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 55 transitions. Word has length 37 [2025-03-03 13:33:22,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:33:22,299 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 55 transitions. [2025-03-03 13:33:22,300 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:22,300 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 55 transitions. [2025-03-03 13:33:22,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2025-03-03 13:33:22,300 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:33:22,300 INFO L218 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:33:22,306 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2025-03-03 13:33:22,504 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:33:22,504 INFO L396 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:33:22,504 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:33:22,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1064266225, now seen corresponding path program 7 times [2025-03-03 13:33:22,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:33:22,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524672942] [2025-03-03 13:33:22,505 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-03 13:33:22,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:33:22,508 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-03-03 13:33:22,510 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-03-03 13:33:22,510 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:33:22,510 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:33:22,659 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 58 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:22,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:33:22,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524672942] [2025-03-03 13:33:22,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524672942] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:33:22,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799365229] [2025-03-03 13:33:22,659 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-03 13:33:22,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:33:22,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:33:22,661 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:33:22,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2025-03-03 13:33:22,693 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-03-03 13:33:22,703 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-03-03 13:33:22,703 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:33:22,703 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:33:22,704 INFO L256 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-03-03 13:33:22,704 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:33:22,916 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 77 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:22,916 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:33:23,017 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 77 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:23,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799365229] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:33:23,017 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:33:23,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 31 [2025-03-03 13:33:23,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178213562] [2025-03-03 13:33:23,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:33:23,018 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2025-03-03 13:33:23,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:33:23,018 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2025-03-03 13:33:23,018 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=739, Unknown=0, NotChecked=0, Total=930 [2025-03-03 13:33:23,018 INFO L87 Difference]: Start difference. First operand 46 states and 55 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:23,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:33:23,090 INFO L93 Difference]: Finished difference Result 81 states and 92 transitions. [2025-03-03 13:33:23,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-03-03 13:33:23,090 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2025-03-03 13:33:23,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:33:23,090 INFO L225 Difference]: With dead ends: 81 [2025-03-03 13:33:23,090 INFO L226 Difference]: Without dead ends: 54 [2025-03-03 13:33:23,091 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 48 SyntacticMatches, 14 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=196, Invalid=796, Unknown=0, NotChecked=0, Total=992 [2025-03-03 13:33:23,091 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 13:33:23,091 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 91 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 13:33:23,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2025-03-03 13:33:23,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 47. [2025-03-03 13:33:23,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.2391304347826086) internal successors, (57), 46 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:23,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 57 transitions. [2025-03-03 13:33:23,099 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 57 transitions. Word has length 37 [2025-03-03 13:33:23,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:33:23,100 INFO L471 AbstractCegarLoop]: Abstraction has 47 states and 57 transitions. [2025-03-03 13:33:23,100 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:23,100 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 57 transitions. [2025-03-03 13:33:23,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2025-03-03 13:33:23,100 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:33:23,100 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:33:23,106 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2025-03-03 13:33:23,300 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:33:23,300 INFO L396 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:33:23,301 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:33:23,301 INFO L85 PathProgramCache]: Analyzing trace with hash -1331070593, now seen corresponding path program 14 times [2025-03-03 13:33:23,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:33:23,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813931361] [2025-03-03 13:33:23,301 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:33:23,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:33:23,304 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 38 statements into 2 equivalence classes. [2025-03-03 13:33:23,306 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 38 of 38 statements. [2025-03-03 13:33:23,306 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:33:23,306 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:33:23,386 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 28 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:23,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:33:23,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813931361] [2025-03-03 13:33:23,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813931361] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:33:23,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434189315] [2025-03-03 13:33:23,386 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:33:23,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:33:23,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:33:23,388 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:33:23,389 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2025-03-03 13:33:23,422 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 38 statements into 2 equivalence classes. [2025-03-03 13:33:23,432 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 38 of 38 statements. [2025-03-03 13:33:23,432 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:33:23,432 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:33:23,433 INFO L256 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-03-03 13:33:23,433 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:33:23,471 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 36 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:23,471 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:33:23,556 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 36 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:23,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434189315] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:33:23,556 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:33:23,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 14 [2025-03-03 13:33:23,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95207971] [2025-03-03 13:33:23,556 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:33:23,556 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-03 13:33:23,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:33:23,557 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-03 13:33:23,557 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2025-03-03 13:33:23,557 INFO L87 Difference]: Start difference. First operand 47 states and 57 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:23,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:33:23,643 INFO L93 Difference]: Finished difference Result 58 states and 68 transitions. [2025-03-03 13:33:23,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-03-03 13:33:23,643 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2025-03-03 13:33:23,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:33:23,644 INFO L225 Difference]: With dead ends: 58 [2025-03-03 13:33:23,644 INFO L226 Difference]: Without dead ends: 56 [2025-03-03 13:33:23,644 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 64 SyntacticMatches, 17 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=167, Invalid=295, Unknown=0, NotChecked=0, Total=462 [2025-03-03 13:33:23,644 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 16 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 13:33:23,644 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 94 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 13:33:23,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2025-03-03 13:33:23,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 50. [2025-03-03 13:33:23,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.2244897959183674) internal successors, (60), 49 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:23,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2025-03-03 13:33:23,653 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 38 [2025-03-03 13:33:23,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:33:23,653 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2025-03-03 13:33:23,653 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:23,653 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2025-03-03 13:33:23,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2025-03-03 13:33:23,653 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:33:23,653 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:33:23,659 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2025-03-03 13:33:23,853 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2025-03-03 13:33:23,854 INFO L396 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:33:23,854 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:33:23,854 INFO L85 PathProgramCache]: Analyzing trace with hash 1509848939, now seen corresponding path program 15 times [2025-03-03 13:33:23,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:33:23,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670563332] [2025-03-03 13:33:23,854 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 13:33:23,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:33:23,857 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 41 statements into 9 equivalence classes. [2025-03-03 13:33:23,861 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) and asserted 41 of 41 statements. [2025-03-03 13:33:23,861 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2025-03-03 13:33:23,861 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:33:24,053 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 78 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:24,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:33:24,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670563332] [2025-03-03 13:33:24,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670563332] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:33:24,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060684669] [2025-03-03 13:33:24,053 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 13:33:24,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:33:24,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:33:24,072 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:33:24,074 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2025-03-03 13:33:24,111 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 41 statements into 9 equivalence classes. [2025-03-03 13:33:24,126 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) and asserted 41 of 41 statements. [2025-03-03 13:33:24,126 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2025-03-03 13:33:24,126 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:33:24,127 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-03-03 13:33:24,128 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:33:24,446 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 100 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:24,446 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:33:24,578 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 100 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:24,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060684669] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:33:24,579 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:33:24,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 42 [2025-03-03 13:33:24,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250787794] [2025-03-03 13:33:24,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:33:24,579 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2025-03-03 13:33:24,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:33:24,579 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2025-03-03 13:33:24,580 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=335, Invalid=1387, Unknown=0, NotChecked=0, Total=1722 [2025-03-03 13:33:24,580 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand has 42 states, 42 states have (on average 2.0238095238095237) internal successors, (85), 42 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:24,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:33:24,661 INFO L93 Difference]: Finished difference Result 88 states and 99 transitions. [2025-03-03 13:33:24,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-03-03 13:33:24,661 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.0238095238095237) internal successors, (85), 42 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2025-03-03 13:33:24,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:33:24,662 INFO L225 Difference]: With dead ends: 88 [2025-03-03 13:33:24,662 INFO L226 Difference]: Without dead ends: 58 [2025-03-03 13:33:24,662 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 45 SyntacticMatches, 16 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1094 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=340, Invalid=1466, Unknown=0, NotChecked=0, Total=1806 [2025-03-03 13:33:24,662 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:33:24,662 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 94 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:33:24,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2025-03-03 13:33:24,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 51. [2025-03-03 13:33:24,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.22) internal successors, (61), 50 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:24,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2025-03-03 13:33:24,673 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 41 [2025-03-03 13:33:24,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:33:24,673 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2025-03-03 13:33:24,673 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.0238095238095237) internal successors, (85), 42 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:24,673 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2025-03-03 13:33:24,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2025-03-03 13:33:24,673 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:33:24,673 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:33:24,679 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2025-03-03 13:33:24,873 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2025-03-03 13:33:24,873 INFO L396 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:33:24,874 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:33:24,874 INFO L85 PathProgramCache]: Analyzing trace with hash -505052341, now seen corresponding path program 22 times [2025-03-03 13:33:24,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:33:24,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155822214] [2025-03-03 13:33:24,874 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 13:33:24,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:33:24,877 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 41 statements into 2 equivalence classes. [2025-03-03 13:33:24,880 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 41 of 41 statements. [2025-03-03 13:33:24,881 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-03 13:33:24,881 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:33:25,015 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 100 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:25,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:33:25,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155822214] [2025-03-03 13:33:25,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155822214] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:33:25,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581136049] [2025-03-03 13:33:25,015 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 13:33:25,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:33:25,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:33:25,017 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:33:25,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2025-03-03 13:33:25,052 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 41 statements into 2 equivalence classes. [2025-03-03 13:33:25,064 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 41 of 41 statements. [2025-03-03 13:33:25,064 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-03 13:33:25,064 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:33:25,064 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-03-03 13:33:25,065 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:33:25,335 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 100 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:25,335 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:33:25,447 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 100 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:25,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581136049] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:33:25,447 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:33:25,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 38 [2025-03-03 13:33:25,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976813271] [2025-03-03 13:33:25,447 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:33:25,447 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2025-03-03 13:33:25,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:33:25,447 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2025-03-03 13:33:25,448 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=1123, Unknown=0, NotChecked=0, Total=1406 [2025-03-03 13:33:25,448 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand has 38 states, 38 states have (on average 1.9736842105263157) internal successors, (75), 38 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:25,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:33:25,538 INFO L93 Difference]: Finished difference Result 94 states and 105 transitions. [2025-03-03 13:33:25,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-03-03 13:33:25,538 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.9736842105263157) internal successors, (75), 38 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2025-03-03 13:33:25,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:33:25,539 INFO L225 Difference]: With dead ends: 94 [2025-03-03 13:33:25,539 INFO L226 Difference]: Without dead ends: 64 [2025-03-03 13:33:25,539 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 47 SyntacticMatches, 18 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 808 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=283, Invalid=1123, Unknown=0, NotChecked=0, Total=1406 [2025-03-03 13:33:25,539 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:33:25,539 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 115 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:33:25,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2025-03-03 13:33:25,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 51. [2025-03-03 13:33:25,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.22) internal successors, (61), 50 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:25,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2025-03-03 13:33:25,551 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 41 [2025-03-03 13:33:25,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:33:25,551 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2025-03-03 13:33:25,551 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.9736842105263157) internal successors, (75), 38 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:25,551 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2025-03-03 13:33:25,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2025-03-03 13:33:25,551 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:33:25,551 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 8, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:33:25,557 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2025-03-03 13:33:25,752 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2025-03-03 13:33:25,752 INFO L396 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:33:25,752 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:33:25,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1124238485, now seen corresponding path program 23 times [2025-03-03 13:33:25,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:33:25,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599372187] [2025-03-03 13:33:25,752 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 13:33:25,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:33:25,755 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 41 statements into 9 equivalence classes. [2025-03-03 13:33:25,760 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) and asserted 41 of 41 statements. [2025-03-03 13:33:25,760 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2025-03-03 13:33:25,760 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:33:25,937 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 100 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:25,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:33:25,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599372187] [2025-03-03 13:33:25,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599372187] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:33:25,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025160504] [2025-03-03 13:33:25,938 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 13:33:25,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:33:25,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:33:25,940 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:33:25,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2025-03-03 13:33:25,978 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 41 statements into 9 equivalence classes. [2025-03-03 13:33:25,994 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) and asserted 41 of 41 statements. [2025-03-03 13:33:25,994 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2025-03-03 13:33:25,995 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:33:25,995 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-03-03 13:33:25,996 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:33:26,273 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 100 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:26,273 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:33:26,390 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 100 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:26,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025160504] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:33:26,390 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:33:26,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 37 [2025-03-03 13:33:26,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587669270] [2025-03-03 13:33:26,390 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:33:26,390 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2025-03-03 13:33:26,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:33:26,390 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2025-03-03 13:33:26,391 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=1071, Unknown=0, NotChecked=0, Total=1332 [2025-03-03 13:33:26,391 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand has 37 states, 37 states have (on average 2.0) internal successors, (74), 37 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:26,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:33:26,489 INFO L93 Difference]: Finished difference Result 98 states and 109 transitions. [2025-03-03 13:33:26,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-03-03 13:33:26,489 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.0) internal successors, (74), 37 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2025-03-03 13:33:26,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:33:26,490 INFO L225 Difference]: With dead ends: 98 [2025-03-03 13:33:26,490 INFO L226 Difference]: Without dead ends: 68 [2025-03-03 13:33:26,490 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 48 SyntacticMatches, 18 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 744 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=261, Invalid=1071, Unknown=0, NotChecked=0, Total=1332 [2025-03-03 13:33:26,490 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:33:26,490 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 110 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:33:26,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2025-03-03 13:33:26,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 51. [2025-03-03 13:33:26,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.22) internal successors, (61), 50 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:26,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2025-03-03 13:33:26,502 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 41 [2025-03-03 13:33:26,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:33:26,503 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2025-03-03 13:33:26,503 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.0) internal successors, (74), 37 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:26,503 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2025-03-03 13:33:26,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2025-03-03 13:33:26,503 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:33:26,503 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:33:26,508 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2025-03-03 13:33:26,703 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:33:26,704 INFO L396 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:33:26,704 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:33:26,704 INFO L85 PathProgramCache]: Analyzing trace with hash 1626734411, now seen corresponding path program 24 times [2025-03-03 13:33:26,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:33:26,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868230065] [2025-03-03 13:33:26,704 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-03 13:33:26,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:33:26,707 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 41 statements into 9 equivalence classes. [2025-03-03 13:33:26,712 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) and asserted 41 of 41 statements. [2025-03-03 13:33:26,712 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2025-03-03 13:33:26,712 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:33:26,854 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 78 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:26,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:33:26,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868230065] [2025-03-03 13:33:26,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868230065] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:33:26,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106243386] [2025-03-03 13:33:26,854 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-03 13:33:26,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:33:26,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:33:26,856 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:33:26,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2025-03-03 13:33:26,898 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 41 statements into 9 equivalence classes. [2025-03-03 13:33:26,912 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) and asserted 41 of 41 statements. [2025-03-03 13:33:26,912 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2025-03-03 13:33:26,912 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:33:26,913 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-03-03 13:33:26,914 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:33:27,147 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 100 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:27,147 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:33:27,293 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 100 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:27,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106243386] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:33:27,293 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:33:27,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 39 [2025-03-03 13:33:27,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662833527] [2025-03-03 13:33:27,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:33:27,294 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2025-03-03 13:33:27,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:33:27,294 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2025-03-03 13:33:27,294 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=1216, Unknown=0, NotChecked=0, Total=1482 [2025-03-03 13:33:27,294 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand has 39 states, 39 states have (on average 2.128205128205128) internal successors, (83), 39 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:27,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:33:27,430 INFO L93 Difference]: Finished difference Result 100 states and 111 transitions. [2025-03-03 13:33:27,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-03-03 13:33:27,431 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.128205128205128) internal successors, (83), 39 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2025-03-03 13:33:27,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:33:27,431 INFO L225 Difference]: With dead ends: 100 [2025-03-03 13:33:27,431 INFO L226 Difference]: Without dead ends: 70 [2025-03-03 13:33:27,431 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 48 SyntacticMatches, 16 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 897 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=271, Invalid=1289, Unknown=0, NotChecked=0, Total=1560 [2025-03-03 13:33:27,432 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:33:27,432 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 167 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:33:27,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2025-03-03 13:33:27,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 51. [2025-03-03 13:33:27,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.22) internal successors, (61), 50 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:27,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2025-03-03 13:33:27,446 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 41 [2025-03-03 13:33:27,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:33:27,446 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2025-03-03 13:33:27,446 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.128205128205128) internal successors, (83), 39 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:27,446 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2025-03-03 13:33:27,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2025-03-03 13:33:27,446 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:33:27,446 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:33:27,452 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2025-03-03 13:33:27,647 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2025-03-03 13:33:27,647 INFO L396 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:33:27,647 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:33:27,647 INFO L85 PathProgramCache]: Analyzing trace with hash 468549483, now seen corresponding path program 25 times [2025-03-03 13:33:27,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:33:27,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96402408] [2025-03-03 13:33:27,647 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-03 13:33:27,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:33:27,651 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 41 statements into 1 equivalence classes. [2025-03-03 13:33:27,653 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 41 of 41 statements. [2025-03-03 13:33:27,653 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:33:27,653 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:33:27,800 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 78 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:27,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:33:27,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96402408] [2025-03-03 13:33:27,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96402408] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:33:27,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31823343] [2025-03-03 13:33:27,800 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-03 13:33:27,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:33:27,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:33:27,802 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:33:27,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2025-03-03 13:33:27,839 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 41 statements into 1 equivalence classes. [2025-03-03 13:33:27,850 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 41 of 41 statements. [2025-03-03 13:33:27,850 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:33:27,850 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:33:27,850 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-03-03 13:33:27,851 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:33:28,083 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 100 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:28,084 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:33:28,211 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 100 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:28,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31823343] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:33:28,211 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:33:28,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 38 [2025-03-03 13:33:28,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122563948] [2025-03-03 13:33:28,211 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:33:28,211 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2025-03-03 13:33:28,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:33:28,212 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2025-03-03 13:33:28,212 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=1155, Unknown=0, NotChecked=0, Total=1406 [2025-03-03 13:33:28,212 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand has 38 states, 38 states have (on average 2.1578947368421053) internal successors, (82), 38 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:28,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:33:28,331 INFO L93 Difference]: Finished difference Result 101 states and 112 transitions. [2025-03-03 13:33:28,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-03-03 13:33:28,331 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.1578947368421053) internal successors, (82), 38 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2025-03-03 13:33:28,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:33:28,332 INFO L225 Difference]: With dead ends: 101 [2025-03-03 13:33:28,332 INFO L226 Difference]: Without dead ends: 71 [2025-03-03 13:33:28,332 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 49 SyntacticMatches, 16 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 825 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=256, Invalid=1226, Unknown=0, NotChecked=0, Total=1482 [2025-03-03 13:33:28,332 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:33:28,332 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 136 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:33:28,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2025-03-03 13:33:28,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 51. [2025-03-03 13:33:28,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.22) internal successors, (61), 50 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:28,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2025-03-03 13:33:28,345 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 41 [2025-03-03 13:33:28,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:33:28,345 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2025-03-03 13:33:28,345 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.1578947368421053) internal successors, (82), 38 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:28,346 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2025-03-03 13:33:28,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2025-03-03 13:33:28,346 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:33:28,346 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:33:28,351 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2025-03-03 13:33:28,546 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2025-03-03 13:33:28,546 INFO L396 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:33:28,546 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:33:28,547 INFO L85 PathProgramCache]: Analyzing trace with hash 569736011, now seen corresponding path program 26 times [2025-03-03 13:33:28,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:33:28,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14928048] [2025-03-03 13:33:28,547 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:33:28,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:33:28,550 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 41 statements into 2 equivalence classes. [2025-03-03 13:33:28,552 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 41 of 41 statements. [2025-03-03 13:33:28,552 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:33:28,552 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:33:28,705 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 78 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:28,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:33:28,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14928048] [2025-03-03 13:33:28,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14928048] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:33:28,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757587151] [2025-03-03 13:33:28,705 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:33:28,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:33:28,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:33:28,707 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:33:28,708 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2025-03-03 13:33:28,744 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 41 statements into 2 equivalence classes. [2025-03-03 13:33:28,755 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 41 of 41 statements. [2025-03-03 13:33:28,755 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:33:28,755 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:33:28,755 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-03-03 13:33:28,756 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:33:28,979 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 100 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:28,980 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:33:29,125 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 100 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:29,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757587151] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:33:29,126 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:33:29,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 37 [2025-03-03 13:33:29,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272234821] [2025-03-03 13:33:29,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:33:29,126 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2025-03-03 13:33:29,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:33:29,126 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2025-03-03 13:33:29,126 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=1092, Unknown=0, NotChecked=0, Total=1332 [2025-03-03 13:33:29,127 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand has 37 states, 37 states have (on average 2.189189189189189) internal successors, (81), 37 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:29,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:33:29,251 INFO L93 Difference]: Finished difference Result 101 states and 112 transitions. [2025-03-03 13:33:29,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-03-03 13:33:29,251 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.189189189189189) internal successors, (81), 37 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2025-03-03 13:33:29,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:33:29,251 INFO L225 Difference]: With dead ends: 101 [2025-03-03 13:33:29,251 INFO L226 Difference]: Without dead ends: 71 [2025-03-03 13:33:29,252 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 50 SyntacticMatches, 16 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 755 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=245, Invalid=1161, Unknown=0, NotChecked=0, Total=1406 [2025-03-03 13:33:29,252 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:33:29,252 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 141 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:33:29,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2025-03-03 13:33:29,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 51. [2025-03-03 13:33:29,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.22) internal successors, (61), 50 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:29,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2025-03-03 13:33:29,265 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 41 [2025-03-03 13:33:29,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:33:29,265 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2025-03-03 13:33:29,265 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.189189189189189) internal successors, (81), 37 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:29,265 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2025-03-03 13:33:29,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2025-03-03 13:33:29,265 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:33:29,265 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 8, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:33:29,271 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2025-03-03 13:33:29,465 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2025-03-03 13:33:29,466 INFO L396 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:33:29,466 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:33:29,466 INFO L85 PathProgramCache]: Analyzing trace with hash -1089567893, now seen corresponding path program 27 times [2025-03-03 13:33:29,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:33:29,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993946834] [2025-03-03 13:33:29,466 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 13:33:29,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:33:29,470 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 41 statements into 9 equivalence classes. [2025-03-03 13:33:29,475 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) and asserted 41 of 41 statements. [2025-03-03 13:33:29,475 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2025-03-03 13:33:29,475 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:33:29,616 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 78 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:29,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:33:29,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993946834] [2025-03-03 13:33:29,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993946834] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:33:29,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875655904] [2025-03-03 13:33:29,616 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 13:33:29,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:33:29,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:33:29,618 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:33:29,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2025-03-03 13:33:29,655 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 41 statements into 9 equivalence classes. [2025-03-03 13:33:29,669 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) and asserted 41 of 41 statements. [2025-03-03 13:33:29,669 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2025-03-03 13:33:29,669 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:33:29,669 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-03-03 13:33:29,670 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:33:29,876 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 100 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:29,876 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:33:29,998 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 100 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:29,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875655904] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:33:29,998 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:33:29,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 36 [2025-03-03 13:33:29,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301366409] [2025-03-03 13:33:29,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:33:29,998 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2025-03-03 13:33:29,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:33:29,999 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2025-03-03 13:33:29,999 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=1027, Unknown=0, NotChecked=0, Total=1260 [2025-03-03 13:33:29,999 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand has 36 states, 36 states have (on average 2.2222222222222223) internal successors, (80), 36 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:30,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:33:30,103 INFO L93 Difference]: Finished difference Result 99 states and 110 transitions. [2025-03-03 13:33:30,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-03-03 13:33:30,103 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.2222222222222223) internal successors, (80), 36 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2025-03-03 13:33:30,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:33:30,103 INFO L225 Difference]: With dead ends: 99 [2025-03-03 13:33:30,103 INFO L226 Difference]: Without dead ends: 69 [2025-03-03 13:33:30,104 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 51 SyntacticMatches, 16 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 687 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=238, Invalid=1094, Unknown=0, NotChecked=0, Total=1332 [2025-03-03 13:33:30,104 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:33:30,104 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 87 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:33:30,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2025-03-03 13:33:30,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 51. [2025-03-03 13:33:30,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.22) internal successors, (61), 50 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:30,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2025-03-03 13:33:30,117 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 41 [2025-03-03 13:33:30,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:33:30,117 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2025-03-03 13:33:30,117 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.2222222222222223) internal successors, (80), 36 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:30,117 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2025-03-03 13:33:30,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2025-03-03 13:33:30,117 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:33:30,117 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:33:30,124 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2025-03-03 13:33:30,318 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2025-03-03 13:33:30,318 INFO L396 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:33:30,318 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:33:30,318 INFO L85 PathProgramCache]: Analyzing trace with hash -727451829, now seen corresponding path program 28 times [2025-03-03 13:33:30,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:33:30,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158706240] [2025-03-03 13:33:30,318 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 13:33:30,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:33:30,321 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 41 statements into 2 equivalence classes. [2025-03-03 13:33:30,324 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 41 of 41 statements. [2025-03-03 13:33:30,324 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-03 13:33:30,324 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:33:30,463 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 100 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:30,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:33:30,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158706240] [2025-03-03 13:33:30,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158706240] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:33:30,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947271225] [2025-03-03 13:33:30,463 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 13:33:30,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:33:30,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:33:30,465 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:33:30,466 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2025-03-03 13:33:30,506 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 41 statements into 2 equivalence classes. [2025-03-03 13:33:30,518 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 41 of 41 statements. [2025-03-03 13:33:30,518 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-03 13:33:30,518 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:33:30,519 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-03-03 13:33:30,519 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:33:30,712 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 100 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:30,713 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:33:30,818 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 100 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:30,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947271225] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:33:30,818 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:33:30,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 32 [2025-03-03 13:33:30,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031976149] [2025-03-03 13:33:30,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:33:30,818 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2025-03-03 13:33:30,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:33:30,818 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2025-03-03 13:33:30,818 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=781, Unknown=0, NotChecked=0, Total=992 [2025-03-03 13:33:30,819 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand has 32 states, 32 states have (on average 2.15625) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:30,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:33:30,919 INFO L93 Difference]: Finished difference Result 95 states and 106 transitions. [2025-03-03 13:33:30,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-03-03 13:33:30,920 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2025-03-03 13:33:30,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:33:30,920 INFO L225 Difference]: With dead ends: 95 [2025-03-03 13:33:30,920 INFO L226 Difference]: Without dead ends: 65 [2025-03-03 13:33:30,920 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 53 SyntacticMatches, 18 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=211, Invalid=781, Unknown=0, NotChecked=0, Total=992 [2025-03-03 13:33:30,920 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:33:30,921 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 130 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:33:30,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2025-03-03 13:33:30,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 51. [2025-03-03 13:33:30,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.22) internal successors, (61), 50 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:30,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2025-03-03 13:33:30,934 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 41 [2025-03-03 13:33:30,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:33:30,934 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2025-03-03 13:33:30,934 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:30,934 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2025-03-03 13:33:30,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2025-03-03 13:33:30,934 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:33:30,934 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:33:30,943 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2025-03-03 13:33:31,135 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:33:31,135 INFO L396 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:33:31,135 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:33:31,135 INFO L85 PathProgramCache]: Analyzing trace with hash -23034005, now seen corresponding path program 8 times [2025-03-03 13:33:31,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:33:31,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597937767] [2025-03-03 13:33:31,135 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:33:31,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:33:31,138 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 41 statements into 2 equivalence classes. [2025-03-03 13:33:31,141 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 41 of 41 statements. [2025-03-03 13:33:31,141 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:33:31,141 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:33:31,278 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 78 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:31,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:33:31,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597937767] [2025-03-03 13:33:31,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597937767] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:33:31,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116961213] [2025-03-03 13:33:31,278 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:33:31,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:33:31,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:33:31,280 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:33:31,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2025-03-03 13:33:31,319 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 41 statements into 2 equivalence classes. [2025-03-03 13:33:31,330 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 41 of 41 statements. [2025-03-03 13:33:31,330 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:33:31,330 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:33:31,330 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-03-03 13:33:31,331 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:33:31,520 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 100 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:31,520 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:33:31,643 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 100 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:31,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116961213] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:33:31,644 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:33:31,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 34 [2025-03-03 13:33:31,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661320870] [2025-03-03 13:33:31,644 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:33:31,644 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2025-03-03 13:33:31,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:33:31,644 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2025-03-03 13:33:31,644 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=891, Unknown=0, NotChecked=0, Total=1122 [2025-03-03 13:33:31,644 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand has 34 states, 34 states have (on average 2.264705882352941) internal successors, (77), 34 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:31,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:33:31,748 INFO L93 Difference]: Finished difference Result 90 states and 102 transitions. [2025-03-03 13:33:31,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-03-03 13:33:31,748 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.264705882352941) internal successors, (77), 34 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2025-03-03 13:33:31,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:33:31,749 INFO L225 Difference]: With dead ends: 90 [2025-03-03 13:33:31,749 INFO L226 Difference]: Without dead ends: 60 [2025-03-03 13:33:31,749 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 53 SyntacticMatches, 16 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 543 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=236, Invalid=954, Unknown=0, NotChecked=0, Total=1190 [2025-03-03 13:33:31,749 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:33:31,749 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 112 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:33:31,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2025-03-03 13:33:31,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 52. [2025-03-03 13:33:31,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.2352941176470589) internal successors, (63), 51 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:31,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 63 transitions. [2025-03-03 13:33:31,763 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 63 transitions. Word has length 41 [2025-03-03 13:33:31,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:33:31,763 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 63 transitions. [2025-03-03 13:33:31,763 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.264705882352941) internal successors, (77), 34 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:31,764 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 63 transitions. [2025-03-03 13:33:31,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2025-03-03 13:33:31,764 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:33:31,764 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:33:31,770 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2025-03-03 13:33:31,964 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2025-03-03 13:33:31,964 INFO L396 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:33:31,965 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:33:31,965 INFO L85 PathProgramCache]: Analyzing trace with hash -200306727, now seen corresponding path program 16 times [2025-03-03 13:33:31,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:33:31,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348321652] [2025-03-03 13:33:31,965 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 13:33:31,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:33:31,968 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 42 statements into 2 equivalence classes. [2025-03-03 13:33:31,971 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 42 of 42 statements. [2025-03-03 13:33:31,971 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-03 13:33:31,971 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:33:32,056 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 45 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:32,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:33:32,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348321652] [2025-03-03 13:33:32,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348321652] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:33:32,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397093274] [2025-03-03 13:33:32,056 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 13:33:32,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:33:32,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:33:32,058 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:33:32,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2025-03-03 13:33:32,097 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 42 statements into 2 equivalence classes. [2025-03-03 13:33:32,109 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 42 of 42 statements. [2025-03-03 13:33:32,109 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-03 13:33:32,109 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:33:32,109 INFO L256 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-03-03 13:33:32,110 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:33:32,141 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 45 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:32,142 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:33:32,247 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 45 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:32,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397093274] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:33:32,247 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:33:32,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 14 [2025-03-03 13:33:32,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664048910] [2025-03-03 13:33:32,247 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:33:32,247 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-03 13:33:32,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:33:32,247 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-03 13:33:32,248 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2025-03-03 13:33:32,248 INFO L87 Difference]: Start difference. First operand 52 states and 63 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:32,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:33:32,350 INFO L93 Difference]: Finished difference Result 63 states and 74 transitions. [2025-03-03 13:33:32,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-03-03 13:33:32,350 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2025-03-03 13:33:32,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:33:32,351 INFO L225 Difference]: With dead ends: 63 [2025-03-03 13:33:32,351 INFO L226 Difference]: Without dead ends: 61 [2025-03-03 13:33:32,351 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 73 SyntacticMatches, 18 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=197, Invalid=309, Unknown=0, NotChecked=0, Total=506 [2025-03-03 13:33:32,351 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 17 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:33:32,351 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 71 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:33:32,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2025-03-03 13:33:32,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 55. [2025-03-03 13:33:32,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.2222222222222223) internal successors, (66), 54 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:32,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 66 transitions. [2025-03-03 13:33:32,365 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 66 transitions. Word has length 42 [2025-03-03 13:33:32,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:33:32,366 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 66 transitions. [2025-03-03 13:33:32,366 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:32,366 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 66 transitions. [2025-03-03 13:33:32,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2025-03-03 13:33:32,366 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:33:32,366 INFO L218 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:33:32,372 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2025-03-03 13:33:32,566 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:33:32,566 INFO L396 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:33:32,567 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:33:32,567 INFO L85 PathProgramCache]: Analyzing trace with hash -1627288879, now seen corresponding path program 17 times [2025-03-03 13:33:32,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:33:32,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181002214] [2025-03-03 13:33:32,567 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 13:33:32,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:33:32,571 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 45 statements into 10 equivalence classes. [2025-03-03 13:33:32,577 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) and asserted 45 of 45 statements. [2025-03-03 13:33:32,577 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2025-03-03 13:33:32,577 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:33:32,746 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 126 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:32,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:33:32,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181002214] [2025-03-03 13:33:32,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181002214] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:33:32,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380937759] [2025-03-03 13:33:32,747 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 13:33:32,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:33:32,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:33:32,748 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:33:32,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2025-03-03 13:33:32,788 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 45 statements into 10 equivalence classes. [2025-03-03 13:33:32,803 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) and asserted 45 of 45 statements. [2025-03-03 13:33:32,803 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2025-03-03 13:33:32,803 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:33:32,803 INFO L256 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-03-03 13:33:32,804 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:33:33,117 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 126 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:33,117 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:33:33,261 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 126 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:33,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380937759] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:33:33,261 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:33:33,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 44 [2025-03-03 13:33:33,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002349321] [2025-03-03 13:33:33,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:33:33,262 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2025-03-03 13:33:33,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:33:33,262 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2025-03-03 13:33:33,262 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=376, Invalid=1516, Unknown=0, NotChecked=0, Total=1892 [2025-03-03 13:33:33,262 INFO L87 Difference]: Start difference. First operand 55 states and 66 transitions. Second operand has 44 states, 44 states have (on average 2.0) internal successors, (88), 44 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:33,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:33:33,370 INFO L93 Difference]: Finished difference Result 97 states and 109 transitions. [2025-03-03 13:33:33,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2025-03-03 13:33:33,371 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.0) internal successors, (88), 44 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2025-03-03 13:33:33,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:33:33,371 INFO L225 Difference]: With dead ends: 97 [2025-03-03 13:33:33,371 INFO L226 Difference]: Without dead ends: 64 [2025-03-03 13:33:33,371 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 49 SyntacticMatches, 20 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1186 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=376, Invalid=1516, Unknown=0, NotChecked=0, Total=1892 [2025-03-03 13:33:33,372 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:33:33,372 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 139 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:33:33,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2025-03-03 13:33:33,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 56. [2025-03-03 13:33:33,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.2181818181818183) internal successors, (67), 55 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:33,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 67 transitions. [2025-03-03 13:33:33,388 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 67 transitions. Word has length 45 [2025-03-03 13:33:33,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:33:33,388 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 67 transitions. [2025-03-03 13:33:33,388 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.0) internal successors, (88), 44 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:33,388 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 67 transitions. [2025-03-03 13:33:33,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2025-03-03 13:33:33,389 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:33:33,389 INFO L218 NwaCegarLoop]: trace histogram [10, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:33:33,394 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2025-03-03 13:33:33,589 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:33:33,589 INFO L396 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:33:33,590 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:33:33,590 INFO L85 PathProgramCache]: Analyzing trace with hash -2101369167, now seen corresponding path program 29 times [2025-03-03 13:33:33,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:33:33,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045106193] [2025-03-03 13:33:33,590 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 13:33:33,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:33:33,593 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 45 statements into 10 equivalence classes. [2025-03-03 13:33:33,597 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) and asserted 45 of 45 statements. [2025-03-03 13:33:33,597 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2025-03-03 13:33:33,597 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:33:33,765 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 126 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:33,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:33:33,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045106193] [2025-03-03 13:33:33,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045106193] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:33:33,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881885936] [2025-03-03 13:33:33,765 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 13:33:33,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:33:33,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:33:33,767 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:33:33,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2025-03-03 13:33:33,808 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 45 statements into 10 equivalence classes. [2025-03-03 13:33:33,822 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) and asserted 45 of 45 statements. [2025-03-03 13:33:33,822 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2025-03-03 13:33:33,822 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:33:33,823 INFO L256 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-03-03 13:33:33,823 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:33:34,107 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 126 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:34,107 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:33:34,237 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 126 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:34,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [881885936] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:33:34,238 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:33:34,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 42 [2025-03-03 13:33:34,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231953108] [2025-03-03 13:33:34,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:33:34,238 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2025-03-03 13:33:34,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:33:34,238 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2025-03-03 13:33:34,238 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=344, Invalid=1378, Unknown=0, NotChecked=0, Total=1722 [2025-03-03 13:33:34,239 INFO L87 Difference]: Start difference. First operand 56 states and 67 transitions. Second operand has 42 states, 42 states have (on average 1.9761904761904763) internal successors, (83), 42 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:34,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:33:34,369 INFO L93 Difference]: Finished difference Result 104 states and 116 transitions. [2025-03-03 13:33:34,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2025-03-03 13:33:34,369 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9761904761904763) internal successors, (83), 42 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2025-03-03 13:33:34,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:33:34,369 INFO L225 Difference]: With dead ends: 104 [2025-03-03 13:33:34,369 INFO L226 Difference]: Without dead ends: 71 [2025-03-03 13:33:34,370 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 51 SyntacticMatches, 20 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1017 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=344, Invalid=1378, Unknown=0, NotChecked=0, Total=1722 [2025-03-03 13:33:34,370 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:33:34,370 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 143 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:33:34,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2025-03-03 13:33:34,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 56. [2025-03-03 13:33:34,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.2181818181818183) internal successors, (67), 55 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:34,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 67 transitions. [2025-03-03 13:33:34,389 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 67 transitions. Word has length 45 [2025-03-03 13:33:34,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:33:34,389 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 67 transitions. [2025-03-03 13:33:34,389 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9761904761904763) internal successors, (83), 42 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:34,389 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 67 transitions. [2025-03-03 13:33:34,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2025-03-03 13:33:34,389 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:33:34,389 INFO L218 NwaCegarLoop]: trace histogram [10, 9, 9, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:33:34,395 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2025-03-03 13:33:34,590 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:33:34,590 INFO L396 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:33:34,590 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:33:34,590 INFO L85 PathProgramCache]: Analyzing trace with hash -1562472751, now seen corresponding path program 30 times [2025-03-03 13:33:34,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:33:34,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31719922] [2025-03-03 13:33:34,590 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-03 13:33:34,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:33:34,593 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 45 statements into 10 equivalence classes. [2025-03-03 13:33:34,598 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) and asserted 45 of 45 statements. [2025-03-03 13:33:34,598 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2025-03-03 13:33:34,598 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:33:34,788 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 101 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:34,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:33:34,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31719922] [2025-03-03 13:33:34,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31719922] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:33:34,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153814307] [2025-03-03 13:33:34,789 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-03 13:33:34,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:33:34,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:33:34,791 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:33:34,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2025-03-03 13:33:34,831 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 45 statements into 10 equivalence classes. [2025-03-03 13:33:34,846 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) and asserted 45 of 45 statements. [2025-03-03 13:33:34,846 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2025-03-03 13:33:34,846 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:33:34,847 INFO L256 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-03-03 13:33:34,848 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:33:35,136 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 126 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:35,136 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:33:35,289 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 126 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:35,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153814307] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:33:35,289 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:33:35,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 44 [2025-03-03 13:33:35,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787173536] [2025-03-03 13:33:35,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:33:35,290 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2025-03-03 13:33:35,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:33:35,290 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2025-03-03 13:33:35,290 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=345, Invalid=1547, Unknown=0, NotChecked=0, Total=1892 [2025-03-03 13:33:35,290 INFO L87 Difference]: Start difference. First operand 56 states and 67 transitions. Second operand has 44 states, 44 states have (on average 2.090909090909091) internal successors, (92), 44 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:35,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:33:35,438 INFO L93 Difference]: Finished difference Result 109 states and 121 transitions. [2025-03-03 13:33:35,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2025-03-03 13:33:35,439 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.090909090909091) internal successors, (92), 44 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2025-03-03 13:33:35,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:33:35,439 INFO L225 Difference]: With dead ends: 109 [2025-03-03 13:33:35,439 INFO L226 Difference]: Without dead ends: 76 [2025-03-03 13:33:35,440 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 51 SyntacticMatches, 18 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1211 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=350, Invalid=1630, Unknown=0, NotChecked=0, Total=1980 [2025-03-03 13:33:35,440 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:33:35,440 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 171 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 331 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:33:35,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2025-03-03 13:33:35,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 56. [2025-03-03 13:33:35,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.2181818181818183) internal successors, (67), 55 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:35,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 67 transitions. [2025-03-03 13:33:35,459 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 67 transitions. Word has length 45 [2025-03-03 13:33:35,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:33:35,460 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 67 transitions. [2025-03-03 13:33:35,460 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.090909090909091) internal successors, (92), 44 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:35,460 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 67 transitions. [2025-03-03 13:33:35,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2025-03-03 13:33:35,460 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:33:35,460 INFO L218 NwaCegarLoop]: trace histogram [10, 9, 9, 6, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:33:35,466 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2025-03-03 13:33:35,660 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:33:35,660 INFO L396 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:33:35,660 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:33:35,661 INFO L85 PathProgramCache]: Analyzing trace with hash -852352335, now seen corresponding path program 31 times [2025-03-03 13:33:35,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:33:35,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716844973] [2025-03-03 13:33:35,661 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-03 13:33:35,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:33:35,664 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 45 statements into 1 equivalence classes. [2025-03-03 13:33:35,666 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 45 of 45 statements. [2025-03-03 13:33:35,666 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:33:35,666 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:33:35,840 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 101 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:35,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:33:35,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716844973] [2025-03-03 13:33:35,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716844973] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:33:35,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736304040] [2025-03-03 13:33:35,840 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-03 13:33:35,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:33:35,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:33:35,842 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:33:35,842 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2025-03-03 13:33:35,883 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 45 statements into 1 equivalence classes. [2025-03-03 13:33:35,895 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 45 of 45 statements. [2025-03-03 13:33:35,896 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:33:35,896 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:33:35,899 INFO L256 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-03-03 13:33:35,900 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:33:36,181 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 126 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:36,181 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:33:36,338 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 126 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:36,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736304040] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:33:36,338 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:33:36,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 43 [2025-03-03 13:33:36,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131973343] [2025-03-03 13:33:36,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:33:36,338 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2025-03-03 13:33:36,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:33:36,339 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2025-03-03 13:33:36,339 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=323, Invalid=1483, Unknown=0, NotChecked=0, Total=1806 [2025-03-03 13:33:36,339 INFO L87 Difference]: Start difference. First operand 56 states and 67 transitions. Second operand has 43 states, 43 states have (on average 2.116279069767442) internal successors, (91), 43 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:36,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:33:36,490 INFO L93 Difference]: Finished difference Result 112 states and 124 transitions. [2025-03-03 13:33:36,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2025-03-03 13:33:36,490 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.116279069767442) internal successors, (91), 43 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2025-03-03 13:33:36,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:33:36,491 INFO L225 Difference]: With dead ends: 112 [2025-03-03 13:33:36,491 INFO L226 Difference]: Without dead ends: 79 [2025-03-03 13:33:36,491 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 52 SyntacticMatches, 18 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1128 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=328, Invalid=1564, Unknown=0, NotChecked=0, Total=1892 [2025-03-03 13:33:36,491 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:33:36,491 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 151 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:33:36,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2025-03-03 13:33:36,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 56. [2025-03-03 13:33:36,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.2181818181818183) internal successors, (67), 55 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:36,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 67 transitions. [2025-03-03 13:33:36,514 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 67 transitions. Word has length 45 [2025-03-03 13:33:36,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:33:36,514 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 67 transitions. [2025-03-03 13:33:36,514 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.116279069767442) internal successors, (91), 43 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:36,514 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 67 transitions. [2025-03-03 13:33:36,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2025-03-03 13:33:36,514 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:33:36,514 INFO L218 NwaCegarLoop]: trace histogram [10, 9, 9, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:33:36,520 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2025-03-03 13:33:36,714 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2025-03-03 13:33:36,715 INFO L396 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:33:36,715 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:33:36,715 INFO L85 PathProgramCache]: Analyzing trace with hash 1110217425, now seen corresponding path program 32 times [2025-03-03 13:33:36,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:33:36,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908802451] [2025-03-03 13:33:36,715 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:33:36,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:33:36,718 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 45 statements into 2 equivalence classes. [2025-03-03 13:33:36,721 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 45 of 45 statements. [2025-03-03 13:33:36,721 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:33:36,721 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:33:36,885 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 101 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:36,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:33:36,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908802451] [2025-03-03 13:33:36,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908802451] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:33:36,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817327915] [2025-03-03 13:33:36,885 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:33:36,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:33:36,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:33:36,887 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:33:36,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2025-03-03 13:33:36,930 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 45 statements into 2 equivalence classes. [2025-03-03 13:33:36,942 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 45 of 45 statements. [2025-03-03 13:33:36,942 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:33:36,942 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:33:36,943 INFO L256 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-03-03 13:33:36,944 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:33:37,226 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 126 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:37,226 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:33:37,373 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 126 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:37,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817327915] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:33:37,373 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:33:37,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 42 [2025-03-03 13:33:37,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219823923] [2025-03-03 13:33:37,373 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:33:37,373 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2025-03-03 13:33:37,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:33:37,374 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2025-03-03 13:33:37,374 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=1417, Unknown=0, NotChecked=0, Total=1722 [2025-03-03 13:33:37,374 INFO L87 Difference]: Start difference. First operand 56 states and 67 transitions. Second operand has 42 states, 42 states have (on average 2.142857142857143) internal successors, (90), 42 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:37,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:33:37,539 INFO L93 Difference]: Finished difference Result 113 states and 125 transitions. [2025-03-03 13:33:37,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2025-03-03 13:33:37,540 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.142857142857143) internal successors, (90), 42 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2025-03-03 13:33:37,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:33:37,540 INFO L225 Difference]: With dead ends: 113 [2025-03-03 13:33:37,540 INFO L226 Difference]: Without dead ends: 80 [2025-03-03 13:33:37,540 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 53 SyntacticMatches, 18 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1047 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=310, Invalid=1496, Unknown=0, NotChecked=0, Total=1806 [2025-03-03 13:33:37,541 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:33:37,541 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 147 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:33:37,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2025-03-03 13:33:37,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 56. [2025-03-03 13:33:37,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.2181818181818183) internal successors, (67), 55 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:37,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 67 transitions. [2025-03-03 13:33:37,561 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 67 transitions. Word has length 45 [2025-03-03 13:33:37,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:33:37,561 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 67 transitions. [2025-03-03 13:33:37,561 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.142857142857143) internal successors, (90), 42 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:37,561 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 67 transitions. [2025-03-03 13:33:37,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2025-03-03 13:33:37,562 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:33:37,562 INFO L218 NwaCegarLoop]: trace histogram [10, 9, 9, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:33:37,568 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2025-03-03 13:33:37,762 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2025-03-03 13:33:37,762 INFO L396 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:33:37,762 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:33:37,763 INFO L85 PathProgramCache]: Analyzing trace with hash -904683855, now seen corresponding path program 33 times [2025-03-03 13:33:37,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:33:37,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265937226] [2025-03-03 13:33:37,763 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 13:33:37,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:33:37,769 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 45 statements into 10 equivalence classes. [2025-03-03 13:33:37,773 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) and asserted 45 of 45 statements. [2025-03-03 13:33:37,774 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2025-03-03 13:33:37,774 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:33:37,938 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 101 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:37,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:33:37,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265937226] [2025-03-03 13:33:37,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265937226] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:33:37,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847558361] [2025-03-03 13:33:37,939 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 13:33:37,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:33:37,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:33:37,940 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:33:37,942 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2025-03-03 13:33:37,983 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 45 statements into 10 equivalence classes. [2025-03-03 13:33:37,998 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) and asserted 45 of 45 statements. [2025-03-03 13:33:37,998 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2025-03-03 13:33:37,998 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:33:37,999 INFO L256 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-03-03 13:33:38,000 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:33:38,267 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 126 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:38,267 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:33:38,409 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 126 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:38,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847558361] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:33:38,410 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:33:38,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 41 [2025-03-03 13:33:38,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19056728] [2025-03-03 13:33:38,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:33:38,410 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2025-03-03 13:33:38,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:33:38,410 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2025-03-03 13:33:38,410 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=1349, Unknown=0, NotChecked=0, Total=1640 [2025-03-03 13:33:38,411 INFO L87 Difference]: Start difference. First operand 56 states and 67 transitions. Second operand has 41 states, 41 states have (on average 2.1707317073170733) internal successors, (89), 41 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:38,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:33:38,582 INFO L93 Difference]: Finished difference Result 114 states and 126 transitions. [2025-03-03 13:33:38,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2025-03-03 13:33:38,582 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1707317073170733) internal successors, (89), 41 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2025-03-03 13:33:38,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:33:38,583 INFO L225 Difference]: With dead ends: 114 [2025-03-03 13:33:38,583 INFO L226 Difference]: Without dead ends: 81 [2025-03-03 13:33:38,583 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 54 SyntacticMatches, 18 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 968 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=296, Invalid=1426, Unknown=0, NotChecked=0, Total=1722 [2025-03-03 13:33:38,583 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:33:38,583 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 161 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 314 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:33:38,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2025-03-03 13:33:38,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 56. [2025-03-03 13:33:38,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.2181818181818183) internal successors, (67), 55 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:38,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 67 transitions. [2025-03-03 13:33:38,604 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 67 transitions. Word has length 45 [2025-03-03 13:33:38,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:33:38,604 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 67 transitions. [2025-03-03 13:33:38,604 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.1707317073170733) internal successors, (89), 41 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:38,604 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 67 transitions. [2025-03-03 13:33:38,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2025-03-03 13:33:38,604 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:33:38,605 INFO L218 NwaCegarLoop]: trace histogram [10, 9, 9, 6, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:33:38,610 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2025-03-03 13:33:38,805 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2025-03-03 13:33:38,805 INFO L396 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:33:38,805 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:33:38,805 INFO L85 PathProgramCache]: Analyzing trace with hash -1523869999, now seen corresponding path program 34 times [2025-03-03 13:33:38,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:33:38,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161375993] [2025-03-03 13:33:38,805 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 13:33:38,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:33:38,809 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 45 statements into 2 equivalence classes. [2025-03-03 13:33:38,812 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 45 of 45 statements. [2025-03-03 13:33:38,812 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-03 13:33:38,812 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:33:38,968 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 126 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:38,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:33:38,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161375993] [2025-03-03 13:33:38,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161375993] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:33:38,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528566011] [2025-03-03 13:33:38,969 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 13:33:38,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:33:38,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:33:38,970 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:33:38,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2025-03-03 13:33:39,014 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 45 statements into 2 equivalence classes. [2025-03-03 13:33:39,026 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 45 of 45 statements. [2025-03-03 13:33:39,026 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-03 13:33:39,026 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:33:39,027 INFO L256 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-03-03 13:33:39,028 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:33:39,271 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 126 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:39,271 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:33:39,404 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 126 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:39,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528566011] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:33:39,405 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:33:39,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 37 [2025-03-03 13:33:39,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132089000] [2025-03-03 13:33:39,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:33:39,405 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2025-03-03 13:33:39,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:33:39,405 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2025-03-03 13:33:39,405 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=1073, Unknown=0, NotChecked=0, Total=1332 [2025-03-03 13:33:39,405 INFO L87 Difference]: Start difference. First operand 56 states and 67 transitions. Second operand has 37 states, 37 states have (on average 2.108108108108108) internal successors, (78), 37 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:39,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:33:39,547 INFO L93 Difference]: Finished difference Result 113 states and 125 transitions. [2025-03-03 13:33:39,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2025-03-03 13:33:39,547 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.108108108108108) internal successors, (78), 37 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2025-03-03 13:33:39,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:33:39,548 INFO L225 Difference]: With dead ends: 113 [2025-03-03 13:33:39,548 INFO L226 Difference]: Without dead ends: 80 [2025-03-03 13:33:39,548 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 56 SyntacticMatches, 20 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 677 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=259, Invalid=1073, Unknown=0, NotChecked=0, Total=1332 [2025-03-03 13:33:39,548 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:33:39,548 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 124 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:33:39,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2025-03-03 13:33:39,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 56. [2025-03-03 13:33:39,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.2181818181818183) internal successors, (67), 55 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:39,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 67 transitions. [2025-03-03 13:33:39,569 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 67 transitions. Word has length 45 [2025-03-03 13:33:39,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:33:39,569 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 67 transitions. [2025-03-03 13:33:39,569 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.108108108108108) internal successors, (78), 37 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:39,570 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 67 transitions. [2025-03-03 13:33:39,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2025-03-03 13:33:39,570 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:33:39,570 INFO L218 NwaCegarLoop]: trace histogram [10, 9, 9, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:33:39,577 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2025-03-03 13:33:39,771 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:33:39,771 INFO L396 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:33:39,771 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:33:39,771 INFO L85 PathProgramCache]: Analyzing trace with hash 1227102897, now seen corresponding path program 35 times [2025-03-03 13:33:39,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:33:39,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558014975] [2025-03-03 13:33:39,772 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 13:33:39,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:33:39,775 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 45 statements into 10 equivalence classes. [2025-03-03 13:33:39,779 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) and asserted 45 of 45 statements. [2025-03-03 13:33:39,779 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2025-03-03 13:33:39,779 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:33:39,940 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 126 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:39,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:33:39,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558014975] [2025-03-03 13:33:39,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558014975] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:33:39,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090475535] [2025-03-03 13:33:39,940 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 13:33:39,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:33:39,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:33:39,942 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:33:39,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2025-03-03 13:33:39,987 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 45 statements into 10 equivalence classes. [2025-03-03 13:33:40,002 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) and asserted 45 of 45 statements. [2025-03-03 13:33:40,002 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2025-03-03 13:33:40,002 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:33:40,002 INFO L256 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-03-03 13:33:40,003 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:33:40,237 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 126 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:40,237 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:33:40,372 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 126 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:40,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090475535] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:33:40,373 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:33:40,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 36 [2025-03-03 13:33:40,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534082947] [2025-03-03 13:33:40,373 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:33:40,373 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2025-03-03 13:33:40,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:33:40,373 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2025-03-03 13:33:40,373 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=1006, Unknown=0, NotChecked=0, Total=1260 [2025-03-03 13:33:40,373 INFO L87 Difference]: Start difference. First operand 56 states and 67 transitions. Second operand has 36 states, 36 states have (on average 2.138888888888889) internal successors, (77), 36 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:40,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:33:40,507 INFO L93 Difference]: Finished difference Result 110 states and 122 transitions. [2025-03-03 13:33:40,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2025-03-03 13:33:40,507 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.138888888888889) internal successors, (77), 36 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2025-03-03 13:33:40,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:33:40,508 INFO L225 Difference]: With dead ends: 110 [2025-03-03 13:33:40,508 INFO L226 Difference]: Without dead ends: 77 [2025-03-03 13:33:40,508 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 57 SyntacticMatches, 20 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 615 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=254, Invalid=1006, Unknown=0, NotChecked=0, Total=1260 [2025-03-03 13:33:40,508 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:33:40,509 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 124 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:33:40,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2025-03-03 13:33:40,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 56. [2025-03-03 13:33:40,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.2181818181818183) internal successors, (67), 55 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:40,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 67 transitions. [2025-03-03 13:33:40,529 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 67 transitions. Word has length 45 [2025-03-03 13:33:40,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:33:40,529 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 67 transitions. [2025-03-03 13:33:40,529 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.138888888888889) internal successors, (77), 36 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:40,529 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 67 transitions. [2025-03-03 13:33:40,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2025-03-03 13:33:40,530 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:33:40,530 INFO L218 NwaCegarLoop]: trace histogram [10, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:33:40,536 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2025-03-03 13:33:40,730 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:33:40,730 INFO L396 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:33:40,730 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:33:40,730 INFO L85 PathProgramCache]: Analyzing trace with hash 68917969, now seen corresponding path program 36 times [2025-03-03 13:33:40,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:33:40,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367256336] [2025-03-03 13:33:40,731 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-03 13:33:40,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:33:40,734 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 45 statements into 10 equivalence classes. [2025-03-03 13:33:40,738 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) and asserted 45 of 45 statements. [2025-03-03 13:33:40,738 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2025-03-03 13:33:40,738 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:33:40,966 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 101 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:40,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:33:40,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367256336] [2025-03-03 13:33:40,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367256336] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:33:40,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715191473] [2025-03-03 13:33:40,966 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-03 13:33:40,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:33:40,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:33:40,969 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:33:40,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2025-03-03 13:33:41,020 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 45 statements into 10 equivalence classes. [2025-03-03 13:33:41,043 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) and asserted 45 of 45 statements. [2025-03-03 13:33:41,043 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2025-03-03 13:33:41,043 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:33:41,044 INFO L256 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-03-03 13:33:41,045 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:33:41,313 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 126 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:41,313 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:33:41,458 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 126 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:41,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715191473] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:33:41,458 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:33:41,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 38 [2025-03-03 13:33:41,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929440806] [2025-03-03 13:33:41,459 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:33:41,459 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2025-03-03 13:33:41,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:33:41,459 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2025-03-03 13:33:41,459 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=1133, Unknown=0, NotChecked=0, Total=1406 [2025-03-03 13:33:41,459 INFO L87 Difference]: Start difference. First operand 56 states and 67 transitions. Second operand has 38 states, 38 states have (on average 2.263157894736842) internal successors, (86), 38 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:41,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:33:41,594 INFO L93 Difference]: Finished difference Result 105 states and 117 transitions. [2025-03-03 13:33:41,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2025-03-03 13:33:41,594 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.263157894736842) internal successors, (86), 38 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2025-03-03 13:33:41,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:33:41,594 INFO L225 Difference]: With dead ends: 105 [2025-03-03 13:33:41,594 INFO L226 Difference]: Without dead ends: 72 [2025-03-03 13:33:41,595 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 57 SyntacticMatches, 18 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 743 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=278, Invalid=1204, Unknown=0, NotChecked=0, Total=1482 [2025-03-03 13:33:41,595 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:33:41,595 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 126 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:33:41,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2025-03-03 13:33:41,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 56. [2025-03-03 13:33:41,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.2181818181818183) internal successors, (67), 55 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:41,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 67 transitions. [2025-03-03 13:33:41,616 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 67 transitions. Word has length 45 [2025-03-03 13:33:41,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:33:41,616 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 67 transitions. [2025-03-03 13:33:41,616 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.263157894736842) internal successors, (86), 38 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:41,616 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 67 transitions. [2025-03-03 13:33:41,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2025-03-03 13:33:41,616 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:33:41,616 INFO L218 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:33:41,622 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2025-03-03 13:33:41,820 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:33:41,821 INFO L396 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:33:41,821 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:33:41,821 INFO L85 PathProgramCache]: Analyzing trace with hash 170104497, now seen corresponding path program 9 times [2025-03-03 13:33:41,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:33:41,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127380581] [2025-03-03 13:33:41,821 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 13:33:41,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:33:41,824 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 45 statements into 10 equivalence classes. [2025-03-03 13:33:41,829 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) and asserted 45 of 45 statements. [2025-03-03 13:33:41,829 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2025-03-03 13:33:41,829 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:33:42,004 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 101 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:42,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:33:42,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127380581] [2025-03-03 13:33:42,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127380581] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:33:42,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041121457] [2025-03-03 13:33:42,004 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 13:33:42,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:33:42,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:33:42,007 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:33:42,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2025-03-03 13:33:42,052 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 45 statements into 10 equivalence classes. [2025-03-03 13:33:42,067 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) and asserted 45 of 45 statements. [2025-03-03 13:33:42,067 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2025-03-03 13:33:42,067 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:33:42,067 INFO L256 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-03-03 13:33:42,068 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:33:42,305 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 126 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:42,305 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:33:42,445 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 126 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:42,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041121457] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:33:42,445 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:33:42,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 37 [2025-03-03 13:33:42,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653357390] [2025-03-03 13:33:42,446 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:33:42,446 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2025-03-03 13:33:42,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:33:42,446 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2025-03-03 13:33:42,447 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=1057, Unknown=0, NotChecked=0, Total=1332 [2025-03-03 13:33:42,447 INFO L87 Difference]: Start difference. First operand 56 states and 67 transitions. Second operand has 37 states, 37 states have (on average 2.27027027027027) internal successors, (84), 37 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:42,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:33:42,569 INFO L93 Difference]: Finished difference Result 99 states and 112 transitions. [2025-03-03 13:33:42,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2025-03-03 13:33:42,569 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.27027027027027) internal successors, (84), 37 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2025-03-03 13:33:42,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:33:42,569 INFO L225 Difference]: With dead ends: 99 [2025-03-03 13:33:42,569 INFO L226 Difference]: Without dead ends: 66 [2025-03-03 13:33:42,570 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 58 SyntacticMatches, 18 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 656 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=280, Invalid=1126, Unknown=0, NotChecked=0, Total=1406 [2025-03-03 13:33:42,570 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:33:42,570 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 134 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:33:42,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2025-03-03 13:33:42,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 57. [2025-03-03 13:33:42,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.2321428571428572) internal successors, (69), 56 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:42,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 69 transitions. [2025-03-03 13:33:42,591 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 69 transitions. Word has length 45 [2025-03-03 13:33:42,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:33:42,592 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 69 transitions. [2025-03-03 13:33:42,592 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.27027027027027) internal successors, (84), 37 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:42,592 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 69 transitions. [2025-03-03 13:33:42,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2025-03-03 13:33:42,592 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:33:42,592 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:33:42,598 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2025-03-03 13:33:42,792 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2025-03-03 13:33:42,792 INFO L396 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:33:42,792 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:33:42,793 INFO L85 PathProgramCache]: Analyzing trace with hash 550812735, now seen corresponding path program 18 times [2025-03-03 13:33:42,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:33:42,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750908855] [2025-03-03 13:33:42,793 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-03 13:33:42,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:33:42,796 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 46 statements into 10 equivalence classes. [2025-03-03 13:33:42,802 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) and asserted 46 of 46 statements. [2025-03-03 13:33:42,802 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2025-03-03 13:33:42,802 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:33:42,917 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 45 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:42,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:33:42,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750908855] [2025-03-03 13:33:42,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750908855] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:33:42,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457247574] [2025-03-03 13:33:42,918 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-03 13:33:42,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:33:42,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:33:42,920 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:33:42,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2025-03-03 13:33:42,970 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 46 statements into 10 equivalence classes. [2025-03-03 13:33:42,989 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) and asserted 46 of 46 statements. [2025-03-03 13:33:42,989 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2025-03-03 13:33:42,989 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:33:42,990 INFO L256 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 26 conjuncts are in the unsatisfiable core [2025-03-03 13:33:42,992 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:33:43,037 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 55 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:43,037 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:33:43,131 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 55 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:43,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457247574] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:33:43,131 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:33:43,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 16 [2025-03-03 13:33:43,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438853397] [2025-03-03 13:33:43,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:33:43,131 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-03 13:33:43,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:33:43,132 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-03 13:33:43,132 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2025-03-03 13:33:43,132 INFO L87 Difference]: Start difference. First operand 57 states and 69 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:43,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:33:43,254 INFO L93 Difference]: Finished difference Result 68 states and 80 transitions. [2025-03-03 13:33:43,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-03-03 13:33:43,255 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2025-03-03 13:33:43,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:33:43,255 INFO L225 Difference]: With dead ends: 68 [2025-03-03 13:33:43,255 INFO L226 Difference]: Without dead ends: 66 [2025-03-03 13:33:43,256 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 79 SyntacticMatches, 20 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=236, Invalid=414, Unknown=0, NotChecked=0, Total=650 [2025-03-03 13:33:43,256 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 16 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:33:43,256 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 77 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:33:43,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2025-03-03 13:33:43,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 60. [2025-03-03 13:33:43,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.2203389830508475) internal successors, (72), 59 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:43,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 72 transitions. [2025-03-03 13:33:43,278 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 72 transitions. Word has length 46 [2025-03-03 13:33:43,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:33:43,278 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 72 transitions. [2025-03-03 13:33:43,278 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:43,278 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 72 transitions. [2025-03-03 13:33:43,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2025-03-03 13:33:43,279 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:33:43,279 INFO L218 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:33:43,285 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2025-03-03 13:33:43,479 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:33:43,479 INFO L396 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:33:43,480 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:33:43,480 INFO L85 PathProgramCache]: Analyzing trace with hash -1807008597, now seen corresponding path program 19 times [2025-03-03 13:33:43,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:33:43,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907319401] [2025-03-03 13:33:43,480 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-03 13:33:43,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:33:43,484 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 49 statements into 1 equivalence classes. [2025-03-03 13:33:43,486 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 49 of 49 statements. [2025-03-03 13:33:43,486 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:33:43,486 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:33:43,685 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 127 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:43,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:33:43,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907319401] [2025-03-03 13:33:43,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907319401] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:33:43,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229161599] [2025-03-03 13:33:43,685 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-03 13:33:43,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:33:43,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:33:43,687 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:33:43,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2025-03-03 13:33:43,732 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 49 statements into 1 equivalence classes. [2025-03-03 13:33:43,745 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 49 of 49 statements. [2025-03-03 13:33:43,745 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:33:43,745 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:33:43,746 INFO L256 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 26 conjuncts are in the unsatisfiable core [2025-03-03 13:33:43,747 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:33:44,105 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 155 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:44,105 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:33:44,282 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 155 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:44,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229161599] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:33:44,282 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:33:44,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 50 [2025-03-03 13:33:44,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972762296] [2025-03-03 13:33:44,282 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:33:44,282 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2025-03-03 13:33:44,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:33:44,283 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2025-03-03 13:33:44,283 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=473, Invalid=1977, Unknown=0, NotChecked=0, Total=2450 [2025-03-03 13:33:44,283 INFO L87 Difference]: Start difference. First operand 60 states and 72 transitions. Second operand has 50 states, 50 states have (on average 2.02) internal successors, (101), 50 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:44,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:33:44,403 INFO L93 Difference]: Finished difference Result 106 states and 119 transitions. [2025-03-03 13:33:44,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-03-03 13:33:44,403 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.02) internal successors, (101), 50 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2025-03-03 13:33:44,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:33:44,404 INFO L225 Difference]: With dead ends: 106 [2025-03-03 13:33:44,404 INFO L226 Difference]: Without dead ends: 70 [2025-03-03 13:33:44,404 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 53 SyntacticMatches, 20 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1628 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=478, Invalid=2072, Unknown=0, NotChecked=0, Total=2550 [2025-03-03 13:33:44,404 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:33:44,404 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 118 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:33:44,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2025-03-03 13:33:44,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 61. [2025-03-03 13:33:44,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.2166666666666666) internal successors, (73), 60 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:44,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 73 transitions. [2025-03-03 13:33:44,430 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 73 transitions. Word has length 49 [2025-03-03 13:33:44,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:33:44,430 INFO L471 AbstractCegarLoop]: Abstraction has 61 states and 73 transitions. [2025-03-03 13:33:44,430 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.02) internal successors, (101), 50 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:44,430 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 73 transitions. [2025-03-03 13:33:44,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2025-03-03 13:33:44,431 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:33:44,431 INFO L218 NwaCegarLoop]: trace histogram [11, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:33:44,437 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2025-03-03 13:33:44,631 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2025-03-03 13:33:44,631 INFO L396 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:33:44,631 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:33:44,632 INFO L85 PathProgramCache]: Analyzing trace with hash -237475701, now seen corresponding path program 37 times [2025-03-03 13:33:44,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:33:44,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241011121] [2025-03-03 13:33:44,632 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-03 13:33:44,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:33:44,635 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 49 statements into 1 equivalence classes. [2025-03-03 13:33:44,638 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 49 of 49 statements. [2025-03-03 13:33:44,638 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:33:44,638 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:33:44,830 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 127 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:44,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:33:44,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241011121] [2025-03-03 13:33:44,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241011121] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:33:44,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434854902] [2025-03-03 13:33:44,831 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-03 13:33:44,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:33:44,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:33:44,832 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:33:44,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2025-03-03 13:33:44,884 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 49 statements into 1 equivalence classes. [2025-03-03 13:33:44,896 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 49 of 49 statements. [2025-03-03 13:33:44,896 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:33:44,896 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:33:44,897 INFO L256 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 26 conjuncts are in the unsatisfiable core [2025-03-03 13:33:44,898 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:33:45,273 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 155 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:45,273 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:33:45,450 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 155 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:45,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434854902] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:33:45,450 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:33:45,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2025-03-03 13:33:45,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698155379] [2025-03-03 13:33:45,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:33:45,450 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2025-03-03 13:33:45,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:33:45,451 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2025-03-03 13:33:45,451 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=1912, Unknown=0, NotChecked=0, Total=2352 [2025-03-03 13:33:45,451 INFO L87 Difference]: Start difference. First operand 61 states and 73 transitions. Second operand has 49 states, 49 states have (on average 2.061224489795918) internal successors, (101), 49 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:45,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:33:45,610 INFO L93 Difference]: Finished difference Result 114 states and 127 transitions. [2025-03-03 13:33:45,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-03-03 13:33:45,610 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.061224489795918) internal successors, (101), 49 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2025-03-03 13:33:45,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:33:45,611 INFO L225 Difference]: With dead ends: 114 [2025-03-03 13:33:45,611 INFO L226 Difference]: Without dead ends: 78 [2025-03-03 13:33:45,611 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 54 SyntacticMatches, 20 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1571 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=445, Invalid=2005, Unknown=0, NotChecked=0, Total=2450 [2025-03-03 13:33:45,611 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:33:45,611 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 135 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:33:45,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2025-03-03 13:33:45,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 61. [2025-03-03 13:33:45,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.2166666666666666) internal successors, (73), 60 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:45,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 73 transitions. [2025-03-03 13:33:45,640 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 73 transitions. Word has length 49 [2025-03-03 13:33:45,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:33:45,640 INFO L471 AbstractCegarLoop]: Abstraction has 61 states and 73 transitions. [2025-03-03 13:33:45,640 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.061224489795918) internal successors, (101), 49 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:45,640 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 73 transitions. [2025-03-03 13:33:45,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2025-03-03 13:33:45,640 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:33:45,640 INFO L218 NwaCegarLoop]: trace histogram [11, 10, 10, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:33:45,646 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2025-03-03 13:33:45,840 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2025-03-03 13:33:45,840 INFO L396 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:33:45,841 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:33:45,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1710866261, now seen corresponding path program 38 times [2025-03-03 13:33:45,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:33:45,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675113446] [2025-03-03 13:33:45,841 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:33:45,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:33:45,844 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 49 statements into 2 equivalence classes. [2025-03-03 13:33:45,847 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 49 of 49 statements. [2025-03-03 13:33:45,847 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:33:45,847 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:33:46,043 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 127 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:46,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:33:46,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675113446] [2025-03-03 13:33:46,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675113446] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:33:46,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599153962] [2025-03-03 13:33:46,043 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:33:46,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:33:46,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:33:46,044 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:33:46,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2025-03-03 13:33:46,093 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 49 statements into 2 equivalence classes. [2025-03-03 13:33:46,106 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 49 of 49 statements. [2025-03-03 13:33:46,106 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:33:46,106 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:33:46,107 INFO L256 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 26 conjuncts are in the unsatisfiable core [2025-03-03 13:33:46,108 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:33:46,440 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 155 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:46,440 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:33:46,609 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 155 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:46,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599153962] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:33:46,609 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:33:46,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 48 [2025-03-03 13:33:46,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629966606] [2025-03-03 13:33:46,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:33:46,609 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2025-03-03 13:33:46,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:33:46,609 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2025-03-03 13:33:46,610 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=1845, Unknown=0, NotChecked=0, Total=2256 [2025-03-03 13:33:46,610 INFO L87 Difference]: Start difference. First operand 61 states and 73 transitions. Second operand has 48 states, 48 states have (on average 2.0833333333333335) internal successors, (100), 48 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:46,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:33:46,800 INFO L93 Difference]: Finished difference Result 120 states and 133 transitions. [2025-03-03 13:33:46,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-03-03 13:33:46,800 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.0833333333333335) internal successors, (100), 48 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2025-03-03 13:33:46,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:33:46,801 INFO L225 Difference]: With dead ends: 120 [2025-03-03 13:33:46,801 INFO L226 Difference]: Without dead ends: 84 [2025-03-03 13:33:46,801 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 55 SyntacticMatches, 20 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1477 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=416, Invalid=1936, Unknown=0, NotChecked=0, Total=2352 [2025-03-03 13:33:46,801 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:33:46,801 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 172 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:33:46,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2025-03-03 13:33:46,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 61. [2025-03-03 13:33:46,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.2166666666666666) internal successors, (73), 60 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:46,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 73 transitions. [2025-03-03 13:33:46,831 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 73 transitions. Word has length 49 [2025-03-03 13:33:46,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:33:46,831 INFO L471 AbstractCegarLoop]: Abstraction has 61 states and 73 transitions. [2025-03-03 13:33:46,831 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.0833333333333335) internal successors, (100), 48 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:46,831 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 73 transitions. [2025-03-03 13:33:46,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2025-03-03 13:33:46,831 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:33:46,831 INFO L218 NwaCegarLoop]: trace histogram [11, 10, 10, 7, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:33:46,837 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2025-03-03 13:33:47,032 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2025-03-03 13:33:47,032 INFO L396 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:33:47,032 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:33:47,032 INFO L85 PathProgramCache]: Analyzing trace with hash -2035489653, now seen corresponding path program 39 times [2025-03-03 13:33:47,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:33:47,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292281663] [2025-03-03 13:33:47,032 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 13:33:47,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:33:47,036 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 49 statements into 11 equivalence classes. [2025-03-03 13:33:47,040 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) and asserted 49 of 49 statements. [2025-03-03 13:33:47,040 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2025-03-03 13:33:47,040 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:33:47,282 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 127 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:47,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:33:47,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292281663] [2025-03-03 13:33:47,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292281663] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:33:47,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893385652] [2025-03-03 13:33:47,283 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 13:33:47,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:33:47,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:33:47,285 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:33:47,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2025-03-03 13:33:47,339 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 49 statements into 11 equivalence classes. [2025-03-03 13:33:47,356 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) and asserted 49 of 49 statements. [2025-03-03 13:33:47,356 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2025-03-03 13:33:47,356 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:33:47,356 INFO L256 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 26 conjuncts are in the unsatisfiable core [2025-03-03 13:33:47,357 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:33:47,683 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 155 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:47,683 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:33:47,853 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 155 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:47,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893385652] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:33:47,854 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:33:47,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 47 [2025-03-03 13:33:47,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270645322] [2025-03-03 13:33:47,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:33:47,854 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2025-03-03 13:33:47,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:33:47,854 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2025-03-03 13:33:47,854 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=386, Invalid=1776, Unknown=0, NotChecked=0, Total=2162 [2025-03-03 13:33:47,854 INFO L87 Difference]: Start difference. First operand 61 states and 73 transitions. Second operand has 47 states, 47 states have (on average 2.106382978723404) internal successors, (99), 47 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:48,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:33:48,090 INFO L93 Difference]: Finished difference Result 124 states and 137 transitions. [2025-03-03 13:33:48,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-03-03 13:33:48,091 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.106382978723404) internal successors, (99), 47 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2025-03-03 13:33:48,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:33:48,091 INFO L225 Difference]: With dead ends: 124 [2025-03-03 13:33:48,091 INFO L226 Difference]: Without dead ends: 88 [2025-03-03 13:33:48,092 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 56 SyntacticMatches, 20 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1385 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=391, Invalid=1865, Unknown=0, NotChecked=0, Total=2256 [2025-03-03 13:33:48,092 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:33:48,092 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 233 Invalid, 451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 451 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:33:48,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2025-03-03 13:33:48,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 61. [2025-03-03 13:33:48,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.2166666666666666) internal successors, (73), 60 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:48,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 73 transitions. [2025-03-03 13:33:48,125 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 73 transitions. Word has length 49 [2025-03-03 13:33:48,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:33:48,125 INFO L471 AbstractCegarLoop]: Abstraction has 61 states and 73 transitions. [2025-03-03 13:33:48,125 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.106382978723404) internal successors, (99), 47 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:48,125 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 73 transitions. [2025-03-03 13:33:48,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2025-03-03 13:33:48,125 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:33:48,125 INFO L218 NwaCegarLoop]: trace histogram [11, 10, 10, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:33:48,131 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2025-03-03 13:33:48,325 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2025-03-03 13:33:48,326 INFO L396 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:33:48,326 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:33:48,326 INFO L85 PathProgramCache]: Analyzing trace with hash 447890603, now seen corresponding path program 40 times [2025-03-03 13:33:48,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:33:48,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254111061] [2025-03-03 13:33:48,326 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 13:33:48,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:33:48,329 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 49 statements into 2 equivalence classes. [2025-03-03 13:33:48,333 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 49 of 49 statements. [2025-03-03 13:33:48,333 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-03 13:33:48,333 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:33:48,516 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 155 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:48,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:33:48,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254111061] [2025-03-03 13:33:48,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254111061] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:33:48,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240048216] [2025-03-03 13:33:48,516 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 13:33:48,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:33:48,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:33:48,518 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:33:48,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2025-03-03 13:33:48,568 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 49 statements into 2 equivalence classes. [2025-03-03 13:33:48,581 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 49 of 49 statements. [2025-03-03 13:33:48,581 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-03 13:33:48,581 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:33:48,582 INFO L256 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 26 conjuncts are in the unsatisfiable core [2025-03-03 13:33:48,583 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:33:48,926 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 155 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:48,926 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:33:49,077 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 155 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:49,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240048216] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:33:49,077 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:33:49,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 43 [2025-03-03 13:33:49,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763229705] [2025-03-03 13:33:49,077 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:33:49,077 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2025-03-03 13:33:49,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:33:49,078 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2025-03-03 13:33:49,078 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=339, Invalid=1467, Unknown=0, NotChecked=0, Total=1806 [2025-03-03 13:33:49,078 INFO L87 Difference]: Start difference. First operand 61 states and 73 transitions. Second operand has 43 states, 43 states have (on average 2.046511627906977) internal successors, (88), 43 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:49,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:33:49,273 INFO L93 Difference]: Finished difference Result 126 states and 139 transitions. [2025-03-03 13:33:49,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-03-03 13:33:49,274 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.046511627906977) internal successors, (88), 43 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2025-03-03 13:33:49,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:33:49,274 INFO L225 Difference]: With dead ends: 126 [2025-03-03 13:33:49,274 INFO L226 Difference]: Without dead ends: 90 [2025-03-03 13:33:49,275 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 58 SyntacticMatches, 22 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1016 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=339, Invalid=1467, Unknown=0, NotChecked=0, Total=1806 [2025-03-03 13:33:49,275 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:33:49,275 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 140 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:33:49,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2025-03-03 13:33:49,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 61. [2025-03-03 13:33:49,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.2166666666666666) internal successors, (73), 60 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:49,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 73 transitions. [2025-03-03 13:33:49,306 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 73 transitions. Word has length 49 [2025-03-03 13:33:49,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:33:49,306 INFO L471 AbstractCegarLoop]: Abstraction has 61 states and 73 transitions. [2025-03-03 13:33:49,306 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.046511627906977) internal successors, (88), 43 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:49,306 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 73 transitions. [2025-03-03 13:33:49,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2025-03-03 13:33:49,306 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:33:49,306 INFO L218 NwaCegarLoop]: trace histogram [11, 10, 10, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:33:49,312 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2025-03-03 13:33:49,506 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:33:49,507 INFO L396 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:33:49,507 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:33:49,507 INFO L85 PathProgramCache]: Analyzing trace with hash -26189685, now seen corresponding path program 41 times [2025-03-03 13:33:49,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:33:49,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067934106] [2025-03-03 13:33:49,507 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 13:33:49,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:33:49,510 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 49 statements into 11 equivalence classes. [2025-03-03 13:33:49,515 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) and asserted 49 of 49 statements. [2025-03-03 13:33:49,515 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2025-03-03 13:33:49,515 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:33:49,695 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 155 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:49,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:33:49,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067934106] [2025-03-03 13:33:49,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067934106] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:33:49,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350747229] [2025-03-03 13:33:49,696 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 13:33:49,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:33:49,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:33:49,697 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:33:49,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2025-03-03 13:33:49,749 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 49 statements into 11 equivalence classes. [2025-03-03 13:33:49,765 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) and asserted 49 of 49 statements. [2025-03-03 13:33:49,765 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2025-03-03 13:33:49,766 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:33:49,766 INFO L256 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 26 conjuncts are in the unsatisfiable core [2025-03-03 13:33:49,767 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:33:50,062 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 155 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:50,063 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:33:50,207 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 155 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:50,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350747229] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:33:50,207 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:33:50,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 42 [2025-03-03 13:33:50,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944427288] [2025-03-03 13:33:50,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:33:50,207 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2025-03-03 13:33:50,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:33:50,207 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2025-03-03 13:33:50,208 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=323, Invalid=1399, Unknown=0, NotChecked=0, Total=1722 [2025-03-03 13:33:50,208 INFO L87 Difference]: Start difference. First operand 61 states and 73 transitions. Second operand has 42 states, 42 states have (on average 2.0714285714285716) internal successors, (87), 42 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:50,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:33:50,416 INFO L93 Difference]: Finished difference Result 127 states and 140 transitions. [2025-03-03 13:33:50,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-03-03 13:33:50,416 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.0714285714285716) internal successors, (87), 42 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2025-03-03 13:33:50,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:33:50,417 INFO L225 Difference]: With dead ends: 127 [2025-03-03 13:33:50,417 INFO L226 Difference]: Without dead ends: 91 [2025-03-03 13:33:50,417 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 59 SyntacticMatches, 22 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 942 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=323, Invalid=1399, Unknown=0, NotChecked=0, Total=1722 [2025-03-03 13:33:50,417 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:33:50,417 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 152 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:33:50,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2025-03-03 13:33:50,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 61. [2025-03-03 13:33:50,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.2166666666666666) internal successors, (73), 60 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:50,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 73 transitions. [2025-03-03 13:33:50,449 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 73 transitions. Word has length 49 [2025-03-03 13:33:50,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:33:50,449 INFO L471 AbstractCegarLoop]: Abstraction has 61 states and 73 transitions. [2025-03-03 13:33:50,449 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.0714285714285716) internal successors, (87), 42 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:50,449 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 73 transitions. [2025-03-03 13:33:50,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2025-03-03 13:33:50,449 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:33:50,449 INFO L218 NwaCegarLoop]: trace histogram [11, 10, 10, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:33:50,455 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2025-03-03 13:33:50,649 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:33:50,650 INFO L396 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:33:50,650 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:33:50,650 INFO L85 PathProgramCache]: Analyzing trace with hash 512706731, now seen corresponding path program 42 times [2025-03-03 13:33:50,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:33:50,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156300778] [2025-03-03 13:33:50,650 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-03 13:33:50,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:33:50,653 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 49 statements into 11 equivalence classes. [2025-03-03 13:33:50,658 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) and asserted 49 of 49 statements. [2025-03-03 13:33:50,658 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2025-03-03 13:33:50,658 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:33:50,893 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 127 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:50,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:33:50,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156300778] [2025-03-03 13:33:50,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156300778] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:33:50,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773107921] [2025-03-03 13:33:50,893 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-03 13:33:50,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:33:50,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:33:50,895 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:33:50,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2025-03-03 13:33:50,949 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 49 statements into 11 equivalence classes. [2025-03-03 13:33:50,965 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) and asserted 49 of 49 statements. [2025-03-03 13:33:50,965 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2025-03-03 13:33:50,965 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:33:50,966 INFO L256 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 26 conjuncts are in the unsatisfiable core [2025-03-03 13:33:50,967 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:33:51,258 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 155 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:51,258 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:33:51,433 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 155 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:51,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773107921] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:33:51,433 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:33:51,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 44 [2025-03-03 13:33:51,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430053025] [2025-03-03 13:33:51,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:33:51,433 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2025-03-03 13:33:51,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:33:51,434 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2025-03-03 13:33:51,434 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=335, Invalid=1557, Unknown=0, NotChecked=0, Total=1892 [2025-03-03 13:33:51,434 INFO L87 Difference]: Start difference. First operand 61 states and 73 transitions. Second operand has 44 states, 44 states have (on average 2.1818181818181817) internal successors, (96), 44 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:51,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:33:51,672 INFO L93 Difference]: Finished difference Result 127 states and 140 transitions. [2025-03-03 13:33:51,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-03-03 13:33:51,672 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.1818181818181817) internal successors, (96), 44 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2025-03-03 13:33:51,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:33:51,673 INFO L225 Difference]: With dead ends: 127 [2025-03-03 13:33:51,673 INFO L226 Difference]: Without dead ends: 91 [2025-03-03 13:33:51,673 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 59 SyntacticMatches, 20 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1121 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=340, Invalid=1640, Unknown=0, NotChecked=0, Total=1980 [2025-03-03 13:33:51,673 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 374 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:33:51,673 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 194 Invalid, 374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 374 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:33:51,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2025-03-03 13:33:51,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 61. [2025-03-03 13:33:51,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.2166666666666666) internal successors, (73), 60 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:51,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 73 transitions. [2025-03-03 13:33:51,708 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 73 transitions. Word has length 49 [2025-03-03 13:33:51,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:33:51,708 INFO L471 AbstractCegarLoop]: Abstraction has 61 states and 73 transitions. [2025-03-03 13:33:51,708 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.1818181818181817) internal successors, (96), 44 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:51,708 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 73 transitions. [2025-03-03 13:33:51,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2025-03-03 13:33:51,708 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:33:51,708 INFO L218 NwaCegarLoop]: trace histogram [11, 10, 10, 7, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:33:51,714 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2025-03-03 13:33:51,908 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:33:51,909 INFO L396 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:33:51,909 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:33:51,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1222827147, now seen corresponding path program 43 times [2025-03-03 13:33:51,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:33:51,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731577222] [2025-03-03 13:33:51,909 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-03 13:33:51,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:33:51,912 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 49 statements into 1 equivalence classes. [2025-03-03 13:33:51,915 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 49 of 49 statements. [2025-03-03 13:33:51,915 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:33:51,915 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:33:52,101 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 127 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:52,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:33:52,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731577222] [2025-03-03 13:33:52,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731577222] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:33:52,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358248386] [2025-03-03 13:33:52,101 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-03 13:33:52,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:33:52,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:33:52,103 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:33:52,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2025-03-03 13:33:52,155 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 49 statements into 1 equivalence classes. [2025-03-03 13:33:52,168 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 49 of 49 statements. [2025-03-03 13:33:52,168 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:33:52,168 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:33:52,169 INFO L256 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 26 conjuncts are in the unsatisfiable core [2025-03-03 13:33:52,170 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:33:52,473 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 155 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:52,473 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:33:52,650 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 155 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:52,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358248386] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:33:52,650 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:33:52,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 43 [2025-03-03 13:33:52,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262129654] [2025-03-03 13:33:52,651 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:33:52,651 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2025-03-03 13:33:52,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:33:52,651 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2025-03-03 13:33:52,651 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=326, Invalid=1480, Unknown=0, NotChecked=0, Total=1806 [2025-03-03 13:33:52,651 INFO L87 Difference]: Start difference. First operand 61 states and 73 transitions. Second operand has 43 states, 43 states have (on average 2.2093023255813953) internal successors, (95), 43 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:52,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:33:52,886 INFO L93 Difference]: Finished difference Result 125 states and 138 transitions. [2025-03-03 13:33:52,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-03-03 13:33:52,886 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.2093023255813953) internal successors, (95), 43 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2025-03-03 13:33:52,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:33:52,886 INFO L225 Difference]: With dead ends: 125 [2025-03-03 13:33:52,886 INFO L226 Difference]: Without dead ends: 89 [2025-03-03 13:33:52,887 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 60 SyntacticMatches, 20 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1037 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=331, Invalid=1561, Unknown=0, NotChecked=0, Total=1892 [2025-03-03 13:33:52,887 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:33:52,887 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 169 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:33:52,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2025-03-03 13:33:52,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 61. [2025-03-03 13:33:52,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.2166666666666666) internal successors, (73), 60 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:52,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 73 transitions. [2025-03-03 13:33:52,919 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 73 transitions. Word has length 49 [2025-03-03 13:33:52,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:33:52,919 INFO L471 AbstractCegarLoop]: Abstraction has 61 states and 73 transitions. [2025-03-03 13:33:52,919 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.2093023255813953) internal successors, (95), 43 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:52,919 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 73 transitions. [2025-03-03 13:33:52,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2025-03-03 13:33:52,919 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:33:52,919 INFO L218 NwaCegarLoop]: trace histogram [11, 10, 10, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:33:52,926 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2025-03-03 13:33:53,120 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2025-03-03 13:33:53,120 INFO L396 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:33:53,120 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:33:53,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1109570389, now seen corresponding path program 44 times [2025-03-03 13:33:53,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:33:53,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286419817] [2025-03-03 13:33:53,120 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:33:53,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:33:53,124 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 49 statements into 2 equivalence classes. [2025-03-03 13:33:53,127 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 49 of 49 statements. [2025-03-03 13:33:53,127 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:33:53,127 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:33:53,316 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 127 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:53,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:33:53,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286419817] [2025-03-03 13:33:53,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286419817] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:33:53,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715114843] [2025-03-03 13:33:53,317 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:33:53,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:33:53,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:33:53,318 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:33:53,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2025-03-03 13:33:53,374 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 49 statements into 2 equivalence classes. [2025-03-03 13:33:53,387 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 49 of 49 statements. [2025-03-03 13:33:53,387 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:33:53,387 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:33:53,388 INFO L256 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 26 conjuncts are in the unsatisfiable core [2025-03-03 13:33:53,389 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:33:53,659 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 155 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:53,659 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:33:53,824 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 155 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:53,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715114843] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:33:53,824 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:33:53,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 42 [2025-03-03 13:33:53,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387798531] [2025-03-03 13:33:53,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:33:53,824 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2025-03-03 13:33:53,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:33:53,824 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2025-03-03 13:33:53,825 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=321, Invalid=1401, Unknown=0, NotChecked=0, Total=1722 [2025-03-03 13:33:53,825 INFO L87 Difference]: Start difference. First operand 61 states and 73 transitions. Second operand has 42 states, 42 states have (on average 2.238095238095238) internal successors, (94), 42 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:54,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:33:54,033 INFO L93 Difference]: Finished difference Result 121 states and 134 transitions. [2025-03-03 13:33:54,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-03-03 13:33:54,033 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.238095238095238) internal successors, (94), 42 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2025-03-03 13:33:54,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:33:54,033 INFO L225 Difference]: With dead ends: 121 [2025-03-03 13:33:54,033 INFO L226 Difference]: Without dead ends: 85 [2025-03-03 13:33:54,034 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 61 SyntacticMatches, 20 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 955 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=326, Invalid=1480, Unknown=0, NotChecked=0, Total=1806 [2025-03-03 13:33:54,034 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:33:54,034 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 157 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:33:54,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2025-03-03 13:33:54,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 61. [2025-03-03 13:33:54,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.2166666666666666) internal successors, (73), 60 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:54,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 73 transitions. [2025-03-03 13:33:54,066 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 73 transitions. Word has length 49 [2025-03-03 13:33:54,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:33:54,066 INFO L471 AbstractCegarLoop]: Abstraction has 61 states and 73 transitions. [2025-03-03 13:33:54,066 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.238095238095238) internal successors, (94), 42 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:54,066 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 73 transitions. [2025-03-03 13:33:54,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2025-03-03 13:33:54,066 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:33:54,067 INFO L218 NwaCegarLoop]: trace histogram [11, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:33:54,072 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2025-03-03 13:33:54,267 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:33:54,267 INFO L396 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:33:54,267 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:33:54,267 INFO L85 PathProgramCache]: Analyzing trace with hash 1170495627, now seen corresponding path program 45 times [2025-03-03 13:33:54,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:33:54,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670651796] [2025-03-03 13:33:54,267 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 13:33:54,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:33:54,271 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 49 statements into 11 equivalence classes. [2025-03-03 13:33:54,277 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) and asserted 49 of 49 statements. [2025-03-03 13:33:54,277 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2025-03-03 13:33:54,277 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:33:54,477 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 127 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:54,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:33:54,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670651796] [2025-03-03 13:33:54,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670651796] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:33:54,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48962628] [2025-03-03 13:33:54,477 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 13:33:54,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:33:54,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:33:54,479 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:33:54,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2025-03-03 13:33:54,532 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 49 statements into 11 equivalence classes. [2025-03-03 13:33:54,548 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) and asserted 49 of 49 statements. [2025-03-03 13:33:54,548 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2025-03-03 13:33:54,548 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:33:54,549 INFO L256 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 26 conjuncts are in the unsatisfiable core [2025-03-03 13:33:54,549 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:33:54,804 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 155 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:54,804 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:33:54,978 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 155 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:54,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48962628] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:33:54,978 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:33:54,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 41 [2025-03-03 13:33:54,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884457915] [2025-03-03 13:33:54,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:33:54,978 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2025-03-03 13:33:54,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:33:54,978 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2025-03-03 13:33:54,978 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=1320, Unknown=0, NotChecked=0, Total=1640 [2025-03-03 13:33:54,979 INFO L87 Difference]: Start difference. First operand 61 states and 73 transitions. Second operand has 41 states, 41 states have (on average 2.268292682926829) internal successors, (93), 41 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:55,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:33:55,160 INFO L93 Difference]: Finished difference Result 115 states and 128 transitions. [2025-03-03 13:33:55,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-03-03 13:33:55,161 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.268292682926829) internal successors, (93), 41 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2025-03-03 13:33:55,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:33:55,161 INFO L225 Difference]: With dead ends: 115 [2025-03-03 13:33:55,161 INFO L226 Difference]: Without dead ends: 79 [2025-03-03 13:33:55,161 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 62 SyntacticMatches, 20 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 875 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=325, Invalid=1397, Unknown=0, NotChecked=0, Total=1722 [2025-03-03 13:33:55,162 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:33:55,162 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 169 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:33:55,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2025-03-03 13:33:55,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 61. [2025-03-03 13:33:55,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.2166666666666666) internal successors, (73), 60 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:55,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 73 transitions. [2025-03-03 13:33:55,197 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 73 transitions. Word has length 49 [2025-03-03 13:33:55,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:33:55,197 INFO L471 AbstractCegarLoop]: Abstraction has 61 states and 73 transitions. [2025-03-03 13:33:55,197 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.268292682926829) internal successors, (93), 41 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:55,197 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 73 transitions. [2025-03-03 13:33:55,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2025-03-03 13:33:55,197 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:33:55,198 INFO L218 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:33:55,204 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2025-03-03 13:33:55,398 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:33:55,398 INFO L396 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:33:55,398 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:33:55,398 INFO L85 PathProgramCache]: Analyzing trace with hash 551309483, now seen corresponding path program 10 times [2025-03-03 13:33:55,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:33:55,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896379147] [2025-03-03 13:33:55,398 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 13:33:55,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:33:55,402 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 49 statements into 2 equivalence classes. [2025-03-03 13:33:55,407 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 49 of 49 statements. [2025-03-03 13:33:55,407 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-03 13:33:55,407 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:33:55,587 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 155 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:55,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:33:55,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896379147] [2025-03-03 13:33:55,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896379147] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:33:55,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300129370] [2025-03-03 13:33:55,588 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 13:33:55,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:33:55,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:33:55,589 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:33:55,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2025-03-03 13:33:55,642 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 49 statements into 2 equivalence classes. [2025-03-03 13:33:55,655 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 49 of 49 statements. [2025-03-03 13:33:55,655 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-03 13:33:55,655 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:33:55,656 INFO L256 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 26 conjuncts are in the unsatisfiable core [2025-03-03 13:33:55,656 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:33:55,903 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 155 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:55,903 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:33:56,050 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 155 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:56,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300129370] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:33:56,050 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:33:56,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 37 [2025-03-03 13:33:56,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657347361] [2025-03-03 13:33:56,050 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:33:56,050 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2025-03-03 13:33:56,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:33:56,051 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2025-03-03 13:33:56,051 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=1029, Unknown=0, NotChecked=0, Total=1332 [2025-03-03 13:33:56,051 INFO L87 Difference]: Start difference. First operand 61 states and 73 transitions. Second operand has 37 states, 37 states have (on average 2.2162162162162162) internal successors, (82), 37 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:56,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:33:56,176 INFO L93 Difference]: Finished difference Result 108 states and 122 transitions. [2025-03-03 13:33:56,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-03-03 13:33:56,177 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.2162162162162162) internal successors, (82), 37 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2025-03-03 13:33:56,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:33:56,177 INFO L225 Difference]: With dead ends: 108 [2025-03-03 13:33:56,177 INFO L226 Difference]: Without dead ends: 72 [2025-03-03 13:33:56,177 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 64 SyntacticMatches, 22 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 602 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=303, Invalid=1029, Unknown=0, NotChecked=0, Total=1332 [2025-03-03 13:33:56,178 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:33:56,178 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 114 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:33:56,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2025-03-03 13:33:56,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 62. [2025-03-03 13:33:56,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.2295081967213115) internal successors, (75), 61 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:56,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 75 transitions. [2025-03-03 13:33:56,211 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 75 transitions. Word has length 49 [2025-03-03 13:33:56,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:33:56,211 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 75 transitions. [2025-03-03 13:33:56,211 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.2162162162162162) internal successors, (82), 37 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:56,212 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 75 transitions. [2025-03-03 13:33:56,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2025-03-03 13:33:56,212 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:33:56,212 INFO L218 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:33:56,220 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2025-03-03 13:33:56,412 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2025-03-03 13:33:56,412 INFO L396 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:33:56,413 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:33:56,413 INFO L85 PathProgramCache]: Analyzing trace with hash -1389623527, now seen corresponding path program 20 times [2025-03-03 13:33:56,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:33:56,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668242094] [2025-03-03 13:33:56,413 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:33:56,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:33:56,417 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 50 statements into 2 equivalence classes. [2025-03-03 13:33:56,419 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 50 of 50 statements. [2025-03-03 13:33:56,420 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:33:56,420 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:33:56,528 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 55 proven. 166 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:56,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:33:56,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668242094] [2025-03-03 13:33:56,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668242094] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:33:56,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276682327] [2025-03-03 13:33:56,528 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:33:56,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:33:56,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:33:56,530 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:33:56,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2025-03-03 13:33:56,584 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 50 statements into 2 equivalence classes. [2025-03-03 13:33:56,598 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 50 of 50 statements. [2025-03-03 13:33:56,598 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:33:56,598 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:33:56,599 INFO L256 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 25 conjuncts are in the unsatisfiable core [2025-03-03 13:33:56,600 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:33:56,640 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 66 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:56,640 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:33:56,752 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 66 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:56,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276682327] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:33:56,752 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:33:56,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 17 [2025-03-03 13:33:56,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067932869] [2025-03-03 13:33:56,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:33:56,752 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-03-03 13:33:56,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:33:56,752 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-03-03 13:33:56,752 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2025-03-03 13:33:56,753 INFO L87 Difference]: Start difference. First operand 62 states and 75 transitions. Second operand has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:56,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:33:56,888 INFO L93 Difference]: Finished difference Result 73 states and 86 transitions. [2025-03-03 13:33:56,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2025-03-03 13:33:56,888 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2025-03-03 13:33:56,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:33:56,889 INFO L225 Difference]: With dead ends: 73 [2025-03-03 13:33:56,889 INFO L226 Difference]: Without dead ends: 71 [2025-03-03 13:33:56,889 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 85 SyntacticMatches, 23 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=275, Invalid=481, Unknown=0, NotChecked=0, Total=756 [2025-03-03 13:33:56,889 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 19 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:33:56,889 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 101 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:33:56,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2025-03-03 13:33:56,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 65. [2025-03-03 13:33:56,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.21875) internal successors, (78), 64 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:56,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 78 transitions. [2025-03-03 13:33:56,922 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 78 transitions. Word has length 50 [2025-03-03 13:33:56,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:33:56,922 INFO L471 AbstractCegarLoop]: Abstraction has 65 states and 78 transitions. [2025-03-03 13:33:56,922 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:56,922 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 78 transitions. [2025-03-03 13:33:56,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2025-03-03 13:33:56,922 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:33:56,922 INFO L218 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:33:56,928 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2025-03-03 13:33:57,123 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2025-03-03 13:33:57,123 INFO L396 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:33:57,123 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:33:57,123 INFO L85 PathProgramCache]: Analyzing trace with hash 916114321, now seen corresponding path program 21 times [2025-03-03 13:33:57,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:33:57,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722220577] [2025-03-03 13:33:57,123 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 13:33:57,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:33:57,128 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 53 statements into 12 equivalence classes. [2025-03-03 13:33:57,133 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) and asserted 53 of 53 statements. [2025-03-03 13:33:57,134 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2025-03-03 13:33:57,134 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:33:57,393 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 156 proven. 97 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:57,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:33:57,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722220577] [2025-03-03 13:33:57,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722220577] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:33:57,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301081926] [2025-03-03 13:33:57,393 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 13:33:57,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:33:57,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:33:57,395 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:33:57,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2025-03-03 13:33:57,450 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 53 statements into 12 equivalence classes. [2025-03-03 13:33:57,467 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) and asserted 53 of 53 statements. [2025-03-03 13:33:57,467 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2025-03-03 13:33:57,467 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:33:57,468 INFO L256 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 28 conjuncts are in the unsatisfiable core [2025-03-03 13:33:57,469 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:33:57,906 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 187 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:57,906 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:33:58,119 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 187 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:58,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301081926] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:33:58,119 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:33:58,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 54 [2025-03-03 13:33:58,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338439238] [2025-03-03 13:33:58,119 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:33:58,119 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2025-03-03 13:33:58,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:33:58,120 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2025-03-03 13:33:58,120 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=551, Invalid=2311, Unknown=0, NotChecked=0, Total=2862 [2025-03-03 13:33:58,120 INFO L87 Difference]: Start difference. First operand 65 states and 78 transitions. Second operand has 54 states, 54 states have (on average 2.0185185185185186) internal successors, (109), 54 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:58,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:33:58,279 INFO L93 Difference]: Finished difference Result 115 states and 129 transitions. [2025-03-03 13:33:58,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2025-03-03 13:33:58,279 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.0185185185185186) internal successors, (109), 54 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2025-03-03 13:33:58,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:33:58,279 INFO L225 Difference]: With dead ends: 115 [2025-03-03 13:33:58,279 INFO L226 Difference]: Without dead ends: 76 [2025-03-03 13:33:58,280 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 57 SyntacticMatches, 22 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1934 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=556, Invalid=2414, Unknown=0, NotChecked=0, Total=2970 [2025-03-03 13:33:58,280 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:33:58,280 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 146 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:33:58,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2025-03-03 13:33:58,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 66. [2025-03-03 13:33:58,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.2153846153846153) internal successors, (79), 65 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:58,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 79 transitions. [2025-03-03 13:33:58,319 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 79 transitions. Word has length 53 [2025-03-03 13:33:58,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:33:58,319 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 79 transitions. [2025-03-03 13:33:58,319 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.0185185185185186) internal successors, (109), 54 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:58,320 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 79 transitions. [2025-03-03 13:33:58,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2025-03-03 13:33:58,320 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:33:58,320 INFO L218 NwaCegarLoop]: trace histogram [12, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:33:58,326 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2025-03-03 13:33:58,520 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:33:58,520 INFO L396 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:33:58,520 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:33:58,520 INFO L85 PathProgramCache]: Analyzing trace with hash 1877935985, now seen corresponding path program 46 times [2025-03-03 13:33:58,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:33:58,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673355592] [2025-03-03 13:33:58,521 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 13:33:58,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:33:58,525 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 53 statements into 2 equivalence classes. [2025-03-03 13:33:58,530 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 53 of 53 statements. [2025-03-03 13:33:58,531 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-03 13:33:58,531 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:33:58,777 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 187 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:58,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:33:58,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673355592] [2025-03-03 13:33:58,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673355592] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:33:58,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639661960] [2025-03-03 13:33:58,777 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 13:33:58,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:33:58,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:33:58,779 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:33:58,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2025-03-03 13:33:58,833 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 53 statements into 2 equivalence classes. [2025-03-03 13:33:58,848 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 53 of 53 statements. [2025-03-03 13:33:58,848 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-03 13:33:58,848 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:33:58,848 INFO L256 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 28 conjuncts are in the unsatisfiable core [2025-03-03 13:33:58,849 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:33:59,234 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 187 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:59,234 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:33:59,416 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 187 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:33:59,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639661960] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:33:59,416 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:33:59,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 50 [2025-03-03 13:33:59,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828051934] [2025-03-03 13:33:59,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:33:59,417 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2025-03-03 13:33:59,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:33:59,417 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2025-03-03 13:33:59,417 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=484, Invalid=1966, Unknown=0, NotChecked=0, Total=2450 [2025-03-03 13:33:59,417 INFO L87 Difference]: Start difference. First operand 66 states and 79 transitions. Second operand has 50 states, 50 states have (on average 1.98) internal successors, (99), 50 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:59,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:33:59,627 INFO L93 Difference]: Finished difference Result 124 states and 138 transitions. [2025-03-03 13:33:59,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2025-03-03 13:33:59,628 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.98) internal successors, (99), 50 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2025-03-03 13:33:59,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:33:59,628 INFO L225 Difference]: With dead ends: 124 [2025-03-03 13:33:59,628 INFO L226 Difference]: Without dead ends: 85 [2025-03-03 13:33:59,628 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 59 SyntacticMatches, 24 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1507 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=484, Invalid=1966, Unknown=0, NotChecked=0, Total=2450 [2025-03-03 13:33:59,629 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:33:59,629 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 202 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:33:59,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2025-03-03 13:33:59,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 66. [2025-03-03 13:33:59,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.2153846153846153) internal successors, (79), 65 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:59,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 79 transitions. [2025-03-03 13:33:59,671 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 79 transitions. Word has length 53 [2025-03-03 13:33:59,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:33:59,671 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 79 transitions. [2025-03-03 13:33:59,672 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.98) internal successors, (99), 50 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:33:59,672 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 79 transitions. [2025-03-03 13:33:59,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2025-03-03 13:33:59,672 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:33:59,672 INFO L218 NwaCegarLoop]: trace histogram [12, 11, 11, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:33:59,678 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2025-03-03 13:33:59,872 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:33:59,872 INFO L396 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:33:59,872 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:33:59,872 INFO L85 PathProgramCache]: Analyzing trace with hash 523489169, now seen corresponding path program 47 times [2025-03-03 13:33:59,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:33:59,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92359744] [2025-03-03 13:33:59,873 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 13:33:59,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:33:59,876 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 53 statements into 12 equivalence classes. [2025-03-03 13:33:59,881 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) and asserted 53 of 53 statements. [2025-03-03 13:33:59,881 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2025-03-03 13:33:59,881 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:34:00,094 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 187 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:34:00,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:34:00,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92359744] [2025-03-03 13:34:00,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92359744] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:34:00,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190771215] [2025-03-03 13:34:00,095 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 13:34:00,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:34:00,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:34:00,096 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:34:00,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2025-03-03 13:34:00,152 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 53 statements into 12 equivalence classes. [2025-03-03 13:34:00,169 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) and asserted 53 of 53 statements. [2025-03-03 13:34:00,170 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2025-03-03 13:34:00,170 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:34:00,170 INFO L256 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 28 conjuncts are in the unsatisfiable core [2025-03-03 13:34:00,171 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:34:00,535 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 187 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:34:00,535 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:34:00,718 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 187 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:34:00,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190771215] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:34:00,718 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:34:00,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 49 [2025-03-03 13:34:00,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806279264] [2025-03-03 13:34:00,718 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:34:00,719 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2025-03-03 13:34:00,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:34:00,719 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2025-03-03 13:34:00,719 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=453, Invalid=1899, Unknown=0, NotChecked=0, Total=2352 [2025-03-03 13:34:00,719 INFO L87 Difference]: Start difference. First operand 66 states and 79 transitions. Second operand has 49 states, 49 states have (on average 2.0) internal successors, (98), 49 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:34:00,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:34:00,929 INFO L93 Difference]: Finished difference Result 131 states and 145 transitions. [2025-03-03 13:34:00,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2025-03-03 13:34:00,929 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.0) internal successors, (98), 49 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2025-03-03 13:34:00,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:34:00,929 INFO L225 Difference]: With dead ends: 131 [2025-03-03 13:34:00,929 INFO L226 Difference]: Without dead ends: 92 [2025-03-03 13:34:00,930 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 60 SyntacticMatches, 24 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1419 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=453, Invalid=1899, Unknown=0, NotChecked=0, Total=2352 [2025-03-03 13:34:00,930 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:34:00,930 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 110 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:34:00,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2025-03-03 13:34:00,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 66. [2025-03-03 13:34:00,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.2153846153846153) internal successors, (79), 65 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:34:00,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 79 transitions. [2025-03-03 13:34:00,977 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 79 transitions. Word has length 53 [2025-03-03 13:34:00,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:34:00,977 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 79 transitions. [2025-03-03 13:34:00,977 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.0) internal successors, (98), 49 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:34:00,978 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 79 transitions. [2025-03-03 13:34:00,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2025-03-03 13:34:00,978 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:34:00,978 INFO L218 NwaCegarLoop]: trace histogram [12, 11, 11, 8, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:34:00,984 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2025-03-03 13:34:01,178 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2025-03-03 13:34:01,178 INFO L396 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:34:01,178 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:34:01,178 INFO L85 PathProgramCache]: Analyzing trace with hash 1311081329, now seen corresponding path program 48 times [2025-03-03 13:34:01,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:34:01,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483870061] [2025-03-03 13:34:01,179 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-03 13:34:01,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:34:01,182 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 53 statements into 12 equivalence classes. [2025-03-03 13:34:01,187 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) and asserted 53 of 53 statements. [2025-03-03 13:34:01,187 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2025-03-03 13:34:01,187 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:34:01,418 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 156 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:34:01,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:34:01,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483870061] [2025-03-03 13:34:01,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483870061] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:34:01,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173572158] [2025-03-03 13:34:01,419 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-03 13:34:01,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:34:01,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:34:01,420 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:34:01,421 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2025-03-03 13:34:01,477 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 53 statements into 12 equivalence classes. [2025-03-03 13:34:01,495 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) and asserted 53 of 53 statements. [2025-03-03 13:34:01,495 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2025-03-03 13:34:01,495 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:34:01,495 INFO L256 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 28 conjuncts are in the unsatisfiable core [2025-03-03 13:34:01,496 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:34:01,869 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 187 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:34:01,869 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:34:02,063 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 187 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:34:02,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173572158] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:34:02,063 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:34:02,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 51 [2025-03-03 13:34:02,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700053794] [2025-03-03 13:34:02,063 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:34:02,063 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2025-03-03 13:34:02,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:34:02,064 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2025-03-03 13:34:02,064 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=455, Invalid=2095, Unknown=0, NotChecked=0, Total=2550 [2025-03-03 13:34:02,064 INFO L87 Difference]: Start difference. First operand 66 states and 79 transitions. Second operand has 51 states, 51 states have (on average 2.0980392156862746) internal successors, (107), 51 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:34:02,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:34:02,343 INFO L93 Difference]: Finished difference Result 136 states and 150 transitions. [2025-03-03 13:34:02,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2025-03-03 13:34:02,343 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.0980392156862746) internal successors, (107), 51 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2025-03-03 13:34:02,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:34:02,344 INFO L225 Difference]: With dead ends: 136 [2025-03-03 13:34:02,344 INFO L226 Difference]: Without dead ends: 97 [2025-03-03 13:34:02,344 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 60 SyntacticMatches, 22 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1668 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=460, Invalid=2192, Unknown=0, NotChecked=0, Total=2652 [2025-03-03 13:34:02,344 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 345 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:34:02,344 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 177 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 345 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:34:02,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2025-03-03 13:34:02,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 66. [2025-03-03 13:34:02,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.2153846153846153) internal successors, (79), 65 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:34:02,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 79 transitions. [2025-03-03 13:34:02,394 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 79 transitions. Word has length 53 [2025-03-03 13:34:02,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:34:02,394 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 79 transitions. [2025-03-03 13:34:02,394 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.0980392156862746) internal successors, (107), 51 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:34:02,394 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 79 transitions. [2025-03-03 13:34:02,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2025-03-03 13:34:02,394 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:34:02,394 INFO L218 NwaCegarLoop]: trace histogram [12, 11, 11, 7, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:34:02,401 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2025-03-03 13:34:02,594 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:34:02,594 INFO L396 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:34:02,595 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:34:02,595 INFO L85 PathProgramCache]: Analyzing trace with hash -1573006447, now seen corresponding path program 49 times [2025-03-03 13:34:02,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:34:02,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048359235] [2025-03-03 13:34:02,595 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-03 13:34:02,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:34:02,598 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 53 statements into 1 equivalence classes. [2025-03-03 13:34:02,601 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 53 of 53 statements. [2025-03-03 13:34:02,601 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:34:02,601 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:34:02,818 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 156 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:34:02,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:34:02,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048359235] [2025-03-03 13:34:02,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048359235] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:34:02,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403008369] [2025-03-03 13:34:02,818 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-03 13:34:02,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:34:02,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:34:02,820 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:34:02,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2025-03-03 13:34:02,878 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 53 statements into 1 equivalence classes. [2025-03-03 13:34:02,894 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 53 of 53 statements. [2025-03-03 13:34:02,894 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:34:02,894 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:34:02,895 INFO L256 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 28 conjuncts are in the unsatisfiable core [2025-03-03 13:34:02,896 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:34:03,252 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 187 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:34:03,253 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:34:03,443 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 187 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:34:03,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403008369] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:34:03,443 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:34:03,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 50 [2025-03-03 13:34:03,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125450007] [2025-03-03 13:34:03,443 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:34:03,443 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2025-03-03 13:34:03,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:34:03,443 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2025-03-03 13:34:03,444 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=431, Invalid=2019, Unknown=0, NotChecked=0, Total=2450 [2025-03-03 13:34:03,444 INFO L87 Difference]: Start difference. First operand 66 states and 79 transitions. Second operand has 50 states, 50 states have (on average 2.12) internal successors, (106), 50 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:34:03,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:34:03,765 INFO L93 Difference]: Finished difference Result 139 states and 153 transitions. [2025-03-03 13:34:03,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2025-03-03 13:34:03,765 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.12) internal successors, (106), 50 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2025-03-03 13:34:03,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:34:03,766 INFO L225 Difference]: With dead ends: 139 [2025-03-03 13:34:03,766 INFO L226 Difference]: Without dead ends: 100 [2025-03-03 13:34:03,766 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 61 SyntacticMatches, 22 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1569 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=436, Invalid=2114, Unknown=0, NotChecked=0, Total=2550 [2025-03-03 13:34:03,766 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:34:03,766 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 206 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 400 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:34:03,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2025-03-03 13:34:03,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 66. [2025-03-03 13:34:03,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.2153846153846153) internal successors, (79), 65 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:34:03,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 79 transitions. [2025-03-03 13:34:03,814 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 79 transitions. Word has length 53 [2025-03-03 13:34:03,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:34:03,814 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 79 transitions. [2025-03-03 13:34:03,814 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.12) internal successors, (106), 50 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:34:03,814 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 79 transitions. [2025-03-03 13:34:03,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2025-03-03 13:34:03,815 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:34:03,815 INFO L218 NwaCegarLoop]: trace histogram [12, 11, 11, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:34:03,821 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2025-03-03 13:34:04,015 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:34:04,015 INFO L396 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:34:04,015 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:34:04,015 INFO L85 PathProgramCache]: Analyzing trace with hash -3473551, now seen corresponding path program 50 times [2025-03-03 13:34:04,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:34:04,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547447315] [2025-03-03 13:34:04,016 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:34:04,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:34:04,019 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 53 statements into 2 equivalence classes. [2025-03-03 13:34:04,022 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 53 of 53 statements. [2025-03-03 13:34:04,022 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:34:04,023 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:34:04,241 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 156 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:34:04,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:34:04,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547447315] [2025-03-03 13:34:04,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547447315] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:34:04,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209997595] [2025-03-03 13:34:04,241 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:34:04,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:34:04,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:34:04,243 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:34:04,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2025-03-03 13:34:04,302 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 53 statements into 2 equivalence classes. [2025-03-03 13:34:04,316 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 53 of 53 statements. [2025-03-03 13:34:04,316 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:34:04,316 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:34:04,317 INFO L256 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 28 conjuncts are in the unsatisfiable core [2025-03-03 13:34:04,318 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:34:04,663 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 187 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:34:04,663 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:34:04,852 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 187 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:34:04,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209997595] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:34:04,852 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:34:04,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 49 [2025-03-03 13:34:04,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936679570] [2025-03-03 13:34:04,852 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:34:04,853 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2025-03-03 13:34:04,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:34:04,853 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2025-03-03 13:34:04,853 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=1941, Unknown=0, NotChecked=0, Total=2352 [2025-03-03 13:34:04,853 INFO L87 Difference]: Start difference. First operand 66 states and 79 transitions. Second operand has 49 states, 49 states have (on average 2.142857142857143) internal successors, (105), 49 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:34:05,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:34:05,175 INFO L93 Difference]: Finished difference Result 140 states and 154 transitions. [2025-03-03 13:34:05,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2025-03-03 13:34:05,175 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.142857142857143) internal successors, (105), 49 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2025-03-03 13:34:05,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:34:05,176 INFO L225 Difference]: With dead ends: 140 [2025-03-03 13:34:05,176 INFO L226 Difference]: Without dead ends: 101 [2025-03-03 13:34:05,176 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 62 SyntacticMatches, 22 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1472 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=416, Invalid=2034, Unknown=0, NotChecked=0, Total=2450 [2025-03-03 13:34:05,176 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:34:05,176 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 210 Invalid, 407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 407 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:34:05,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2025-03-03 13:34:05,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 66. [2025-03-03 13:34:05,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.2153846153846153) internal successors, (79), 65 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:34:05,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 79 transitions. [2025-03-03 13:34:05,224 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 79 transitions. Word has length 53 [2025-03-03 13:34:05,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:34:05,224 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 79 transitions. [2025-03-03 13:34:05,224 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.142857142857143) internal successors, (105), 49 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:34:05,224 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 79 transitions. [2025-03-03 13:34:05,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2025-03-03 13:34:05,225 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:34:05,225 INFO L218 NwaCegarLoop]: trace histogram [12, 11, 11, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:34:05,231 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2025-03-03 13:34:05,425 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable82 [2025-03-03 13:34:05,425 INFO L396 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:34:05,425 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:34:05,425 INFO L85 PathProgramCache]: Analyzing trace with hash -1476864111, now seen corresponding path program 51 times [2025-03-03 13:34:05,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:34:05,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277028591] [2025-03-03 13:34:05,426 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 13:34:05,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:34:05,429 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 53 statements into 12 equivalence classes. [2025-03-03 13:34:05,433 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) and asserted 53 of 53 statements. [2025-03-03 13:34:05,433 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2025-03-03 13:34:05,433 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:34:05,659 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 156 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:34:05,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:34:05,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277028591] [2025-03-03 13:34:05,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277028591] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:34:05,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796683823] [2025-03-03 13:34:05,660 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 13:34:05,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:34:05,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:34:05,661 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:34:05,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2025-03-03 13:34:05,723 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 53 statements into 12 equivalence classes. [2025-03-03 13:34:05,741 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) and asserted 53 of 53 statements. [2025-03-03 13:34:05,741 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2025-03-03 13:34:05,741 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:34:05,742 INFO L256 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 28 conjuncts are in the unsatisfiable core [2025-03-03 13:34:05,742 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:34:06,078 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 187 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:34:06,078 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:34:06,271 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 187 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:34:06,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796683823] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:34:06,271 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:34:06,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 48 [2025-03-03 13:34:06,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339943139] [2025-03-03 13:34:06,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:34:06,272 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2025-03-03 13:34:06,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:34:06,272 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2025-03-03 13:34:06,272 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=395, Invalid=1861, Unknown=0, NotChecked=0, Total=2256 [2025-03-03 13:34:06,272 INFO L87 Difference]: Start difference. First operand 66 states and 79 transitions. Second operand has 48 states, 48 states have (on average 2.1666666666666665) internal successors, (104), 48 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:34:06,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:34:06,572 INFO L93 Difference]: Finished difference Result 141 states and 155 transitions. [2025-03-03 13:34:06,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2025-03-03 13:34:06,572 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.1666666666666665) internal successors, (104), 48 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2025-03-03 13:34:06,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:34:06,573 INFO L225 Difference]: With dead ends: 141 [2025-03-03 13:34:06,573 INFO L226 Difference]: Without dead ends: 102 [2025-03-03 13:34:06,573 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 63 SyntacticMatches, 22 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1377 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=400, Invalid=1952, Unknown=0, NotChecked=0, Total=2352 [2025-03-03 13:34:06,573 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:34:06,573 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 145 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:34:06,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2025-03-03 13:34:06,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 66. [2025-03-03 13:34:06,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.2153846153846153) internal successors, (79), 65 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:34:06,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 79 transitions. [2025-03-03 13:34:06,622 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 79 transitions. Word has length 53 [2025-03-03 13:34:06,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:34:06,622 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 79 transitions. [2025-03-03 13:34:06,622 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.1666666666666665) internal successors, (104), 48 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:34:06,622 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 79 transitions. [2025-03-03 13:34:06,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2025-03-03 13:34:06,622 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:34:06,622 INFO L218 NwaCegarLoop]: trace histogram [12, 11, 11, 7, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:34:06,628 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2025-03-03 13:34:06,822 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:34:06,823 INFO L396 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:34:06,823 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:34:06,823 INFO L85 PathProgramCache]: Analyzing trace with hash -1801487503, now seen corresponding path program 52 times [2025-03-03 13:34:06,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:34:06,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882695252] [2025-03-03 13:34:06,823 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 13:34:06,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:34:06,826 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 53 statements into 2 equivalence classes. [2025-03-03 13:34:06,830 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 53 of 53 statements. [2025-03-03 13:34:06,830 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-03 13:34:06,830 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:34:07,039 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 187 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:34:07,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:34:07,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882695252] [2025-03-03 13:34:07,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882695252] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:34:07,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329243936] [2025-03-03 13:34:07,039 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 13:34:07,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:34:07,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:34:07,041 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:34:07,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2025-03-03 13:34:07,110 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 53 statements into 2 equivalence classes. [2025-03-03 13:34:07,125 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 53 of 53 statements. [2025-03-03 13:34:07,125 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-03 13:34:07,125 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:34:07,125 INFO L256 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 28 conjuncts are in the unsatisfiable core [2025-03-03 13:34:07,126 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:34:07,454 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 187 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:34:07,454 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:34:07,630 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 187 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:34:07,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329243936] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:34:07,630 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:34:07,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 44 [2025-03-03 13:34:07,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182992015] [2025-03-03 13:34:07,630 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:34:07,630 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2025-03-03 13:34:07,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:34:07,631 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2025-03-03 13:34:07,631 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=358, Invalid=1534, Unknown=0, NotChecked=0, Total=1892 [2025-03-03 13:34:07,631 INFO L87 Difference]: Start difference. First operand 66 states and 79 transitions. Second operand has 44 states, 44 states have (on average 2.1136363636363638) internal successors, (93), 44 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:34:07,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:34:07,911 INFO L93 Difference]: Finished difference Result 140 states and 154 transitions. [2025-03-03 13:34:07,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2025-03-03 13:34:07,912 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.1136363636363638) internal successors, (93), 44 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2025-03-03 13:34:07,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:34:07,912 INFO L225 Difference]: With dead ends: 140 [2025-03-03 13:34:07,912 INFO L226 Difference]: Without dead ends: 101 [2025-03-03 13:34:07,912 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 65 SyntacticMatches, 24 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1009 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=358, Invalid=1534, Unknown=0, NotChecked=0, Total=1892 [2025-03-03 13:34:07,912 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:34:07,913 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 119 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:34:07,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2025-03-03 13:34:07,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 66. [2025-03-03 13:34:07,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.2153846153846153) internal successors, (79), 65 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:34:07,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 79 transitions. [2025-03-03 13:34:07,961 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 79 transitions. Word has length 53 [2025-03-03 13:34:07,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:34:07,962 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 79 transitions. [2025-03-03 13:34:07,962 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.1136363636363638) internal successors, (93), 44 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:34:07,962 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 79 transitions. [2025-03-03 13:34:07,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2025-03-03 13:34:07,962 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:34:07,962 INFO L218 NwaCegarLoop]: trace histogram [12, 11, 11, 8, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:34:07,968 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2025-03-03 13:34:08,162 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:34:08,162 INFO L396 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:34:08,163 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:34:08,163 INFO L85 PathProgramCache]: Analyzing trace with hash 681892753, now seen corresponding path program 53 times [2025-03-03 13:34:08,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:34:08,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870526237] [2025-03-03 13:34:08,163 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 13:34:08,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:34:08,167 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 53 statements into 12 equivalence classes. [2025-03-03 13:34:08,172 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) and asserted 53 of 53 statements. [2025-03-03 13:34:08,172 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2025-03-03 13:34:08,172 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:34:08,383 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 187 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:34:08,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:34:08,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870526237] [2025-03-03 13:34:08,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870526237] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:34:08,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852508538] [2025-03-03 13:34:08,383 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 13:34:08,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:34:08,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:34:08,386 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:34:08,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2025-03-03 13:34:08,446 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 53 statements into 12 equivalence classes. [2025-03-03 13:34:08,464 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) and asserted 53 of 53 statements. [2025-03-03 13:34:08,464 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2025-03-03 13:34:08,464 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:34:08,465 INFO L256 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 28 conjuncts are in the unsatisfiable core [2025-03-03 13:34:08,465 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:34:08,784 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 187 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:34:08,785 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:34:08,949 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 187 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:34:08,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852508538] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:34:08,950 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:34:08,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 43 [2025-03-03 13:34:08,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127496051] [2025-03-03 13:34:08,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:34:08,950 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2025-03-03 13:34:08,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:34:08,950 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2025-03-03 13:34:08,950 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=1455, Unknown=0, NotChecked=0, Total=1806 [2025-03-03 13:34:08,950 INFO L87 Difference]: Start difference. First operand 66 states and 79 transitions. Second operand has 43 states, 43 states have (on average 2.13953488372093) internal successors, (92), 43 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:34:09,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:34:09,227 INFO L93 Difference]: Finished difference Result 137 states and 151 transitions. [2025-03-03 13:34:09,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2025-03-03 13:34:09,227 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.13953488372093) internal successors, (92), 43 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2025-03-03 13:34:09,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:34:09,228 INFO L225 Difference]: With dead ends: 137 [2025-03-03 13:34:09,228 INFO L226 Difference]: Without dead ends: 98 [2025-03-03 13:34:09,228 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 66 SyntacticMatches, 24 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 933 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=351, Invalid=1455, Unknown=0, NotChecked=0, Total=1806 [2025-03-03 13:34:09,228 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:34:09,228 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 135 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:34:09,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2025-03-03 13:34:09,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 66. [2025-03-03 13:34:09,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.2153846153846153) internal successors, (79), 65 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:34:09,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 79 transitions. [2025-03-03 13:34:09,278 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 79 transitions. Word has length 53 [2025-03-03 13:34:09,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:34:09,278 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 79 transitions. [2025-03-03 13:34:09,278 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.13953488372093) internal successors, (92), 43 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:34:09,278 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 79 transitions. [2025-03-03 13:34:09,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2025-03-03 13:34:09,278 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:34:09,278 INFO L218 NwaCegarLoop]: trace histogram [12, 11, 11, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:34:09,285 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2025-03-03 13:34:09,479 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:34:09,479 INFO L396 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:34:09,479 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:34:09,479 INFO L85 PathProgramCache]: Analyzing trace with hash 207812465, now seen corresponding path program 54 times [2025-03-03 13:34:09,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:34:09,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545904059] [2025-03-03 13:34:09,480 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-03 13:34:09,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:34:09,484 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 53 statements into 12 equivalence classes. [2025-03-03 13:34:09,501 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) and asserted 53 of 53 statements. [2025-03-03 13:34:09,501 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2025-03-03 13:34:09,501 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:34:09,716 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 156 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:34:09,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:34:09,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545904059] [2025-03-03 13:34:09,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545904059] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:34:09,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809449815] [2025-03-03 13:34:09,716 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-03 13:34:09,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:34:09,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:34:09,718 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:34:09,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2025-03-03 13:34:09,779 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 53 statements into 12 equivalence classes. [2025-03-03 13:34:09,797 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) and asserted 53 of 53 statements. [2025-03-03 13:34:09,797 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2025-03-03 13:34:09,797 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:34:09,798 INFO L256 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 28 conjuncts are in the unsatisfiable core [2025-03-03 13:34:09,799 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:34:10,113 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 187 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:34:10,113 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:34:10,299 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 187 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:34:10,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809449815] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:34:10,299 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:34:10,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 45 [2025-03-03 13:34:10,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794856248] [2025-03-03 13:34:10,299 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:34:10,299 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2025-03-03 13:34:10,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:34:10,299 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2025-03-03 13:34:10,299 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=371, Invalid=1609, Unknown=0, NotChecked=0, Total=1980 [2025-03-03 13:34:10,300 INFO L87 Difference]: Start difference. First operand 66 states and 79 transitions. Second operand has 45 states, 45 states have (on average 2.2444444444444445) internal successors, (101), 45 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:34:10,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:34:10,558 INFO L93 Difference]: Finished difference Result 132 states and 146 transitions. [2025-03-03 13:34:10,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2025-03-03 13:34:10,558 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.2444444444444445) internal successors, (101), 45 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2025-03-03 13:34:10,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:34:10,559 INFO L225 Difference]: With dead ends: 132 [2025-03-03 13:34:10,559 INFO L226 Difference]: Without dead ends: 93 [2025-03-03 13:34:10,559 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 66 SyntacticMatches, 22 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1104 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=376, Invalid=1694, Unknown=0, NotChecked=0, Total=2070 [2025-03-03 13:34:10,559 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:34:10,559 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 141 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:34:10,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2025-03-03 13:34:10,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 66. [2025-03-03 13:34:10,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.2153846153846153) internal successors, (79), 65 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:34:10,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 79 transitions. [2025-03-03 13:34:10,609 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 79 transitions. Word has length 53 [2025-03-03 13:34:10,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:34:10,609 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 79 transitions. [2025-03-03 13:34:10,609 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.2444444444444445) internal successors, (101), 45 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:34:10,609 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 79 transitions. [2025-03-03 13:34:10,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2025-03-03 13:34:10,609 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:34:10,609 INFO L218 NwaCegarLoop]: trace histogram [12, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:34:10,616 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Ended with exit code 0 [2025-03-03 13:34:10,810 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:34:10,810 INFO L396 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:34:10,810 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:34:10,810 INFO L85 PathProgramCache]: Analyzing trace with hash 746708881, now seen corresponding path program 55 times [2025-03-03 13:34:10,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:34:10,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114203246] [2025-03-03 13:34:10,810 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-03 13:34:10,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:34:10,814 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 53 statements into 1 equivalence classes. [2025-03-03 13:34:10,816 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 53 of 53 statements. [2025-03-03 13:34:10,817 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:34:10,817 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:34:11,033 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 156 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:34:11,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:34:11,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114203246] [2025-03-03 13:34:11,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114203246] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:34:11,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541462457] [2025-03-03 13:34:11,033 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-03 13:34:11,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:34:11,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:34:11,035 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:34:11,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2025-03-03 13:34:11,097 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 53 statements into 1 equivalence classes. [2025-03-03 13:34:11,111 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 53 of 53 statements. [2025-03-03 13:34:11,111 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:34:11,111 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:34:11,111 INFO L256 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 28 conjuncts are in the unsatisfiable core [2025-03-03 13:34:11,112 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:34:11,417 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 187 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:34:11,417 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:34:11,610 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 187 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:34:11,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541462457] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:34:11,610 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:34:11,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 44 [2025-03-03 13:34:11,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520110451] [2025-03-03 13:34:11,610 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:34:11,610 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2025-03-03 13:34:11,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:34:11,611 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2025-03-03 13:34:11,611 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=371, Invalid=1521, Unknown=0, NotChecked=0, Total=1892 [2025-03-03 13:34:11,611 INFO L87 Difference]: Start difference. First operand 66 states and 79 transitions. Second operand has 44 states, 44 states have (on average 2.272727272727273) internal successors, (100), 44 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:34:11,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:34:11,877 INFO L93 Difference]: Finished difference Result 125 states and 139 transitions. [2025-03-03 13:34:11,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2025-03-03 13:34:11,877 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.272727272727273) internal successors, (100), 44 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2025-03-03 13:34:11,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:34:11,877 INFO L225 Difference]: With dead ends: 125 [2025-03-03 13:34:11,877 INFO L226 Difference]: Without dead ends: 86 [2025-03-03 13:34:11,878 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 67 SyntacticMatches, 22 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1017 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=376, Invalid=1604, Unknown=0, NotChecked=0, Total=1980 [2025-03-03 13:34:11,878 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 459 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:34:11,878 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 239 Invalid, 459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 459 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:34:11,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2025-03-03 13:34:11,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 66. [2025-03-03 13:34:11,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.2153846153846153) internal successors, (79), 65 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:34:11,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 79 transitions. [2025-03-03 13:34:11,928 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 79 transitions. Word has length 53 [2025-03-03 13:34:11,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:34:11,928 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 79 transitions. [2025-03-03 13:34:11,928 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.272727272727273) internal successors, (100), 44 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:34:11,929 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 79 transitions. [2025-03-03 13:34:11,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2025-03-03 13:34:11,929 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:34:11,929 INFO L218 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:34:11,935 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2025-03-03 13:34:12,129 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:34:12,129 INFO L396 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:34:12,129 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:34:12,130 INFO L85 PathProgramCache]: Analyzing trace with hash 1456829297, now seen corresponding path program 11 times [2025-03-03 13:34:12,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:34:12,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947293984] [2025-03-03 13:34:12,130 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 13:34:12,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:34:12,137 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 53 statements into 12 equivalence classes. [2025-03-03 13:34:12,142 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) and asserted 53 of 53 statements. [2025-03-03 13:34:12,142 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2025-03-03 13:34:12,142 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:34:12,392 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 187 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:34:12,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:34:12,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947293984] [2025-03-03 13:34:12,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947293984] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:34:12,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096469563] [2025-03-03 13:34:12,392 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 13:34:12,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:34:12,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:34:12,394 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:34:12,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2025-03-03 13:34:12,457 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 53 statements into 12 equivalence classes. [2025-03-03 13:34:12,474 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) and asserted 53 of 53 statements. [2025-03-03 13:34:12,474 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2025-03-03 13:34:12,474 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:34:12,475 INFO L256 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 28 conjuncts are in the unsatisfiable core [2025-03-03 13:34:12,476 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:34:12,758 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 187 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:34:12,758 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:34:12,934 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 187 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:34:12,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096469563] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:34:12,935 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:34:12,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 40 [2025-03-03 13:34:12,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223511495] [2025-03-03 13:34:12,935 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:34:12,935 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2025-03-03 13:34:12,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:34:12,935 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2025-03-03 13:34:12,935 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=354, Invalid=1206, Unknown=0, NotChecked=0, Total=1560 [2025-03-03 13:34:12,935 INFO L87 Difference]: Start difference. First operand 66 states and 79 transitions. Second operand has 40 states, 40 states have (on average 2.225) internal successors, (89), 40 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:34:13,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:34:13,112 INFO L93 Difference]: Finished difference Result 117 states and 132 transitions. [2025-03-03 13:34:13,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2025-03-03 13:34:13,112 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.225) internal successors, (89), 40 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2025-03-03 13:34:13,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:34:13,112 INFO L225 Difference]: With dead ends: 117 [2025-03-03 13:34:13,112 INFO L226 Difference]: Without dead ends: 78 [2025-03-03 13:34:13,113 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 69 SyntacticMatches, 24 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 717 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=354, Invalid=1206, Unknown=0, NotChecked=0, Total=1560 [2025-03-03 13:34:13,113 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:34:13,113 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 132 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:34:13,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2025-03-03 13:34:13,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 67. [2025-03-03 13:34:13,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.2272727272727273) internal successors, (81), 66 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:34:13,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 81 transitions. [2025-03-03 13:34:13,166 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 81 transitions. Word has length 53 [2025-03-03 13:34:13,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:34:13,166 INFO L471 AbstractCegarLoop]: Abstraction has 67 states and 81 transitions. [2025-03-03 13:34:13,166 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.225) internal successors, (89), 40 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:34:13,166 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 81 transitions. [2025-03-03 13:34:13,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2025-03-03 13:34:13,166 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:34:13,166 INFO L218 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:34:13,172 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2025-03-03 13:34:13,367 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2025-03-03 13:34:13,367 INFO L396 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:34:13,367 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:34:13,367 INFO L85 PathProgramCache]: Analyzing trace with hash 68464383, now seen corresponding path program 22 times [2025-03-03 13:34:13,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:34:13,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812050881] [2025-03-03 13:34:13,367 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 13:34:13,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:34:13,371 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 54 statements into 2 equivalence classes. [2025-03-03 13:34:13,375 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 54 of 54 statements. [2025-03-03 13:34:13,375 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-03 13:34:13,375 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:34:13,502 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 78 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:34:13,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:34:13,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812050881] [2025-03-03 13:34:13,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812050881] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:34:13,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603259945] [2025-03-03 13:34:13,503 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 13:34:13,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:34:13,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:34:13,504 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:34:13,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2025-03-03 13:34:13,568 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 54 statements into 2 equivalence classes. [2025-03-03 13:34:13,583 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 54 of 54 statements. [2025-03-03 13:34:13,583 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-03 13:34:13,583 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:34:13,584 INFO L256 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 30 conjuncts are in the unsatisfiable core [2025-03-03 13:34:13,585 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:34:13,633 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 78 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:34:13,633 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:34:13,760 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 78 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:34:13,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603259945] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:34:13,760 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:34:13,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 17 [2025-03-03 13:34:13,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251695981] [2025-03-03 13:34:13,760 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:34:13,760 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-03-03 13:34:13,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:34:13,760 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-03-03 13:34:13,760 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=162, Unknown=0, NotChecked=0, Total=272 [2025-03-03 13:34:13,760 INFO L87 Difference]: Start difference. First operand 67 states and 81 transitions. Second operand has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:34:13,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:34:13,908 INFO L93 Difference]: Finished difference Result 78 states and 92 transitions. [2025-03-03 13:34:13,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2025-03-03 13:34:13,908 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2025-03-03 13:34:13,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:34:13,909 INFO L225 Difference]: With dead ends: 78 [2025-03-03 13:34:13,909 INFO L226 Difference]: Without dead ends: 76 [2025-03-03 13:34:13,909 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 94 SyntacticMatches, 24 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=314, Invalid=498, Unknown=0, NotChecked=0, Total=812 [2025-03-03 13:34:13,909 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 20 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:34:13,909 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 72 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:34:13,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2025-03-03 13:34:13,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 70. [2025-03-03 13:34:13,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.2173913043478262) internal successors, (84), 69 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:34:13,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 84 transitions. [2025-03-03 13:34:13,960 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 84 transitions. Word has length 54 [2025-03-03 13:34:13,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:34:13,960 INFO L471 AbstractCegarLoop]: Abstraction has 70 states and 84 transitions. [2025-03-03 13:34:13,960 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:34:13,960 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 84 transitions. [2025-03-03 13:34:13,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2025-03-03 13:34:13,960 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:34:13,960 INFO L218 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:34:13,966 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2025-03-03 13:34:14,160 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2025-03-03 13:34:14,161 INFO L396 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:34:14,161 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:34:14,161 INFO L85 PathProgramCache]: Analyzing trace with hash -486190613, now seen corresponding path program 23 times [2025-03-03 13:34:14,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:34:14,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798451728] [2025-03-03 13:34:14,161 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 13:34:14,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:34:14,165 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 57 statements into 13 equivalence classes. [2025-03-03 13:34:14,170 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) and asserted 57 of 57 statements. [2025-03-03 13:34:14,170 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2025-03-03 13:34:14,170 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:34:14,426 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 222 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:34:14,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:34:14,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798451728] [2025-03-03 13:34:14,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798451728] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:34:14,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212910108] [2025-03-03 13:34:14,426 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 13:34:14,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:34:14,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:34:14,428 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:34:14,428 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2025-03-03 13:34:14,492 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 57 statements into 13 equivalence classes. [2025-03-03 13:34:14,511 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) and asserted 57 of 57 statements. [2025-03-03 13:34:14,512 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2025-03-03 13:34:14,512 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:34:14,512 INFO L256 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 30 conjuncts are in the unsatisfiable core [2025-03-03 13:34:14,513 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:34:14,976 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 222 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:34:14,976 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:34:15,187 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 222 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:34:15,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212910108] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:34:15,187 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:34:15,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 56 [2025-03-03 13:34:15,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609154643] [2025-03-03 13:34:15,187 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:34:15,188 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2025-03-03 13:34:15,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:34:15,188 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2025-03-03 13:34:15,188 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=604, Invalid=2476, Unknown=0, NotChecked=0, Total=3080 [2025-03-03 13:34:15,188 INFO L87 Difference]: Start difference. First operand 70 states and 84 transitions. Second operand has 56 states, 56 states have (on average 2.0) internal successors, (112), 56 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:34:15,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:34:15,372 INFO L93 Difference]: Finished difference Result 124 states and 139 transitions. [2025-03-03 13:34:15,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2025-03-03 13:34:15,372 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.0) internal successors, (112), 56 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2025-03-03 13:34:15,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:34:15,373 INFO L225 Difference]: With dead ends: 124 [2025-03-03 13:34:15,373 INFO L226 Difference]: Without dead ends: 82 [2025-03-03 13:34:15,373 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 61 SyntacticMatches, 26 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2011 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=604, Invalid=2476, Unknown=0, NotChecked=0, Total=3080 [2025-03-03 13:34:15,373 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:34:15,373 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 136 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:34:15,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2025-03-03 13:34:15,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 71. [2025-03-03 13:34:15,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.2142857142857142) internal successors, (85), 70 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:34:15,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 85 transitions. [2025-03-03 13:34:15,433 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 85 transitions. Word has length 57 [2025-03-03 13:34:15,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:34:15,434 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 85 transitions. [2025-03-03 13:34:15,434 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.0) internal successors, (112), 56 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:34:15,434 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 85 transitions. [2025-03-03 13:34:15,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2025-03-03 13:34:15,434 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:34:15,434 INFO L218 NwaCegarLoop]: trace histogram [13, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:34:15,442 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2025-03-03 13:34:15,634 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:34:15,635 INFO L396 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:34:15,635 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:34:15,635 INFO L85 PathProgramCache]: Analyzing trace with hash -1642553909, now seen corresponding path program 56 times [2025-03-03 13:34:15,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:34:15,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326988757] [2025-03-03 13:34:15,635 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:34:15,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:34:15,639 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 57 statements into 2 equivalence classes. [2025-03-03 13:34:15,642 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 57 of 57 statements. [2025-03-03 13:34:15,642 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:34:15,642 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:34:15,899 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 188 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:34:15,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:34:15,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326988757] [2025-03-03 13:34:15,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326988757] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:34:15,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862903529] [2025-03-03 13:34:15,900 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:34:15,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:34:15,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:34:15,901 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:34:15,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2025-03-03 13:34:15,967 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 57 statements into 2 equivalence classes. [2025-03-03 13:34:15,982 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 57 of 57 statements. [2025-03-03 13:34:15,982 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:34:15,982 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:34:15,983 INFO L256 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 30 conjuncts are in the unsatisfiable core [2025-03-03 13:34:15,983 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:34:16,431 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 222 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:34:16,431 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:34:16,654 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 222 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:34:16,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862903529] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:34:16,655 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:34:16,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 57 [2025-03-03 13:34:16,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882417337] [2025-03-03 13:34:16,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:34:16,655 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2025-03-03 13:34:16,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:34:16,655 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2025-03-03 13:34:16,655 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=596, Invalid=2596, Unknown=0, NotChecked=0, Total=3192 [2025-03-03 13:34:16,656 INFO L87 Difference]: Start difference. First operand 71 states and 85 transitions. Second operand has 57 states, 57 states have (on average 2.0526315789473686) internal successors, (117), 57 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:34:16,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:34:16,948 INFO L93 Difference]: Finished difference Result 134 states and 149 transitions. [2025-03-03 13:34:16,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2025-03-03 13:34:16,949 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.0526315789473686) internal successors, (117), 57 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2025-03-03 13:34:16,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:34:16,949 INFO L225 Difference]: With dead ends: 134 [2025-03-03 13:34:16,949 INFO L226 Difference]: Without dead ends: 92 [2025-03-03 13:34:16,950 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 62 SyntacticMatches, 24 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2199 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=601, Invalid=2705, Unknown=0, NotChecked=0, Total=3306 [2025-03-03 13:34:16,950 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 428 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:34:16,950 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 217 Invalid, 428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 428 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:34:16,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2025-03-03 13:34:17,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 71. [2025-03-03 13:34:17,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.2142857142857142) internal successors, (85), 70 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:34:17,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 85 transitions. [2025-03-03 13:34:17,016 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 85 transitions. Word has length 57 [2025-03-03 13:34:17,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:34:17,016 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 85 transitions. [2025-03-03 13:34:17,016 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.0526315789473686) internal successors, (117), 57 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:34:17,016 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 85 transitions. [2025-03-03 13:34:17,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2025-03-03 13:34:17,016 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:34:17,016 INFO L218 NwaCegarLoop]: trace histogram [13, 12, 12, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:34:17,023 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2025-03-03 13:34:17,216 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:34:17,217 INFO L396 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:34:17,217 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:34:17,217 INFO L85 PathProgramCache]: Analyzing trace with hash 259806699, now seen corresponding path program 57 times [2025-03-03 13:34:17,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:34:17,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722072850] [2025-03-03 13:34:17,217 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 13:34:17,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:34:17,221 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 57 statements into 13 equivalence classes. [2025-03-03 13:34:17,226 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) and asserted 57 of 57 statements. [2025-03-03 13:34:17,226 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2025-03-03 13:34:17,226 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:34:17,498 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 188 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:34:17,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:34:17,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722072850] [2025-03-03 13:34:17,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722072850] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:34:17,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330898390] [2025-03-03 13:34:17,498 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 13:34:17,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:34:17,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:34:17,500 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:34:17,501 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2025-03-03 13:34:17,565 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 57 statements into 13 equivalence classes. [2025-03-03 13:34:17,585 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) and asserted 57 of 57 statements. [2025-03-03 13:34:17,585 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2025-03-03 13:34:17,585 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:34:17,586 INFO L256 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 30 conjuncts are in the unsatisfiable core [2025-03-03 13:34:17,587 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:34:18,065 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 222 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:34:18,065 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:34:18,285 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 222 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:34:18,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330898390] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:34:18,286 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:34:18,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 56 [2025-03-03 13:34:18,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183099909] [2025-03-03 13:34:18,286 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:34:18,286 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2025-03-03 13:34:18,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:34:18,286 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2025-03-03 13:34:18,286 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=2519, Unknown=0, NotChecked=0, Total=3080 [2025-03-03 13:34:18,286 INFO L87 Difference]: Start difference. First operand 71 states and 85 transitions. Second operand has 56 states, 56 states have (on average 2.0714285714285716) internal successors, (116), 56 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:34:18,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:34:18,645 INFO L93 Difference]: Finished difference Result 142 states and 157 transitions. [2025-03-03 13:34:18,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2025-03-03 13:34:18,646 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.0714285714285716) internal successors, (116), 56 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2025-03-03 13:34:18,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:34:18,646 INFO L225 Difference]: With dead ends: 142 [2025-03-03 13:34:18,646 INFO L226 Difference]: Without dead ends: 100 [2025-03-03 13:34:18,647 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 63 SyntacticMatches, 24 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2087 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=566, Invalid=2626, Unknown=0, NotChecked=0, Total=3192 [2025-03-03 13:34:18,647 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:34:18,647 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 246 Invalid, 488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 488 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:34:18,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2025-03-03 13:34:18,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 71. [2025-03-03 13:34:18,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.2142857142857142) internal successors, (85), 70 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:34:18,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 85 transitions. [2025-03-03 13:34:18,715 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 85 transitions. Word has length 57 [2025-03-03 13:34:18,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:34:18,716 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 85 transitions. [2025-03-03 13:34:18,716 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.0714285714285716) internal successors, (116), 56 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:34:18,716 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 85 transitions. [2025-03-03 13:34:18,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2025-03-03 13:34:18,716 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:34:18,716 INFO L218 NwaCegarLoop]: trace histogram [13, 12, 12, 9, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:34:18,723 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2025-03-03 13:34:18,916 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:34:18,916 INFO L396 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:34:18,917 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:34:18,917 INFO L85 PathProgramCache]: Analyzing trace with hash 1152457163, now seen corresponding path program 58 times [2025-03-03 13:34:18,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:34:18,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859772743] [2025-03-03 13:34:18,917 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 13:34:18,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:34:18,921 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 57 statements into 2 equivalence classes. [2025-03-03 13:34:18,924 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 57 of 57 statements. [2025-03-03 13:34:18,924 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-03 13:34:18,924 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:34:19,170 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 222 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:34:19,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:34:19,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859772743] [2025-03-03 13:34:19,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859772743] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:34:19,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667458926] [2025-03-03 13:34:19,170 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 13:34:19,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:34:19,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:34:19,173 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:34:19,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2025-03-03 13:34:19,240 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 57 statements into 2 equivalence classes. [2025-03-03 13:34:19,258 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 57 of 57 statements. [2025-03-03 13:34:19,258 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-03 13:34:19,258 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:34:19,259 INFO L256 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 30 conjuncts are in the unsatisfiable core [2025-03-03 13:34:19,260 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:34:19,674 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 222 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:34:19,674 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:34:19,874 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 222 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:34:19,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667458926] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:34:19,874 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:34:19,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 52 [2025-03-03 13:34:19,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171262538] [2025-03-03 13:34:19,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:34:19,874 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2025-03-03 13:34:19,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:34:19,874 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2025-03-03 13:34:19,875 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=499, Invalid=2153, Unknown=0, NotChecked=0, Total=2652 [2025-03-03 13:34:19,875 INFO L87 Difference]: Start difference. First operand 71 states and 85 transitions. Second operand has 52 states, 52 states have (on average 2.019230769230769) internal successors, (105), 52 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:34:20,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:34:20,262 INFO L93 Difference]: Finished difference Result 148 states and 163 transitions. [2025-03-03 13:34:20,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2025-03-03 13:34:20,266 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.019230769230769) internal successors, (105), 52 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2025-03-03 13:34:20,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:34:20,266 INFO L225 Difference]: With dead ends: 148 [2025-03-03 13:34:20,267 INFO L226 Difference]: Without dead ends: 106 [2025-03-03 13:34:20,267 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 65 SyntacticMatches, 26 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1598 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=499, Invalid=2153, Unknown=0, NotChecked=0, Total=2652 [2025-03-03 13:34:20,267 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:34:20,267 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 202 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 398 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:34:20,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2025-03-03 13:34:20,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 71. [2025-03-03 13:34:20,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.2142857142857142) internal successors, (85), 70 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:34:20,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 85 transitions. [2025-03-03 13:34:20,339 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 85 transitions. Word has length 57 [2025-03-03 13:34:20,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:34:20,340 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 85 transitions. [2025-03-03 13:34:20,340 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.019230769230769) internal successors, (105), 52 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:34:20,340 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 85 transitions. [2025-03-03 13:34:20,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2025-03-03 13:34:20,340 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:34:20,340 INFO L218 NwaCegarLoop]: trace histogram [13, 12, 12, 8, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:34:20,346 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2025-03-03 13:34:20,540 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:34:20,540 INFO L396 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:34:20,541 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:34:20,541 INFO L85 PathProgramCache]: Analyzing trace with hash 904157675, now seen corresponding path program 59 times [2025-03-03 13:34:20,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:34:20,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431724125] [2025-03-03 13:34:20,541 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 13:34:20,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:34:20,545 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 57 statements into 13 equivalence classes. [2025-03-03 13:34:20,550 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) and asserted 57 of 57 statements. [2025-03-03 13:34:20,550 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2025-03-03 13:34:20,550 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:34:20,798 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 222 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:34:20,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:34:20,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431724125] [2025-03-03 13:34:20,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431724125] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:34:20,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541066999] [2025-03-03 13:34:20,799 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 13:34:20,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:34:20,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:34:20,800 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:34:20,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2025-03-03 13:34:20,867 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 57 statements into 13 equivalence classes. [2025-03-03 13:34:20,887 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) and asserted 57 of 57 statements. [2025-03-03 13:34:20,887 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2025-03-03 13:34:20,887 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:34:20,888 INFO L256 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 30 conjuncts are in the unsatisfiable core [2025-03-03 13:34:20,888 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:34:21,286 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 222 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:34:21,286 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:34:21,487 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 222 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:34:21,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541066999] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:34:21,487 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:34:21,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 51 [2025-03-03 13:34:21,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142026772] [2025-03-03 13:34:21,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:34:21,488 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2025-03-03 13:34:21,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:34:21,488 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2025-03-03 13:34:21,488 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=473, Invalid=2077, Unknown=0, NotChecked=0, Total=2550 [2025-03-03 13:34:21,488 INFO L87 Difference]: Start difference. First operand 71 states and 85 transitions. Second operand has 51 states, 51 states have (on average 2.0392156862745097) internal successors, (104), 51 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:34:21,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:34:21,898 INFO L93 Difference]: Finished difference Result 152 states and 167 transitions. [2025-03-03 13:34:21,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2025-03-03 13:34:21,898 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.0392156862745097) internal successors, (104), 51 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2025-03-03 13:34:21,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:34:21,899 INFO L225 Difference]: With dead ends: 152 [2025-03-03 13:34:21,899 INFO L226 Difference]: Without dead ends: 110 [2025-03-03 13:34:21,899 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 66 SyntacticMatches, 26 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1506 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=473, Invalid=2077, Unknown=0, NotChecked=0, Total=2550 [2025-03-03 13:34:21,899 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:34:21,899 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 170 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:34:21,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2025-03-03 13:34:21,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 71. [2025-03-03 13:34:21,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.2142857142857142) internal successors, (85), 70 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:34:21,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 85 transitions. [2025-03-03 13:34:21,972 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 85 transitions. Word has length 57 [2025-03-03 13:34:21,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:34:21,972 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 85 transitions. [2025-03-03 13:34:21,973 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.0392156862745097) internal successors, (104), 51 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:34:21,973 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 85 transitions. [2025-03-03 13:34:21,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2025-03-03 13:34:21,973 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:34:21,973 INFO L218 NwaCegarLoop]: trace histogram [13, 12, 12, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:34:21,979 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2025-03-03 13:34:22,173 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:34:22,173 INFO L396 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:34:22,174 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:34:22,174 INFO L85 PathProgramCache]: Analyzing trace with hash 1865979339, now seen corresponding path program 60 times [2025-03-03 13:34:22,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:34:22,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790688304] [2025-03-03 13:34:22,174 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-03 13:34:22,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:34:22,178 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 57 statements into 13 equivalence classes. [2025-03-03 13:34:22,183 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) and asserted 57 of 57 statements. [2025-03-03 13:34:22,183 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2025-03-03 13:34:22,183 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:34:22,441 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 188 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:34:22,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:34:22,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790688304] [2025-03-03 13:34:22,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790688304] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:34:22,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280220146] [2025-03-03 13:34:22,441 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-03 13:34:22,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:34:22,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:34:22,443 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:34:22,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2025-03-03 13:34:22,515 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 57 statements into 13 equivalence classes. [2025-03-03 13:34:22,536 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) and asserted 57 of 57 statements. [2025-03-03 13:34:22,536 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2025-03-03 13:34:22,536 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:34:22,537 INFO L256 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 30 conjuncts are in the unsatisfiable core [2025-03-03 13:34:22,538 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:34:22,944 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 222 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:34:22,944 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:34:23,170 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 222 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:34:23,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280220146] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:34:23,170 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:34:23,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 53 [2025-03-03 13:34:23,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55526583] [2025-03-03 13:34:23,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:34:23,170 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2025-03-03 13:34:23,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:34:23,171 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2025-03-03 13:34:23,171 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=480, Invalid=2276, Unknown=0, NotChecked=0, Total=2756 [2025-03-03 13:34:23,171 INFO L87 Difference]: Start difference. First operand 71 states and 85 transitions. Second operand has 53 states, 53 states have (on average 2.1320754716981134) internal successors, (113), 53 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:34:23,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:34:23,607 INFO L93 Difference]: Finished difference Result 154 states and 169 transitions. [2025-03-03 13:34:23,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2025-03-03 13:34:23,607 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.1320754716981134) internal successors, (113), 53 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2025-03-03 13:34:23,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:34:23,608 INFO L225 Difference]: With dead ends: 154 [2025-03-03 13:34:23,608 INFO L226 Difference]: Without dead ends: 112 [2025-03-03 13:34:23,608 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 66 SyntacticMatches, 24 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1763 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=485, Invalid=2377, Unknown=0, NotChecked=0, Total=2862 [2025-03-03 13:34:23,608 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:34:23,608 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 142 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:34:23,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2025-03-03 13:34:23,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 71. [2025-03-03 13:34:23,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.2142857142857142) internal successors, (85), 70 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:34:23,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 85 transitions. [2025-03-03 13:34:23,682 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 85 transitions. Word has length 57 [2025-03-03 13:34:23,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:34:23,682 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 85 transitions. [2025-03-03 13:34:23,682 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.1320754716981134) internal successors, (113), 53 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:34:23,682 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 85 transitions. [2025-03-03 13:34:23,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2025-03-03 13:34:23,682 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:34:23,682 INFO L218 NwaCegarLoop]: trace histogram [13, 12, 12, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:34:23,689 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Ended with exit code 0 [2025-03-03 13:34:23,882 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2025-03-03 13:34:23,883 INFO L396 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:34:23,883 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:34:23,883 INFO L85 PathProgramCache]: Analyzing trace with hash 511532523, now seen corresponding path program 61 times [2025-03-03 13:34:23,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:34:23,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380735189] [2025-03-03 13:34:23,883 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-03 13:34:23,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:34:23,887 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 57 statements into 1 equivalence classes. [2025-03-03 13:34:23,890 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 57 of 57 statements. [2025-03-03 13:34:23,890 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:34:23,890 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:34:24,138 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 188 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:34:24,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:34:24,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380735189] [2025-03-03 13:34:24,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380735189] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:34:24,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559275051] [2025-03-03 13:34:24,138 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-03 13:34:24,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:34:24,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:34:24,140 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:34:24,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2025-03-03 13:34:24,210 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 57 statements into 1 equivalence classes. [2025-03-03 13:34:24,225 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 57 of 57 statements. [2025-03-03 13:34:24,225 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:34:24,225 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:34:24,226 INFO L256 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 30 conjuncts are in the unsatisfiable core [2025-03-03 13:34:24,227 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:34:24,615 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 222 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:34:24,615 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:34:24,832 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 222 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:34:24,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559275051] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:34:24,833 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:34:24,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 52 [2025-03-03 13:34:24,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901745357] [2025-03-03 13:34:24,833 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:34:24,833 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2025-03-03 13:34:24,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:34:24,833 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2025-03-03 13:34:24,833 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=461, Invalid=2191, Unknown=0, NotChecked=0, Total=2652 [2025-03-03 13:34:24,833 INFO L87 Difference]: Start difference. First operand 71 states and 85 transitions. Second operand has 52 states, 52 states have (on average 2.1538461538461537) internal successors, (112), 52 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:34:25,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:34:25,290 INFO L93 Difference]: Finished difference Result 155 states and 170 transitions. [2025-03-03 13:34:25,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2025-03-03 13:34:25,290 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.1538461538461537) internal successors, (112), 52 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2025-03-03 13:34:25,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:34:25,291 INFO L225 Difference]: With dead ends: 155 [2025-03-03 13:34:25,291 INFO L226 Difference]: Without dead ends: 113 [2025-03-03 13:34:25,291 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 67 SyntacticMatches, 24 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1659 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=466, Invalid=2290, Unknown=0, NotChecked=0, Total=2756 [2025-03-03 13:34:25,291 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:34:25,291 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 148 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:34:25,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2025-03-03 13:34:25,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 71. [2025-03-03 13:34:25,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.2142857142857142) internal successors, (85), 70 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:34:25,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 85 transitions. [2025-03-03 13:34:25,367 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 85 transitions. Word has length 57 [2025-03-03 13:34:25,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:34:25,367 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 85 transitions. [2025-03-03 13:34:25,367 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.1538461538461537) internal successors, (112), 52 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:34:25,367 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 85 transitions. [2025-03-03 13:34:25,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2025-03-03 13:34:25,367 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:34:25,367 INFO L218 NwaCegarLoop]: trace histogram [13, 12, 12, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:34:25,373 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2025-03-03 13:34:25,568 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:34:25,568 INFO L396 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:34:25,568 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:34:25,568 INFO L85 PathProgramCache]: Analyzing trace with hash 1299124683, now seen corresponding path program 62 times [2025-03-03 13:34:25,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:34:25,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786448485] [2025-03-03 13:34:25,568 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:34:25,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:34:25,572 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 57 statements into 2 equivalence classes. [2025-03-03 13:34:25,576 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 57 of 57 statements. [2025-03-03 13:34:25,576 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:34:25,576 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:34:25,820 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 188 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:34:25,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:34:25,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786448485] [2025-03-03 13:34:25,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786448485] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:34:25,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644085687] [2025-03-03 13:34:25,820 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:34:25,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:34:25,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:34:25,822 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:34:25,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2025-03-03 13:34:25,891 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 57 statements into 2 equivalence classes. [2025-03-03 13:34:25,906 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 57 of 57 statements. [2025-03-03 13:34:25,906 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:34:25,906 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:34:25,907 INFO L256 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 30 conjuncts are in the unsatisfiable core [2025-03-03 13:34:25,907 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:34:26,279 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 222 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:34:26,279 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:34:26,489 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 222 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:34:26,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644085687] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:34:26,490 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:34:26,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 51 [2025-03-03 13:34:26,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208213754] [2025-03-03 13:34:26,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:34:26,490 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2025-03-03 13:34:26,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:34:26,490 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2025-03-03 13:34:26,490 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=446, Invalid=2104, Unknown=0, NotChecked=0, Total=2550 [2025-03-03 13:34:26,491 INFO L87 Difference]: Start difference. First operand 71 states and 85 transitions. Second operand has 51 states, 51 states have (on average 2.176470588235294) internal successors, (111), 51 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:34:26,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:34:26,958 INFO L93 Difference]: Finished difference Result 155 states and 170 transitions. [2025-03-03 13:34:26,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2025-03-03 13:34:26,959 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.176470588235294) internal successors, (111), 51 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2025-03-03 13:34:26,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:34:26,959 INFO L225 Difference]: With dead ends: 155 [2025-03-03 13:34:26,959 INFO L226 Difference]: Without dead ends: 113 [2025-03-03 13:34:26,960 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 68 SyntacticMatches, 24 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1557 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=451, Invalid=2201, Unknown=0, NotChecked=0, Total=2652 [2025-03-03 13:34:26,960 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:34:26,960 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 203 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 399 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:34:26,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2025-03-03 13:34:27,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 71. [2025-03-03 13:34:27,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.2142857142857142) internal successors, (85), 70 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:34:27,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 85 transitions. [2025-03-03 13:34:27,035 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 85 transitions. Word has length 57 [2025-03-03 13:34:27,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:34:27,035 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 85 transitions. [2025-03-03 13:34:27,035 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.176470588235294) internal successors, (111), 51 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:34:27,035 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 85 transitions. [2025-03-03 13:34:27,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2025-03-03 13:34:27,035 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:34:27,035 INFO L218 NwaCegarLoop]: trace histogram [13, 12, 12, 8, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:34:27,042 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Ended with exit code 0 [2025-03-03 13:34:27,235 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:34:27,237 INFO L396 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:34:27,237 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:34:27,237 INFO L85 PathProgramCache]: Analyzing trace with hash -1584963093, now seen corresponding path program 63 times [2025-03-03 13:34:27,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:34:27,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427510545] [2025-03-03 13:34:27,237 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 13:34:27,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:34:27,242 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 57 statements into 13 equivalence classes. [2025-03-03 13:34:27,246 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) and asserted 57 of 57 statements. [2025-03-03 13:34:27,246 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2025-03-03 13:34:27,246 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:34:27,527 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 188 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:34:27,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:34:27,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427510545] [2025-03-03 13:34:27,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427510545] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:34:27,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527213298] [2025-03-03 13:34:27,527 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 13:34:27,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:34:27,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:34:27,529 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:34:27,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2025-03-03 13:34:27,600 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 57 statements into 13 equivalence classes. [2025-03-03 13:34:27,619 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) and asserted 57 of 57 statements. [2025-03-03 13:34:27,619 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2025-03-03 13:34:27,619 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:34:27,620 INFO L256 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 30 conjuncts are in the unsatisfiable core [2025-03-03 13:34:27,621 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:34:27,982 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 222 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:34:27,982 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:34:28,191 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 222 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:34:28,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527213298] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:34:28,191 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:34:28,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 50 [2025-03-03 13:34:28,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033373652] [2025-03-03 13:34:28,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:34:28,191 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2025-03-03 13:34:28,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:34:28,191 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2025-03-03 13:34:28,191 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=2015, Unknown=0, NotChecked=0, Total=2450 [2025-03-03 13:34:28,192 INFO L87 Difference]: Start difference. First operand 71 states and 85 transitions. Second operand has 50 states, 50 states have (on average 2.2) internal successors, (110), 50 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:34:28,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:34:28,645 INFO L93 Difference]: Finished difference Result 153 states and 168 transitions. [2025-03-03 13:34:28,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2025-03-03 13:34:28,645 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.2) internal successors, (110), 50 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2025-03-03 13:34:28,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:34:28,646 INFO L225 Difference]: With dead ends: 153 [2025-03-03 13:34:28,646 INFO L226 Difference]: Without dead ends: 111 [2025-03-03 13:34:28,646 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 69 SyntacticMatches, 24 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1457 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=440, Invalid=2110, Unknown=0, NotChecked=0, Total=2550 [2025-03-03 13:34:28,646 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:34:28,646 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 188 Invalid, 371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 371 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:34:28,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2025-03-03 13:34:28,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 71. [2025-03-03 13:34:28,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.2142857142857142) internal successors, (85), 70 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:34:28,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 85 transitions. [2025-03-03 13:34:28,723 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 85 transitions. Word has length 57 [2025-03-03 13:34:28,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:34:28,723 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 85 transitions. [2025-03-03 13:34:28,723 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.2) internal successors, (110), 50 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:34:28,724 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 85 transitions. [2025-03-03 13:34:28,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2025-03-03 13:34:28,724 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:34:28,724 INFO L218 NwaCegarLoop]: trace histogram [13, 12, 12, 9, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:34:28,730 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2025-03-03 13:34:28,924 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2025-03-03 13:34:28,924 INFO L396 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:34:28,924 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:34:28,924 INFO L85 PathProgramCache]: Analyzing trace with hash -15430197, now seen corresponding path program 64 times [2025-03-03 13:34:28,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:34:28,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299172584] [2025-03-03 13:34:28,925 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 13:34:28,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:34:28,928 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 57 statements into 2 equivalence classes. [2025-03-03 13:34:28,932 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 57 of 57 statements. [2025-03-03 13:34:28,932 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-03 13:34:28,932 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:34:29,165 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 222 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:34:29,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:34:29,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299172584] [2025-03-03 13:34:29,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299172584] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:34:29,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053724236] [2025-03-03 13:34:29,165 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 13:34:29,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:34:29,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:34:29,167 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:34:29,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2025-03-03 13:34:29,238 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 57 statements into 2 equivalence classes. [2025-03-03 13:34:29,254 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 57 of 57 statements. [2025-03-03 13:34:29,254 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-03 13:34:29,254 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:34:29,254 INFO L256 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 30 conjuncts are in the unsatisfiable core [2025-03-03 13:34:29,255 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:34:29,664 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 222 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:34:29,664 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:34:29,852 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 222 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:34:29,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053724236] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:34:29,852 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:34:29,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 46 [2025-03-03 13:34:29,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962292285] [2025-03-03 13:34:29,852 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:34:29,852 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2025-03-03 13:34:29,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:34:29,853 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2025-03-03 13:34:29,853 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=403, Invalid=1667, Unknown=0, NotChecked=0, Total=2070 [2025-03-03 13:34:29,853 INFO L87 Difference]: Start difference. First operand 71 states and 85 transitions. Second operand has 46 states, 46 states have (on average 2.152173913043478) internal successors, (99), 46 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:34:30,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:34:30,261 INFO L93 Difference]: Finished difference Result 149 states and 164 transitions. [2025-03-03 13:34:30,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2025-03-03 13:34:30,261 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.152173913043478) internal successors, (99), 46 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2025-03-03 13:34:30,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:34:30,262 INFO L225 Difference]: With dead ends: 149 [2025-03-03 13:34:30,262 INFO L226 Difference]: Without dead ends: 107 [2025-03-03 13:34:30,262 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 71 SyntacticMatches, 26 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1076 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=403, Invalid=1667, Unknown=0, NotChecked=0, Total=2070 [2025-03-03 13:34:30,262 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:34:30,262 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 175 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 343 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:34:30,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2025-03-03 13:34:30,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 71. [2025-03-03 13:34:30,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.2142857142857142) internal successors, (85), 70 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:34:30,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 85 transitions. [2025-03-03 13:34:30,339 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 85 transitions. Word has length 57 [2025-03-03 13:34:30,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:34:30,339 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 85 transitions. [2025-03-03 13:34:30,339 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.152173913043478) internal successors, (99), 46 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:34:30,339 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 85 transitions. [2025-03-03 13:34:30,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2025-03-03 13:34:30,339 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:34:30,340 INFO L218 NwaCegarLoop]: trace histogram [13, 12, 12, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:34:30,345 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Forceful destruction successful, exit code 0 [2025-03-03 13:34:30,540 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:34:30,540 INFO L396 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:34:30,540 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:34:30,540 INFO L85 PathProgramCache]: Analyzing trace with hash -1488820757, now seen corresponding path program 65 times [2025-03-03 13:34:30,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:34:30,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49315886] [2025-03-03 13:34:30,540 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 13:34:30,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:34:30,544 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 57 statements into 13 equivalence classes. [2025-03-03 13:34:30,549 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) and asserted 57 of 57 statements. [2025-03-03 13:34:30,550 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2025-03-03 13:34:30,550 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:34:30,793 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 222 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:34:30,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:34:30,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49315886] [2025-03-03 13:34:30,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49315886] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:34:30,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683903246] [2025-03-03 13:34:30,793 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 13:34:30,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:34:30,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:34:30,795 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:34:30,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2025-03-03 13:34:30,870 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 57 statements into 13 equivalence classes. [2025-03-03 13:34:30,890 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) and asserted 57 of 57 statements. [2025-03-03 13:34:30,890 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2025-03-03 13:34:30,890 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:34:30,891 INFO L256 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 30 conjuncts are in the unsatisfiable core [2025-03-03 13:34:30,892 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:34:31,232 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 222 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:34:31,233 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:34:31,427 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 222 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:34:31,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683903246] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:34:31,427 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:34:31,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 45 [2025-03-03 13:34:31,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053301261] [2025-03-03 13:34:31,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:34:31,427 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2025-03-03 13:34:31,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:34:31,428 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2025-03-03 13:34:31,428 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=401, Invalid=1579, Unknown=0, NotChecked=0, Total=1980 [2025-03-03 13:34:31,428 INFO L87 Difference]: Start difference. First operand 71 states and 85 transitions. Second operand has 45 states, 45 states have (on average 2.1777777777777776) internal successors, (98), 45 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:34:31,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:34:31,798 INFO L93 Difference]: Finished difference Result 143 states and 158 transitions. [2025-03-03 13:34:31,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2025-03-03 13:34:31,798 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.1777777777777776) internal successors, (98), 45 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2025-03-03 13:34:31,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:34:31,799 INFO L225 Difference]: With dead ends: 143 [2025-03-03 13:34:31,799 INFO L226 Difference]: Without dead ends: 101 [2025-03-03 13:34:31,799 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 72 SyntacticMatches, 26 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 996 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=401, Invalid=1579, Unknown=0, NotChecked=0, Total=1980 [2025-03-03 13:34:31,799 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:34:31,800 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 142 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:34:31,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2025-03-03 13:34:31,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 71. [2025-03-03 13:34:31,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.2142857142857142) internal successors, (85), 70 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:34:31,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 85 transitions. [2025-03-03 13:34:31,880 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 85 transitions. Word has length 57 [2025-03-03 13:34:31,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:34:31,880 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 85 transitions. [2025-03-03 13:34:31,880 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.1777777777777776) internal successors, (98), 45 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:34:31,880 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 85 transitions. [2025-03-03 13:34:31,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2025-03-03 13:34:31,880 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:34:31,880 INFO L218 NwaCegarLoop]: trace histogram [13, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:34:31,886 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2025-03-03 13:34:32,081 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:34:32,081 INFO L396 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:34:32,081 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:34:32,081 INFO L85 PathProgramCache]: Analyzing trace with hash -1813444149, now seen corresponding path program 66 times [2025-03-03 13:34:32,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:34:32,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095012674] [2025-03-03 13:34:32,081 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-03 13:34:32,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:34:32,085 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 57 statements into 13 equivalence classes. [2025-03-03 13:34:32,091 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) and asserted 57 of 57 statements. [2025-03-03 13:34:32,091 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2025-03-03 13:34:32,091 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:34:32,361 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 188 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:34:32,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:34:32,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095012674] [2025-03-03 13:34:32,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095012674] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:34:32,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840574552] [2025-03-03 13:34:32,361 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-03 13:34:32,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:34:32,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:34:32,363 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:34:32,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2025-03-03 13:34:32,436 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 57 statements into 13 equivalence classes. [2025-03-03 13:34:32,457 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) and asserted 57 of 57 statements. [2025-03-03 13:34:32,457 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2025-03-03 13:34:32,457 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:34:32,458 INFO L256 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 30 conjuncts are in the unsatisfiable core [2025-03-03 13:34:32,459 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:34:32,797 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 222 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:34:32,797 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:34:33,014 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 222 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:34:33,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840574552] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:34:33,014 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:34:33,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 47 [2025-03-03 13:34:33,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515573594] [2025-03-03 13:34:33,014 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:34:33,014 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2025-03-03 13:34:33,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:34:33,015 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2025-03-03 13:34:33,015 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=426, Invalid=1736, Unknown=0, NotChecked=0, Total=2162 [2025-03-03 13:34:33,015 INFO L87 Difference]: Start difference. First operand 71 states and 85 transitions. Second operand has 47 states, 47 states have (on average 2.276595744680851) internal successors, (107), 47 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:34:33,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:34:33,351 INFO L93 Difference]: Finished difference Result 135 states and 150 transitions. [2025-03-03 13:34:33,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2025-03-03 13:34:33,351 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.276595744680851) internal successors, (107), 47 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2025-03-03 13:34:33,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:34:33,352 INFO L225 Difference]: With dead ends: 135 [2025-03-03 13:34:33,352 INFO L226 Difference]: Without dead ends: 93 [2025-03-03 13:34:33,352 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 72 SyntacticMatches, 24 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1169 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=431, Invalid=1825, Unknown=0, NotChecked=0, Total=2256 [2025-03-03 13:34:33,352 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:34:33,352 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 186 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 368 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:34:33,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2025-03-03 13:34:33,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 71. [2025-03-03 13:34:33,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.2142857142857142) internal successors, (85), 70 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:34:33,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 85 transitions. [2025-03-03 13:34:33,431 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 85 transitions. Word has length 57 [2025-03-03 13:34:33,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:34:33,431 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 85 transitions. [2025-03-03 13:34:33,432 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.276595744680851) internal successors, (107), 47 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:34:33,432 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 85 transitions. [2025-03-03 13:34:33,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2025-03-03 13:34:33,432 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:34:33,432 INFO L218 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:34:33,438 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Ended with exit code 0 [2025-03-03 13:34:33,632 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2025-03-03 13:34:33,632 INFO L396 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:34:33,633 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:34:33,633 INFO L85 PathProgramCache]: Analyzing trace with hash 669936107, now seen corresponding path program 12 times [2025-03-03 13:34:33,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:34:33,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519543541] [2025-03-03 13:34:33,633 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-03 13:34:33,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:34:33,638 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 57 statements into 13 equivalence classes. [2025-03-03 13:34:33,644 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) and asserted 57 of 57 statements. [2025-03-03 13:34:33,644 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2025-03-03 13:34:33,644 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:34:33,896 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 188 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:34:33,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:34:33,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519543541] [2025-03-03 13:34:33,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519543541] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:34:33,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079586388] [2025-03-03 13:34:33,896 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-03 13:34:33,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:34:33,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:34:33,898 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:34:33,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2025-03-03 13:34:33,972 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 57 statements into 13 equivalence classes. [2025-03-03 13:34:33,993 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) and asserted 57 of 57 statements. [2025-03-03 13:34:33,993 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2025-03-03 13:34:33,993 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:34:33,994 INFO L256 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 30 conjuncts are in the unsatisfiable core [2025-03-03 13:34:33,995 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:34:34,319 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 222 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:34:34,319 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:34:34,528 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 222 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:34:34,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079586388] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:34:34,529 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:34:34,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 46 [2025-03-03 13:34:34,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111634320] [2025-03-03 13:34:34,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:34:34,529 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2025-03-03 13:34:34,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:34:34,529 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2025-03-03 13:34:34,529 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=431, Invalid=1639, Unknown=0, NotChecked=0, Total=2070 [2025-03-03 13:34:34,530 INFO L87 Difference]: Start difference. First operand 71 states and 85 transitions. Second operand has 46 states, 46 states have (on average 2.282608695652174) internal successors, (105), 46 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:34:34,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:34:34,791 INFO L93 Difference]: Finished difference Result 126 states and 142 transitions. [2025-03-03 13:34:34,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2025-03-03 13:34:34,792 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.282608695652174) internal successors, (105), 46 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2025-03-03 13:34:34,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:34:34,792 INFO L225 Difference]: With dead ends: 126 [2025-03-03 13:34:34,792 INFO L226 Difference]: Without dead ends: 84 [2025-03-03 13:34:34,793 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 73 SyntacticMatches, 24 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1055 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=436, Invalid=1726, Unknown=0, NotChecked=0, Total=2162 [2025-03-03 13:34:34,793 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 374 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:34:34,793 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 192 Invalid, 374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 374 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:34:34,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2025-03-03 13:34:34,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 72. [2025-03-03 13:34:34,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.2253521126760563) internal successors, (87), 71 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:34:34,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 87 transitions. [2025-03-03 13:34:34,870 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 87 transitions. Word has length 57 [2025-03-03 13:34:34,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:34:34,871 INFO L471 AbstractCegarLoop]: Abstraction has 72 states and 87 transitions. [2025-03-03 13:34:34,871 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.282608695652174) internal successors, (105), 46 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:34:34,871 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 87 transitions. [2025-03-03 13:34:34,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2025-03-03 13:34:34,871 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:34:34,871 INFO L218 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:34:34,877 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Ended with exit code 0 [2025-03-03 13:34:35,071 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2025-03-03 13:34:35,071 INFO L396 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:34:35,072 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:34:35,072 INFO L85 PathProgramCache]: Analyzing trace with hash -790376871, now seen corresponding path program 24 times [2025-03-03 13:34:35,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:34:35,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418020550] [2025-03-03 13:34:35,072 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-03 13:34:35,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:34:35,076 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 58 statements into 13 equivalence classes. [2025-03-03 13:34:35,082 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) and asserted 58 of 58 statements. [2025-03-03 13:34:35,082 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2025-03-03 13:34:35,082 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:34:35,229 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 78 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:34:35,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:34:35,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418020550] [2025-03-03 13:34:35,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418020550] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:34:35,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581882172] [2025-03-03 13:34:35,229 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-03 13:34:35,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:34:35,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:34:35,231 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:34:35,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2025-03-03 13:34:35,306 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 58 statements into 13 equivalence classes. [2025-03-03 13:34:35,326 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) and asserted 58 of 58 statements. [2025-03-03 13:34:35,326 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2025-03-03 13:34:35,326 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:34:35,327 INFO L256 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 32 conjuncts are in the unsatisfiable core [2025-03-03 13:34:35,327 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:34:35,370 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 91 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:34:35,370 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:34:35,518 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 91 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:34:35,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581882172] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:34:35,519 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:34:35,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 19 [2025-03-03 13:34:35,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790390838] [2025-03-03 13:34:35,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:34:35,519 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-03-03 13:34:35,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:34:35,519 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-03-03 13:34:35,519 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=214, Unknown=0, NotChecked=0, Total=342 [2025-03-03 13:34:35,519 INFO L87 Difference]: Start difference. First operand 72 states and 87 transitions. Second operand has 19 states, 19 states have (on average 3.4210526315789473) internal successors, (65), 19 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:34:35,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:34:35,745 INFO L93 Difference]: Finished difference Result 83 states and 98 transitions. [2025-03-03 13:34:35,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2025-03-03 13:34:35,746 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.4210526315789473) internal successors, (65), 19 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2025-03-03 13:34:35,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:34:35,746 INFO L225 Difference]: With dead ends: 83 [2025-03-03 13:34:35,746 INFO L226 Difference]: Without dead ends: 81 [2025-03-03 13:34:35,746 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 100 SyntacticMatches, 26 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=362, Invalid=630, Unknown=0, NotChecked=0, Total=992 [2025-03-03 13:34:35,747 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 19 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:34:35,747 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 101 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:34:35,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2025-03-03 13:34:35,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 75. [2025-03-03 13:34:35,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.2162162162162162) internal successors, (90), 74 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:34:35,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 90 transitions. [2025-03-03 13:34:35,834 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 90 transitions. Word has length 58 [2025-03-03 13:34:35,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:34:35,835 INFO L471 AbstractCegarLoop]: Abstraction has 75 states and 90 transitions. [2025-03-03 13:34:35,835 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.4210526315789473) internal successors, (65), 19 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:34:35,835 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 90 transitions. [2025-03-03 13:34:35,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2025-03-03 13:34:35,835 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:34:35,835 INFO L218 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:34:35,841 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0 [2025-03-03 13:34:36,035 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2025-03-03 13:34:36,035 INFO L396 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:34:36,035 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:34:36,036 INFO L85 PathProgramCache]: Analyzing trace with hash -1105806255, now seen corresponding path program 25 times [2025-03-03 13:34:36,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:34:36,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212212449] [2025-03-03 13:34:36,036 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-03 13:34:36,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:34:36,040 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 61 statements into 1 equivalence classes. [2025-03-03 13:34:36,043 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 61 of 61 statements. [2025-03-03 13:34:36,043 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:34:36,043 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:34:36,342 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 223 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:34:36,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:34:36,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212212449] [2025-03-03 13:34:36,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212212449] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:34:36,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198731469] [2025-03-03 13:34:36,342 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-03 13:34:36,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:34:36,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:34:36,344 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:34:36,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2025-03-03 13:34:36,420 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 61 statements into 1 equivalence classes. [2025-03-03 13:34:36,436 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 61 of 61 statements. [2025-03-03 13:34:36,436 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:34:36,436 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:34:36,437 INFO L256 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 32 conjuncts are in the unsatisfiable core [2025-03-03 13:34:36,438 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:34:36,965 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 260 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:34:36,965 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:34:37,238 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 260 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:34:37,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198731469] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:34:37,238 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:34:37,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 62 [2025-03-03 13:34:37,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769031184] [2025-03-03 13:34:37,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:34:37,238 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2025-03-03 13:34:37,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:34:37,239 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2025-03-03 13:34:37,239 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=725, Invalid=3057, Unknown=0, NotChecked=0, Total=3782 [2025-03-03 13:34:37,239 INFO L87 Difference]: Start difference. First operand 75 states and 90 transitions. Second operand has 62 states, 62 states have (on average 2.0161290322580645) internal successors, (125), 62 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:34:37,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:34:37,553 INFO L93 Difference]: Finished difference Result 133 states and 149 transitions. [2025-03-03 13:34:37,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2025-03-03 13:34:37,554 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.0161290322580645) internal successors, (125), 62 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2025-03-03 13:34:37,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:34:37,554 INFO L225 Difference]: With dead ends: 133 [2025-03-03 13:34:37,554 INFO L226 Difference]: Without dead ends: 88 [2025-03-03 13:34:37,555 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 65 SyntacticMatches, 26 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2624 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=730, Invalid=3176, Unknown=0, NotChecked=0, Total=3906 [2025-03-03 13:34:37,555 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:34:37,555 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 188 Invalid, 385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 385 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:34:37,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2025-03-03 13:34:37,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 76. [2025-03-03 13:34:37,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.2133333333333334) internal successors, (91), 75 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:34:37,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 91 transitions. [2025-03-03 13:34:37,652 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 91 transitions. Word has length 61 [2025-03-03 13:34:37,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:34:37,652 INFO L471 AbstractCegarLoop]: Abstraction has 76 states and 91 transitions. [2025-03-03 13:34:37,652 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.0161290322580645) internal successors, (125), 62 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:34:37,652 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 91 transitions. [2025-03-03 13:34:37,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2025-03-03 13:34:37,652 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:34:37,652 INFO L218 NwaCegarLoop]: trace histogram [14, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:34:37,659 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Forceful destruction successful, exit code 0 [2025-03-03 13:34:37,853 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:34:37,853 INFO L396 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:34:37,853 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:34:37,853 INFO L85 PathProgramCache]: Analyzing trace with hash -455010255, now seen corresponding path program 67 times [2025-03-03 13:34:37,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:34:37,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939495803] [2025-03-03 13:34:37,853 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-03 13:34:37,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:34:37,857 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 61 statements into 1 equivalence classes. [2025-03-03 13:34:37,861 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 61 of 61 statements. [2025-03-03 13:34:37,861 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:34:37,861 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:34:38,159 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 223 proven. 116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:34:38,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:34:38,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939495803] [2025-03-03 13:34:38,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939495803] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:34:38,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151811346] [2025-03-03 13:34:38,159 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-03 13:34:38,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:34:38,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:34:38,161 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:34:38,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2025-03-03 13:34:38,238 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 61 statements into 1 equivalence classes. [2025-03-03 13:34:38,254 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 61 of 61 statements. [2025-03-03 13:34:38,254 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:34:38,254 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:34:38,255 INFO L256 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 32 conjuncts are in the unsatisfiable core [2025-03-03 13:34:38,256 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:34:38,761 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 260 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:34:38,761 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:34:39,018 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 260 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:34:39,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151811346] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:34:39,019 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:34:39,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 61 [2025-03-03 13:34:39,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885016976] [2025-03-03 13:34:39,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:34:39,019 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2025-03-03 13:34:39,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:34:39,019 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2025-03-03 13:34:39,020 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=683, Invalid=2977, Unknown=0, NotChecked=0, Total=3660 [2025-03-03 13:34:39,020 INFO L87 Difference]: Start difference. First operand 76 states and 91 transitions. Second operand has 61 states, 61 states have (on average 2.0491803278688523) internal successors, (125), 61 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:34:39,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:34:39,398 INFO L93 Difference]: Finished difference Result 144 states and 160 transitions. [2025-03-03 13:34:39,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2025-03-03 13:34:39,399 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.0491803278688523) internal successors, (125), 61 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2025-03-03 13:34:39,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:34:39,399 INFO L225 Difference]: With dead ends: 144 [2025-03-03 13:34:39,399 INFO L226 Difference]: Without dead ends: 99 [2025-03-03 13:34:39,400 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 66 SyntacticMatches, 26 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2552 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=688, Invalid=3094, Unknown=0, NotChecked=0, Total=3782 [2025-03-03 13:34:39,400 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:34:39,400 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 190 Invalid, 384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:34:39,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2025-03-03 13:34:39,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 76. [2025-03-03 13:34:39,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.2133333333333334) internal successors, (91), 75 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:34:39,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 91 transitions. [2025-03-03 13:34:39,499 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 91 transitions. Word has length 61 [2025-03-03 13:34:39,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:34:39,499 INFO L471 AbstractCegarLoop]: Abstraction has 76 states and 91 transitions. [2025-03-03 13:34:39,499 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.0491803278688523) internal successors, (125), 61 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:34:39,499 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 91 transitions. [2025-03-03 13:34:39,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2025-03-03 13:34:39,499 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:34:39,499 INFO L218 NwaCegarLoop]: trace histogram [14, 13, 13, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:34:39,506 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Ended with exit code 0 [2025-03-03 13:34:39,700 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2025-03-03 13:34:39,700 INFO L396 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:34:39,700 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:34:39,700 INFO L85 PathProgramCache]: Analyzing trace with hash 258719825, now seen corresponding path program 68 times [2025-03-03 13:34:39,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:34:39,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712183659] [2025-03-03 13:34:39,700 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:34:39,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:34:39,704 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 61 statements into 2 equivalence classes. [2025-03-03 13:34:39,708 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 61 of 61 statements. [2025-03-03 13:34:39,708 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:34:39,708 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:34:40,029 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 223 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:34:40,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:34:40,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712183659] [2025-03-03 13:34:40,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712183659] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:34:40,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551556088] [2025-03-03 13:34:40,030 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:34:40,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:34:40,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:34:40,031 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:34:40,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2025-03-03 13:34:40,108 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 61 statements into 2 equivalence classes. [2025-03-03 13:34:40,124 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 61 of 61 statements. [2025-03-03 13:34:40,124 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:34:40,124 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:34:40,125 INFO L256 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 32 conjuncts are in the unsatisfiable core [2025-03-03 13:34:40,126 INFO L279 TraceCheckSpWp]: Computing forward predicates...